Shield tunnel proximity construction scheme generation method and system

Abstract

The invention discloses a shield tunnel proximity construction scheme intelligent generation method and system, and is applied to the intelligent information technology. The method comprises the following steps: obtaining structure parameters and geological exploration parameters; calculating a stratum bearing parameter according to the geological exploration parameter, and calculating an expected load of the target adjacent building; calculating a maximum basic boundary; and the proximity construction influence range of the shield interval tunnel is calculated, and a proximity construction scheme is determined according to the intersection range of the proximity construction influence range and the maximum foundation boundary. According to the intelligent generation method and system for the proximity construction scheme of the shield tunnel, the possible influence range of the foundation is estimated to the maximum extent by utilizing the obtained ground data and geological exploration data, so that safe proximity construction of the shield tunnel is realized under the condition that the foundation condition is unknown; the influence of proximity construction on the existing building is reduced to the minimum, and the method is suitable for various different existing building types and has extremely high adaptability.

Description

Technical Field

[0001] The present invention relates to the field of information intelligent technology, and in particular to a method and system for intelligently generating a shield tunnel proximity construction plan. Background Art

[0002] Shield tunnel proximity construction refers to the construction method in which the newly built shield tunnel passes through or is adjacent to existing underground pipelines, transportation facilities, buildings and other underground structures during the shield tunnel construction process. This construction method has become very common in the context of increasingly tight urban underground space, but it also brings great technical challenges and risks, because it is necessary to control the impact of construction on existing structures to ensure construction safety and the stability of existing structures. When conducting proximity construction, some special technical measures are usually required, such as stratum reinforcement, grouting control, and construction parameter optimization, to reduce the disturbance of construction to adjacent structures and ensure the smooth progress of the construction process. With the large-scale promotion of subway shield tunnel construction, sometimes the newly built interval tunnel is close to existing buildings. Some existing buildings may have existed for a long time and the relevant design documents are missing. At this time, it is impossible to determine the foundation scope of the existing buildings, and thus it is impossible to determine the corresponding construction plan. Summary of the invention

[0003] In order to at least overcome the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a method and system for intelligently generating a shield tunnel proximity construction plan.

[0004] In a first aspect, an embodiment of the present application provides a method for intelligently generating a shield tunnel proximity construction plan, comprising: When the detailed underground structural parameters of the target adjacent building cannot be accurately obtained, the structural parameters of the upper surface of the target adjacent building and the geological survey parameters of the current position of the target adjacent building are obtained; the structural parameters include building type, building height, number of building floors and area occupied; Calculating stratum bearing parameters according to the geological survey parameters, and calculating the expected load of the target adjacent building according to the building type, building height and building number of floors; the stratum bearing parameters include soil layer parameters and soil layer depth of the pile end bearing layer, and friction parameters of the soil layer above the pile end bearing layer; Calculate the maximum foundation limit according to the geological survey parameters, the expected load and the occupied area; the maximum foundation limit is the maximum area where the foundation structure of the target adjacent building may exist underground; The proximity construction influence range of the shield interval tunnel is calculated, and the proximity construction plan is determined according to the intersection range of the proximity construction influence range and the maximum foundation limit.

[0005] When implementing the embodiment of the present application, in the case where the detailed parameters of the underground structure of the target adjacent building cannot be accurately obtained, it is necessary to first obtain the structural parameters above the surface that can be directly measured and obtained, as well as the geological survey data. The load of the building can be calculated based on the measured building type, building height and number of floors, and the geological survey parameters generally include the stratification of the strata and the parameters corresponding to each stratum, specifically including the side resistance and end resistance; in the embodiment of the present application, it is necessary to select the pile end bearing layer according to the end resistance, and use the side resistance of the soil layer above the pile end bearing layer as the friction parameter.

[0006] In the embodiment of the present application, after obtaining the geological survey parameters, expected load and occupied area, the maximum foundation limit can be calculated, that is, the horizontal range occupied by the foundation and the maximum possible depth of the pile under various extreme conditions; at the same time, it is necessary to calculate the proximity construction influence range of the shield interval tunnel, which is generally calculated based on the diameter of the shield tunnel. The corresponding proximity construction plan, such as grouting reinforcement, can be determined through the intersection between the proximity construction influence range and the maximum foundation limit. The embodiment of the present application uses the above-mentioned technical solution to carry out targeted design for working conditions where the foundation conditions of existing buildings cannot be accurately obtained, and uses the available ground data and geological survey data to estimate the range of possible foundation impact to the maximum extent, thereby achieving safe shield tunnel proximity construction when the foundation conditions are unknown, minimizing the impact of proximity construction on existing buildings, and is applicable to a variety of different types of existing buildings, with strong adaptability.

[0007] In a possible implementation, calculating the maximum foundation limit according to the geological survey parameters, the expected load, and the occupied area includes: According to the specification, the basic shortest distance allowed in the second direction in the occupied area is selected, and the basic width in the first direction is calculated as the maximum width according to the basic shortest distance; the first direction and the second direction are orthogonal, and the first direction and the second direction are horizontal; The modified load is formed by multiplying the expected load by the correction factor, and the density of the pile is adjusted to the minimum density required by the specification; the correction factor is the percentage of the expected increase in the load on the cap and the soil above the cap; Calculate the vertical friction force that each pile can provide in the soil layer above the pile end bearing layer according to the friction parameter, and calculate the friction load that all piles can provide in the soil layer above the pile end bearing layer according to the minimum density; Calculating the end bearing load that all piles can provide in the pile end bearing layer according to the soil layer parameters, and subtracting the friction load and the end bearing load from the correction load to form the end bearing friction load; The depth of the pile penetrating into the pile end bearing layer is calculated according to the end bearing friction load and the soil layer parameters, and the position of the pile end is taken as the maximum depth; The maximum basic limit is constructed with the first direction and the second direction both being the maximum width and the vertical depth being the maximum depth.

[0008] In one possible implementation, the calculation of the adjacent construction impact range of the shield tunnel section includes: Obtaining the diameter of the shield tunnel section, and multiplying the diameter by a preset value to form an impact diameter; Along the excavation direction of the shield section tunnel, with the center of the shield section tunnel as the origin and the influence diameter as the diameter, a cylindrical area is constructed to form the proximity construction influence range.

[0009] In a possible implementation, determining the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit includes: Calculate the overlap between the adjacent construction impact range and the maximum foundation limit, and calculate the ratio of the overlap to the volume of the maximum foundation limit as the impact area ratio; When the proportion of the affected area is greater than a preset first proportion, a first grouting parameter is set, and a first construction plan is generated for grouting the ground sleeve valve pipe in the overlapping range through the first grouting parameter; a second grouting parameter is set, and a porous grouting segment is arranged in the shield section tunnel within the adjacent construction influence range, and the porous grouting segment is grouting reinforced by the second grouting parameter when the shield section tunnel passes through the adjacent construction influence range.

[0010] In a possible implementation, determining the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit further includes: When the proportion of the affected area is less than or equal to the preset first proportion, a third grouting parameter is set, a porous grouting segment is set in the shield section tunnel within the influence range of the adjacent construction, and when the shield section tunnel passes through the influence range of the adjacent construction, the porous grouting segment is grouting reinforced by the third grouting parameter.

[0011] In a second aspect, the embodiment of the present application further provides a shield tunnel approach construction plan intelligent generation system, including: an acquisition unit configured to acquire, when the detailed parameters of the underground structure of the target adjacent building cannot be accurately acquired, the structural parameters of the upper surface of the target adjacent building and the geological survey parameters of the current position of the target adjacent building; the structural parameters include the building type, building height, number of building floors and area occupied; A load unit is configured to calculate stratum bearing parameters according to the geological survey parameters, and calculate the expected load of the target adjacent building according to the building type, building height and building number of floors; the stratum bearing parameters include soil layer parameters and soil layer depth of the pile end bearing layer, and friction parameters of the soil layer above the pile end bearing layer; A limit unit is configured to calculate a maximum foundation limit according to the geological survey parameters, the expected load and the occupied area; the maximum foundation limit is a maximum area where the foundation structure of the target adjacent building may exist underground; The generating unit is configured to calculate the proximity construction influence range of the shield interval tunnel, and determine the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit.

[0012] In a possible implementation, the limit unit is further configured to: According to the specification, the basic shortest distance allowed in the second direction in the occupied area is selected, and the basic width in the first direction is calculated as the maximum width according to the basic shortest distance; the first direction and the second direction are orthogonal, and the first direction and the second direction are horizontal; The modified load is formed by multiplying the expected load by the correction factor, and the density of the pile is adjusted to the minimum density required by the specification; the correction factor is the percentage of the expected increase in the load on the cap and the soil above the cap; Calculate the vertical friction force that each pile can provide in the soil layer above the pile end bearing layer according to the friction parameter, and calculate the friction load that all piles can provide in the soil layer above the pile end bearing layer according to the minimum density; Calculating the end bearing load that all piles can provide in the pile end bearing layer according to the soil layer parameters, and subtracting the friction load and the end bearing load from the correction load to form the end bearing friction load; The depth of the pile penetrating into the pile end bearing layer is calculated according to the end bearing friction load and the soil layer parameters, and the position of the pile end is taken as the maximum depth; The maximum basic limit is constructed with the first direction and the second direction both being the maximum width and the vertical depth being the maximum depth.

[0013] In a possible implementation, the generating unit is further configured to: Obtaining the diameter of the shield tunnel section, and multiplying the diameter by a preset value to form an impact diameter; Along the excavation direction of the shield section tunnel, with the center of the shield section tunnel as the origin and the influence diameter as the diameter, a cylindrical area is constructed to form the proximity construction influence range.

[0014] In a possible implementation, the generating unit is further configured to: Calculate the overlap between the adjacent construction impact range and the maximum foundation limit, and calculate the ratio of the overlap to the volume of the maximum foundation limit as the impact area ratio; When the proportion of the affected area is greater than a preset first proportion, a first grouting parameter is set, and a first construction plan is generated for grouting the ground sleeve valve pipe in the overlapping range through the first grouting parameter; a second grouting parameter is set, and a porous grouting segment is arranged in the shield section tunnel within the adjacent construction influence range, and the porous grouting segment is grouting reinforced by the second grouting parameter when the shield section tunnel passes through the adjacent construction influence range.

[0015] In a possible implementation, the generating unit is further configured to: When the proportion of the affected area is less than or equal to the preset first proportion, a third grouting parameter is set, a porous grouting segment is set in the shield section tunnel within the influence range of the adjacent construction, and when the shield section tunnel passes through the influence range of the adjacent construction, the porous grouting segment is grouting reinforced by the third grouting parameter.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a method and system for intelligently generating a shield tunnel proximity construction plan. The method and system are specifically designed for working conditions where the foundation conditions of existing buildings cannot be accurately obtained. The available ground data and geological survey data are used to estimate the range of possible impact on the foundation to the maximum extent, thereby achieving safe shield tunnel proximity construction when the foundation conditions are unknown, minimizing the impact of proximity construction on existing buildings, and being applicable to a variety of different existing building types with extremely strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 This is a schematic diagram of the steps of the method of the embodiment of the present application; Figure 2 This is a schematic diagram of the close construction of the shield tunnel section in the embodiment of the present application. DETAILED DESCRIPTION

[0018] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the embodiment of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0019] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0020] Please refer to Figure 1 , which is a flow chart of a method for intelligently generating a shield tunnel proximity construction plan provided in an embodiment of the present invention. The method for intelligently generating a shield tunnel proximity construction plan may specifically include the contents described in the following steps S1 to S4.

[0021] S1: When the detailed parameters of the underground structure of the target adjacent building cannot be accurately obtained, the structural parameters of the upper surface of the target adjacent building and the geological survey parameters of the current position of the target adjacent building are obtained; the structural parameters include building type, building height, number of building floors and area occupied; S2: Calculating stratum bearing parameters according to the geological survey parameters, and calculating the expected load of the target adjacent building according to the building type, building height and building number of floors; the stratum bearing parameters include soil layer parameters and soil layer depth of the pile end bearing layer, and friction parameters of the soil layer above the pile end bearing layer; S3: Calculate the maximum foundation limit according to the geological survey parameters, the expected load and the occupied area; the maximum foundation limit is the maximum area where the foundation structure of the target adjacent building may exist underground; S4: Calculate the proximity construction influence range of the shield interval tunnel, and determine the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit.

[0022] When implementing the embodiment of the present application, in the case where the detailed parameters of the underground structure of the target adjacent building cannot be accurately obtained, it is necessary to first obtain the structural parameters above the surface that can be directly measured and obtained, as well as the geological survey data. The load of the building can be calculated based on the measured building type, building height and number of floors, and the geological survey parameters generally include the stratification of the strata and the parameters corresponding to each stratum, specifically including the side resistance and end resistance; in the embodiment of the present application, it is necessary to select the pile end bearing layer according to the end resistance, and use the side resistance of the soil layer above the pile end bearing layer as the friction parameter.

[0023] In the embodiment of the present application, after obtaining the geological survey parameters, expected load and occupied area, the maximum foundation limit can be calculated, that is, the horizontal range occupied by the foundation and the maximum possible depth of the pile under various extreme conditions; at the same time, it is necessary to calculate the proximity construction influence range of the shield interval tunnel, which is generally calculated based on the diameter of the shield tunnel. The corresponding proximity construction plan, such as grouting reinforcement, can be determined through the intersection between the proximity construction influence range and the maximum foundation limit. The embodiment of the present application uses the above-mentioned technical solution to carry out targeted design for working conditions where the foundation conditions of existing buildings cannot be accurately obtained, and uses the available ground data and geological survey data to estimate the range of possible foundation impact to the maximum extent, thereby achieving safe shield tunnel proximity construction when the foundation conditions are unknown, minimizing the impact of proximity construction on existing buildings, and is applicable to a variety of different types of existing buildings, with strong adaptability.

[0024] In a possible implementation, calculating the maximum foundation limit according to the geological survey parameters, the expected load, and the occupied area includes: According to the specification, the basic shortest distance allowed in the second direction in the occupied area is selected, and the basic width in the first direction is calculated as the maximum width according to the basic shortest distance; the first direction and the second direction are orthogonal, and the first direction and the second direction are horizontal; The modified load is formed by multiplying the expected load by the correction factor, and the density of the pile is adjusted to the minimum density required by the specification; the correction factor is the percentage of the expected increase in the load on the cap and the soil above the cap; Calculate the vertical friction force that each pile can provide in the soil layer above the pile end bearing layer according to the friction parameter, and calculate the friction load that all piles can provide in the soil layer above the pile end bearing layer according to the minimum density; Calculating the end bearing load that all piles can provide in the pile end bearing layer according to the soil layer parameters, and subtracting the friction load and the end bearing load from the correction load to form the end bearing friction load; The depth of the pile penetrating into the pile end bearing layer is calculated according to the end bearing friction load and the soil layer parameters, and the position of the pile end is taken as the maximum depth; The maximum basic limit is constructed with the first direction and the second direction both being the maximum width and the vertical depth being the maximum depth.

[0025] When implementing the embodiment of the present application, it is necessary to first determine the first direction and the second direction, which are two mutually orthogonal and horizontal directions. For general civil buildings, the first direction also needs to be parallel or perpendicular to the side wall of the target adjacent building. For bridges, the first direction also needs to be parallel or perpendicular to the axis of the target adjacent building. When determining the shortest foundation distance allowed in the second direction, the selected specification needs to be selected according to the building type, and the selection method is generally based on the construction requirements; for example, for civil buildings, the shortest foundation distance can be selected to be the same as the distance in the second direction and the outer distance of the two farthest outer walls of the civil building; for bridges, it needs to be greater than the pier diameter and greater than the construction requirements of the specification. It should be understood that the construction requirements of the pedestal also need to meet the pile-related requirements. At this time, the minimum density can be obtained first, and then the range of the pedestal can be calculated based on the minimum density. At this time, in order for the pedestal to meet the impact requirements, the foundation width in the first direction can be calculated as the maximum width.

[0026] In the embodiment of the present application, the expected load needs to be corrected to a corrected load, and the correction method is to multiply by a correction coefficient to simplify the calculation. The purpose of the calculation is to correct the expected load to a corrected load that includes the cap and the corresponding soil, and at the same time obtain the pile density / number required by the structure. At this time, the vertical friction force that all piles can obtain in the soil layer above the pile end bearing layer and the end bearing load that all piles can provide in the pile end bearing layer are calculated. Subtracting the friction load and the end bearing load from the corrected load is the friction force that needs to be provided by the pile end bearing layer. At this time, the depth of the pile penetrating into the pile end bearing layer can be calculated as the maximum depth, and the maximum foundation limit can be constructed based on the maximum width and maximum depth.

[0027] In one possible implementation, the calculation of the adjacent construction impact range of the shield tunnel section includes: Obtaining the diameter of the shield tunnel section, and multiplying the diameter by a preset value to form an impact diameter; Along the excavation direction of the shield section tunnel, with the center of the shield section tunnel as the origin and the influence diameter as the diameter, a cylindrical area is constructed to form the proximity construction influence range.

[0028] In a possible implementation, determining the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit includes: Calculate the overlap between the adjacent construction impact range and the maximum foundation limit, and calculate the ratio of the overlap to the volume of the maximum foundation limit as the impact area ratio; When the proportion of the affected area is greater than a preset first proportion, a first grouting parameter is set, and a first construction plan is generated for grouting the ground sleeve valve pipe in the overlapping range through the first grouting parameter; a second grouting parameter is set, and a porous grouting segment is arranged in the shield section tunnel within the adjacent construction influence range, and the porous grouting segment is grouting reinforced by the second grouting parameter when the shield section tunnel passes through the adjacent construction influence range.

[0029] When implementing the embodiments of the present application, when setting the preliminary construction plan, the construction plan to be executed is determined by the proportion of the affected area, based on the influence range of the adjacent construction and the maximum foundation limit. When the proportion of the affected area is greater than the first proportion, it means that the impact of the adjacent construction may be large. At this time, it is necessary to reinforce the foundation of the existing building to facilitate the passage of the shield interval tunnel. The corresponding first grouting parameter belongs to the prior art, and the embodiments of the present application do not make any further limitations. When the shield interval tunnel passes through the adjacent area, it is also necessary to grout the surrounding rock through porous grouting segments to further ensure stability. Similarly, the determination of the corresponding second grouting parameter belongs to the prior art, and the embodiments of the present application do not make any further limitations.

[0030] In a possible implementation, determining the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit further includes: When the proportion of the affected area is less than or equal to the preset first proportion, a third grouting parameter is set, a porous grouting segment is set in the shield section tunnel within the influence range of the adjacent construction, and when the shield section tunnel passes through the influence range of the adjacent construction, the porous grouting segment is grouting reinforced by the third grouting parameter.

[0031] When the embodiment of the present application is implemented, when the proportion of the affected area is less than or equal to the first proportion, it means that the impact of the adjacent construction may be small. At this time, there is no need to reinforce the foundation of the existing building. When the shield interval tunnel passes through the adjacent area, grouting of the surrounding rock is achieved through porous grouting segments to further ensure stability. The determination of the corresponding third grouting parameter belongs to the prior art and is not limited in the embodiment of the present application.

[0032] For examples, see Figure 2, showing the situation of a shield tunnel section passing through bridge piles. The bridge deck is about 41.3m wide and 16.2m long. The bridge is equipped with two rows of piers. There are 8 piers in each row. According to the current data, the location and foundation form of the bridge piles are unknown. The distance between the center of the pier and the plane of the right line of the section is about 3.2m. The shield covering soil is about 11.9m, which is a first-level environmental risk source. After calculation by the embodiment of the present application, it can be determined that the side-penetrating section bridge pile foundation is grouting with ground sleeve valve pipes, and the side-penetrating section adopts porous grouting segments; grouting reinforcement is carried out in the hole, and reinforced segments are used.

[0033] Based on the same inventive concept, the embodiment of the present application also provides an intelligent generation system for a shield tunnel approach construction plan, including: an acquisition unit configured to acquire, when the detailed parameters of the underground structure of the target adjacent building cannot be accurately acquired, the structural parameters of the upper surface of the target adjacent building and the geological survey parameters of the current position of the target adjacent building; the structural parameters include the building type, building height, number of building floors and area occupied; A load unit is configured to calculate stratum bearing parameters according to the geological survey parameters, and calculate the expected load of the target adjacent building according to the building type, building height and building number of floors; the stratum bearing parameters include soil layer parameters and soil layer depth of the pile end bearing layer, and friction parameters of the soil layer above the pile end bearing layer; A limit unit is configured to calculate a maximum foundation limit according to the geological survey parameters, the expected load and the occupied area; the maximum foundation limit is a maximum area where the foundation structure of the target adjacent building may exist underground; The generating unit is configured to calculate the proximity construction influence range of the shield interval tunnel, and determine the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit.

[0034] In a possible implementation, the limit unit is further configured to: According to the specification, the basic shortest distance allowed in the second direction in the occupied area is selected, and the basic width in the first direction is calculated as the maximum width according to the basic shortest distance; the first direction and the second direction are orthogonal, and the first direction and the second direction are horizontal; The modified load is formed by multiplying the expected load by the correction factor, and the density of the pile is adjusted to the minimum density required by the specification; the correction factor is the percentage of the expected increase in the load on the cap and the soil above the cap; Calculate the vertical friction force that each pile can provide in the soil layer above the pile end bearing layer according to the friction parameter, and calculate the friction load that all piles can provide in the soil layer above the pile end bearing layer according to the minimum density; Calculating the end bearing load that all piles can provide in the pile end bearing layer according to the soil layer parameters, and subtracting the friction load and the end bearing load from the correction load to form the end bearing friction load; The depth of the pile penetrating into the pile end bearing layer is calculated according to the end bearing friction load and the soil layer parameters, and the position of the pile end is taken as the maximum depth; The maximum basic limit is constructed with the first direction and the second direction both being the maximum width and the vertical depth being the maximum depth.

[0035] In a possible implementation, the generating unit is further configured to: Obtaining the diameter of the shield tunnel section, and multiplying the diameter by a preset value to form an impact diameter; Along the excavation direction of the shield section tunnel, with the center of the shield section tunnel as the origin and the influence diameter as the diameter, a cylindrical area is constructed to form the proximity construction influence range.

[0036] In a possible implementation, the generating unit is further configured to: Calculate the overlap between the adjacent construction impact range and the maximum foundation limit, and calculate the ratio of the overlap to the volume of the maximum foundation limit as the impact area ratio; When the proportion of the affected area is greater than a preset first proportion, a first grouting parameter is set, and a first construction plan is generated for grouting the ground sleeve valve pipe in the overlapping range through the first grouting parameter; a second grouting parameter is set, and a porous grouting segment is arranged in the shield section tunnel within the adjacent construction influence range, and the porous grouting segment is grouting reinforced by the second grouting parameter when the shield section tunnel passes through the adjacent construction influence range.

[0037] In a possible implementation, the generating unit is further configured to: When the proportion of the affected area is less than or equal to the preset first proportion, a third grouting parameter is set, a porous grouting segment is set in the shield section tunnel within the influence range of the adjacent construction, and when the shield section tunnel passes through the influence range of the adjacent construction, the porous grouting segment is grouting reinforced by the third grouting parameter.

[0038] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0039] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0040] The units described as separate components may or may not be physically separated. As units, it is obvious that a person of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0041] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0042] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a grid device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0043] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for intelligently generating a shield tunnel approach construction plan, characterized in that: include: When the detailed underground structural parameters of the target adjacent building cannot be accurately obtained, the structural parameters of the upper surface of the target adjacent building and the geological survey parameters of the current position of the target adjacent building are obtained; the structural parameters include building type, building height, number of building floors and area occupied; Calculating stratum bearing parameters according to the geological survey parameters, and calculating the expected load of the target adjacent building according to the building type, building height and building number of floors; the stratum bearing parameters include soil layer parameters and soil layer depth of the pile end bearing layer, and friction parameters of the soil layer above the pile end bearing layer; Calculate the maximum foundation limit according to the geological survey parameters, the expected load and the occupied area; the maximum foundation limit is the maximum area where the foundation structure of the target adjacent building may exist underground; The proximity construction influence range of the shield interval tunnel is calculated, and the proximity construction plan is determined according to the intersection range of the proximity construction influence range and the maximum foundation limit.

2. The method for intelligently generating a shield tunnel approach construction plan according to claim 1, characterized in that: Calculating the maximum foundation limit according to the geological survey parameters, the expected load and the occupied area includes: According to the specification, the basic shortest distance allowed in the second direction in the occupied area is selected, and the basic width in the first direction is calculated as the maximum width according to the basic shortest distance; the first direction and the second direction are orthogonal, and the first direction and the second direction are horizontal; The modified load is formed by multiplying the expected load by the correction factor, and the density of the pile is adjusted to the minimum density required by the specification; the correction factor is the percentage of the expected increase in the load on the cap and the soil above the cap; Calculate the vertical friction force that each pile can provide in the soil layer above the pile end bearing layer according to the friction parameter, and calculate the friction load that all piles can provide in the soil layer above the pile end bearing layer according to the minimum density; Calculating the end bearing load that all piles can provide in the pile end bearing layer according to the soil layer parameters, and subtracting the friction load and the end bearing load from the correction load to form the end bearing friction load; The depth of the pile penetrating into the pile end bearing layer is calculated according to the end bearing friction load and the soil layer parameters, and the position of the pile end is taken as the maximum depth; The maximum basic limit is constructed with the first direction and the second direction both being the maximum width and the vertical depth being the maximum depth.

3. The method for intelligently generating a shield tunnel approach construction plan according to claim 1, characterized in that: The impact range of adjacent construction of shield tunnels is calculated as follows: Obtaining the diameter of the shield tunnel section, and multiplying the diameter by a preset value to form an impact diameter; Along the excavation direction of the shield section tunnel, with the center of the shield section tunnel as the origin and the influence diameter as the diameter, a cylindrical area is constructed to form the proximity construction influence range.

4. The method for intelligently generating a shield tunnel approach construction plan according to claim 1, characterized in that: Determining the proximity construction plan based on the intersection of the proximity construction impact range and the maximum foundation limit includes: Calculate the overlap between the adjacent construction impact range and the maximum foundation limit, and calculate the ratio of the overlap to the volume of the maximum foundation limit as the impact area ratio; When the proportion of the affected area is greater than a preset first proportion, a first grouting parameter is set, and a first construction plan is generated for grouting the ground sleeve valve pipe in the overlapping range through the first grouting parameter; a second grouting parameter is set, and a porous grouting segment is arranged in the shield section tunnel within the adjacent construction influence range, and the porous grouting segment is grouting reinforced by the second grouting parameter when the shield section tunnel passes through the adjacent construction influence range.

5. The method for intelligently generating a shield tunnel approach construction plan according to claim 4, characterized in that: Determining the proximity construction plan according to the intersection of the proximity construction impact range and the maximum foundation limit also includes: When the proportion of the affected area is less than or equal to the preset first proportion, a third grouting parameter is set, a porous grouting segment is set in the shield section tunnel within the influence range of the adjacent construction, and when the shield section tunnel passes through the influence range of the adjacent construction, the porous grouting segment is grouting reinforced by the third grouting parameter.

6. An intelligent generation system for shield tunnel approach construction plan, characterized in that: include: an acquisition unit configured to acquire, when the detailed parameters of the underground structure of the target adjacent building cannot be accurately acquired, the structural parameters of the upper surface of the target adjacent building and the geological survey parameters of the current position of the target adjacent building; the structural parameters include the building type, building height, number of building floors and area occupied; A load unit is configured to calculate stratum bearing parameters according to the geological survey parameters, and calculate the expected load of the target adjacent building according to the building type, building height and building number of floors; the stratum bearing parameters include soil layer parameters and soil layer depth of the pile end bearing layer, and friction parameters of the soil layer above the pile end bearing layer; A limit unit is configured to calculate a maximum foundation limit according to the geological survey parameters, the expected load and the occupied area; the maximum foundation limit is a maximum area where the foundation structure of the target adjacent building may exist underground; The generating unit is configured to calculate the proximity construction influence range of the shield interval tunnel, and determine the proximity construction plan according to the intersection range of the proximity construction influence range and the maximum foundation limit.

7. The intelligent generation system for shield tunnel approach construction plan according to claim 6 is characterized in that: The boundary unit is further configured to: According to the specification, the basic shortest distance allowed in the second direction in the occupied area is selected, and the basic width in the first direction is calculated as the maximum width according to the basic shortest distance; the first direction and the second direction are orthogonal, and the first direction and the second direction are horizontal; The modified load is formed by multiplying the expected load by the correction factor, and the density of the pile is adjusted to the minimum density required by the specification; the correction factor is the percentage of the expected increase in the load on the cap and the soil above the cap; Calculate the vertical friction force that each pile can provide in the soil layer above the pile end bearing layer according to the friction parameter, and calculate the friction load that all piles can provide in the soil layer above the pile end bearing layer according to the minimum density; Calculating the end bearing load that all piles can provide in the pile end bearing layer according to the soil layer parameters, and subtracting the friction load and the end bearing load from the correction load to form the end bearing friction load; The depth of the pile penetrating into the pile end bearing layer is calculated according to the end bearing friction load and the soil layer parameters, and the position of the pile end is taken as the maximum depth; The maximum basic limit is constructed with the first direction and the second direction both being the maximum width and the vertical depth being the maximum depth.

8. The intelligent generation system for shield tunnel approach construction plan according to claim 6 is characterized in that: The generating unit is further configured to: Obtaining the diameter of the shield tunnel section, and multiplying the diameter by a preset value to form an impact diameter; Along the excavation direction of the shield section tunnel, with the center of the shield section tunnel as the origin and the influence diameter as the diameter, a cylindrical area is constructed to form the proximity construction influence range.

9. The intelligent generation system for shield tunnel approach construction plan according to claim 6 is characterized in that: The generating unit is further configured to: Calculate the overlap between the adjacent construction impact range and the maximum foundation limit, and calculate the ratio of the overlap to the volume of the maximum foundation limit as the impact area ratio; When the proportion of the affected area is greater than a preset first proportion, a first grouting parameter is set, and a first construction plan is generated for grouting the ground sleeve valve pipe in the overlapping range through the first grouting parameter; a second grouting parameter is set, and a porous grouting segment is arranged in the shield section tunnel within the adjacent construction influence range, and the porous grouting segment is grouting reinforced by the second grouting parameter when the shield section tunnel passes through the adjacent construction influence range.

10. The intelligent generation system of shield tunnel approach construction plan according to claim 9, characterized in that: The generating unit is further configured to: When the proportion of the affected area is less than or equal to the preset first proportion, a third grouting parameter is set, a porous grouting segment is set in the shield section tunnel within the influence range of the adjacent construction, and when the shield section tunnel passes through the influence range of the adjacent construction, the porous grouting segment is grouting reinforced by the third grouting parameter.

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