A damage assessment system and method for adjacent structures based on foundation pit excavation

Abstract

The present invention belongs to the technical field of construction assessment. The present invention provides a damage assessment system and method for structures adjacent to foundation pit excavation, including: by comparing and analyzing the positions of historical damage points and the positions of initially set detection points, judging whether it is necessary to optimize the detection points initially set; if necessary, increasing the detection points according to a damage ranking table, which is conducive to accurately assessing the damage of the structure by setting reasonable detection points; performing quantitative analysis and deformation degree analysis on rapid deformation detection points to obtain deformation damage values, judging the degree of damage risk of structures surrounding the foundation pit; based on processing and analyzing repeated damage points to obtain damage repetition values, judging whether the source of the damage risk of the structures surrounding the foundation pit is caused by historical damage, which is conducive to realizing the analysis and assessment of the degree of damage risk of the structures surrounding the foundation pit, and judging the source of the damage risk of the structures surrounding the foundation pit, so as to facilitate the repair and optimization of subsequent damage detection points.

Description

Technical Field

[0001] The invention belongs to the technical field of construction assessment, and in particular to a system and method for assessing damage of adjacent structures based on foundation pit excavation. Background Art

[0002] In actual construction, foundation pit excavation is a common construction step and an important foundation for building construction. However, during the foundation pit excavation, various influences of the excavation construction will cause damage to the adjacent structures around the foundation pit. If the damage risk assessment cannot be carried out in time, it will be detrimental to the subsequent construction. Therefore, it is of great significance to study a damage assessment system and method for adjacent structures based on foundation pit excavation.

[0003] In the prior art, detection points are usually set up during foundation pit excavation for damage assessment during the foundation pit excavation process. However, in the prior art, the setting of detection points may be based on experience or preliminary assessment, and lacks in-depth analysis of historical damage data. For example, in practice, historical damage points have experienced multiple historical damages, resulting in weak structural strength at their locations, and are often more susceptible to re-damage. If the detection points are set only based on experience or preliminary assessments without considering the damage conditions of the historical damage points, the accuracy of the structural damage assessment will be affected. Secondly, in the prior art, there may be a lack of clear judgment basis for the source of structural damage risk around the foundation pit and no targeted analysis. For example, it is not considered that the structural damage risk around the foundation pit is caused by historical damage. If there is a lack of targeted analysis of the source of damage risk, it is impossible to carry out targeted optimization of the repair strategy for subsequent damage points.

[0004] To this end, the present invention provides a system and method for evaluating damage of adjacent structures based on foundation pit excavation. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a method for assessing damage of adjacent structures based on foundation pit excavation, comprising:

[0007] By comparing and analyzing the locations of historical damage points and the locations of the initially set detection points, it is determined whether the initially set detection points need to be optimized;

[0008] If necessary, the damage ranking table is determined by processing and analyzing the historical damage information, and additional detection points are set up to finally complete the setting of detection points;

[0009] By comparing and analyzing the initial position of the detection point and the real-time position of the detection point at the end of the foundation pit excavation period, the detection point is marked to obtain the rapid deformation detection point;

[0010] Perform quantitative analysis on the rapid deformation detection points and deformation degree 4 analysis to obtain the deformation damage value, and judge the damage risk degree of the surrounding structure of the foundation pit according to the deformation damage value;

[0011] If the damage risk level of the structure around the foundation pit is high, extract the rapid deformation detection points, and compare them with the historical damage points to obtain repeated damage points. The repeated damage points are processed and analyzed to obtain damage repetition values. Based on the damage repetition values, determine whether the source of the damage risk of the structure around the foundation pit is caused by historical damage.

[0012] As a further technical solution of the present invention, the process of judging whether it is necessary to optimize the initially set detection points is as follows:

[0013] Based on any historical damage point;

[0014] Obtain the location of the historical damage point and perform coincidence analysis with the location of the initially set detection point;

[0015] If the location of a historical damage point coincides with the location of any initially set detection point, the historical damage point is marked as a coincident damage point;

[0016] If the location of the historical damage point does not overlap with the locations of all the initially set detection points, the historical damage point is marked as a non-overlapping damage point;

[0017] The overlapped damage points and non-overlapped damage points are processed and analyzed to obtain the damage overlap ratio SC and the damage deviation ratio SP. The formula is: The detection coincidence value CH is obtained, where s1 and s2 are both preset proportional coefficients;

[0018] Compare the detection coincidence value CH with the detection coincidence threshold;

[0019] If the detection coincidence value is greater than the detection coincidence threshold, it means that there is no need to optimize the initially set detection points;

[0020] If the detection overlap value is less than or equal to the detection overlap threshold, it means that the initially set detection points need to be optimized.

[0021] As a further technical solution of the present invention, the damage overlap ratio SC and the damage deviation ratio SP are obtained in the following manner:

[0022] Count the number of overlapping damage points among the damage points, and compare them with the number of historical damage points to obtain the damage overlap ratio, which is marked as SC.

[0023] Based on the non-overlapping damage points, the distance between the non-overlapping damage points and the nearest adjacent initially set detection points is obtained to obtain the approach distance of the non-overlapping damage points. The approach distances of all non-overlapping damage points are summed and averaged to obtain the approach distance mean. The approach distance mean is compared with the approach distance reference value to obtain the damage deviation ratio, which is marked as SP.

[0024] As a further technical solution of the present invention, the damage ranking table is determined in the following manner:

[0025] The damage times of non-coincident damage points are obtained through historical damage information, and the damage times of all non-coincident damage points are summed up to obtain the total number of historical damage times;

[0026] Based on any non-coincident damage point;

[0027] The damage times of non-coinciding damage points are processed by ratio with the total number of historical damage times to obtain the proportion of damage times of non-coinciding damage points;

[0028] Obtain the approach distance of the non-overlapping damage point, and perform ratio processing with the approach distance reference value to obtain the distance deviation ratio of the non-overlapping damage point;

[0029] The proportion of the number of damages of non-coinciding damage points and the distance deviation ratio are summed to obtain a priority addition value, and the non-coinciding damage points are sorted from large to small according to the priority addition value to obtain a damage sorting table;

[0030] The process of adding and setting detection points according to the damage sorting table is as follows: in the damage sorting table, non-overlapping damage points are selected in turn, new detection points are added and set at the positions of the selected non-overlapping damage points, and after setting, the detection overlap value is recalculated until the detection overlap value is greater than the detection overlap threshold, then the selection is stopped, and the setting of the detection points is finally completed.

[0031] As a further technical solution of the present invention, the method for obtaining the rapid deformation detection point is:

[0032] According to the initial position and real-time position of the detection point, the distance between the initial position and the real-time position of the detection point is measured to obtain the position deformation distance, and the position deformation distance is ratio-processed with the duration corresponding to the foundation pit excavation stage cycle to obtain the position deformation rate;

[0033] If the position deformation rate of the detection point is greater than the deformation rate threshold, the detection point is marked as a fast deformation detection point.

[0034] As a further technical solution of the present invention, the deformation damage value is obtained in the following manner:

[0035] Count the number of rapid deformation detection points and perform ratio processing with the total number of detection points to obtain the rapid deformation number ratio;

[0036] Perform difference processing on the position deformation distance corresponding to the rapid deformation detection point and the deformation distance threshold to obtain the position deformation distance difference, sum and average the position deformation distance differences of all rapid deformation detection points to obtain the position deformation distance average difference, perform ratio processing on the position deformation distance average difference and the deformation distance threshold to obtain the rapid deformation degree value;

[0037] The damage risk value is obtained by summing the rapid deformation quantity ratio and the rapid deformation degree value.

[0038] As a further technical solution of the present invention, the process of judging the damage risk degree of the surrounding structure of the foundation pit according to the deformation damage value is specifically as follows:

[0039] comparing the injury risk value to an injury risk threshold;

[0040] If the damage risk value is greater than the damage risk threshold, it means that the damage risk level of the surrounding structures of the foundation pit is high;

[0041] If the damage risk value is less than or equal to the damage risk threshold, it means that the damage risk level of the structure surrounding the foundation pit is low.

[0042] As a further technical solution of the present invention, the damage repetition value is obtained by:

[0043] Extract fast deformation detection points based on any fast deformation detection point;

[0044] If the rapid deformation detection point is a historical damage point, the rapid deformation detection point is marked as a repeated damage point;

[0045] The repeated damage points were processed and analyzed to obtain the repeated number ratio CF and the damage fluctuation value BD;

[0046] By formula: The damage repetition value SF is obtained, wherein a1 and a2 are both preset proportional coefficients;

[0047] The process of judging whether the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage according to the damage repetition value is as follows:

[0048] The damage repetition value SF is compared with the damage repetition threshold;

[0049] If the damage repetition value SF is greater than the damage repetition threshold, it means that the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage;

[0050] If the damage repetition value SF is less than or equal to the damage repetition threshold, it means that the source of the damage risk of the structure around the foundation pit is not caused by historical damage.

[0051] As a further technical solution of the present invention, the repetition number ratio CF and the damage fluctuation value BD are obtained in the following manner:

[0052] Count the number of repeated damage points and compare them with the number of rapid deformation detection points to obtain the repeated number ratio, which is marked as CF.

[0053] The position deformation distance difference and the number of damages of repeated damage points are obtained, and the position deformation distance difference and the number of damages are ratio processed to obtain the damage change ratio. The damage change ratios of all repeated damage points are integrated into a damage change group, and the variance value of the damage change group is calculated to obtain the damage fluctuation value, which is marked as BD.

[0054] A damage assessment system for adjacent structures based on foundation pit excavation, comprising:

[0055] Optimization analysis module: By comparing and analyzing the locations of historical damage points and the locations of initially set detection points, it is determined whether the initially set detection points need to be optimized;

[0056] Optimization setting module: If the initially set detection points need to be optimized, the damage ranking table is determined by processing and analyzing the historical damage information, and the detection points are added and set, and finally the detection points are set;

[0057] Detection marking module: By comparing and analyzing the initial position of the detection point and the real-time position of the detection point at the end of the foundation pit excavation period, the detection point is marked to obtain the rapid deformation detection point;

[0058] Damage assessment module: Quantitative analysis of rapid deformation detection points and deformation degree analysis are performed to obtain deformation damage values, and the damage risk degree of the surrounding structures of the foundation pit is determined based on the deformation damage values;

[0059] Damage source analysis module: If the damage risk level of the structure around the foundation pit is high, extract the rapid deformation detection points, and compare them with the historical damage points to obtain repeated damage points. The repeated damage points are processed and analyzed to obtain damage repetition values. Based on the damage repetition values, it is determined whether the source of the damage risk of the structure around the foundation pit is caused by historical damage.

[0060] The beneficial effects of the present invention are as follows:

[0061] 1. By comparing and analyzing the positions of historical damage points and the positions of initially set detection points, it is determined whether the initially set detection points need to be optimized. If necessary, the damage ranking table is determined by processing and analyzing the historical damage information, and additional detection points are set according to the damage ranking table to finally complete the setting of detection points. The present invention analyzes the positional overlap between historical damage points and initially set detection points to determine whether new detection points need to be added, thereby improving the rationality of detection point setting, and is conducive to accurately assessing structural damage by setting reasonable detection points.

[0062] 2. By comparing and analyzing the initial position and real-time position of the detection point, the detection point is marked to obtain the rapid deformation detection point, and the rapid deformation detection point is quantitatively analyzed and the deformation degree is analyzed to obtain the deformation damage value. The damage risk degree of the structure surrounding the foundation pit is judged according to the deformation damage value. The present invention realizes the damage assessment of the structure surrounding the foundation pit by analyzing the change rate between the initial position of the detection point and the real-time position after the foundation pit excavation.

[0063] 3. By comparing the positions of rapid deformation detection points and historical damage points, repeated damage points are obtained. Based on the processing and analysis of repeated damage points, damage repetition values ​​are obtained. According to the damage repetition values, it is judged whether the source of the damage risk of the structure around the foundation pit is caused by historical damage. This is conducive to the analysis and evaluation of the degree of damage risk of the structure around the foundation pit, and at the same time, it is conducive to judging the source of the damage risk of the structure around the foundation pit, which is convenient for the subsequent repair and optimization of damage detection points. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The present invention will be further described below in conjunction with the accompanying drawings.

[0065] Figure 1 It is a flowchart of the steps of a method for damage assessment of adjacent structures based on foundation pit excavation according to an embodiment of the present invention;

[0066] Figure 2 It is a flowchart of a damage assessment system for adjacent structures based on foundation pit excavation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0067] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0068] Example 1

[0069] like Figure 1 As shown, a method for evaluating damage of adjacent structures based on foundation pit excavation according to an embodiment of the present invention includes:

[0070] Step 1: Extract the historical damage information of the structure around the foundation pit from the historical damage report, obtain the historical damage point location of the structure around the foundation pit through the historical damage information, and compare and analyze the historical damage point location and the initial detection point location to determine whether the initial detection point needs to be optimized;

[0071] The historical damage information includes, but is not limited to, the location of the historical damage point, the number of damages at the historical damage point, and other information;

[0072] It should be noted that the initially set detection points are evenly distributed on the surrounding structures of the foundation pit. The positions of the initially set detection points are set in advance by those skilled in the art according to the assessment requirements, and the even distribution of the initial damage points is conducive to a comprehensive and comprehensive damage assessment of the surrounding structures of the foundation pit.

[0073] Based on any historical damage point;

[0074] Obtain the location of the historical damage point and perform coincidence analysis with the location of the initially set detection point;

[0075] If the location of a historical damage point coincides with the location of any initially set detection point, the historical damage point is marked as a coincident damage point;

[0076] If the location of the historical damage point does not overlap with the locations of all the initially set detection points, the historical damage point is marked as a non-overlapping damage point;

[0077] Count the number of overlapping damage points among the damage points, and compare them with the number of historical damage points to obtain the damage overlap ratio, which is marked as SC.

[0078] Based on the non-overlapping damage points, the distance between the non-overlapping damage points and the nearest initial detection points is obtained to obtain the proximity distance of the non-overlapping damage points. The proximity distances of all non-overlapping damage points are summed and averaged to obtain the mean proximity distance. The mean proximity distance is compared with the reference proximity distance to obtain the damage deviation ratio, which is marked as SP.

[0079] Wherein, the approach distance reference value is the distance between adjacent initially set detection points;

[0080] It should be noted that, since the initially set detection points are evenly distributed, the distances between adjacent initially set detection points are equal;

[0081] The obtained damage overlap ratio SC and damage deviation ratio SP are processed by data, and the formula is: The detection coincidence value CH is obtained, where s1 and s2 are both preset proportional coefficients;

[0082] In some embodiments, the detection coincidence value CH is compared with a detection coincidence threshold;

[0083] If the detection coincidence value is greater than the detection coincidence threshold, it means that there is no need to optimize the initially set detection points;

[0084] If the detection coincidence value is less than or equal to the detection coincidence threshold, it means that the initially set detection points need to be optimized;

[0085] Step 2: If the initially set detection points need to be optimized, the damage ranking table is determined by processing and analyzing the historical damage information, and additional detection points are set according to the damage ranking table, and finally the setting of the detection points is completed;

[0086] Specifically, the damage times of non-coinciding damage points are obtained through historical damage information, and the damage times of all non-coinciding damage points are summed up to obtain the total number of historical damage times;

[0087] Based on any non-coinciding damage point, the damage times of the non-coinciding damage point are ratioed to the total number of historical damage times to obtain the proportion of the damage times of the non-coinciding damage point;

[0088] Obtain the approach distance of the non-overlapping damage point, and perform ratio processing with the approach distance reference value to obtain the distance deviation ratio of the non-overlapping damage point;

[0089] The proportion of the number of damages of non-coinciding damage points and the distance deviation ratio are summed to obtain a priority addition value, and the non-coinciding damage points are sorted from large to small according to the priority addition value to obtain a damage sorting table;

[0090] It should be noted that the priority addition value indicates the non-overlapping degree between the current non-overlapping damage point and the initially set detection point and the historical damage degree. Non-overlapping damage points with large priority addition values ​​are preferentially selected for setting new detection points, which is conducive to improving the rationality and efficiency of detection point setting, thereby improving the accuracy of structural damage assessment;

[0091] In the damage sorting table, non-overlapping damage points are selected in sequence, and new detection points are added and set at the positions of the selected non-overlapping damage points. After setting, the detection overlap value is recalculated until the detection overlap value is greater than the detection overlap threshold. Then, the selection is stopped, and the setting of the detection points is finally completed.

[0092] The technical solution of the embodiment of the present invention is: by comparing and analyzing the positions of historical damage points and the positions of initially set detection points, it is determined whether the initially set detection points need to be optimized. If necessary, the damage ranking table is determined by processing and analyzing the historical damage information, and the detection points are added according to the damage ranking table to finally complete the setting of the detection points. The present invention improves the rationality of the detection point setting by analyzing the positional overlap between the historical damage points and the initially set detection points, and is conducive to accurately assessing the damage of the structure by setting reasonable detection points.

[0093] Example 2

[0094] like Figure 1 As shown, based on Example 1, a method for assessing damage of adjacent structures based on foundation pit excavation according to an embodiment of the present invention includes:

[0095] Step 3: Record the initial position of the set detection point, and collect the real-time position of the detection point at the end of the foundation pit excavation period. By comparing and analyzing the initial position and real-time position of the detection point, mark the detection point to obtain the rapid deformation detection point;

[0096] Specifically, according to the initial position and real-time position of the detection point, the distance between the initial position and the real-time position of the detection point is measured to obtain the position deformation distance, and the position deformation distance is ratio-processed with the duration corresponding to the foundation pit excavation stage cycle to obtain the position deformation rate;

[0097] Compare the position deformation rate of the detection point with the deformation rate threshold;

[0098] If the position deformation rate of the detection point is greater than the deformation rate threshold, the detection point is marked as a fast deformation detection point;

[0099] If the position deformation rate of the detection point is less than or equal to the deformation rate threshold, the detection point is marked as a non-rapid deformation detection point;

[0100] It should be noted that the deformation rate threshold is an empirical value set by a person skilled in the art according to the period of foundation pit excavation, and is used to determine the rate of change of the position of the detection point, wherein the period of foundation pit excavation is designed by a person skilled in the art according to the construction schedule;

[0101] Step 4: Quantitative analysis and deformation degree analysis of rapid deformation detection points are performed to obtain deformation damage values, and the damage risk degree of the surrounding structures of the foundation pit is determined according to the deformation damage values;

[0102] Count the number of rapid deformation detection points and perform ratio processing with the total number of detection points to obtain the rapid deformation number ratio;

[0103] Perform difference processing on the position deformation distance corresponding to the rapid deformation detection point and the deformation distance threshold to obtain the position deformation distance difference, sum and average the position deformation distance differences of all rapid deformation detection points to obtain the position deformation distance average difference, perform ratio processing on the position deformation distance average difference and the deformation distance threshold to obtain the rapid deformation degree value;

[0104] The rapid deformation quantity ratio and the rapid deformation degree value are summed to obtain the damage risk value;

[0105] comparing the injury risk value to an injury risk threshold;

[0106] If the damage risk value is greater than the damage risk threshold, it means that the damage risk level of the surrounding structures of the foundation pit is high;

[0107] If the damage risk value is less than or equal to the damage risk threshold, it means that the damage risk level of the surrounding structures of the foundation pit is low;

[0108] The technical solution of the embodiment of the present invention is: by comparing and analyzing the initial position and real-time position of the detection point, the detection point is marked to obtain the rapid deformation detection point, the rapid deformation detection point is quantitatively analyzed and the deformation degree is analyzed to obtain the deformation damage value, and the damage risk degree of the structure surrounding the foundation pit is judged according to the deformation damage value. The present invention realizes the damage assessment of the structure surrounding the foundation pit by analyzing the change rate between the initial position of the detection point and the real-time position after the foundation pit is excavated.

[0109] Example 3

[0110] like Figure 1 As shown, based on Example 1 and Example 2, a method for assessing damage of adjacent structures based on foundation pit excavation according to an embodiment of the present invention includes:

[0111] Step 5: Based on the high degree of damage risk of the structure around the foundation pit, extract the rapid deformation detection points, and compare them with the historical damage points to obtain repeated damage points. Based on the processing and analysis of the repeated damage points, obtain the damage repetition value. According to the damage repetition value, determine whether the source of the damage risk of the structure around the foundation pit is caused by historical damage;

[0112] Specifically, extracting fast deformation detection points, based on any fast deformation detection point;

[0113] If the rapid deformation detection point is a historical damage point, the rapid deformation detection point is marked as a repeated damage point;

[0114] If the rapid deformation detection point is located at a historical damage point, the rapid deformation detection point will be marked as a non-repeated damage point;

[0115] Count the number of repeated damage points and compare them with the number of rapid deformation detection points to obtain the repeated number ratio, which is marked as CF.

[0116] Obtain the position deformation distance difference and the number of damages of repeated damage points, perform ratio processing on the position deformation distance difference and the number of damages to obtain the damage change ratio, integrate the damage change ratios of all repeated damage points into a damage change group, calculate the variance value of the damage change group, obtain the damage fluctuation value, and mark it as BD;

[0117] The obtained repetition number ratio CF and damage fluctuation value BD are processed by the formula: The damage repetition value SF is obtained, wherein a1 and a2 are both preset proportional coefficients;

[0118] The damage repetition value SF is compared with the damage repetition threshold;

[0119] If the damage repetition value SF is greater than the damage repetition threshold, it means that the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage;

[0120] If the damage repetition value SF is less than or equal to the damage repetition threshold, it means that the source of the damage risk of the surrounding structure of the foundation pit is not caused by historical damage;

[0121] The technical solution of the embodiment of the present invention is: by comparing the positions of rapid deformation detection points and historical damage points, repeated damage points are obtained, and based on the processing and analysis of the repeated damage points, damage repetition values ​​are obtained. According to the damage repetition values, it is judged whether the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage. This is conducive to realizing the analysis and evaluation of the degree of damage risk of the surrounding structure of the foundation pit, and at the same time, judging the source of the damage risk of the surrounding structure of the foundation pit is convenient for the subsequent repair optimization of the damage detection points.

[0122] Example 4

[0123] like Figure 2 As shown, a damage assessment system for adjacent structures based on foundation pit excavation according to an embodiment of the present invention includes:

[0124] Optimization analysis module: extracts historical damage information of the structure around the foundation pit from the historical damage report, obtains the location of historical damage points of the structure around the foundation pit through the historical damage information, and compares and analyzes the location of the historical damage points and the location of the initially set detection points to determine whether the initially set detection points need to be optimized;

[0125] Optimization setting module: If the initially set detection points need to be optimized, the damage ranking table is determined by processing and analyzing the historical damage information, and the detection points are added and set according to the damage ranking table, and finally the detection points are set;

[0126] Detection marking module: records the initial position of the set detection point, and collects the real-time position of the detection point at the end of the foundation pit excavation period. By comparing and analyzing the initial position and real-time position of the detection point, the detection point is marked to obtain the rapid deformation detection point;

[0127] Damage assessment module: Quantitative analysis and deformation degree analysis of rapid deformation detection points are performed to obtain deformation damage values, and the damage risk degree of the surrounding structures of the foundation pit is determined based on the deformation damage values;

[0128] Damage source analysis module: If the damage risk level of the structure around the foundation pit is high, extract the rapid deformation detection points, and compare them with the historical damage points to obtain repeated damage points. Based on the processing and analysis of the repeated damage points, obtain the damage repetition value. According to the damage repetition value, determine whether the source of the damage risk of the structure around the foundation pit is caused by historical damage.

[0129] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for damage assessment of adjacent structures based on foundation pit excavation, characterized in that: include: By comparing and analyzing the locations of historical damage points and the locations of the initially set detection points, it is determined whether the initially set detection points need to be optimized; The process of determining whether the initially set detection points need to be optimized is as follows: Based on any historical damage point; Obtain the location of the historical damage point and perform coincidence analysis with the location of the initially set detection point; If the location of a historical damage point coincides with the location of any initially set detection point, the historical damage point is marked as a coincident damage point; If the location of the historical damage point does not overlap with the locations of all the initially set detection points, the historical damage point is marked as a non-overlapping damage point; The overlapped damage points and non-overlapped damage points are processed and analyzed to obtain the damage overlap ratio SC and the damage deviation ratio SP. The formula is: The detection coincidence value CH is obtained, where s1 and s2 are both preset proportional coefficients; Compare the detection coincidence value CH with the detection coincidence threshold; If the detection coincidence value is greater than the detection coincidence threshold, it means that there is no need to optimize the initially set detection points; If the detection coincidence value is less than or equal to the detection coincidence threshold, it means that the initially set detection points need to be optimized; If necessary, the damage ranking table is determined by processing and analyzing the historical damage information, and additional detection points are set up to finally complete the setting of detection points; By comparing and analyzing the initial position of the detection point and the real-time position of the detection point at the end of the foundation pit excavation period, the detection point is marked to obtain the rapid deformation detection point; Conduct quantitative analysis and deformation degree analysis on rapid deformation detection points to obtain deformation damage values, and judge the damage risk degree of the surrounding structures of the foundation pit based on the deformation damage values; If the damage risk of the structure around the foundation pit is high, extract the rapid deformation detection points and compare them with the historical damage points to obtain repeated damage points. Then process and analyze the repeated damage points to obtain the damage repetition value. According to the damage repetition value, determine whether the source of the damage risk of the structure around the foundation pit is caused by historical damage. The damage repetition value is obtained in the following manner: Extract fast deformation detection points based on any fast deformation detection point; If the rapid deformation detection point is a historical damage point, the rapid deformation detection point is marked as a repeated damage point; The repeated damage points were processed and analyzed to obtain the repeated number ratio CF and the damage fluctuation value BD; By formula: The damage repetition value SF is obtained, wherein a1 and a2 are both preset proportional coefficients; The process of judging whether the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage according to the damage repetition value is as follows: The damage repetition value SF is compared with the damage repetition threshold; If the damage repetition value SF is greater than the damage repetition threshold, it means that the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage; If the damage repetition value SF is less than or equal to the damage repetition threshold, it means that the source of the damage risk of the structure around the foundation pit is not caused by historical damage.

2. The damage assessment method for adjacent structures based on foundation pit excavation according to claim 1 is characterized in that: The damage overlap ratio SC and the damage deviation ratio SP are obtained as follows: Count the number of overlapping damage points among the damage points, and compare them with the number of historical damage points to obtain the damage overlap ratio, which is marked as SC. Based on the non-overlapping damage points, the distance between the non-overlapping damage points and the nearest adjacent initially set detection points is obtained to obtain the approach distance of the non-overlapping damage points. The approach distances of all non-overlapping damage points are summed and averaged to obtain the approach distance mean. The approach distance mean is compared with the approach distance reference value to obtain the damage deviation ratio, which is marked as SP.

3. The damage assessment method for adjacent structures based on foundation pit excavation according to claim 1 is characterized in that: The damage ranking table is determined as follows: The damage times of non-coincident damage points are obtained through historical damage information, and the damage times of all non-coincident damage points are summed up to obtain the total number of historical damage times; Based on any non-coincident damage point; The damage times of non-coinciding damage points are processed by ratio with the total number of historical damage times to obtain the proportion of damage times of non-coinciding damage points. Obtain the approach distance of the non-coincident damage point, and perform ratio processing with the approach distance reference value to obtain the distance deviation ratio of the non-coincident damage point; The proportion of the number of damages of non-coinciding damage points and the distance deviation ratio are summed to obtain a priority addition value, and the non-coinciding damage points are sorted from large to small according to the priority addition value to obtain a damage sorting table; The process of adding and setting detection points is as follows: in the damage sorting table, non-overlapping damage points are selected in turn, new detection points are added and set at the positions of the selected non-overlapping damage points, and after setting, the detection overlap value is recalculated until the detection overlap value is greater than the detection overlap threshold, then the selection is stopped, and the setting of the detection points is finally completed.

4. The damage assessment method for adjacent structures based on foundation pit excavation according to claim 1 is characterized in that: The method for obtaining the rapid deformation detection point is as follows: According to the initial position and real-time position of the detection point, the distance between the initial position and the real-time position of the detection point is measured to obtain the position deformation distance, and the position deformation distance is ratio-processed with the duration corresponding to the foundation pit excavation stage cycle to obtain the position deformation rate; If the position deformation rate of the detection point is greater than the deformation rate threshold, the detection point is marked as a fast deformation detection point.

5. The damage assessment method for adjacent structures based on foundation pit excavation according to claim 4 is characterized in that: The deformation damage value is obtained as follows: Count the number of rapid deformation detection points and perform ratio processing with the total number of detection points to obtain the rapid deformation number ratio; Perform difference processing on the position deformation distance corresponding to the rapid deformation detection point and the deformation distance threshold to obtain the position deformation distance difference, sum and average the position deformation distance differences of all rapid deformation detection points to obtain the position deformation distance average difference, perform ratio processing on the position deformation distance average difference and the deformation distance threshold to obtain the rapid deformation degree value; The damage risk value is obtained by summing the rapid deformation quantity ratio and the rapid deformation degree value.

6. The damage assessment method for adjacent structures based on foundation pit excavation according to claim 5 is characterized by: The process of judging the damage risk degree of the surrounding structure of the foundation pit according to the deformation damage value is specifically as follows: comparing the injury risk value to an injury risk threshold; If the damage risk value is greater than the damage risk threshold, it means that the damage risk level of the surrounding structures of the foundation pit is high; If the damage risk value is less than or equal to the damage risk threshold, it means that the damage risk level of the structure surrounding the foundation pit is low.

7. The damage assessment method for adjacent structures based on foundation pit excavation according to claim 1 is characterized by: The repetition number ratio CF and the damage fluctuation value BD are obtained as follows: Count the number of repeated damage points and compare them with the number of rapid deformation detection points to obtain the repeated number ratio, which is marked as CF. The position deformation distance difference and the number of damages of repeated damage points are obtained, and the position deformation distance difference and the number of damages are ratio processed to obtain the damage change ratio. The damage change ratios of all repeated damage points are integrated into a damage change group, and the variance value of the damage change group is calculated to obtain the damage fluctuation value, which is marked as BD.

8. A damage assessment system for adjacent structures based on foundation pit excavation, characterized in that: include: Optimization analysis module: By comparing and analyzing the locations of historical damage points and the locations of initially set detection points, it is determined whether the initially set detection points need to be optimized; The process of determining whether the initially set detection points need to be optimized is as follows: Based on any historical damage point; Obtain the location of the historical damage point and perform coincidence analysis with the location of the initially set detection point; If the location of a historical damage point coincides with the location of any initially set detection point, the historical damage point is marked as a coincident damage point; If the location of the historical damage point does not overlap with the locations of all the initially set detection points, the historical damage point is marked as a non-overlapping damage point; The overlapped damage points and non-overlapped damage points are processed and analyzed to obtain the damage overlap ratio SC and the damage deviation ratio SP. The formula is: The detection coincidence value CH is obtained, where s1 and s2 are both preset proportional coefficients; Compare the detection coincidence value CH with the detection coincidence threshold; If the detection coincidence value is greater than the detection coincidence threshold, it means that there is no need to optimize the initially set detection points; If the detection coincidence value is less than or equal to the detection coincidence threshold, it means that the initially set detection points need to be optimized; Optimization setting module: If the initially set detection points need to be optimized, the damage ranking table is determined by processing and analyzing the historical damage information, and the detection points are added and set, and finally the detection points are set; Detection marking module: By comparing and analyzing the initial position of the detection point and the real-time position of the detection point at the end of the foundation pit excavation period, the detection point is marked to obtain the rapid deformation detection point; Damage assessment module: Quantitative analysis of rapid deformation detection points and deformation degree analysis are performed to obtain deformation damage values, and the damage risk degree of the surrounding structures of the foundation pit is determined based on the deformation damage values; Damage source analysis module: If the damage risk of the structure around the foundation pit is high, extract the rapid deformation detection points, and compare them with the historical damage points to obtain repeated damage points. Then, process and analyze the repeated damage points to obtain the damage repetition value. According to the damage repetition value, determine whether the source of the damage risk of the structure around the foundation pit is caused by historical damage. The damage repetition value is obtained in the following manner: Extract fast deformation detection points based on any fast deformation detection point; If the rapid deformation detection point is a historical damage point, the rapid deformation detection point is marked as a repeated damage point; The repeated damage points were processed and analyzed to obtain the repeated number ratio CF and the damage fluctuation value BD; By formula: The damage repetition value SF is obtained, wherein a1 and a2 are both preset proportional coefficients; The process of judging whether the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage according to the damage repetition value is as follows: The damage repetition value SF is compared with the damage repetition threshold; If the damage repetition value SF is greater than the damage repetition threshold, it means that the source of the damage risk of the surrounding structure of the foundation pit is caused by historical damage; If the damage repetition value SF is less than or equal to the damage repetition threshold, it means that the source of the damage risk of the structure around the foundation pit is not caused by historical damage.

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