A construction method for a rainwater pipeline trench and its settlement analysis method

Abstract

The present invention relates to a construction method for a rainwater pipeline trench and a settlement analysis method thereof. The pretreatment unit establishes a first settlement curve related to the preset trench settlement depth and time based on the sample information of the formation settlement in the same area. When the monitoring unit arranged at intervals on the rainwater pipeline regularly obtains the settlement information related to time that occurs in different sections of the rainwater pipeline following the trench, the processing unit establishes a second settlement curve related to the preset trench settlement depth and time in real time according to the collected settlement information. When there is a difference between the second settlement curve established by the processing unit and the first settlement curve received by it, the processing unit updates the second settlement curve by updating the preset trench settlement depth and judges the abnormal settlement situation of the rainwater pipeline over time, so that the display end can analyze the integrity of different sections of the rainwater pipeline according to the received first settlement curve, second settlement curve and abnormal settlement situation.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater pipeline construction and monitoring, and particularly to a construction method for a rainwater pipeline trench and a settlement analysis method therefor. Background Art

[0002] With global warming and the destruction of the natural environment, natural disasters such as unexpected heavy rainstorms occur in many regions, causing urban areas affected by rainstorms to often form large low-lying areas flooded with rainwater due to the drainage capacity limitation of the drainage system, resulting in adverse effects such as building water seepage. Therefore, in order to optimize the living environment of urban residents and avoid water accumulation in cities after rain, cities discharge rainwater through rainwater pipes or sewer pipes to surrounding rivers or send it to the rainwater drainage pipeline system of the flowing land. The construction of the drainage system requires digging trenches in the city for installing drainage pipelines. In the existing construction method for the trenches of drainage pipelines, the soil structure strength near the trenches is relatively small during construction, prone to settlement and collapse, and the construction safety is relatively low.

[0003] Existing rainwater pipelines are usually used to connect multiple ground drainage troughs in cities or on roads, and can converge rainwater and sewage and transport them to designated storage spaces or sewage ditches. However, existing rainwater pipelines usually form a drainage network by directly excavating trenches and then sequentially connecting and burying rainwater pipes. They are prone to deformation and damage due to geological settlement and surface heavy pressure, resulting in the actual drainage volume of the pipeline being unable to reach the set standard drainage volume. Due to the reduction of the water passage space in the pipeline, the rainwater treatment capacity is reduced, leading to insufficient drainage treatment capacity in urban building areas and road areas during rainstorms, and there are risks of water accumulation and water seepage. Therefore, when the rainwater pipeline and the installed trench have abnormal settlement or are damaged by compression and collapse, it is necessary to replace the damaged part of the pipeline to ensure the water treatment capacity of the pipeline. However, the rainwater pipeline is buried in the stratum, and it is impossible to directly determine the specific location of the damage due to the reduction of the drainage volume, which greatly limits the replacement efficiency. In addition, it is impossible to predict and analyze the settlement situation of existing rainwater pipelines, and it is impossible to carry out early maintenance on rainwater pipelines during the rainy season when the predicted precipitation and rainfall intensity are large. It may cause the rainwater pipelines and trenches with a certain degree of abnormal settlement to collapse due to a large amount of rainwater infiltrating into the stratum during the rainy season, resulting in large-area water accumulation in the low-lying area connected to the rainwater pipeline and even backflow into surrounding buildings, causing risks to personnel and property losses.

[0004] Chinese Patent CN112196059A discloses a construction method for municipal rainwater pipelines, including the following steps: 1. Dig a shallow trench and pour in mud; 2. Drive sheet piles along the shallow trench to form a continuous retaining structure; 3. Excavate the trench and construct the waling and support columns; 4. Excavate the trench to a predetermined depth; 5. Install the grouting pipe and pour the trench cushion; 6. Install the pipeline; 7. Backfill the trench and remove the waling and support columns; 8. Pull out the sheet piles and grout through the grouting pipe. It can be seen that in the present invention, before driving the sheet piles, a shallow trench is pre-dug and mud is poured in to lubricate the sheet piles, thereby reducing the friction between the sheet piles and the surrounding soil during driving and the agitation of the surrounding soil. In addition, by setting the grouting pipe, the vacuum effect caused by pulling out the sheet piles and the resulting soil loss are effectively prevented, thereby reducing the deformation range caused by soil loss. Although this patent can improve the overall stability of the pipeline trench structure to a certain extent, enabling the rainwater pipeline to ensure the stability of the soil at the bottom and side walls of the trench during installation, it can only ensure the accuracy of the pipeline position and the stability of placement during the installation process, and cannot keep the spliced rainwater pipelines in an effective connection state and installation position all the time as the formation settles during use. In addition, when the ground surface corresponding to the rainwater pipeline is under heavy pressure, the trench may also collapse, and even the pipeline may be deformed or damaged. The above-mentioned adverse conditions cannot be monitored for the currently installed rainwater pipelines, nor can the pipeline wear be predicted in advance over time. Therefore, targeted on-site maintenance cannot be carried out before the rainy season, which may lead to the collapse of the drainage system and a large amount of water accumulation in low-lying areas, causing inevitable damage to buildings.

[0005] Therefore, in order to effectively monitor and predict whether the working state of urban rainwater pipelines is good, a monitoring system is needed that can increase the monitoring of the health status of pipeline trenches during pipeline trench construction, so as to be able to regularly monitor the actual situation of the pipelines of rainwater pipelines and analyze at any time according to the settlement of the formation and the settlement of rainwater pipelines. A rainwater pipeline trench settlement analysis method, by judging whether the rainwater pipeline will have adverse deformation under external force or settlement force, facilitates relevant staff to take timely maintenance and pipeline replacement measures for abnormal deformation or damage, and avoids the drainage capacity of the rainwater pipeline being affected, resulting in the collapse of the drainage system or a decrease in drainage capacity.

[0006] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, although the inventor studied a large number of documents and patents when making this invention, due to space limitations, not all details and contents were listed in detail. However, this does not mean that this invention does not possess the features of these prior arts. On the contrary, this invention already possesses all the features of the prior arts, and the applicant reserves the right to add relevant prior arts in the background art. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the technical solution of the present invention provides a rainwater pipeline trench settlement warning method that can analyze the settlement speed and the influence degree of spatial deformation on the structure of the installed rainwater pipeline trench and can issue a warning based on the analysis results. It includes at least a monitoring unit, a preprocessing unit, and a processing unit. The preprocessing unit establishes a first settlement curve related to the preset trench settlement depth and time based on the sample information of the settlement of the same regional stratum. When the monitoring unit arranged at intervals on the rainwater pipeline regularly obtains the time-related settlement information of different sections of the rainwater pipeline following the trench, the processing unit establishes a second settlement curve related to the preset trench settlement depth and time in real time according to the collected settlement information. When there is a difference between the second settlement curve established by the processing unit and the first settlement curve received by it, the processing unit updates the second settlement curve by updating the preset trench settlement depth and judges the abnormal settlement situation of the rainwater pipeline over time, so that the display end can obtain the integrity of different sections of the rainwater pipeline according to the received first settlement curve, second settlement curve, and trench abnormal settlement situation. Its advantage is that, compared with the prior art that can support and protect the rainwater pipeline by improving the stability of the trench structure during the excavation process of the buried rainwater pipeline and its trench, this application can predict the settlement depth and deformation of the specific positions of the rainwater pipeline and its installation trench that synchronize with the stratum or are damaged under heavy pressure over time during use, and can accurately judge the specific position of the damaged rainwater pipeline according to the monitored information, which is convenient for construction personnel to replace the rainwater pipeline in the specified area in a timely and accurate manner according to the obtained warning information and damage information, avoiding the inability to effectively drain water in the drainage system when the rainy season comes. In addition, this application monitors the settlement of the rainwater pipeline and its accommodating trench by using the time when the preset settlement depth occurs as the sampling time period, which is beneficial to more timely monitoring of the abnormal settlement of the stratum where the rainwater pipeline is located. In addition, when the stratum is stable and does not undergo slow settlement or no settlement due to external forces, the monitoring device can reduce the frequency and amount of data transmission. During the rainy season, when other underground construction is carried out in the area where the device is located, and when the ground surface is continuously under heavy pressure, etc., resulting in abnormal settlement of the stratum, the monitoring unit can send the settlement data and time data to the processing unit, reducing the amount of data generated during the monitoring process and reducing the data delay phenomenon during data transmission, enabling the data analysis module to quickly respond to abnormal data and thus issue warning information in a timely manner

[0008] According to a preferred embodiment, when there is a difference between the second settlement curve established by the processing unit and the first settlement curve, the processing unit can control the monitoring unit to feedback the time period of the set depth of trench settlement it monitors in a way that reduces the preset depth of trench settlement it sets, so that the monitoring unit can shorten the sampling period when the trench settlement is abnormal, and the processing unit can obtain a second settlement curve with dense data points. The advantage is that the monitoring module of the device can selectively shorten the time period of monitoring information feedback in a way that reduces the preset depth of trench settlement at the time points of abnormal settlement and rapid change of settlement depth according to the change of the formation settlement rate characterized by the first settlement curve and the second settlement curve, so as to obtain a data set with better accuracy and more data, and thus can more accurately and effectively control the stability of the rainwater pipeline and the trench it accommodates.

[0009] According to a preferred embodiment, in the case where the second settlement curve established by the processing unit continuously overlaps with the first settlement curve, the processing unit can also control the monitoring unit to feedback the time period of the set depth of trench settlement it detects in a way that increases the preset depth of trench settlement, so that the monitoring unit can extend the sampling period when the trench is normally settling. The advantage is that by reducing the amount of monitoring data uploaded under normal use, expected settlement or no settlement and other abnormal situations of the pipeline, the possible data delay can be reduced.

[0010] According to a preferred embodiment, the processing unit compares the periodic change difference value representing the trench settlement degree of the corresponding parts in the second settlement curve and the first settlement curve based on the change rate of the real-time sampling time period, and issues a warning message through the display end when the periodic change difference value is greater than the periodic difference threshold.

[0011] According to a preferred embodiment, the preprocessing unit extracts the corresponding dynamic fluctuation trajectory information of trench settlement based on the pre-input geological parameters, settlement trough parameters, and construction sequence information, and extracts the first settlement curve corresponding to the preset trench settlement depth based on the dynamic fluctuation trajectory information of trench settlement; and the preprocessing unit can also update the sampling time period corresponding to the preset trench settlement depth in response to the preset trench settlement depth update information and / or the construction process update information within the trench spatial area sent by the processing unit, so as to synchronously update the first settlement curve information.

[0012] According to a preferred embodiment, the processing unit also adjusts the prediction of the second settlement curve established by it according to the change rate of the sampling time period associated with the first settlement curve established by the preprocessing unit. Wherein, when the preset trench settlement depth characterized by the first settlement curve changes, causing the associated sampling time period to change, the processing unit controls the monitoring unit to monitor the same trench settlement depth in the same period and collect the corresponding sampling time period, so as to judge the settlement abnormality of the trench by comparing the sampling time period differences belonging to the same time period.

[0013] According to a preferred embodiment, when there is a difference between the second settlement curve and the first settlement curve for the first time, the processing unit reduces and updates the preset settlement depth once, and compares the updated first settlement curve with the second settlement curve. When there is an Nth difference between the second settlement curve and the first settlement curve, if the period change difference value corresponding to the current preset settlement depth is greater than the period difference threshold, the processing unit sends a warning message to at least one of the display terminals.

[0014] This application also provides a construction method for a rainwater pipeline trench, including the following steps:

[0015] Perform ground measurement and marking according to the pre-designed rainwater pipeline coordinate data to determine the excavation position of the trench, and determine the depth and width to be excavated at different marked positions, and obtain the distribution of the existing underground pipelines in the area corresponding to the excavation position of the trench based on the existing underground pipeline data;

[0016] Selectively set a support structure adapted to the trench depth in different excavation areas according to the measurement and marking information of the trench to be excavated;

[0017] Excavate the soil in the trench area along the ground marking, process the foundation and the trench wall of the excavated trench, and review the depth and width of the excavated trench;

[0018] Build a rainwater pipeline protection structure in the excavated trench and install the rainwater pipeline orderly along the excavation direction of the trench, and set a monitoring unit capable of monitoring the settlement of the pipeline in the trench at the connection position of two adjacent sections of the rainwater pipeline.

[0019] According to a preferred embodiment, the soil excavation in the trench is carried out by combining mechanical excavation and manual excavation. Wherein, when the mechanical excavation creates a rough trench contour, the manual excavation method is further used to complete the correction of the trench size.

[0020] According to a preferred embodiment, the foundation treatment includes grouting and strengthening the soil under the bottom of the trench; the trench wall treatment can adopt slope reinforcement to level and stabilize the trench wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic diagram of the working logic of a preferred embodiment of a construction method for a rainwater pipeline trench and its settlement analysis method according to the present invention;

[0022] Figure 2 FIG. is a schematic diagram of a steel sheet pile support structure of a construction method for a rainwater pipeline trench and its settlement analysis method according to the present invention;

[0023] Figure 3 FIG. is a schematic diagram of a rainwater pipeline protection structure of a construction method for a rainwater pipeline trench and its settlement analysis method according to the present invention.

[0024] LIST OF REFERENCE NUMERALS

[0025] 1: Monitoring unit; 2: Pretreatment unit; 3: Processing unit; 4: Display end; 5: Steel sheet pile support; 6: Trench frame; 7: Support assembly; 8: Insertion assembly; 51: Steel sheet pile; 52: Longitudinal purlin; 53: Inner support rod; 54: Bracket; 55: Tie bar; 61: Trench side plate; 62: Trench top plate; 71: Arc bottom plate; 72: Fixing unit; 531: Steel plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following is a detailed description with reference to the drawings.

[0027] Embodiment 1

[0028] The present application provides a settlement analysis method for a rainwater pipeline trench, which can also be a method capable of monitoring and warning the deformation of a rainwater pipeline and its accommodating trench.

[0029] According to Figure 1A specific implementation manner shown includes at least a monitoring unit 1, a preprocessing unit 2, a processing unit 3, and a display terminal 4. The monitoring unit 1 can respectively establish data connections with the preprocessing unit 2 and the processing unit 3, and the monitoring unit 1 can adjust the set value of its feedback period according to the processing result of the processing unit 3. The processing result of the preprocessing unit 2 can be sent to the processing unit 3 for further processing and analysis and sent to the display terminal 4 for the display of the first settlement curve established by it. The processing unit 3 can send the second settlement curve established by it and the real-time comparison analysis result to the display terminal 4 for display, and give an early warning through the display terminal 4 in case of an abnormality. The preprocessing unit 2 establishes a first settlement curve related to the preset trench settlement depth and time based on the sample information of the same-region formation settlement. When the monitoring units 1 arranged at intervals on the rainwater pipeline regularly obtain the settlement information related to time that occurs in different sections of the rainwater pipeline following the trench, the processing unit 3 establishes a real-time second settlement curve related to the preset trench settlement depth and time based on the collected settlement information. When there is a difference between the second settlement curve established by the processing unit 3 and the first settlement curve received by it, the processing unit 3 updates the second settlement curve by updating the preset trench settlement depth and judges whether there is a possibility of abnormal settlement of the rainwater pipeline over time, so that the display terminal 4 can obtain the integrity of different sections of the rainwater pipeline according to the received first settlement curve, second settlement curve, and trench abnormal settlement situation, and reasonably predict the state of the rainwater pipeline and its accommodating trench in a subsequent certain period of time. When it is judged that there are risks of abnormal settlement, deformation, and collapse of the rainwater pipeline and its accommodating trench, an early warning can be given in time through the display terminal 4, so that the construction personnel can carry out maintenance of the designated area and replacement of the rainwater pipeline in advance.

[0030] Preferably, the monitoring unit 1 may include a first monitoring unit 11 for monitoring the settlement of the trench bottom, a second monitoring unit 12 for detecting the settlement of the rainwater pipeline, a third monitoring unit 13 for monitoring the compression deformation of the rainwater pipeline, and a fourth monitoring unit 14 for detecting the settlement parameters of the ground surface. Preferably, the first detection unit 11 can be arranged at the support position where the rainwater pipeline protection structure is built, that is, the end connection position where the rainwater pipe joints are spliced together. Preferably, the second monitoring unit 12 is installed on one side of the rainwater pipe joint end face close to the trench bottom, and the third monitoring unit 13 is installed on one side of the rainwater pipe joint end face close to the ground surface. The second monitoring unit 12 can obtain the settlement parameters with the first detection unit 11 to establish the first settlement curve and the second settlement curve as the actual settlement parameters of the rainwater pipeline and the accommodating trench. The third monitoring unit 13 is for monitoring the depth difference between it and the second monitoring unit 12. When the depth difference is less than the set diameter of the rainwater pipe, it analyzes whether the pipeline is slightly deformed, moderately deformed or even collapsed. Preferably, the fourth monitoring unit 14 is arranged on the geological surface of the construction section for monitoring the settlement parameters of the ground surface. The settlement parameters in the present invention include longitudinal settlement parameters, horizontal settlement parameters and three-dimensional settlement parameters in the construction direction. That is, the settlement parameters in the present invention are settlement parameters in a three-dimensional space.

[0031] Preferably, both the preprocessing unit 2 and the processing unit 3 can be one or several of a processor, a server, a cloud server, and an application specific integrated circuit.

[0032] Preferably, the display end 4 can be one or several of a computer, a monitor, a portable mobile terminal, and a smart device. The portable mobile terminal is, for example, one or several of a portable computer, a smart watch, smart glasses, a smart bracelet, and a tablet computer.

[0033] Preferably, the preset trench settlement depth is the settlement depth set in advance. Among them, the settlement information related to time is recorded with the preset settlement depth of the trench as the driving event. When the time taken for the trench to settle by each preset settlement depth is the sampling time period. When the settlement speed of the trench changes, the sampling time period corresponding to a preset settlement time changes. The ratio of the sampling time period to the preset trench settlement depth is the curve slope of the correlation curve of the preset settlement depth and time. The larger the curve slope, the longer the sampling time period corresponding to a preset settlement time of the trench, the slower the trench settlement speed, and the higher the construction safety level. On the contrary, the smaller the curve slope, the shorter the sampling time period corresponding to a preset settlement time of the settlement tank, the faster the settlement speed of the settlement tank, the lower the construction safety level, and the higher the danger level. Preferably, the preset settlement depth for sampling is set in such a way that the sampling time period is shortened as the depth increases. The larger the settlement depth value of the trench, the smaller the preset settlement depth value, thereby shortening the sampling time period. The greater the depth of the trench, the higher the likelihood of an accident. Shortening the sampling time period is conducive to increasing the time density of monitoring the trench, so as to timely detect abnormal settlement of the trench. During use, the monitoring personnel can monitor the change in the settlement speed of the trench according to the change in the sampling time period during the construction process, and analyze whether the settlement of the trench is abnormal by monitoring the change in the slope of the correlation curve. In the case of abnormal settlement, the sampling time for the preset settlement depth changes, and the curve slope is abnormal. Therefore, the present invention adjusts the preset settlement depth in a timely manner through the abnormal curve slope, thereby further monitoring the change in the slope of the correlation curve, timely determining the settlement depth of the trench and giving an early warning.

[0034] Preferably, the settlement analysis method of the present application is mainly to monitor the health status of the rainwater pipeline for a long time after the completion of the rainwater pipeline laying, especially for the main rainwater pipelines in areas with frequent geological movement changes, soft geology, long surface load-bearing time, and around and directly below buildings. The purpose is to effectively ensure that the rainwater pipeline can always maintain a good drainage performance, so as to transfer the accumulated water in the low-lying areas around the city in time when there is an abnormal large amount of rainfall. In addition, through the settlement and deformation monitoring of the rainwater pipeline, when an abnormal situation occurs, the specified rainwater pipe joints can be inspected, maintained or replaced in time to ensure the effectiveness of the urban drainage system. The setting of the monitoring unit 1 can help the construction personnel quickly and effectively locate the position of the pipe joints with abnormal conditions such as deformation and collapse, greatly reducing the time required for maintenance and ensuring the normal operation of the urban drainage system. In addition, the settlement data collected by the monitoring unit 1 can also be summarized and sorted for monitoring the settlement of the entire rainwater pipeline system and its affiliated areas, helping the construction personnel to take targeted support and protection measures based on the collected monitoring data when carrying out underground engineering construction in different areas. Preferably, the establishment of the first settlement curve and the second settlement curve and the monitoring data collected by the monitoring unit 1 can also help the construction personnel to verify the status of the entire rainwater pipeline before the rainy season and dry season come, and can make a reasonable prediction of the pipeline condition within a certain period of time. Thus, when there are abnormal settlements and deformations in the buried position of the rainwater pipeline, a maintenance plan can be made in advance to ensure that the drainage volume of the pipeline always remains stable during subsequent use.

[0035] Preferably, when there is long-term rainfall and / or long-term gravity rolling, it usually causes changes in the formation or a certain degree of collapse of the underground structure, which will lead to the destruction of the underground pipeline system and even cause personal injuries. Therefore, the ability to monitor the settlement and deformation of the pipeline area and make reasonable predictions in time can assist the construction personnel to take effective protection measures or repairs in time before damage and collapse. To a certain extent, it can reduce losses and ensure the effective use of the rainwater pipeline, and avoid the collapse of the entire pipeline system.

[0036] Preferably, when there is a difference between the second settlement curve established by the processing unit 3 and the first settlement curve, the processing unit 3 can control the monitoring unit 1 to feedback the time period of the set trench settlement depth it monitors in a way that reduces the preset trench settlement depth it sets, so that the monitoring unit 1 can shorten the sampling period when the trench settlement is abnormal, and the processing unit 3 can obtain a second settlement curve with dense data points. Preferably, when the second settlement curve established by the processing unit 3 continuously overlaps with the first settlement curve, the processing unit 3 can also control the monitoring unit 1 to feedback the time period of the set trench settlement depth it detects in a way that increases the preset trench settlement depth, so that the monitoring unit 1 can extend the sampling period when the trench settles normally. By setting the sampling period to be variably adjusted according to the actual settlement speed, data transmission can be reduced during the stable period and the acquisition frequency can be increased during the changing period, thus effectively improving the accuracy and effectiveness of prediction.

[0037] Preferably, the processing unit 3 compares the periodic change difference value representing the trench settlement degree of the corresponding parts in the second settlement curve and the first settlement curve based on the change rate of the real-time sampling time period, and issues a warning message through the display terminal 4 when the periodic change difference value is greater than the periodic difference threshold.

[0038] Preferably, the preprocessing unit 2 extracts the corresponding dynamic fluctuation trajectory information of the bottom of the settlement trough based on the pre-input geological parameters, settlement trough parameters, and construction sequence information, and extracts the first settlement curve corresponding to the preset trench settlement depth based on the dynamic fluctuation trajectory information of the bottom of the settlement trough. The preprocessing unit 2 can also update the sampling time period corresponding to the preset trench settlement depth in response to the preset trench settlement depth update information and / or the construction process update information within the trench spatial area sent by the processing unit 3, so as to synchronously update the first settlement curve information. Preferably, the processing unit 3 also adjusts the prediction of the second settlement curve it establishes according to the change rate of the sampling time period associated with the first settlement curve established by the preprocessing unit 2. When the preset trench settlement depth represented by the first settlement curve changes and the associated sampling time period changes, the processing unit 3 controls the monitoring unit 1 to monitor the same trench settlement depth in the same period and collect the corresponding sampling time period, so as to judge the trench settlement abnormality by comparing the sampling time period differences belonging to the same time period.

[0039] Preferably, when there is a difference between the second settlement curve and the first settlement curve for the first time, the processing unit 3 reduces and updates the preset settlement depth once, compares the updated first settlement curve with the second settlement curve, and when there is an Nth difference between the second settlement curve and the first settlement curve, if the periodic change difference value corresponding to the current preset settlement depth is greater than the periodic difference threshold, the processing unit 3 issues a warning message to at least one display terminal 4.

[0040] Example 2

[0041] This application also provides a construction method for a rainwater pipeline trench, including the following steps:

[0042] S1: Conduct ground measurement markings according to the pre-designed rainwater pipeline coordinate data, determine the excavation position of the trench, and determine the depth and width to be excavated at different marked positions, and obtain the distribution of existing underground pipelines in the area corresponding to the excavation position of the trench based on the existing underground pipeline data;

[0043] S2: Selectively set a support structure adapted to the trench depth in different excavation areas according to the measurement marking information of the trench to be excavated;

[0044] S3: Excavate the soil in the trench area along the ground markings, treat the foundation and the trench wall of the excavated trench, and recheck the depth and width of the excavated trench;

[0045] S4: Build a rainwater pipeline protection structure in the excavated trench and install rainwater pipes orderly along the excavation direction of the trench, and set a monitoring unit 1 at the connection position of two adjacent sections of rainwater pipes to monitor the settlement of the pipes in the trench.

[0046] Preferably, the acquisition of the distribution of existing underground pipelines in the area to be excavated is to avoid damaging other pipelines during the excavation of the rainwater pipeline trench to be installed, which has an adverse impact on the lives of citizens. Therefore, when conducting measurement markings on the ground in the area to be excavated, it is also necessary to consider the depth and position of the existing pipelines underground in this area. If there are overlapping existing pipelines or existing pipelines in the shallow soil layer above the depth to be excavated, it is necessary to re-plan the excavation construction plan or adjust the construction process.

[0047] Preferably, mechanical excavation and manual excavation are combined for the soil excavation in the trench during construction. In the case where mechanical excavation creates a general trench contour, manual excavation is further used to complete the correction of the trench dimensions. Preferably, the foundation treatment includes grouting and strengthening the soil under the bottom of the trench. The trench wall treatment can adopt slope reinforcement to level and stabilize the trench wall.

[0048] Preferably, the selection of the support structure is set according to the depth of the trench to be excavated. Among them, when the excavation depth is less than 1.5m, no support is required; when the excavation depth is greater than 1.5m and less than 2m, simple sheet pile support is used; when the excavation depth is greater than 2m and less than 3.5m, slope + simple sheet pile support is used; when the excavation depth is greater than 3.5m, steel sheet pile support 5 is used.

[0049] Preferably, when building the steel sheet pile support structure, the steel sheet pile support 5 can directly use Larssen steel sheet piles. Such asFigure 2 As shown in Figure 2 , the steel sheet pile support 5 includes steel sheet piles 51, longitudinal purlins 52, internal support rods 53 and corbels 54. Specifically, steel sheet piles 51 are respectively driven into both side walls of the trench. The driving depth of the steel sheet piles 51 is 9 m. And at both sides of the steel sheet piles 51 at a distance of h = 1 m from the upper opening of the pipeline trench, a longitudinal purlin 52 is respectively installed along the length direction of the pipeline trench. The longitudinal purlin 52 is composed of double-ply H-shaped steel. An internal support rod 53 is installed every 4 m between the two longitudinal purlins 52. Both ends of each internal support rod 53 are welded to the longitudinal purlin 52 through a square steel plate 531, and a corbel 54 is respectively arranged between the bottom of each steel plate 531 and the steel sheet pile 51. Preferably, a steel horse 55 with a height of 1 m and a length of 1.5 m is respectively installed on both sides of the upper opening of the pipeline trench.

[0050] Preferably, the mechanical excavation operation can be carried out only after the construction of the selected support structure is completed in the marked area. When excavating the rainwater pipeline trench, it is necessary to slope according to the actual soil conditions in different areas and ensure the stability of the trench wall; adopt layered excavation, and the layered excavation depth is determined according to the mechanical performance; when using machinery to excavate the pipeline trench, the pipeline trench is measured while being excavated. When the excavation depth is close to the pipeline burial depth, a soil layer of 20 - 30 cm is left at the bottom of the trench for manual excavation to avoid over-excavation of the trench, disturbing the soil under the trench and damaging the original bearing capacity of the soil. At the same time, a drainage ditch with a size of 0.3 m × 0.3 m is first excavated on one side of the pipeline trench, and a pit with a depth of 0.5 m is excavated downstream of the drainage ditch. The equipped submersible pump is placed in the pit for real-time pumping to ensure the dry state of the bottom of the pipeline trench and guarantee the safety of the construction personnel and the pipeline construction quality; when excavating the pipeline trench, if over-excavation and disturbance occur, natural graded gravel with a particle size of 10 - 15 mm or gravel with a particle size of 5 - 40 mm should be used for replacement filling and leveled and tamped; the excavated soil of the pipeline trench should be cleared as it is excavated and evenly stacked more than 0.8 m away from the side line of the upper opening of the pipeline trench, and the stacking height does not exceed 1.5 m. Preferably, after the trench excavation operation is completed, the foundation of the pipeline trench needs to be leveled and solidified. At this time, a catch ditch with a depth and width of 300 mm should be excavated at a position close to one side wall at the bottom of the trench, and the side wall and bottom of the catch ditch should be built with C20 plain cement.

[0051] Preferably, after the curing of the bottom and walls of the trench is completed, a rainwater pipeline protection structure is erected in the trench, and the rainwater pipeline is installed while the rainwater pipeline protection structure is being erected. Preferably, the rainwater pipeline protection structure includes a detachable and assembled trench frame body 6, a support assembly 7, and a plug-in assembly 8. Before placing the rainwater pipeline into the pre-excavated trench, it is necessary to assemble the trench frame body 6 that can protect the rainwater pipeline, adjustably install the pipeline on the support assembly 7, and finally complete the assembly operation between the trench frame body 6 and the support assembly 7. The trench frame body 6 can be assembled with the support assembly 7 through the plug-in assembly 8 to form a trench chamber that can accommodate the pipeline, and the radial periphery of the trench chamber is defined by the plate bodies of the trench frame body 6 and the support base assembly 7, so that the trench chamber can be separated from the soil layer around the pre-excavated trench. The components of the support assembly 7 that are recessed into the interior of the trench chamber can fix the pipeline placed in the trench chamber, so that the pipeline can be fixedly installed in the pre-excavated trench and is suspended and supported in the trench chamber by the support assembly 7, avoiding the pipeline directly pressing on the trench frame body 6, which may cause the trench frame body 6 to be easily deformed and damaged, etc.

[0052] As Figure 3 shown, the trench frame body 6 includes trench side plates 61 and a trench top plate 62 that are arranged in the pre-excavated trench and form the trench chamber. At the axial lower ends of two relatively arranged trench side plates 61, a support assembly 7 is also installed that can suspend and support the pipeline in the trench chamber. The trench side plates 61 are connected to the edges of two relatively arranged plate bodies of the support assembly 7 through the plug-in assembly 8, thereby restricting a trench chamber with a certain width and height above the support assembly 7. Preferably, a trench top plate 62 is also spliced and installed on the side of the trench side plate 61 away from the support assembly 7, so that the top of the trench chamber is blocked, thereby forming a trench chamber with a closed side and placed horizontally.

[0053] Preferably, the support assembly 7 is spliced with the trench frame body 6 in a manner that can close the bottom of the trench chamber. The support assembly 7 includes an arc-shaped bottom plate 71 that can be partially recessed into the trench chamber defined by the trench side plates 61 and the trench top plate 62, and a fixing unit 72 arranged on the arc-shaped bottom plate 71 for fixing the pipeline. Preferably, the arc-shaped bottom plate 71 installed on the surface of the trench side plate 61 is recessed into the interior of the trench chamber constructed by the trench frame body 6, so that the upwardly curved arc-shaped bottom plate 71 can have a greater supporting force relative to a flat plate surface, ensuring that it can better and more stably support the rainwater pipeline with a larger volume and weight. The arc-shaped bottom plate 71 can be spliced with two relatively arranged trench side plates 61 to form a trench chamber with a closed bottom surface. The trench side plates 61 and the arc-shaped bottom plate 71 are assembled through the plug-in assembly 8. The plug-in assembly 8 is assembled in a manner that can detachably snap the two opposite side edges of the arc-shaped bottom plate 71 onto the plate bodies of the two relatively arranged trench side plates 61.

[0054] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and within the protection scope of the present invention. Those skilled in the art should understand that the description and drawings of the present invention are illustrative and do not constitute a limitation on the claims. The protection scope of the present invention is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional way and should not be understood as being necessarily provided. Therefore, the applicant reserves the right to waive or delete the relevant preferred features at any time.

Claims

1. A method for analyzing the settlement of a rainwater pipeline trench, which at least includes a monitoring unit (1), a preprocessing unit (2) and a processing unit (3). Characterized in that The preprocessing unit (2) establishes a first settlement curve related to the preset trench settlement depth and time based on the sample information of the same regional formation settlement. The preprocessing unit (2) extracts the corresponding dynamic fluctuation trajectory information of the bottom of the settlement trough based on the pre-input geological parameters, settlement trough parameters and construction sequence information, and extracts the first settlement curve corresponding to the preset trench settlement depth based on the dynamic fluctuation trajectory information of the bottom of the settlement trough. When the monitoring unit (1) arranged at intervals on the rainwater pipeline regularly obtains the settlement information related to time that different sections of the rainwater pipeline follow the trench, the processing unit (3) establishes a second settlement curve related to the preset trench settlement depth and time in real time according to the collected settlement information. When there is a difference between the second settlement curve established by the processing unit (3) and the first settlement curve received by it, the processing unit (3) updates the second settlement curve by updating the preset trench settlement depth and judges the abnormal settlement situation of the rainwater pipeline over time, so that the display end (4) can obtain the integrity of different sections of the rainwater pipeline according to the received first settlement curve, second settlement curve and trench abnormal settlement situation.

2. The method for analyzing the settlement of a rainwater pipeline trench according to claim 1. Characterized in that When there is a difference between the second settlement curve established by the processing unit (3) and the first settlement curve, the processing unit (3) can control the monitoring unit (1) to feedback the time period of the trench settlement setting depth it monitors in a way that reduces the preset trench settlement depth it sets, so that the monitoring unit (1) can shorten the sampling period when the trench settlement is abnormal, and the processing unit (3) can obtain a second settlement curve with dense data points.

3. The method for analyzing the settlement of a rainwater pipeline trench according to claim 2. Characterized in that When the second settlement curve established by the processing unit (3) overlaps continuously with the first settlement curve, the processing unit (3) can also control the monitoring unit (1) to feedback the time period of the trench settlement setting depth it detects in a way that increases the preset trench settlement depth, so that the monitoring unit (1) can extend the sampling period when the trench is normally settled.

4. The method for analyzing the settlement of a rainwater pipeline trench according to claim 2. Characterized in that The processing unit (3) compares the periodic change difference value representing the trench settlement degree of the corresponding parts in the second settlement curve and the first settlement curve based on the change rate of the real-time sampling time period, and issues a warning message through the display end (4) when the periodic change difference value is greater than the periodic difference threshold.

5. The method for analyzing the settlement of a rainwater pipeline trench according to claim 2. Characterized in that The preprocessing unit (2) can also update the sampling time period corresponding to the preset trench settlement depth in response to the preset trench settlement depth update information sent by the processing unit (3) and / or the construction process update information within the trench space area, so as to synchronously update the first settlement curve information.

6. The method for analyzing the settlement of a rainwater pipeline trench according to claim 5, wherein, the processing unit (3) also adjusts the prediction of the second settlement curve established by it according to the change rate of the sampling time period associated with the first settlement curve established by the preprocessing unit (2), where when the preset trench settlement depth represented by the first settlement curve changes and causes the associated sampling time period to change, the processing unit (3) controls the monitoring unit (1) to monitor the same trench settlement depth in the same period and collect the corresponding sampling time period, so as to judge the settlement abnormality of the trench by comparing the sampling time period differences belonging to the same time period.

7. The method for analyzing the settlement of a rainwater pipeline trench according to any one of the foregoing claims, wherein, when there is a difference between the second settlement curve and the first settlement curve for the first time, the processing unit (3) reduces and updates the preset settlement depth once, and compares the updated first settlement curve with the second settlement curve. when there is an Nth difference between the second settlement curve and the first settlement curve, if the period change difference value corresponding to the current preset settlement depth is greater than the period difference threshold, the processing unit (3) sends a warning message to at least one of the display terminals (4).

8. A construction method for a rainwater pipeline trench, wherein, it includes the following steps: Conduct ground measurement markings according to the pre-designed rainwater pipeline coordinate data, determine the excavation position of the trench, and determine the depth and width to be excavated at different marked positions, and obtain the distribution of the existing underground pipelines in the area corresponding to the excavation position of the trench according to the existing underground pipeline data; Selectively set a support structure adapted to the trench depth in different excavation areas according to the measurement marking information of the trench to be excavated; Excavate the soil in the trench area along the ground markings, process the foundation and the trench wall of the excavated trench, and review the depth and width of the excavated trench; Build a rainwater pipeline protection structure in the excavated trench and install the rainwater pipes orderly along the excavation direction of the trench, and set a monitoring unit (1) capable of monitoring the abnormal settlement of the pipeline in the trench at the connection position of two adjacent sections of rainwater pipes, and the abnormal settlement situation is obtained by executing the method for analyzing the settlement of a rainwater pipeline trench according to any one of claims 1 to 7.

9. The construction method for a rainwater pipeline trench according to claim 8, wherein, the soil excavation in the trench is carried out by combining mechanical excavation and manual excavation. Among them, when the mechanical excavation creates a rough trench contour, the manual excavation method is further used to complete the correction of the trench dimensions.

10. The construction method for a rainwater pipeline trench according to claim 8, wherein, The foundation treatment includes grouting and strengthening the soil under the bottom of the trench; The treatment of the trench wall adopts the method of slope reinforcement to level and stabilize the trench wall.

Images