A deep foundation pit deformation intelligent monitoring system and a monitoring method

Abstract

The present application relates to the technical field of foundation pit engineering construction monitoring, and discloses a deep foundation pit deformation intelligent monitoring system and a monitoring method. The method establishes a construction monitoring session, divides the enclosure structure into partitions according to the circular underground continuous wall, the straight-line underground continuous wall, the end wall and the support node abutting wall section, registers the monitoring section, the excavation level, the support pass, the precipitation well group and the monitoring configuration version, reads the wall displacement, the support stress, the water level inside and outside the pit, the pore water pressure, the soil pressure and the construction stage record, forms an observation group, forms a stage response window according to the excavation level, the support pass and the precipitation well group operation state, registers the response relationship of each monitoring change in sequence, and distinguishes the precipitation-induced controlled path, the support response abnormal path and the excavation release path, records the registered various paths and the dangerous overrun state to form a construction disposal closed loop, and does not generate the stage release state of the next excavation level before the abnormal path is removed.

Description

Technical Field

[0001] This invention relates to the field of construction monitoring technology for foundation pit engineering, specifically to an intelligent monitoring system and method for deep foundation pit deformation. Background Technology

[0002] Deep foundation pit construction typically requires establishing a stable force balance among diaphragm walls, internal supports, dewatering wells, and the surrounding soil. For underground structures such as tippler houses and underground corridors, the foundation pits often simultaneously present construction conditions including circular diaphragm walls, diaphragm walls for straight underground corridors, multiple internal supports, layered excavation, and external dewatering. During construction, the horizontal displacement of the wall top, the deep horizontal displacement of the wall, the axial force of the supports, the groundwater level, the pore water pressure, the earth pressure, and the surface settlement all change with the excavation depth, the timing of support installation, and the dewatering status. These changes directly affect the stability of the retaining structure and the safety of subsequent construction.

[0003] Existing deep foundation pit monitoring technologies mostly employ inclinometers, settlement monitoring points, water level gauges, pore water pressure gauges, axial force gauges, and automated data acquisition terminals to collect data on wall displacement, support stress, groundwater level, and settlement. Warnings are issued when monitored values ​​exceed preset cumulative values ​​or rate of change thresholds. While this approach enables continuous acquisition of monitoring data and provides over-limit alerts, its judgment criteria typically rely on individual monitoring values ​​or fixed thresholds, failing to adequately integrate the current excavation level, support sequence, dewatering status, and diaphragm wall structural zoning to comprehensively assess the deformation development process.

[0004] In actual construction, diaphragm wall deformation is usually not the result of independent changes in a single monitored quantity, but rather a result of the combined effects of excavation unloading, changes in support constraints, changes in water level difference between inside and outside the pit, dissipation of pore water pressure, and local soil disturbance. While existing monitoring methods can acquire data on wall displacement, support axial force, groundwater level, and pore water pressure separately, they lack a mechanism to establish sequential response relationships based on excavation level, support sequence, dewatering status, and diaphragm wall structural zoning. When dewatering imbalance or abnormal support stress has already caused abnormal development trends in the wall along its depth, but the wall top displacement or cumulative displacement has not yet reached the control threshold, the system struggles to identify the source of abnormal deformation in a timely manner. Conversely, when normal excavation releases deformation that briefly approaches the threshold, false alarms are easily triggered, leading to delayed warnings and unclear response directions. Therefore, it is necessary to propose a monitoring system and method that can link construction stages, support status, dewatering status, and retaining structure zoning to identify and provide graded early warnings for the development path of deep foundation pit deformation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an intelligent monitoring system and method for deep foundation pit deformation, thus solving the aforementioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent monitoring method for deep foundation pit deformation, comprising:

[0007] S1. Establish a construction monitoring session, divide the retaining structure into zones according to the morphology of the diaphragm wall, the adjacency relationship of the end walls and support nodes, and register the monitoring section, excavation level, support sequence, dewatering well group and monitoring configuration version.

[0008] S2. Read the wall displacement, support stress, water level, pore water pressure, earth pressure and construction stage records, and form observation groups according to the retaining structure zoning, monitoring sections and elevation intervals;

[0009] S3. Based on the observation group, excavation level, support sequence and dewatering well group operation status, form a stage response window and record the sequential response relationship of excavation events, support stress changes, water level changes, pore water pressure changes and deep horizontal displacement changes of the wall.

[0010] S4. Based on the sequential response relationship, register the precipitation-induced control path, support response anomaly path, excavation release path, and composite anomaly verification path; among them, the precipitation-induced control path is formed when the water level change and pore water pressure change precede the continuous growth of the deep horizontal displacement of the wall; the support response anomaly path is formed when the support stress anomaly precedes the continuous growth of the deep horizontal displacement of the wall in the corresponding elevation interval; and the excavation release path is formed when the excavation event precedes the growth of the deep horizontal displacement stage of the wall and does not meet the conditions for the formation of anomaly path.

[0011] S5. Based on the precipitation-induced control path, support response anomaly path, excavation release path, and composite anomaly verification path registered in S4, as well as the dangerous over-limit state formed by any one of the following reaching the dangerous control value registered in the monitoring configuration version: cumulative horizontal displacement at the top of the wall, cumulative horizontal displacement at the deep layer of the wall, daily change value of horizontal displacement at the top of the wall, daily change value of horizontal displacement at the deep layer of the wall, support stress value, and water level difference inside and outside the pit, a construction treatment closed loop is formed for the corresponding retaining structure zone; before the precipitation-induced control path, support response anomaly path, composite anomaly verification path, and dangerous over-limit state are resolved, the stage release state of the next excavation level is not generated.

[0012] Furthermore, in S1:

[0013] The zoning registration of the retaining structure is based on the following criteria: wall panel number, wall axis, support layout diagram, dewatering well layout diagram, monitoring point layout diagram, soil profile diagram, and construction stage division record.

[0014] When a partition boundary is missing, it is registered as a pending verification status for the partition data, and no observation group, stage response window, or path record is generated.

[0015] Furthermore, in S1:

[0016] The main load-bearing objects in the handover area are determined according to the order of support constraint source, excavation impact source, and dewatering well group source. The same monitoring section is only assigned to one retaining structure zone.

[0017] Furthermore, in S2:

[0018] The observation group is divided into a key observation group and an auxiliary observation group. The key observation group has records of deep horizontal displacement of the wall and two types of records in the support stress record, pit water level record, and pore water pressure record.

[0019] The auxiliary observation group is used to supplement the records of horizontal displacement at the top of the wall, settlement at the top of the wall, earth pressure, and surface settlement.

[0020] Furthermore, in S2:

[0021] The spatial correspondence between the deep horizontal displacement of the wall and the pore water pressure is established according to the same retaining structure zone, the adjacent range of the same monitoring section, and the same soil layer number.

[0022] The adjacent range of the same monitoring section is the wall width range corresponding to the same monitoring section and the adjacent wall width ranges on both sides of the wall width.

[0023] If a soil layer number is missing, and the displacement growth depth does not exceed the distance between one measuring point and the pore water pressure gauge burial depth, it should be registered as corresponding to the same depth.

[0024] Furthermore, in S3:

[0025] The phase response window uses a time caliber that includes the start time but excludes the end time;

[0026] The composite anomaly path to be verified is formed by the simultaneous occurrence of precipitation-side changes, support-side changes, and continuous growth of deep horizontal displacement of the wall within the same stage response window. Furthermore, the order of water level changes, pore water pressure changes, and support stress changes cannot be uniquely determined due to overlapping sampling cycles, record conflicts, and equipment connection issues.

[0027] If there are unresolved precipitation-induced control paths, support response anomaly paths, composite anomaly paths to be verified, or dangerous over-limit states in the previous stage, no new independent stage response window will be generated in the next excavation level.

[0028] Furthermore, in S4:

[0029] The continuous increase in the deep horizontal displacement of the wall means that the same measuring point increases in the direction into the pit within at least two consecutive effective monitoring periods, and there are records of changes in the same direction on adjacent monitoring sections.

[0030] After the excavation release path is formed, continue to read the changes in water level, pore water pressure, support stress, and earth pressure;

[0031] After the excavation release path is formed, if at least one of the following is registered: the water level difference between the inside and outside of the pit reaches the path control value of the water level difference between the inside and outside of the pit registered in the monitoring configuration version; the pore water pressure reaches the abnormal dissipation judgment condition registered in the monitoring configuration version; insufficient support force; sudden increase in support force; sudden decrease in support force; and prior change in earth pressure, the original excavation release path registration is cancelled and the path registration process is restarted.

[0032] Furthermore, in S5:

[0033] If the conditions for the formation of the same pathway are triggered again during the recovery observation period, a relapse record will be registered.

[0034] Similar paths refer to the formation of precipitation-induced control paths, support response anomaly paths, and composite anomaly verification paths of the same type as the original paths within the same retaining structure zone, the original triggering monitoring section and its adjacent monitoring sections, the original triggering elevation interval and its adjacent elevation interval;

[0035] For enclosure structure zones with recurrence records, the recurrence observation period begins from the next effective monitoring cycle after the execution feedback of the disposal instruction is confirmed by the supervisor. The recurrence observation period covers three effective monitoring cycles. If the same path is not triggered again within three effective monitoring cycles, and the conditions for the removal of the corresponding path are continuously met, and the construction disposal closed loop is registered as closed, the phased release verification will begin.

[0036] On the other hand, the present invention provides an intelligent monitoring system for deformation of deep foundation pits, comprising:

[0037] The module includes a construction monitoring session establishment module, an observation group formation module, a phase response window formation module, a path registration module, and a construction disposal closed-loop module.

[0038] The construction monitoring session establishment module is used to output the session number, retaining structure zoning number, monitoring section number, excavation level number, support pass number, dewatering well group number, and monitoring configuration version number;

[0039] The observation group formation module is used to read the session number, the enclosure structure partition number, the monitoring section number, and the elevation interval number, and output the observation group number, the status of the key observation group, and the status of the auxiliary observation group.

[0040] The phase response window generation module is used to read the observation group number, excavation level number, support passage number, dewatering well group operation status and monitoring configuration version number, and output the phase response window number and the sequence response relationship record;

[0041] The path registration module is used to read the stage response window number and the sequential response relationship record, and output the path number, path type, trigger monitoring section, trigger elevation interval and path status.

[0042] The construction handling closed-loop module is used to read the path number, path type, path status, hazard exceeding the limit status, and execution feedback record, and output the release status, recovery observation period status, recurrence record, and stage release status. Before the dewatering-induced controlled path, support response abnormal path, composite abnormal path to be verified, and hazard exceeding the limit status are released, the stage release status of the next excavation level will not be generated.

[0043] Compared with the prior art, the present invention provides an intelligent monitoring system and method for deep foundation pit deformation, which has the following beneficial effects:

[0044] 1. This invention establishes a construction monitoring session, dividing the circular diaphragm wall, straight diaphragm wall, end wall, and adjacent wall sections of support nodes into retaining structure zones. It then combines excavation levels, support passes, dewatering well group operation status, and elevation intervals to form observation groups and stage response windows. Based on the sequential response relationships between excavation events, support stress changes, water level changes, pore water pressure changes, and deep horizontal displacement changes in the wall, it distinguishes between dewatering-induced control paths, support response anomaly paths, and excavation release paths. This allows for the identification of differences between dewatering imbalance, support stress anomalies, and normal excavation release before the wall displacement reaches a dangerous control value. It provides a path basis for subsequent construction handling closed-loop and staged release control, avoiding the problems of delayed early warnings and unclear handling directions caused by relying solely on single cumulative displacement or fixed threshold alarms.

[0045] 2. This invention forms a closed loop for construction and handling of corresponding retaining structure zones after path registration, and associates dewatering-induced control paths, abnormal support response paths, composite abnormality paths to be verified, and dangerous over-limit states with stage release states; before the abnormal path is resolved, the stage release state for the next excavation level is not generated. This creates a continuous closed loop between monitoring records, abnormality sources, handling instructions, execution feedback, and stage release, improving the monitoring linkage during deep foundation pit layered excavation, support construction, and dewatering control, and reducing the situation where normal excavation release is misjudged as abnormal and genuine abnormalities are delayed in handling. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the process of an intelligent monitoring method for deep foundation pit deformation according to the present invention;

[0047] Figure 2 This is a schematic diagram of the structure of an intelligent monitoring system for deep foundation pit deformation according to the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1: Figure 1 A method for intelligent monitoring of deformation in deep foundation pits is presented, including:

[0050] S1. Establish a construction monitoring session, divide the retaining structure into zones according to the diaphragm wall morphology, end walls, and adjacent relationships of support nodes, and register the monitoring sections, excavation levels, support passes, dewatering well groups, and monitoring configuration versions. Specific implementation details are as follows:

[0051] In this step, the construction monitoring session focuses on the deep foundation pit construction area as the management object. The deep foundation pit construction area is registered according to the actual boundaries of the retaining structure, and the entire project is not treated as a single monitoring object. When there are circular diaphragm walls, straight diaphragm walls, end walls, and adjacent wall sections of support nodes in the construction area, the retaining structure is divided into zones according to the stress characteristics of the retaining structure.

[0052] Circular diaphragm walls are divided into circumferential zones based on wall panel number, circumferential location, ring beam location, and vertical rib location; straight diaphragm walls are divided into span zones based on underground corridor mileage, support span, girder number, and end wall distance; end walls are divided into end-restrained zones based on end excavation location, connection location of adjacent straight diaphragm walls, and adjacent support span; adjacent wall segments at support nodes are divided into adjacent support node zones based on support end bearing location, brace connection location, diagonal brace connection location, and adjacent wall panel number. Each retaining structure zone is registered with a unique zone number, and the same monitoring section is assigned to only one retaining structure zone.

[0053] When registering the zoning of the retaining structure, the basis for the zoning boundaries should be registered simultaneously. The basis for the zoning boundaries includes the wall panel number, wall axis, support layout diagram, dewatering well layout diagram, monitoring point layout diagram, soil profile diagram, and construction stage division record from the design drawings. If the zoning boundary basis is missing, no retaining structure zoning number will be generated; it will only be registered as "zone data pending verification." While in the "zone data pending verification" state, monitoring records and construction records can be saved, but observation groups, stage response windows, and path records cannot be generated. After the zoning boundary basis is completed, the completion time, source of the completed data, and effective construction stage should be registered.

[0054] When there is a junction area between a circular diaphragm wall, a straight diaphragm wall, an end wall, and a wall segment adjacent to a support node, the junction area is uniquely assigned according to the main load-bearing object.

[0055] The primary load-bearing object is determined in the order of support constraint source, excavation influence source, and dewatering well group source. When the monitoring section is located within one adjacent wall section on either side of the support end centerline, or within the directly load-bearing span between two adjacent support nodes, the primary load-bearing object is registered as the wall section adjacent to the support node. When the monitoring section does not fall within the wall section adjacent to the support node but is located within the directly exposed wall section of the current excavation block, the primary load-bearing object is registered as the retaining structure zone corresponding to that excavation block. If neither the support constraint source nor the excavation influence source can be determined, the primary load-bearing object is registered according to the influence range of the dewatering well group. If none of the three sources can be determined, the junction area is registered as a pending verification status for the primary load-bearing object, and no path number is generated.

[0056] The distances from the monitoring section to the end wall, support node, circumferential zoning boundary of the circular diaphragm wall, and span boundary of the straight diaphragm wall are based on the horizontal projection distance from the center point of the monitoring section to the center line of the corresponding boundary. When there are mileage numbers in the direction of the underground corridor, they are recorded by the mileage difference; when there are wall panel numbers in the direction of the circular diaphragm wall, they are recorded by the number of adjacent wall panels and the distance between the center lines of the wall panels.

[0057] When two candidate retaining structure zones are equidistant, the zone with the bearing position at the end of the support is given priority; when neither has a bearing position at the end of the support, the zone is assigned to the retaining structure zone directly exposed by the current excavation block; if they still cannot be distinguished, the zone is registered as pending handover and attribution.

[0058] The continuous circumferential stress range of a circular diaphragm wall is determined jointly by the diaphragm wall sections, the ring beam connection records, and the vertical rib connection records. Adjacent wall sections are numbered, the ring beam is continuously cast between adjacent wall sections, the vertical rib connection records show no interruption, and the wall is not separated by end walls, construction joints, openings, post-cast areas, or temporary disconnection areas; these are then registered as the continuous circumferential stress range.

[0059] When end walls, construction joints, openings, post-cast zones, or temporary disconnection zones exist, this location serves as the circumferential zone boundary. Before the continuous circumferential stress range is confirmed, the displacement records of adjacent sections of the circular diaphragm wall are only used as auxiliary observation records and are not used as the basis for forming the circumferential excavation release path.

[0060] The boundary of the wall segment adjacent to the support node is formed by extending an adjacent wall section to both sides from the bearing position of the support end; if the influence range of the support has been registered in the design documents, the influence range of the support registered in the design documents shall prevail. When both bracing and diagonal bracing are connected to the same wall segment, the wall segment adjacent to the support node shall be formed first by the bearing position of the diagonal bracing end, and the connection position of the bracing shall be used as the auxiliary boundary.

[0061] When the bearing position at the end of the support is missing, the intersection of the support axis and the wall axis is read as the temporary support node position and registered as the support node position pending verification. In this state, support data records can be formed, but abnormal support response paths must not be formed.

[0062] When registering monitoring sections during construction monitoring sessions, the section mileage, corresponding wall panel number, corresponding support span, corresponding dewatering well group, corresponding elevation range, and corresponding monitoring point list should be registered simultaneously.

[0063] Excavation levels are registered according to the actual excavation elevation, excavation block number, excavation start time, excavation end time, excavation direction, and exposed wall section number; support passes are registered according to the support elevation, support type, installation completion time, acceptance time, prestressing value, support stress observation point number, and corresponding support span; dewatering well groups are registered according to their location inside and outside the pit, well group number, start and stop time, operating level, corresponding water level observation point, and corresponding pore water pressure observation point.

[0064] The registration of excavation levels, support passes, and dewatering well groups shall be based on the on-site records of the construction unit, the confirmation records of the supervisor, and the signed records of the construction progress. Unsigned planned progress shall not be considered as valid input.

[0065] The monitoring configuration version is created within the construction monitoring session. The monitoring configuration version registers the following information: monitoring item list, monitoring frequency, cumulative control values, daily change control values, continuous growth judgment period, sudden increase verification limit, allowable support stress range, sudden increase limit for support stress, sudden drop limit for support stress, control value for water level difference between inside and outside the pit, control value for pore water pressure change, control value for earth pressure change, allowable duration for missing data, list of elevation intervals, and list of handling instructions.

[0066] The observation fluctuation limit is used to determine normal measurement fluctuations in continuous monitoring records. The verification limit is used to determine whether there are reading conflicts between the master record and supporting records of the period. The sudden increase verification limit is used to determine abnormal sudden changes within a single monitoring period. The connection stability limit is used to determine whether the continuous observation records after equipment replacement or reset meet the reconnection conditions. Each limit is registered by the monitoring configuration version and corresponds to the wall displacement, support stress, water level, pore water pressure, and earth pressure items, respectively. The control values ​​in the monitoring configuration version are divided into path control values ​​and hazard control values. Path control values ​​are used to form precipitation-induced control paths, support response abnormal paths, and stage release verification. Hazard control values ​​are used to directly form hazard exceedance states. Hazard control values ​​must not be lower than the path control values ​​of the corresponding items.

[0067] The monitoring configuration version also registers the length of the recovery observation period, the length of the relapse observation period, and the conditions for starting the relapse observation period; if the length of the relapse observation period is not registered, the relapse observation period shall be executed in accordance with no less than three valid monitoring cycles.

[0068] The monitoring configuration version is limited to sources such as design documents, foundation pit monitoring plans, specialized construction plans, supervisor confirmation records, and on-site control requirements confirmed by the construction unit. Unsigned temporary records will not be included in the monitoring configuration version. After the monitoring configuration version takes effect, a session number will be generated for the construction monitoring session. The session number is formed by the project area number, the retaining structure zoning number, and the construction stage number in a fixed order.

[0069] Elevation intervals are pre-registered in the monitoring configuration version. Each elevation interval includes the upper limit, lower limit, corresponding soil layer number, corresponding support pass, corresponding excavation level, and a list of corresponding monitoring points. The elevation intervals are formed based on the excavation face elevation, support pass elevation, depth of deep horizontal displacement measuring points in the wall, pore water pressure gauge installation depth, earth pressure cell installation elevation, and soil layer boundary elevation.

[0070] When a deep horizontal displacement measuring point in the wall is located at the boundary of two elevation intervals, it is assigned to the elevation interval closer to the current excavation face elevation; if the distances are the same, it is assigned to the lower elevation interval. When a pore water pressure gauge and an earth pressure cell are located at the boundary of two elevation intervals, they are assigned to the corresponding elevation interval according to the soil layer number in the installation record; if the installation record lacks a soil layer number, they are assigned to the lower elevation interval where the installation elevation is located.

[0071] The excavation face elevation, support track elevation, inclinometer depth, pore water pressure gauge installation depth, earth pressure cell installation elevation, and soil layer boundary elevation are all registered using the same engineering elevation datum. When different datums exist, the original datum name, original elevation value, and source of the conversion datum are registered first, and then unified to the engineering elevation datum registered under the monitoring configuration version. The source of the conversion datum is the design drawings, measurement control point results, or elevation conversion records confirmed by the supervisor. When a conversion datum is missing, the corresponding elevation data is registered as an elevation datum pending verification and is not involved in the elevation interval assignment.

[0072] When the monitoring configuration version changes, the system registers the original version number, the new version number, the effective date of the change, the applicable retaining structure zoning, and the applicable excavation level. Observation groups, stage response windows, path records, and construction handling loops already established before the change continue to use the original monitoring configuration version. New monitoring cycles added after the change use the new monitoring configuration version. After the monitoring configuration version is completed, the system generates a configuration integrity verification record. The configuration integrity verification reads the retaining structure zoning number, monitoring section number, excavation level number, support pass number, dewatering well group number, elevation interval number, and control value list. If all the above numbers and control value lists exist and the applicable construction stages are consistent, the monitoring configuration version is registered as a usable version. If any number is missing, duplicate, the applicable construction stages are inconsistent, or the source of the control values ​​is not verified, it is registered as a configuration pending verification version. Under the configuration pending verification version, the system only saves the original monitoring records, construction stage records, and equipment status records; it does not generate stage response windows or the three types of paths.

[0073] In one specific embodiment, the monitoring configuration version registers parameters according to the foundation pit monitoring scheme. The cumulative path control value for horizontal displacement of the wall is registered as 40mm, and the danger control value is registered as 50mm; the daily change path control value for horizontal displacement of the wall is registered as 2mm, and the danger control value is registered as 3mm. The observation fluctuation limit for deep horizontal displacement of the wall is registered as 1mm, the verification limit as 2mm, the sudden increase verification limit as 3mm, and the connection stability limit as 1mm. The allowable range of support stress is registered as 80% to 120% of the design axial force, and the sudden increase limit and sudden drop limit of support stress are registered as 15% of the design axial force within the adjacent effective monitoring period. The path control value for the water level difference between inside and outside the pit is registered as 80% of the design allowable water level difference, and the danger control value is registered as the design allowable water level difference; the pore water pressure change control value and earth pressure change control value are registered according to the control table of the corresponding soil layer and corresponding elevation interval in the monitoring scheme.

[0074] The above parameters are only an example of a monitoring configuration version. The specific values ​​should be registered according to the design documents, foundation pit monitoring plan, special construction plan, supervision confirmation record and on-site control requirements confirmed by the construction unit. After the monitoring configuration version is changed, the new monitoring cycle shall be executed according to the changed parameters, and the existing observation groups, stage response windows, path records and construction disposal closed loops shall continue to use the original monitoring configuration version.

[0075] The example parameters above are taken from the control value table in the corresponding foundation pit monitoring scheme of this embodiment. The specific values ​​in the application documents are not intended as a uniform limitation for different engineering foundation pits. In actual implementation, the control value list in the monitoring configuration version shall prevail.

[0076] S2. Read records of wall displacement, support stress, water level, pore water pressure, earth pressure, and construction stages. Form observation groups according to the retaining structure zones, monitoring sections, and elevation intervals. The specific implementation is as follows:

[0077] In this step, after the construction monitoring session enters the monitoring cycle, the system reads the horizontal displacement at the top of the wall, the deep horizontal displacement of the wall, the support stress, the water level inside and outside the pit, the pore water pressure, the earth pressure, and the construction stage records according to the monitoring configuration version. Before reading, the system first establishes valid record judgment rules. Valid records must simultaneously meet the following conditions: the measuring point number exists in the construction monitoring session, the observation time falls within the current monitoring cycle, the equipment status is normal or the manual re-measurement status is valid, the recording unit is consistent with the monitoring configuration version, and the reading direction is consistent with the registration direction.

[0078] The units for horizontal displacement at the top of the wall and horizontal displacement deep within the wall are uniformly set to millimeters. The units for supporting forces are registered as kilonewtons or megapascals according to the monitoring configuration version. Water levels inside and outside the pit are registered according to the engineering elevation benchmark. Pore water pressure and earth pressure are stored in the pressure units registered in the monitoring configuration version. When the recorded units are inconsistent with the monitoring configuration version, the system reads the unit conversion record confirmed by the supervisor; if the unit conversion record is missing, the monitoring record is registered in a unit verification pending state and will not be included in the observation group status.

[0079] The horizontal displacement record of the top of the wall is registered with the same measurement reference point, the same monitoring point number on the top of the wall, and the same displacement direction. The displacement direction is uniformly registered into three categories: the direction into the pit, the direction out of the pit, and no valid direction. The no valid direction is used for scenarios such as equipment abnormality, measurement point disturbance, and incomplete manual verification, and is not included in the path registration.

[0080] Deep horizontal displacement records of the wall are registered using the inclinometer tube number, depth location, inclinometer direction, and elevation interval as specifications. The depth location is arranged according to the fixed measuring point spacing in the monitoring configuration version. Support stress records are registered using the support row number, support number, support end location, and stress observation point number as specifications. Water level records inside and outside the pit are registered using the water level observation point inside the pit, the water level observation point outside the pit, the dewatering well group number, and the observation time as specifications.

[0081] Pore ​​water pressure records are recorded using the pore pressure gauge number, burial depth, soil layer number, and observation time. Earth pressure records are recorded using the earth pressure box number, its location inside and outside the wall, installation elevation, and observation time. Construction stage records are recorded using the actual excavation level, support pass acceptance status, and dewatering well group operation status.

[0082] After each monitoring record enters the process, the collection time, observation time, storage time, equipment status, communication status, and data source are first registered. Automatic monitoring records use the equipment collection time as the observation time, while manual observation records use the observation time from the field observation sheet. Supplementary records simultaneously register the reason for supplementation, the original record source, and the person who supplemented the record. Supplementary records are entered into the historical monitoring cycle corresponding to the observation time and are not included in the current monitoring cycle's status registration based on the supplementary storage time.

[0083] When late data enters the system, if the corresponding historical period has not yet formed a construction handling loop, it can participate in the review of that historical period; if the corresponding historical period has already formed a construction handling loop, the late data is saved as a review attachment and does not automatically change the already output handling instructions. When the late data is sufficient to prove that there is a deviation in the original path attribution, the system generates an attribution change record and retains the original path, the original handling instructions, and the basis for the change.

[0084] When the collection frequencies for different monitoring items are inconsistent, the system aligns the time according to the current monitoring cycle. Automatic monitoring records use the valid record closest to the end time of the current monitoring cycle as the cycle record; manual monitoring records use the record whose on-site observation time falls within the current monitoring cycle as the cycle record.

[0085] If a monitoring item has no record in the current monitoring period, but a previous valid record exists within the allowed data loss period registered in the monitoring configuration version, that previous valid record will only be used as a trend reference and will not be considered a new change record for the current period. If no valid record is found after the allowed data loss period, the corresponding monitoring item will be registered as having a data loss status. If any of the following key records are missing: deep horizontal displacement of the wall, support stress, water level inside and outside the pit, and pore water pressure, the observation group must not register a complete and verifiable status.

[0086] When multiple records exist for the same measuring point within the same monitoring cycle, the system determines the master record for the cycle in the order of valid automatic monitoring records, manual retesting and confirmation records, and on-site supplementary records. When the manual retesting record is clearly used to correct equipment abnormalities, the manual retesting and confirmation record is used as the master record for the cycle, and the automatic monitoring record is retained as supporting record.

[0087] When the difference between the master record and the supporting record exceeds the verification limit registered in the monitoring configuration version, the measuring point is registered as a reading conflict pending verification state. In the reading conflict pending verification state, the measuring point does not participate in the formation of precipitation-induced control paths, support response abnormal paths, and excavation release paths. It will re-enter the verification process of the corresponding monitoring cycle after manual re-measurement or equipment inspection is completed.

[0088] After the data is read, observation groups are formed according to the retaining structure zones, monitoring sections, and elevation intervals. These observation groups are further divided into key observation groups and auxiliary observation groups. Key observation groups must have at least one record of deep horizontal displacement of the wall, and two types of records: support stress records, water level records inside and outside the pit, and pore water pressure records. Auxiliary observation groups are used to supplement records of horizontal displacement at the top of the wall, settlement at the top of the wall, earth pressure, and surface settlement.

[0089] When a key observation group lacks records of deep horizontal displacement of the wall, it should not register dewatering-induced control paths, abnormal support response paths, or excavation release paths; only the missing deep horizontal displacement state of the wall should be registered. When a key observation group lacks support stress records, it may register dewatering-induced control paths and excavation release paths, but abnormal support response paths must not be registered. When a key observation group lacks records of water levels inside and outside the pit or pore water pressure records, it may register abnormal support response paths and excavation release paths, but dewatering-induced control paths must not be registered. Data from auxiliary observation groups will not be separately classified into three types of paths; they will only be used as a verification basis for the key observation groups.

[0090] When an observation group is formed, the system generates an observation group number. The observation group number is formed in a fixed order by the retaining structure zoning number, monitoring section number, elevation interval number, and monitoring configuration version number, and remains unchanged during the validity period of the same monitoring configuration version.

[0091] When a new monitoring point is added, a monitoring point is deactivated, a measuring point is moved, the support track number is changed, the precipitation well group is adjusted, or the elevation interval is changed, the system generates a new observation group number and records the original observation group number, the new observation group number, the reason for the change, and the effective time of the change. Monitoring records and path records already generated by the original observation group are retained and are not automatically overwritten when a new observation group is generated. The new observation group is only applicable to the monitoring cycle after the change takes effect.

[0092] When the observation group is formed, the spatial correspondence between the deep horizontal displacement of the wall and the pore water pressure is established according to the same retaining structure zoning, the adjacent range of the same monitoring section, and the same soil layer number. When the soil layer number is missing, if the displacement growth depth and the pore pressure gauge burial depth do not exceed one measuring point spacing, it is registered as the same depth correspondence. If it exceeds one measuring point spacing, it is registered as the adjacent depth pending verification.

[0093] A spatial correspondence is established between the deep horizontal displacement of the wall and the earth pressure based on the same wall section, adjacent wall sections, the same elevation interval, and the same stress-bearing side location. A correspondence is established between the deep horizontal displacement of the wall and the water level inside and outside the pit based on the influence zone of the same dewatering well and the time of water level change.

[0094] When the deep horizontal displacement measuring points, pore water pressure gauges, and earth pressure cells of the wall are all located within the same elevation interval, they are registered as corresponding points within the same elevation interval. When any monitoring point is located in an adjacent elevation interval, it is registered as an adjacent elevation interval pending verification. When spanning more than two elevation intervals, no spatial correspondence is established. Under the condition of adjacent elevation interval pending verification, relevant records can be used as auxiliary observation records, but cannot be used alone as the basis for the formation of precipitation-induced control paths or abnormal support response paths. When the spatial correspondence is not satisfied, changes in water level, pore water pressure, and earth pressure cannot be directly registered as sources of wall deformation, but can only be registered as associated pending verification states.

[0095] During the data reading and observation group formation process, the system performs a monitoring integrity verification. If the deep horizontal displacement of the wall, support stress, water level inside and outside the pit, and pore water pressure in the observation group are all effectively recorded, the equipment status is normal, the communication status is connected, and the measuring point number matches the construction monitoring session, it is registered as a complete and verifiable state.

[0096] When records of deep horizontal displacement of the wall are missing, it is recorded as a state of missing deep horizontal displacement of the wall; when records of support stress are missing and the corresponding support pass has entered the observation period, it is recorded as a state of missing support data; when records of water level inside and outside the pit or pore water pressure are missing and there are records of dewatering well group operation during the period, it is recorded as a state of missing water pressure data; when there is equipment disconnection, communication interruption, sudden reading jump, inconsistent measuring point numbering, or unrecorded measuring point movement, it is recorded as a state of pending data verification. Under the state of pending data verification, no abnormality source path is generated for this monitoring cycle; only retest, supplementary test, and equipment inspection records are output.

[0097] When equipment replacement, maintenance, power outage recovery, communication module replacement, measurement point relocation, or inclinometer repositioning occurs, the system registers the equipment connection pending verification status. Under the equipment connection pending verification status, the relevant equipment readings must not directly indicate a dangerous over-limit condition, but can be saved as a trend observation record.

[0098] Before the equipment is restored to use, initial connection values ​​need to be established. The input for these initial connection values ​​includes at least three consecutive valid observation records after the replacement, simultaneous records from adjacent measuring points, manual re-measurement records, and equipment replacement records. If the difference between the three consecutive valid observation records does not exceed the connection stability limit registered in the monitoring configuration version, and no unreasonable reverse changes occur at adjacent measuring points, these are recorded as initial connection values. After the initial connection values ​​are established, the equipment is reinstated and included in the observation group's judgment; before the initial connection values ​​are established, the observation group maintains a data verification pending status.

[0099] Unreasonable reverse changes in the equipment connection pending verification state are judged based on the adjacent measuring points and adjacent monitoring cycles. If the direction of change is opposite to the record of the adjacent measuring point in the same period of three consecutive valid observation records after the equipment is replaced, and the difference exceeds the observation fluctuation limit registered in the monitoring configuration version, and there are no records of excavation, support adjustment, start-up and shutdown of dewatering well group, or manual re-measurement on site to explain the difference in direction, then it is registered as an unreasonable reverse change.

[0100] When an unreasonable reverse change occurs, no initial connection value is generated, and the equipment continues to remain in the connection pending verification state. If the change direction is opposite but the difference does not exceed the observed fluctuation limit, or if there is a construction event confirmed by the supervisor that can explain the difference in direction, it will not be registered as an unreasonable reverse change.

[0101] When the construction phase records and monitoring records in the observation group are inconsistent, the system registers a phase record conflict. Phase record conflicts include situations where the monitoring record observation time falls within the current phase but the construction phase record has not been registered, support stress records have appeared but the support pass has not been registered for acceptance, dewatering well group operation records have appeared but the dewatering status has not been registered, and the excavation level has changed but the excavation end time is missing.

[0102] In the event of a conflict in the phase records, the observation group can save the monitoring records, but must not enter a fully identifiable state. After the construction phase records are corrected, the system will re-execute the observation group formation process based on the corrected observation time and construction phase.

[0103] S3. Based on the observation group, excavation level, support sequence, and dewatering well group's operational status, a phased response window is formed. The sequential response relationships of excavation events, changes in support stress, water level changes, pore water pressure changes, and deep horizontal displacement changes in the wall are recorded. The specific implementation is as follows:

[0104] In this step, after the observation group is formed, the system generates a stage response window based on the current excavation level, support pass number, dewatering well group operating status, and the observation group. The stage response window uses a time caliber that includes the start time but excludes the end time. When the monitoring record's observation time equals the start time of the stage response window, it is included in that stage response window; when the observation time equals the end time of the stage response window, it is included in the next stage response window.

[0105] The start time of the phase response window is the earliest of the following: the actual start time of the current excavation level, the support acceptance completion time, and the time of change in the operating status of the dewatering well group. If the current excavation level has not yet started, but the support acceptance or the operating status of the dewatering well group has changed, the time of that change is used as the start time of the phase response window. The end time of the phase response window is the earliest of the following: the start time of the next excavation level, the current phase construction and disposal closed-loop closure time, and the monitoring configuration version expiration time.

[0106] If any of the following conditions are met within the stage response window: precipitation-induced control path, support response anomaly path, composite anomaly path to be verified, or hazardous over-limit state, the stage response window continues until that state is resolved. No stage release state is generated for the next excavation level until that state is resolved. If there are unresolved precipitation-induced control paths, support response anomaly paths, composite anomaly paths to be verified, or hazardous over-limit states in the previous stage, even if the next excavation level has already been registered, a new independent stage response window is not generated; instead, it is registered as a continuation observation segment of the previous stage response window. New monitoring records added within the continuation observation segment continue to be included in the construction handling closed loop corresponding to the original anomaly path until the anomaly path is resolved and the recovery observation period is completed.

[0107] After the phase response window is formed, the system registers the sequential response relationships of excavation events, changes in support stress, water level changes, changes in pore water pressure, changes in earth pressure, and changes in deep horizontal displacement of the wall.

[0108] Excavation events are inputted based on the actual excavation start time, excavation end time, excavation face elevation, and excavation block number; support stress changes are inputted based on support stress observation time, support pass number, stress observation point number, and support stress state; water level changes are inputted based on the water level inside and outside the pit, the operating status of the dewatering well group, and the water level observation time; pore water pressure changes are inputted based on the pore pressure gauge number, burial depth, soil layer number, and observation time; earth pressure changes are inputted based on the earth pressure cell installation elevation, the inner and outer positions of the wall, the observation time, and the direction of earth pressure change; deep horizontal displacement changes in the wall are inputted based on the inclinometer tube number, depth position, elevation interval, displacement direction, and observation time. The sequential response relationship is arranged according to the observation time, not the entry time.

[0109] Priority in response relationships is determined by the observation time. If the observation time for water level changes, pore water pressure changes, support stress changes, and earth pressure changes is earlier than the first effective monitoring cycle of continuous increase in the deep horizontal displacement of the wall, it is recorded as prior.

[0110] When two types of changes occur within the same effective monitoring period and the observation times cannot be distinguished, a single sequential response relationship is not registered; instead, it is registered as a concurrent week pending verification state. In the concurrent week pending verification state, the system reads the previous and next effective monitoring periods. If the previous effective monitoring period already showed changes in water level, pore water pressure, or support stress, and the deep horizontal displacement of the wall continues to increase in the next effective monitoring period, the corresponding sequential response relationship is restored; otherwise, a composite pending verification process is initiated.

[0111] An effective monitoring cycle refers to a monitoring cycle in which the key observation group has valid records of deep horizontal displacement of the wall, and the corresponding construction stage records are not in a state of stage record conflict. "Continuous" in "continuous growth" means that there are no data verification pending states, reading conflict verification pending states, stage record conflict states, or equipment connection verification pending states between adjacent effective monitoring cycles.

[0112] If any of the above conditions occur during continuous growth, the continuous growth count will be suspended, and registration will restart from the next valid monitoring period after the condition is resolved. The previous valid record is only used as a trend reference and is not considered a new change record for continuous growth.

[0113] When multiple construction events and monitoring changes occur within the same monitoring period, the system registers them according to the actual occurrence time recorded on site. If the actual occurrence time is missing, the monitoring period is registered as an overlapping condition and enters the composite verification process. When there is no previous valid monitoring period during the initial construction phase, the initial stability record is used as the benchmark. The initial stability record is derived from continuous stability observations before excavation, before the formal operation of dewatering, and before the support stress is formed.

[0114] The first effective monitoring period only registers stable, phased growth, sudden increase pending verification, and data missing states, and does not directly register continuous growth states.

[0115] Stable means that the change in the current effective monitoring period relative to the initial stable record or the previous effective record has not reached the observation fluctuation limit; phased growth means that the new change in the deep horizontal displacement of the wall towards the pit within the current effective monitoring period has reached the observation fluctuation limit, but has not yet met the continuous growth condition, and the new change is located in the elevation interval corresponding to the current excavation face or its near-field response range; sudden increase pending verification means that the new change in the deep horizontal displacement of the wall within the current effective monitoring period has reached the sudden increase verification limit, but has not yet passed manual re-measurement and verification by adjacent monitoring sections.

[0116] The change trend recorded in the sequential response relationship refers to the fact that the same monitoring item changes in the same direction in two adjacent effective monitoring periods, and the change amount in each period reaches the observation fluctuation limit but has not yet reached the corresponding path control value.

[0117] A continuous growth state requires that the same measuring point increases in the direction of the pit within at least two consecutive effective monitoring periods, and that adjacent monitoring sections show records of changes in the same direction.

[0118] Within the phased response window, changes in the deep horizontal displacement of the wall need to establish a spatial correspondence with the current excavation face, support elevation, pore water pressure gauge embedment depth, and earth pressure cell installation elevation. The elevation interval corresponding to the current excavation face is jointly determined by the excavation face elevation, excavation layer thickness, and the elevation interval registered in the monitoring configuration version.

[0119] When the depth of the horizontal displacement increase in the deep wall is within the range of one to two measuring points below the current excavation surface elevation, and this range intersects with the elevation interval corresponding to the current excavation level, and the support stress and precipitation status are not abnormal, it is registered as a stage increase after the excavation event.

[0120] The spacing between one or two measuring points below the current excavation face is used to register the near-field response range of the deep horizontal displacement of the wall after excavation. Whether one or two measuring point spacings are used depends on the monitoring configuration version, based on the inclinometer measuring point spacing, excavation layer thickness, and monitoring plan. If the monitoring configuration version has not registered this, the near-field response range is based on a spacing of two measuring points. If the support influence range has not been registered, the elevation interval where the support pass elevation is located, plus one adjacent elevation interval above and below it, is used as the support influence elevation interval to cover the nearest neighbor response range of the support end constraint to the deep horizontal displacement of the adjacent wall. If the monitoring configuration version has already registered the support influence range, the registered range shall prevail.

[0121] When the depth of the wall's deep horizontal displacement increase is above the current excavation face or beyond the distance between two or more measuring points, it is not registered as a stage increase after the excavation event, but only as an increase state corresponding to a non-current excavation face, and enters the subsequent path review.

[0122] The support influence elevation range is jointly determined by the secondary elevation of the support track, the bearing position of the support end, the height of the girders, and the support influence range in the monitoring configuration version. If the support influence range has been registered in the monitoring configuration version, the registered range is used as the support influence elevation range; if the support influence range has not been registered, the elevation range where the secondary elevation of the support track is located and one adjacent elevation range above and below it are used as the support influence elevation range.

[0123] When the depth of the deep horizontal displacement of the wall falls within the elevation range affected by the support, and the support first experiences any of the following states: insufficient force, sudden increase in force, or sudden decrease in force, it is recorded as a continuous increase after the change in support force.

[0124] When the depth of the wall's deep horizontal displacement does not fall within the elevation range affected by the support, the change in support stress is only used as an auxiliary observation record and not as a direct basis for the formation of abnormal support response paths.

[0125] When the depth of the horizontal displacement increase in the deep layer of the wall and the depth of the pore water pressure gauge are within the same soil layer number, and the water level change and pore water pressure change occur before the continuous increase in the horizontal displacement in the deep layer of the wall, it is recorded as a continuous increase after the water pressure change.

[0126] If the depth of the horizontal displacement increase in the deep layer of the wall does not belong to the same soil layer number as the pore water pressure gauge burial depth, and the distance between the measuring points exceeds one, then the pore water pressure change is only used as an auxiliary observation record and not as a basis for the continuous increase after the water pressure change.

[0127] Once the earth pressure record enters the stage response window, it serves as the basis for engineering verification of precipitation-induced control paths and abnormal support response paths. When the earth pressure record changes in the same direction of force for two consecutive effective monitoring cycles within the same elevation interval, and this change occurs before the continuous increase of the deep horizontal displacement of the wall, it is recorded as an earth pressure prior change state.

[0128] When changes in water level, pore water pressure, and soil pressure all fall within the same elevation range, the soil pressure advance serves as a reinforced verification basis for precipitation-induced control paths. When abnormal support stress, soil pressure advance, and continuous increase in deep horizontal displacement of the wall all fall within the same support influence elevation range, the soil pressure advance serves as a reinforced verification basis for abnormal support response paths.

[0129] The direction of earth pressure change is recorded together with the direction of pressure change on the stressed side of the wall. When the earth pressure behind the wall increases and the earth pressure on the passive side in front of the wall decreases, and this corresponds to the increase in the horizontal displacement of the deep wall towards the pit, it is recorded as an earth pressure change in the same direction as the displacement in the pit. When the earth pressure behind the wall decreases and the earth pressure in front of the wall increases but does not correspond to the direction of the wall displacement, it is recorded as an earth pressure change in the opposite direction pending verification.

[0130] The reverse earth pressure state to be verified is not used as the basis for enhanced verification of precipitation-induced control paths and abnormal support response paths. When earth pressure records are missing, it does not affect the registration of the sequential response relationship between water level changes, pore water pressure changes, support stress changes, and deep horizontal displacement of the wall, but the corresponding path shall not be registered as an enhanced verification state.

[0131] When multiple measurement point records are inconsistent, the system performs a measurement point consistency verification. This verification reads the deep horizontal displacement measurement points of the wall within the same elevation interval within the same observation group, the deep horizontal displacement measurement points of the wall within adjacent elevation intervals, the deep horizontal displacement measurement points of the wall within adjacent monitoring sections, manual re-measurement records, and equipment status records. If a single measurement point shows a sudden increase, and there is no change in the same direction in adjacent elevation intervals and adjacent monitoring sections, and the sudden increase is not confirmed by manual re-measurement, it is registered as a single-point data pending verification state, and does not form a precipitation-induced control path, a support response anomaly path, or an excavation release path.

[0132] When a single measuring point experiences a sudden increase that is confirmed by manual re-measurement, and adjacent monitoring sections within the same elevation interval show changes in the same direction, it is recorded as a valid displacement change. When multiple measuring points show changes simultaneously but in inconsistent directions, it is recorded as a direction conflict pending verification state, and manual re-measurement and equipment inspection instructions are output. Before the direction conflict pending verification state is resolved, the stage release status for the next excavation level will not be generated.

[0133] When external hydrological and construction disturbance events enter the phase response window, the system simultaneously registers external event records. These records include rainfall records, tide level records, drainage records from adjacent works, temporary surcharge records at the pit edge, records of construction machinery approaching the site, and temporary pump stoppage records. External event records do not directly form controlled paths induced by precipitation, abnormal support response paths, or excavation release paths; they only serve as a basis for interpreting changes in water level, pore water pressure, earth pressure, and deep horizontal displacement of the wall.

[0134] If an external event can explain a single water level change but cannot explain changes in pore water pressure and continuous growth in deep horizontal displacement of the wall, it will still be registered for continuous growth after the water pressure change; if an external event can explain changes in water level, pore water pressure, and earth pressure simultaneously, and the deep horizontal displacement of the wall does not increase continuously, it will not be registered for the third type of path.

[0135] S4. Register the precipitation-induced controllable paths, support response anomaly paths, excavation release paths, and composite anomaly verification paths according to the sequential response relationship; among them, the precipitation-induced controllable paths are formed when water level changes and pore water pressure changes precede the continuous increase of deep horizontal displacement of the wall; the support response anomaly paths are formed when support stress anomalies precede the continuous increase of deep horizontal displacement of the wall in the corresponding elevation interval; and the excavation release paths are formed when the excavation event precedes the growth of deep horizontal displacement of the wall but does not meet the conditions for the formation of anomaly paths. The specific implementation is as follows:

[0136] In this step, the system registers precipitation-induced control paths, supporting response anomaly paths, and excavation release paths based on the previously registered sequential response relationships, spatial correspondences, measurement point consistency verification results, and monitoring configuration versions within the stage response window. Path registration is performed on an observation group basis, and only one main path can be registered for the same observation group within the same stage response window. When multiple anomaly path formation conditions are met simultaneously, a single source is not forcibly registered; instead, a composite anomaly path awaiting verification is entered.

[0137] The precipitation-induced control path is formed by the continuous increase of water level changes and pore water pressure changes before the deep horizontal displacement of the wall. When registering the precipitation-induced control path, the system reads the water level inside and outside the pit, the water level difference between inside and outside the pit, the start and stop records of the precipitation well group, the changes in pore water pressure, the preceding changes in soil pressure, and the changes in deep horizontal displacement of the wall within the same observation group.

[0138] When the water level outside the pit changes downward within two consecutive effective monitoring periods and the amount of change reaches the water level change limit registered in the monitoring configuration version, it is recorded as an abnormal drop in the water level outside the pit; when the difference between the water level inside the pit and the water level outside the pit reaches the water level difference control value registered in the monitoring configuration version, it is recorded as the water level difference between inside and outside the pit reaching the control value; when the pore water pressure within the same soil layer number changes in the direction of dissipation within two consecutive effective monitoring periods and the amount of change reaches the pore water pressure change control value, it is recorded as an abnormal dissipation of pore water pressure.

[0139] If any of the following conditions precedes the continuous increase in deep horizontal displacement of the wall, and the water level difference between the inside and outside of the pit reaches the control value, or the pore water pressure dissipates abnormally, and the depth of the increase in deep horizontal displacement of the wall is within the same soil layer number or the corresponding depth range of the pore water pressure gauge, the observation group registers it as a precipitation-induced control path. When the water level change, pore water pressure change, and soil pressure change are all within the same elevation range, the precipitation-induced control path is registered as an enhanced verification state.

[0140] If the above conditions do not reach the corresponding control values, the precipitation-induced control path will not be registered; only the water pressure concern status will be registered. When there are records of rainfall, tides, drainage from adjacent projects, and equipment maintenance, these records will only be used as the basis for interpreting water level changes and will not directly remove the precipitation-induced control path. When pore water pressure and deep horizontal displacement of the wall do not form a spatial correspondence, only the associated verification status will be registered, and the precipitation-induced control path will not be registered.

[0141] An abnormal support response path is formed by the continuous increase of deep horizontal displacement of the wall in the corresponding elevation interval, preceding the abnormal support stress. When registering an abnormal support response path, the system reads the support sequence, support stress observation point, allowable support stress range, limit for sudden increase in support stress, limit for sudden decrease in support stress, prior change in earth pressure, and elevation interval of deep horizontal displacement of the wall within the same observation group.

[0142] When the support stress is lower than the lower limit of the allowable support stress range registered in the monitoring configuration version, it is registered as insufficient stress; when the increase in support stress reaches the support stress surge limit within an effective monitoring cycle, it is registered as a surge in stress; when the decrease in support stress reaches the support stress drop limit within an effective monitoring cycle, and there are no records of support removal, unloading, or construction adjustment confirmed by the supervisor, it is registered as a drop in stress.

[0143] When any of the following conditions—insufficient stress, sudden increase in stress, or sudden decrease in stress—precedes the continuous increase in deep horizontal displacement of the wall within the corresponding support-affected elevation interval, the observation group registers it as an abnormal support response path. When abnormal support stress, prior changes in earth pressure, and continuous increase in deep horizontal displacement of the wall all occur within the same support-affected elevation interval, the abnormal support response path is registered as an enhanced verification state. When the support stress record is in a state of equipment malfunction, reading conflict pending verification, or support node position pending verification, the abnormal support response path is not registered; it is only registered as a support data pending verification state.

[0144] The excavation release path was formed by the growth of the excavation event prior to the deep horizontal displacement stage of the wall, and the support stress and dewatering status were not abnormal. The abnormal dissipation state of pore water pressure refers to the pore water pressure within the same soil layer number and the same elevation interval changing in a direction that reduces the risk of soil resistance on the outside of the retaining structure for no less than two consecutive effective monitoring periods, and the amount of change reaches the pore water pressure change control value registered in the monitoring configuration version.

[0145] When registering the excavation release path, if after the current excavation level is completed, the deep horizontal displacement of the wall shows a phased increase within the distance between one to two measuring points below the current excavation surface, the support stress is within the allowable range, the water level difference between inside and outside the pit does not reach the control value, the pore water pressure does not show abnormal dissipation, the soil pressure does not show a prior abnormal change, and the change direction of adjacent monitoring sections is consistent, the observation group registers it as the excavation release path.

[0146] The excavation release path is only used to register the phased response at the current excavation level and is not used as the basis for automatic release at the next excavation level. Whether the next excavation level should be released is determined by the phased release verification in S5.

[0147] After the excavation release path is formed, water level changes, pore water pressure changes, support stress changes, and earth pressure changes continue to be read within the same stage response window. If, after the excavation release path is formed, any of the following states occur: the water level difference between the inside and outside of the pit reaches the path control value registered in the monitoring configuration version; pore water pressure abnormally dissipates; insufficient stress occurs; stress suddenly increases; stress suddenly decreases; or earth pressure changes occur prematurely, the original excavation release path is registered as cancelled, and the registration process for dewatering-induced control paths, support response anomaly paths, and composite anomaly verification paths is restarted. After the excavation release path is cancelled, the original path number is retained, and the cancellation reason, cancellation time, and trigger record are written into the attribution change record.

[0148] When all three types of paths simultaneously meet some of the formation conditions within the same stage response window, the system registers them according to path priority. The hazardous over-limit state has the highest priority; if the hazardous over-limit state has not formed, the precipitation-induced controllable path and the support response anomaly path take priority over the excavation release path.

[0149] Within the same response window, if there are simultaneous changes on the precipitation side, changes on the support side, and continuous increases in the deep horizontal displacement of the wall, and the sequential response relationship cannot be uniquely determined due to overlapping sampling periods, manual re-measurement and supplementary recording, equipment replacement and connection, correction of construction stage records, or conflicting readings pending verification, the system will not directly register it as a precipitation-induced path to be controlled or a support response abnormal path, but will register it as a composite abnormal path to be verified.

[0150] For composite anomaly paths awaiting verification, the registration includes the path number, reason for verification, relevant precipitation side records, relevant support side records, deep horizontal displacement growth records of the wall, conflict monitoring cycle, and a list of supplementary data. Under composite anomaly paths, no conclusions regarding a single anomaly source are output. The construction response loop simultaneously registers and records the response instructions for verifying the operational status of the precipitation well group, verifying the support stress records, re-measuring pore water pressure, and verifying construction stage records.

[0151] Once the pending cause is resolved, the system will transfer the composite anomaly pending path to the precipitation-induced pending path, the support response anomaly path, the excavation release path, or the closed state according to the completed sequential response relationship; before the pending cause is resolved, the next excavation level stage release state will not be generated.

[0152] When the path formation conditions are incomplete, the system registers the path as pending verification. Incomplete path formation conditions include any of the following: lack of key observation groups, lack of effective monitoring cycles, failure to establish spatial correspondence, sequential response relationships being in the same week pending verification status, failure to pass measurement point consistency verification, or the monitoring configuration version being in a configuration pending verification version.

[0153] The water pressure concern status records situations where water level changes, the difference between water levels inside and outside the pit, or pore water pressure changes have exceeded the observed fluctuation limit but have not yet reached the corresponding path control value. The water pressure concern status is not considered a precipitation-induced controlled path and does not directly block the next excavation stage release. If the water pressure concern status continues to develop within two consecutive effective monitoring cycles and reaches the water level difference control value, water level change limit, or pore water pressure change control value, it is transferred to the precipitation-induced controlled path registration process. The enhanced verification status serves as a verification marker for precipitation-induced controlled paths or abnormal support response paths, and does not form a new abnormal path independently. When a path is registered as an enhanced verification status, the earth pressure verification record is simultaneously registered in the construction closed-loop system, and path release is still executed according to the release conditions of the corresponding path.

[0154] The "Data Pending Verification" status indicates anomalies in equipment, records, readings, measuring point numbers, and communication status. The "Association Pending Verification" status indicates a lack of spatial correspondence between water level, pore water pressure, earth pressure, and deep horizontal displacement of the wall. The "Path Pending Verification" status indicates situations where the path formation conditions have not yet been met due to issues with key observation groups, effective monitoring cycles, spatial correspondence, sequential response relationships, or measuring point consistency verification. The "Data Pending Verification" status is lifted upon retesting or equipment inspection; the "Association Pending Verification" status is lifted upon correction of spatial correspondence; and the "Path Pending Verification" status is lifted after the path formation conditions are met.

[0155] When the path is pending verification, the system saves the read monitoring records and construction stage records, and outputs corresponding supplementary measurement, re-measurement, configuration correction and manual verification instructions; before the path pending verification status is lifted, the system does not register the controlled path induced by precipitation, the abnormal support response path and the excavation release path.

[0156] The registration of hazardous exceedance states is not restricted by the order in which the three types of paths are formed. A hazardous exceedance state is directly registered when at least one of the following—the cumulative horizontal displacement at the top of the wall, the cumulative horizontal displacement deep within the wall, the daily change in horizontal displacement at the top of the wall, and the daily change in horizontal displacement deep within the wall—along with the support stress value and the difference in water level inside and outside the pit, reaches the hazardous control value registered in the monitoring configuration version, and the corresponding record passes the monitoring integrity verification. Once a hazardous exceedance state is formed, new registrations for the three types of paths cease, and existing paths enter a closed-loop hazardous response process. The path registration process resumes only after the hazardous exceedance state is resolved.

[0157] After route registration is completed, a route number is generated for each route. The route number is formed in a fixed order by the project area number, retaining structure zoning number, monitoring section number, construction stage number, and monitoring cycle number. Once generated, the route number does not change regardless of the status of the operation.

[0158] When a correction is made during the construction phase, the system generates a correction record and retains the original path number. The correction record only affects subsequent status judgments and does not delete existing path records and handling records. If the corrected construction time changes the attribution of the anomaly source, the system registers an attribution change record, which records the original input quantity, the corrected input quantity, the original path, the new path, and the change time.

[0159] In this application, path registration refers to writing the precipitation-induced control paths, support response anomaly paths, excavation release paths, and composite anomaly verification paths that meet the conditions into the path record within the stage response window, based on the sequential response relationship and corresponding formation conditions. The path record registers the path number, path type, trigger monitoring section, trigger elevation interval, trigger time, trigger monitoring items, path status, and the monitoring configuration version used; the path referred to in the construction and disposal closed loop is the path number and path type corresponding to the above path record.

[0160] S5. Based on the precipitation-induced control path, support response anomaly path, excavation release path, and composite anomaly verification path registered in S4, and the dangerous over-limit state formed by any one of the following reaching the dangerous control value registered in the monitoring configuration version: cumulative horizontal displacement at the top of the wall, cumulative horizontal displacement at the depth of the wall, daily change in horizontal displacement at the top of the wall, daily change in horizontal displacement at the depth of the wall, support stress value, and water level difference inside and outside the pit, a construction treatment closed loop is formed for the corresponding retaining structure zone; before the precipitation-induced control path, support response anomaly path, composite anomaly verification path, and dangerous over-limit state are resolved, the stage release state for the next excavation level is not generated, specifically implemented as follows:

[0161] In this step, the system forms a closed-loop construction response for the corresponding retaining structure zone based on the precipitation-induced control paths, support response anomaly paths, excavation release paths, composite anomaly verification paths, and hazardous over-limit states registered in S4. The closed-loop construction response registers the path number, retaining structure zone number, trigger monitoring section, trigger elevation interval, trigger time, response command, execution feedback, verification record, release conditions, recovery observation period, and staged release status. The closed-loop construction response only applies to the retaining structure zone, monitoring section, and elevation interval corresponding to the path number and does not automatically extend to other retaining structure zones.

[0162] Once the controlled path is formed due to precipitation, the disposal instructions are registered as follows: verify the operating status of the precipitation well group, re-measure the water level outside the pit, re-measure the pore water pressure, verify the prior changes in soil pressure, temporarily suspend the excavation of the corresponding retaining structure zone, and check the impact of drainage outside the pit.

[0163] The conditions for removing a precipitation-induced controlled path from the monitoring configuration are as follows: the water level difference between the inside and outside of the pit is lower than the water level difference control value registered in the monitoring configuration version for two consecutive effective monitoring cycles; the pore water pressure within the same soil layer number has not continued to change in the risk direction for two consecutive effective monitoring cycles, and the change amount has not reached the pore water pressure change control value; the deep horizontal displacement of the wall within the same inclinometer tube number and the same elevation interval has not shown any new changes in the direction of the pit for two consecutive effective monitoring cycles, or the new changes have not reached the observation fluctuation limit registered in the monitoring configuration version; and the operation verification record of the precipitation well group has been completed. After all four conditions are met, the precipitation-induced controlled path enters the recovery observation period.

[0164] Once an abnormal support response path is formed, the handling instructions are registered as follows: verify support nodes, re-measure support stress, inspect bearing components at the support ends, verify prior changes in earth pressure, suspend excavation of the corresponding retaining structure zone, and register design verification records.

[0165] The conditions for resolving abnormal support response paths are as follows: Support node verification is completed; the support stress corresponding to the support number remains within the allowable support stress range registered in the monitoring configuration version for two consecutive effective monitoring periods, and there is no insufficient stress, sudden increase in stress, or sudden decrease in stress; the deep horizontal displacement of the wall corresponding to the support-affected elevation interval has not continued to increase in the direction into the pit for two consecutive effective monitoring periods, or the new changes have not reached the observation fluctuation limit; and the next excavation level has not been initiated. Once all four conditions are met, the abnormal support response path enters the recovery observation period.

[0166] After the excavation release path is established, the disposal instruction is registered as maintaining the monitoring frequency and stage review record. If the deep horizontal displacement of the wall does not continue to increase in the direction of the pit within two consecutive effective monitoring cycles, the support stress is within the allowable range, the water level difference between inside and outside the pit does not reach the control value, the pore water pressure does not dissipate abnormally, and there are no unclosed dewatering-induced control paths, abnormal support response paths, composite abnormality verification paths, or dangerous over-limit states in the current retaining structure zone, then the stage release verification is initiated.

[0167] The excavation release path is only used as a phased response record at the current excavation level and is not directly used as the basis for automatic release at the next excavation level.

[0168] Once a composite anomaly path is formed, the construction response closed loop simultaneously reads the release conditions for both the dewatering-induced control path and the support response anomaly path. The response instructions are registered as follows: verify the operating status of the dewatering well group, re-measure the water level inside and outside the pit, re-measure the pore water pressure, verify the support nodes, re-measure the support stress, re-measure the deep horizontal displacement of the wall, and suspend the corresponding retaining structure zone excavation.

[0169] When the water level difference between inside and outside the pit, pore water pressure, deep horizontal displacement of the wall, support stress, and support node verification all meet the corresponding release conditions, the composite anomaly pending path enters the recovery observation period; if any release condition is not met, the composite anomaly pending path continues to exist. Before the composite anomaly pending path is released, the stage release status of the next excavation level will not be generated.

[0170] Once a dangerous over-limit condition is established, the construction response closed loop is registered as a dangerous response closed loop. The response instructions for the dangerous response closed loop include at least stopping the excavation of the corresponding retaining structure zone, sealing the trigger monitoring records, retesting the trigger monitoring points, verifying adjacent monitoring sections, verifying the support and dewatering status, and registering the design review comments.

[0171] The conditions for resolving the hazardous exceedance status are as follows: the monitoring item that triggered the hazardous exceedance has been retested; the retested value has not reached the hazardous control value registered in the monitoring configuration version; the dewatering-induced control path, support response anomaly path, and composite anomaly verification path of the relevant retaining structure zone have all been closed; and the design review opinions and supervision confirmation status have been registered. Before the hazardous exceedance status is resolved, the stage release status for the next excavation level will not be generated.

[0172] Risk directions are registered separately according to the monitoring items. The risk direction for deep horizontal displacement of the wall is a new change towards the pit; the risk direction for water level difference between inside and outside the pit is a continued increase in the water level difference; the risk direction for pore water pressure is a continued change towards the abnormal dissipation direction within the same soil layer number; the risk direction for support stress is a continued drop below the allowable range, a continued sudden increase, or a continued sudden decrease; the risk direction for earth pressure is a continued formation of earth pressure changes corresponding to the wall's displacement into the pit.

[0173] The recovery observation period is registered by the monitoring configuration version and must cover at least two valid monitoring cycles. During the recovery observation period, if the water level difference between the inside and outside of the pit, the pore water pressure, and the deep horizontal displacement of the wall corresponding to the precipitation-induced control path do not continue to change in the direction of risk, the precipitation-induced control path is closed; if the support stress and the deep horizontal displacement of the wall corresponding to the support response anomaly path do not continue to change in the direction of risk, the support response anomaly path is closed; if the precipitation-side conditions and support-side conditions corresponding to the composite anomaly verification path are not triggered again, and the verification cause has been resolved, the composite anomaly verification path is closed.

[0174] If the conditions for forming a similar path are triggered again during the recovery observation period, the recovery observation period ends, the original path becomes effective again, and a recurrence record is registered. The recurrence record includes the original path number, recurrence time, recurrence measurement point, recurrence elevation interval, initial treatment action, and the current trigger record.

[0175] Similar paths refer to the formation of precipitation-induced control paths, support response anomaly paths, and composite anomaly verification paths of the same type as the original path within the same retaining structure zone, the original triggering monitoring section and its adjacent monitoring sections, the original triggering elevation interval and its adjacent elevation interval. Retaining structure zones with recurrence records will enter a recurrence observation period starting from the next effective monitoring cycle after the execution feedback of this treatment instruction is confirmed by the supervisor.

[0176] The recurrence observation period must cover at least three valid monitoring cycles. The first valid monitoring cycle records the retest status after treatment, the second valid monitoring cycle records the continuous and stable confirmation status, and the third valid monitoring cycle records the verification status before phased release. Within these three valid monitoring cycles, the same retaining structure zone, the original triggering monitoring section and its adjacent monitoring sections, and the original triggering elevation interval and its adjacent elevation interval must not trigger the same path again, and the construction treatment loop must be closed before phased release verification can proceed. If data is pending verification, reading conflicts are pending verification, phase record conflicts occur, or equipment connection is pending verification during the recurrence observation period, that cycle will not be counted towards the three valid monitoring cycles. Valid monitoring cycles will be re-registered continuously after the aforementioned conditions are resolved.

[0177] The phased release verification reads and reads the monitoring integrity status, structural response status, precipitation response status, support response status, and closed-loop disposal status.

[0178] The deep horizontal displacement of the wall, the support stress, the water level inside and outside the pit, and the pore water pressure are all effectively recorded. The horizontal displacement of the wall has not reached the cumulative control value, the daily change has not reached the daily change control value, the deep horizontal displacement of the wall has not formed a continuous growth state, the water level difference inside and outside the pit has not reached the control value, the pore water pressure has not formed an abnormal dissipation, the support stress has not formed a state of insufficient stress, sudden increase in stress, or sudden drop in stress, and the pore water pressure change has not met the abnormal dissipation judgment conditions registered in the monitoring configuration version. Furthermore, if there are no unclosed rainwater-induced control paths, abnormal support response paths, composite abnormal paths to be verified, or dangerous over-limit states in the current retaining structure zone, the stage release status of the next excavation level shall be registered.

[0179] The phased release status only applies to the corresponding retaining structure zone, the corresponding monitoring section, and the corresponding excavation level, and does not extend to other retaining structure zones. When an adjacent retaining structure zone has an unclosed abnormal status, the phased release status of the current retaining structure zone will simultaneously register a risk warning for the adjacent zone; if the current retaining structure zone and the adjacent retaining structure zone share the same support span, the same dewatering well group, or the same junction area, a phased release status will not be generated.

[0180] Before the controlled paths induced by precipitation and the abnormal support response paths are resolved, the corresponding retaining structure zone will not generate a stage release status for the next excavation level. When the next excavation level has started but the above paths are not closed, the system registers the advanced construction controlled status and writes the advanced construction controlled status into the construction handling closed loop. The advanced construction controlled status registers the reason for advanced construction, the excavation level that has been started, the number of the unclosed path, and the corresponding retaining structure zone.

[0181] The conditions for lifting the pre-construction pending status are: stopping further excavation in the retaining structure zone; completing the construction records for the already initiated excavation levels; completing the closed-loop management of any unclosed paths; and passing the phased release verification. Before the pre-construction pending status is lifted, no new phased release status may be generated for the same retaining structure zone.

[0182] When a stage fails to grant passage, the system registers the stage as not allowing passage. The stage not allowing passage registers the unmet conditions, the corresponding monitoring section, the corresponding elevation interval, the unclosed path number, and the review instruction.

[0183] If the failure to meet the conditions is due to missing data, output a supplementary measurement instruction and a supplementary measurement deadline; if the failure to meet the conditions is due to equipment malfunction, output instructions for equipment inspection, manual re-measurement, and reconstruction of initial values; if the failure to meet the conditions is due to unresolved control paths induced by precipitation, output instructions for dewatering well group operation verification, water level re-measurement, pore water pressure re-measurement, and temporary suspension of excavation; if the failure to meet the conditions is due to unresolved abnormal support response paths, output instructions for support node verification, support stress re-measurement, end bearing component inspection, and temporary suspension of excavation. Before the "stage cannot be released" status is closed, the construction monitoring session cannot generate the stage release status for the next excavation level.

[0184] After a disposal instruction is generated, the system registers the execution feedback. The execution feedback must correspond item-by-item with the disposal instruction, registering at least the disposal instruction number, execution time, executing unit, on-site verification record number, re-measurement record number, and supervisor confirmation status. The measuring point number, monitoring section, elevation interval, and retaining structure zoning in the re-measurement record must be consistent with the trigger path; if inconsistent, the execution feedback will be registered as a feedback object inconsistency status and will not be used as a basis for closing the loop.

[0185] If the on-site verification record lacks the execution time, the executing unit, or the supervisor's confirmation status, it should be registered as "feedback data pending verification" or "construction handling closed-loop maintenance in progress."

[0186] When no action instruction receives feedback, the closed-loop status is registered as incomplete; when action feedback has been registered but the release conditions are not met, the closed-loop status is registered as processing; when an action instruction fails to receive feedback after the feedback period registered in the monitoring configuration version, it is registered as overdue.

[0187] When a situation is overdue, the system continues to save monitoring records but does not close the corresponding path or generate a stage release status for the next excavation level. If execution feedback is submitted after the overdue period, the system records the submission time, reason, and supervisor confirmation status; after confirmation, the system re-enters the verification of release conditions. When the release conditions are met and the observation period is completed, the closed-loop status is registered as closed. After the construction handling closed loop is closed, the system generates a closure record, which is used as one of the bases for stage release at the next excavation level. Through this process, unresolved risks from the previous construction stage directly constrain the stage release status of the next excavation level.

[0188] The phased release status only indicates that the corresponding retaining structure zone meets the monitoring conditions for entering the next excavation level under the current monitoring configuration version and the current construction stage. It does not replace design review, supervision acceptance and on-site construction permit procedures.

[0189] Example 2: Figure 2 A schematic diagram of the structure of an intelligent monitoring system for deep foundation pit deformation according to the present invention is provided. The intelligent monitoring system for deep foundation pit deformation includes:

[0190] The module includes a construction monitoring session establishment module, an observation group formation module, a phase response window formation module, a path registration module, and a construction disposal closed-loop module.

[0191] The construction monitoring session establishment module is used to output the session number, retaining structure zoning number, monitoring section number, excavation level number, support pass number, dewatering well group number, and monitoring configuration version number;

[0192] The observation group formation module is used to read the session number, the enclosure structure partition number, the monitoring section number, and the elevation interval number, and output the observation group number, the status of the key observation group, and the status of the auxiliary observation group.

[0193] The phase response window generation module is used to read the observation group number, excavation level number, support passage number, dewatering well group operation status and monitoring configuration version number, and output the phase response window number and the sequence response relationship record;

[0194] The path registration module is used to read the stage response window number and the sequential response relationship record, and output the path number, path type, trigger monitoring section, trigger elevation interval and path status.

[0195] The construction handling closed-loop module is used to read the path number, path type, path status, hazard exceeding the limit status, and execution feedback record, and output the release status, recovery observation period status, recurrence record, and stage release status. Before the dewatering-induced controlled path, support response abnormal path, composite abnormal path to be verified, and hazard exceeding the limit status are released, the stage release status of the next excavation level will not be generated.

[0196] When the system is running, the construction monitoring session establishment module first generates a session number, retaining structure zoning number, monitoring section number, excavation level number, support pass number, dewatering well group number, and monitoring configuration version number, and then sends the above numbers to the observation group formation module.

[0197] The observation group formation module reads the deep horizontal displacement of the wall, the support stress, the water level inside and outside the pit, the pore water pressure, the earth pressure, and the construction stage records based on the retaining structure zoning number, monitoring section number, and elevation interval number. It then forms an observation group number and sends the observation group number, the key observation group status, the auxiliary observation group status, and the data pending verification status to the stage response window formation module.

[0198] The phase response window generation module reads the observation group number, excavation level number, support pass number, dewatering well group operation status and monitoring configuration version number, generates a phase response window number, and outputs a record of the sequential response relationship of excavation events, support stress changes, water level changes, pore water pressure changes and deep wall horizontal displacement changes.

[0199] The path registration module reads the stage response window number and the sequential response relationship record to form the path number, path type, trigger monitoring section, trigger elevation interval, path status and reason to be verified; the path type includes precipitation-induced path to be controlled, support response abnormal path, excavation release path and composite abnormal path to be verified.

[0200] The path registration module also verifies the limits for the cumulative horizontal displacement at the top of the wall, the cumulative horizontal displacement deep within the wall, the daily change in horizontal displacement at the top of the wall, the daily change in horizontal displacement deep within the wall, the support stress value, and the water level difference between the inside and outside of the pit, based on the hazard control values ​​registered in the monitoring configuration version. When any of the above reaches the hazard control value and the corresponding record passes the monitoring integrity verification, a hazard exceeding the limit status is established and sent to the construction handling closed-loop module. The hazard exceeding the limit status is not considered a path type; once a hazard exceeding the limit status is established, the established path enters the hazard handling closed loop, and the path registration process resumes after the hazard exceeding the limit status is lifted.

[0201] The construction disposal closed-loop module reads the path number, path type, path status, reason for pending verification, danger exceeding limit status, and execution feedback record to form the construction disposal closed-loop number for the corresponding retaining structure zone, and registers the disposal instruction, execution feedback, review record, release status, recovery observation period status, recurrence record, and stage release status.

[0202] After receiving the clearance status feedback from the construction disposal closed-loop module, the path registration module updates the corresponding path status; when the stage response window formation module receives feedback on unresolved paths, dangerous over-limit states, and composite abnormal paths awaiting verification, it does not generate an independent stage response window for the next excavation level.

[0203] It should be noted that this invention can be deployed on the device itself to realize embedded applications, or it can run on a PC or other terminal with a user interface, thereby meeting various hardware environments and usage requirements.

[0204] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above embodiments can be implemented in whole or in part by a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions of the embodiments of this application are implemented in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted wirelessly or wiredly from one website, computer, server, or data center to another website, computer, server, or data center. Wired methods include optical fiber, twisted pair, coaxial cable, etc. Wireless methods include infrared, microwave, etc. Available media include any available media that can be accessed by a computer or data storage devices such as servers and data centers that contain one or more sets of available media. Available media can be magnetic media (floppy disks, hard disks, magnetic tapes), optical media (DVDs), or semiconductor media. Semiconductor media can be solid-state drives.

[0205] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for intelligent monitoring of deformation in deep foundation pits, characterized in that, include: S1. Establish a construction monitoring session, divide the retaining structure into zones according to the morphology of the diaphragm wall, the adjacency relationship of the end walls and support nodes, and register the monitoring section, excavation level, support sequence, dewatering well group and monitoring configuration version. S2. Read the wall displacement, support stress, water level, pore water pressure, earth pressure and construction stage records, and form observation groups according to the retaining structure zoning, monitoring sections and elevation intervals; S3. Based on the observation group, excavation level, support sequence and dewatering well group operation status, form a stage response window, and record the sequential response relationship of excavation events, support stress changes, water level changes, pore water pressure changes and deep wall horizontal displacement changes. S4. Based on the sequential response relationship, register the precipitation-induced control path, support response anomaly path, excavation release path, and composite anomaly verification path; among them, the precipitation-induced control path is formed when the water level change and pore water pressure change precede the continuous growth of the deep horizontal displacement of the wall; the support response anomaly path is formed when the support stress anomaly precedes the continuous growth of the deep horizontal displacement of the wall in the corresponding elevation interval; and the excavation release path is formed when the excavation event precedes the growth of the deep horizontal displacement stage of the wall and does not meet the conditions for the formation of anomaly path. S5. Based on the precipitation-induced control path, support response anomaly path, excavation release path, and composite anomaly verification path registered in S4, as well as the dangerous over-limit state formed by any one of the following reaching the dangerous control value registered in the monitoring configuration version: cumulative horizontal displacement at the top of the wall, cumulative horizontal displacement at the deep layer of the wall, daily change value of horizontal displacement at the top of the wall, daily change value of horizontal displacement at the deep layer of the wall, support stress value, and water level difference inside and outside the pit, a construction treatment closed loop is formed for the corresponding retaining structure zone; before the precipitation-induced control path, support response anomaly path, composite anomaly verification path, and dangerous over-limit state are resolved, the stage release state of the next excavation level is not generated.

2. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S1: The zoning registration of the retaining structure is based on the following criteria: wall panel number, wall axis, support layout diagram, dewatering well layout diagram, monitoring point layout diagram, soil profile diagram, and construction stage division record. When a partition boundary is missing, it is registered as a pending verification status for the partition data, and no observation group, stage response window, or path record is generated.

3. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S1: The main load-bearing objects in the handover area are determined according to the order of support constraint source, excavation impact source, and dewatering well group source. The same monitoring section is only assigned to one retaining structure zone.

4. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S2: The observation group is divided into a key observation group and an auxiliary observation group. The key observation group has records of deep horizontal displacement of the wall and two types of records in the support stress record, pit water level record, and pore water pressure record. The auxiliary observation group is used to supplement the records of horizontal displacement at the top of the wall, settlement at the top of the wall, earth pressure, and surface settlement.

5. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S2: The spatial correspondence between the deep horizontal displacement of the wall and the pore water pressure is established according to the same retaining structure zone, the adjacent range of the same monitoring section, and the same soil layer number; The adjacent range of the same monitoring section is the wall width range corresponding to the same monitoring section and the adjacent wall width ranges on both sides of the wall width. If a soil layer number is missing, and the displacement growth depth does not exceed the distance between one measuring point and the pore water pressure gauge burial depth, it should be registered as corresponding to the same depth.

6. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S3: The phase response window uses a time caliber that includes the start time but excludes the end time; The composite anomaly path to be verified is formed by the simultaneous occurrence of precipitation-side changes, support-side changes, and continuous growth of deep horizontal displacement of the wall within the same stage response window. Furthermore, the order of water level changes, pore water pressure changes, and support stress changes cannot be uniquely determined due to overlapping sampling cycles, record conflicts, and equipment connection issues. If there are unresolved precipitation-induced control paths, support response anomaly paths, composite anomaly paths to be verified, or dangerous over-limit states in the previous stage, no new independent stage response window will be generated in the next excavation level.

7. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S4: The continuous increase in the deep horizontal displacement of the wall is defined as the increase in the direction of the pit at the same measuring point within at least two consecutive effective monitoring periods, and the existence of records of change in the same direction at adjacent monitoring sections. After the excavation release path is formed, continue to read the changes in water level, pore water pressure, support stress, and earth pressure; After the excavation release path is formed, if at least one of the following is registered: the water level difference between the inside and outside of the pit reaches the path control value of the water level difference between the inside and outside of the pit registered in the monitoring configuration version; the pore water pressure reaches the abnormal dissipation judgment condition registered in the monitoring configuration version; insufficient support force; sudden increase in support force; sudden decrease in support force; and prior change in earth pressure, the original excavation release path registration is cancelled and the path registration process is restarted.

8. The intelligent monitoring method for deep foundation pit deformation according to claim 1, characterized in that, In S5: If the conditions for the formation of the same pathway are triggered again during the recovery observation period, a relapse record will be registered. Similar paths refer to the formation of precipitation-induced control paths, support response anomaly paths, and composite anomaly verification paths of the same type as the original paths within the same retaining structure zone, the original triggering monitoring section and its adjacent monitoring sections, the original triggering elevation interval and its adjacent elevation interval; For enclosure structure zones with recurrence records, the recurrence observation period begins from the next effective monitoring cycle after the execution feedback of the disposal instruction is confirmed by the supervisor. The recurrence observation period covers three effective monitoring cycles. If the same path is not triggered again within three effective monitoring cycles, and the conditions for the removal of the corresponding path are continuously met, and the construction disposal closed loop is registered as closed, the phased release verification will begin.

9. A deep foundation pit deformation intelligent monitoring system, used to implement the deep foundation pit deformation intelligent monitoring method according to any one of claims 1-8, characterized in that, include: The module includes a construction monitoring session establishment module, an observation group formation module, a phase response window formation module, a path registration module, and a construction disposal closed-loop module. The construction monitoring session establishment module is used to output the session number, retaining structure zoning number, monitoring section number, excavation level number, support pass number, dewatering well group number, and monitoring configuration version number; The observation group formation module is used to read the session number, the enclosure structure partition number, the monitoring section number, and the elevation interval number, and output the observation group number, the status of the key observation group, and the status of the auxiliary observation group. The phase response window generation module is used to read the observation group number, excavation level number, support passage number, dewatering well group operation status and monitoring configuration version number, and output the phase response window number and the sequence response relationship record; The path registration module is used to read the stage response window number and the sequential response relationship record, and output the path number, path type, trigger monitoring section, trigger elevation interval and path status. The construction handling closed-loop module is used to read the path number, path type, path status, hazard exceeding the limit status, and execution feedback record, and output the release status, recovery observation period status, recurrence record, and stage release status. Before the dewatering-induced controlled path, support response abnormal path, composite abnormal path to be verified, and hazard exceeding the limit status are released, the stage release status of the next excavation level will not be generated.

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