Deep foundation pit settlement monitoring method, system and device for geotechnical engineering

Abstract

The invention relates to the technical field of deep foundation pit settlement survey, in particular to a deep foundation pit settlement monitoring method, system and device for geotechnical engineering.The method comprises the steps that a deep foundation pit settlement abnormal area and the intersection time period of settlement value continuous increasing time periods of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area are obtained; and the settlement uniformity degree of any two key monitoring points of the deep foundation pit is obtained based on the intersection time period, so that the settlement risk degree of the abnormal settlement area of the deep foundation pit is obtained, and the overall settlement degree of the deep foundation pit is obtained according to the settlement risk degree of each abnormal settlement area of the deep foundation pit, so that the accuracy of the overall settlement degree of the deep foundation pit is improved; and risk assessment is carried out on the deep foundation pit according to the overall settlement degree of the deep foundation pit, and finally the accuracy of the risk assessment result of the deep foundation pit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit settlement survey, and in particular to a deep foundation pit settlement monitoring method, system and device for geotechnical engineering. Background Art

[0002] A deep foundation pit refers to the space below the ground surface that is excavated for the construction of basements and foundations of buildings or structures, the laying of municipal pipe networks, and the use of underground space. During the excavation and construction of a deep foundation pit, the stress state of the soil changes, which will cause the foundation pit to settle. Settlement is one of the key indicators reflecting the stability of the foundation pit itself. By monitoring the settlement of a deep foundation pit, accurate settlement data can be obtained for risk assessment of the deep foundation pit.

[0003] Traditional risk assessment methods use the settlement value of a single monitoring point at a certain time node as a safety assessment indicator, which does not consider time correlation or spatial correlation. The safety of a deep foundation pit does not only depend on the settlement of a certain monitoring point at a certain moment, but is closely related to the stability of the entire foundation pit soil. Using only the settlement value of a single monitoring point at a certain time node as a safety assessment indicator can only reflect the local settlement of the point, which not only cannot reflect the stress distribution and coordinated deformation inside the soil, but also reduces the accuracy of the settlement risk assessment of the deep foundation pit. Summary of the invention

[0004] In order to solve the technical problem of low accuracy of existing deep foundation pit settlement monitoring methods, the purpose of the present invention is to provide a deep foundation pit settlement monitoring method, system and device for geotechnical engineering. The technical solutions adopted are as follows: In a first aspect of the present invention, a deep foundation pit settlement monitoring method for geotechnical engineering is provided, comprising: Acquire the abnormal settlement area of ​​deep foundation pit, wherein the abnormal settlement area of ​​deep foundation pit is obtained by performing distance clustering on all key monitoring points of deep foundation pit; Obtaining the intersection period of continuous growth periods of settlement values ​​of any two key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormality area, and obtaining the settlement uniformity of any two key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormality area based on the intersection period; According to the association between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained; the deep foundation pit reference monitoring point is obtained by the settlement uniformity; The risk assessment of the deep foundation pit is performed according to the overall settlement degree of the deep foundation pit, and the overall settlement degree of the deep foundation pit is obtained by the settlement risk degree of each abnormal settlement area of ​​the deep foundation pit.

[0005] In an exemplary embodiment, before obtaining the abnormal deep foundation pit settlement area, the deep foundation pit settlement monitoring method further includes: Obtaining a time series data sequence of settlement values ​​of a plurality of initial monitoring points of a deep foundation pit, and obtaining a continuous growth period of the settlement values ​​in the time series data sequence of settlement values; According to the number of moments in the continuous growth period of the settlement value and the difference in settlement values ​​between every two adjacent moments in the continuous growth period of the settlement value, the criticality of each of the initial monitoring points of the deep foundation pit is obtained; the criticality is proportional to the number of moments and proportional to the difference in settlement values; According to the criticality, each of the initial monitoring points of the deep foundation pit is screened to obtain the critical monitoring points of the deep foundation pit.

[0006] In an exemplary embodiment, based on the intersection period, obtaining the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormality area includes: Obtaining the monitoring point distance between any two key monitoring points of the deep foundation pit; Obtaining the settlement area difference of each of the two deep foundation pit key monitoring points in the intersection period; the settlement area difference is the difference in settlement values ​​of the corresponding deep foundation pit key monitoring point at the beginning and end of the intersection period; According to the settlement area difference between any two key monitoring points of the deep foundation pit, the number of moments in the intersection period, and the distance between the monitoring points, the settlement uniformity of any two key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormal area is obtained.

[0007] In an exemplary embodiment, the calculation formula for the degree of sedimentation uniformity is as follows: ; in, It indicates the settlement uniformity between the key monitoring point of the jth deep foundation pit and the key monitoring point of the ith deep foundation pit in the settlement abnormal area of ​​the yth deep foundation pit. It represents the distance between the key monitoring point of the jth deep foundation pit and the key monitoring point of the ith deep foundation pit in the abnormal settlement area of ​​the yth deep foundation pit. Express The negative correlation normalization of , A represents the number of intersection periods between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, a represents the ath intersection period, represents the number of moments in the ath intersection period between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, represents the difference in settlement area of ​​the jth key monitoring point in the ath intersection period, represents the difference in settlement area of ​​the ith key monitoring point in the ath intersection period, Express The negative correlation normalization of Represents the normalization function.

[0008] In an exemplary embodiment, according to the association between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained, including: Obtain the average settlement uniformity of each deep foundation pit key monitoring point and its corresponding deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area; Obtain the criticality average of the deep foundation pit reference monitoring points corresponding to each deep foundation pit key monitoring point in the deep foundation pit settlement abnormal area; Obtain the number of deep foundation pit reference monitoring points corresponding to each deep foundation pit key monitoring point in the deep foundation pit settlement abnormal area; According to the settlement uniformity mean, the criticality mean and the number of deep foundation pit reference monitoring points, the settlement risk sub-level of each deep foundation pit key monitoring point is obtained; According to the settlement risk sub-degrees of each deep foundation pit key monitoring point and the monitoring point distance between any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained.

[0009] In an exemplary embodiment, the calculation formula for the settlement risk degree of the deep foundation pit settlement abnormal area is as follows: ; in, It indicates the settlement risk level of the abnormal settlement area of ​​the y-th deep foundation pit. represents the number of key monitoring points of deep foundation pit in the y-th deep foundation pit settlement abnormal area, represents the number of deep foundation pit reference monitoring points corresponding to the jth deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, Express The negative correlation normalization of It represents the average settlement uniformity of the jth deep foundation pit key monitoring point and its corresponding deep foundation pit reference monitoring point in the yth deep foundation pit settlement abnormal area. represents the mean criticality of the deep foundation pit reference monitoring point corresponding to the jth deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, It represents the mean value of the monitoring point distance between any two key monitoring points of the deep foundation pit in the y-th deep foundation pit settlement abnormal area.

[0010] In an exemplary embodiment, the process of obtaining the overall settlement degree of the deep foundation pit includes: Obtain the area ratio of all deep foundation pit settlement abnormal areas; Obtain the shortest distance between any two deep foundation pit settlement abnormal areas, and the difference in settlement risk between any two deep foundation pit settlement abnormal areas; According to the area ratio, the shortest distance and the difference in settlement risk degree, the overall settlement degree of the deep foundation pit is obtained.

[0011] In an exemplary embodiment, the calculation formula for the overall settlement degree of the deep foundation pit is as follows: ; Among them, Z represents the overall settlement degree of the deep foundation pit, Represents the area of ​​abnormal settlement of all deep foundation pits. represents the total area of ​​the deep foundation pit, It represents the area ratio of all deep foundation pit settlement abnormal areas. It indicates the settlement risk level of the abnormal settlement area of ​​the y-th deep foundation pit. It indicates the settlement risk degree of the z-th deep foundation pit settlement abnormal area except the y-th deep foundation pit settlement abnormal area. It represents the shortest distance between the abnormal settlement area of ​​the y-th deep foundation pit and the abnormal settlement area of ​​the z-th deep foundation pit. Express The negative correlation normalization of , B represents the number of abnormal settlement areas of deep foundation pit.

[0012] In the second aspect of the present invention, a deep foundation pit settlement monitoring system for geotechnical engineering is provided, comprising: a memory and a processor; the memory is connected to the processor; the memory is used to store program instructions; the processor is used to implement the above-mentioned deep foundation pit settlement monitoring method for geotechnical engineering when the program instructions are executed.

[0013] In a third aspect of the present invention, a deep foundation pit settlement monitoring device for geotechnical engineering is provided, and the deep foundation pit settlement monitoring device for geotechnical engineering includes a unit for executing the above-mentioned deep foundation pit settlement monitoring method for geotechnical engineering.

[0014] The present invention has the following beneficial effects: a deep foundation pit settlement monitoring method for geotechnical engineering provided by the present invention is based on a time series analysis of settlement values ​​at multiple monitoring points set in the deep foundation pit. Compared with the traditional method of only analyzing the settlement value of a single monitoring point at a certain time node, the accuracy of deep foundation pit settlement risk assessment is greatly improved; moreover, the abnormal settlement area of ​​the deep foundation pit is first obtained through multiple key monitoring points of the deep foundation pit, and then based on the correlation between the settlement value time series data of the key monitoring points of the deep foundation pit in the abnormal settlement area of ​​the deep foundation pit, the settlement uniformity of any two key monitoring points of the deep foundation pit is obtained, thereby improving the accuracy of obtaining the settlement risk degree of each subsequent abnormal settlement area of ​​the deep foundation pit. Since the overall settlement degree of the deep foundation pit is obtained from the settlement risk degree of each abnormal settlement area of ​​the deep foundation pit, the accuracy of the overall settlement degree of the deep foundation pit is improved, and finally the accuracy of the risk assessment results of the deep foundation pit is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of a deep foundation pit settlement monitoring method for geotechnical engineering provided by an embodiment of the present invention; Figure 2 A method for monitoring the settlement of a deep foundation pit for geotechnical engineering provided by an embodiment of the present invention also includes a flowchart of the steps; Figure 3 is a schematic diagram of obtaining an intersection time period provided by an embodiment of the present invention; Figure 4 is a flow chart for obtaining the degree of uniformity of sedimentation provided by an embodiment of the present invention; Figure 5 is a flowchart for obtaining reference monitoring points of a deep foundation pit provided by an embodiment of the present invention; Figure 6 is a flow chart for obtaining the degree of subsidence risk provided by an embodiment of the present invention; Figure 7 It is a flow chart for obtaining the overall settlement degree of a deep foundation pit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The data and information collected in this application have been obtained with full consent and authorization, and the collection, use and processing of relevant information must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0018] A deep foundation pit is a complex overall structure, and its stability depends on the comprehensive state of the soil in the entire deep foundation pit area. At the same time, the settlement of a deep foundation pit is a process that changes dynamically over time. The settlement value of a single monitoring point at a certain time node can only provide instantaneous information, and cannot reflect the changing trend and rate of settlement. Therefore, the deep foundation pit settlement monitoring method for geotechnical engineering provided by the present invention obtains the abnormal settlement area of ​​the deep foundation pit according to the key monitoring points of the deep foundation pit, and then obtains the settlement risk degree of the abnormal settlement area of ​​the deep foundation pit according to the settlement uniformity of any two deep foundation pit key monitoring points in the abnormal settlement area of ​​the deep foundation pit, and then obtains the overall settlement degree of the deep foundation pit according to the settlement risk degree of each abnormal settlement area of ​​the deep foundation pit, and finally performs risk assessment on the deep foundation pit according to the overall settlement degree of the deep foundation pit, thereby improving the accuracy of risk assessment.

[0019] The application scenario of a deep foundation pit settlement monitoring method for geotechnical engineering provided in this embodiment is: multiple deep foundation pit initial monitoring points are set at the bottom of the deep foundation pit, and the number of deep foundation pit initial monitoring points and the arrangement method in the deep foundation pit are set according to actual needs. In an exemplary embodiment, the deep foundation pit initial monitoring points are arranged in a grid at a certain interval (such as 5-10m) at the bottom of the deep foundation pit. At the same time, the points can be appropriately encrypted at important locations such as the turning point of the deep foundation pit and the place close to the surrounding buildings. The settlement value of each deep foundation pit initial monitoring point in the deep foundation pit at each moment (i.e., the sampling moment) is obtained using a precision level. Among them, the collection frequency of the settlement value is set according to actual needs. In an exemplary embodiment, the collection frequency is once every 6 hours. A monitoring time period is preset, such as 3 months, and the monitoring time period includes multiple moments, so as to obtain the settlement value time series data sequence of each deep foundation pit initial monitoring point, and the settlement value time series data sequence includes the settlement value at each moment in the monitoring time period.

[0020] The settlement value at a certain moment refers to the total vertical displacement of the initial monitoring point of the deep foundation pit relative to the initial elevation from the start of monitoring to that moment. In order to facilitate subsequent processing, the settlement values ​​are converted into positive numbers. The larger the value, the greater the settlement value.

[0021] Data processing equipment is set up to obtain the settlement value time series data sequence of each deep foundation pit initial monitoring point, and perform data processing, that is, to execute a deep foundation pit settlement monitoring method for geotechnical engineering provided in this embodiment.

[0022] like Figure 1As shown, this embodiment provides a deep foundation pit settlement monitoring method for geotechnical engineering, including: Step 1: Obtain the abnormal settlement area of ​​deep foundation pit, which is obtained by performing distance clustering on all key monitoring points of deep foundation pit; Step 2: Obtain the intersection period of the continuous growth period of the settlement value of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area, and obtain the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area based on the intersection period; Step 3: According to the association between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained; the deep foundation pit reference monitoring point is obtained by the settlement uniformity; Step 4: Conduct risk assessment on the deep foundation pit based on the overall settlement degree of the deep foundation pit. The overall settlement degree of the deep foundation pit is obtained by the settlement risk degree of each abnormal settlement area of ​​the deep foundation pit.

[0023] The following is a detailed description of the various steps of a deep foundation pit settlement monitoring method for geotechnical engineering provided in this embodiment.

[0024] Step 1: Obtain the abnormal settlement area of ​​deep foundation pit. The abnormal settlement area of ​​deep foundation pit is obtained by distance clustering of all key monitoring points of deep foundation pit.

[0025] Changes in settlement usually do not occur overnight and may show gradual or cyclical changes. By analyzing the changes in settlement values ​​over time, potential trends in settlement can be discovered in advance. For example, an increase or change in the settlement rate indicates that certain areas of a deep foundation pit may experience greater settlement in the future. Identifying these changes in advance helps take measures to intervene and avoid further risks.

[0026] In an exemplary embodiment, the key monitoring points of the deep foundation pit are obtained by screening the initial monitoring points of the deep foundation pit. Therefore, before obtaining the abnormal settlement area of ​​the deep foundation pit, it is necessary to obtain the key monitoring points of the deep foundation pit according to the initial monitoring points of the deep foundation pit. Specifically, Figure 2 As shown, the deep foundation pit settlement monitoring method also includes the following steps: Step 1-1: Obtain a time series data sequence of settlement values ​​of a plurality of initial monitoring points of a deep foundation pit, and obtain a period of continuous growth of settlement values ​​in the time series data sequence of settlement values.

[0027] The settlement value time series data sequence of each initial monitoring point of the deep foundation pit is obtained. The settlement value time series data sequence includes the settlement values ​​at each moment within the monitoring time period and is arranged in time series.

[0028] Then, for any sedimentation value time series data sequence, obtain the sedimentation value continuous growth period in the sedimentation value time series data sequence. The sedimentation value continuous growth period means that during this period, the sedimentation value is in a continuous growth state. In an exemplary embodiment, the difference between the x-th sedimentation value and its adjacent previous sedimentation value (i.e., the x-1-th sedimentation value) in the sedimentation value time series data sequence is calculated. When the difference is greater than 0, the moment corresponding to the x-th sedimentation value is used as a reference moment, and the consecutive adjacent reference moments constitute a sedimentation value continuous growth period.

[0029] Step 1-2: According to the number of moments in the continuous growth period of the settlement value and the difference in the settlement value between every two adjacent moments in the continuous growth period of the settlement value, the criticality of the initial monitoring point of each deep foundation pit is obtained.

[0030] During the excavation of deep foundation pits, as time goes by and the excavation depth increases, the stress state of the soil changes continuously and may gradually change from a stable state to an unstable state. This dynamic process can be captured by monitoring the changes in settlement values ​​over time. If the settlement value of an initial monitoring point of a deep foundation pit increases rapidly in a short period of time, it may mean that the soil at the initial monitoring point of the deep foundation pit is undergoing rapid deformation and there is a risk of instability. Therefore, the higher the criticality of the initial monitoring point of the deep foundation pit, the more reference value it has.

[0031] Therefore, the criticality of each deep foundation pit initial monitoring point is obtained according to the number of moments in the period of continuous growth of settlement values ​​and the difference in settlement values ​​between every two adjacent moments in the period of continuous growth of settlement values. The more moments in the period of continuous growth of settlement values, the more active and drastic the settlement changes at the initial monitoring point of the deep foundation pit are, the more attention is needed, and the greater the criticality is. Moreover, the greater the difference in settlement values ​​between every two adjacent moments in the period of continuous growth of settlement values, the more likely the initial monitoring point of the deep foundation pit is to be in an unstable state, the more attention is needed, and the greater the criticality is. Therefore, the criticality is proportional to the number of moments and proportional to the difference in settlement values.

[0032] In an exemplary embodiment, a specific quantitative formula of the criticality is given as follows: ; in, Indicates the criticality of the initial monitoring point of the g-th deep foundation pit, It represents the number of moments of continuous growth of all settlement values ​​in the settlement value time series data sequence of the initial monitoring point of the g-th deep foundation pit, that is, the number of reference moments in the settlement value time series data sequence, represents the number of moments in the settlement value time series data sequence of the g-th deep foundation pit initial monitoring point, C represents the number of continuous growth periods of settlement values ​​in the settlement value time series data sequence of the g-th deep foundation pit initial monitoring point, and c represents the c-th continuous growth period of settlement values; It represents the number of reference moments in the continuous growth period of the cth settlement value of the initial monitoring point of the gth deep foundation pit. The larger the number, the more the settlement value shows an increasing trend during the continuous growth period of the cth settlement value, and the more attention needs to be paid. Represents a normalization function. The normalization in this embodiment and the norm normalization function can be specifically set according to actual conditions, for example, the maximum and minimum value normalization method can be adopted, or the following common method can be adopted: , It represents the processing object, and exp represents the exponential function with the natural constant e as the base.

[0033] Calculate the absolute value of the difference between the settlement value of each reference time and the adjacent previous time in the continuous growth period of the settlement value of the cth initial monitoring point of the gth deep foundation pit, and then calculate the average value of the absolute value of the difference in the settlement value. To express, that is It represents the average value of the absolute value of the difference in settlement values ​​corresponding to the continuous growth period of the c-th settlement value of the initial monitoring point of the g-th deep foundation pit. The larger the average value is, the greater the settlement change amplitude is during the continuous growth period of the c-th settlement value of the initial monitoring point of the g-th deep foundation pit, the more likely the g-th deep foundation pit initial monitoring point is to be in an unstable state, and the greater the criticality is.

[0034] It represents the proportion of reference time in the initial monitoring point of the g-th deep foundation pit, reflecting the frequency of reference time in the settlement process of the initial monitoring point of the g-th deep foundation pit. The larger it is, the more active and drastic the settlement change at the initial monitoring point of the g-th deep foundation pit is, and the more attention it needs.

[0035] Step 1-3: Screen the initial monitoring points of each deep foundation pit according to the criticality to obtain the key monitoring points of the deep foundation pit.

[0036] The greater the criticality, the more attention the corresponding initial monitoring point of the deep foundation pit needs. Therefore, in an exemplary embodiment, a criticality threshold is preset. The value range of the preset criticality threshold is 0-1, and the specific value is set according to the actual screening needs. For example, if more monitoring points are required for subsequent data analysis, the preset criticality threshold can be set smaller, such as 0.6.

[0037] Compare the criticality of each deep foundation pit initial monitoring point with the preset criticality threshold, obtain the criticality greater than or equal to the preset criticality threshold, and use the deep foundation pit initial monitoring points with criticality greater than or equal to the preset criticality threshold as the deep foundation pit key monitoring points to realize the screening of each deep foundation pit initial monitoring point.

[0038] During the construction of deep foundation pits, settlement is often not evenly distributed. Some areas may be affected by local soil compression, groundwater flow, uneven force on the support structure, and other factors, and the settlement phenomenon is relatively concentrated and significant. By dividing the settlement abnormal area, especially the area formed by the key monitoring points of the deep foundation pit, the settlement abnormal area can be clearly identified to prevent the safety hazards of a larger range caused by local settlement abnormalities.

[0039] Obtain the monitoring point distance between any two key monitoring points of the deep foundation pit, which is the straight-line distance between any two key monitoring points of the deep foundation pit in the deep foundation pit.

[0040] In an exemplary embodiment, the monitoring point distance between any two deep foundation pit key monitoring points is used as the cluster distance between any two deep foundation pit key monitoring points, and the K-means clustering algorithm is used to perform clustering operations on all deep foundation pit key monitoring points to obtain a number of deep foundation pit settlement abnormal areas. Among them, the K value in the K-means clustering algorithm, that is, the number of clusters, is set according to actual needs. According to the deep foundation pit key monitoring points in each deep foundation pit settlement abnormal area, the convex hull area of ​​each deep foundation pit settlement abnormal area can be obtained.

[0041] Step 2: Obtain the intersection period of the continuous growth period of the settlement value of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area, and based on the intersection period, obtain the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area.

[0042] In deep foundation pit sites, geological conditions are often uneven. For example, the soil structure in different deep foundation pit settlement abnormal areas in the deep foundation pit is not uniform, and the groundwater level is usually unevenly distributed in the deep foundation pit site. Analyzing the settlement uniformity between the key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormal area helps to further analyze the geological conditions in the deep foundation pit settlement abnormal area. Then, the intersection period of the continuous growth period of the settlement value of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area is obtained, and based on the intersection period, the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area is obtained.

[0043] For the sake of convenience, the yth deep foundation pit settlement abnormal area is set as any deep foundation pit settlement abnormal area, and any two deep foundation pit key monitoring points in the yth deep foundation pit settlement abnormal area are set as the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point.

[0044] First, obtain the intersection period of the continuous growth period of the settlement value of the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, as follows: Figure 3 As shown, Figure 3 The reference period in is the period of continuous growth of settlement value, the jth monitoring point is the key monitoring point of the jth deep foundation pit, the ith monitoring point is the key monitoring point of the ith deep foundation pit, a1 and a2 in the figure represent the intersection period of the reference period 1 of the ith monitoring point and the jth monitoring point, and a3 and a4 in the figure represent the intersection period of the reference period 2 of the ith monitoring point and the jth monitoring point. It should be understood that Figure 3 This is just an example. When obtaining the intersection period, the continuous growth period of the settlement value of the same serial number does not necessarily have an intersection period. For example, the second continuous growth period of the settlement value of the j-th deep foundation pit key monitoring point and the second continuous growth period of the settlement value of the ith deep foundation pit key monitoring point do not necessarily have an intersection period. It is possible that the third continuous growth period of the settlement value of the j-th deep foundation pit key monitoring point and the second continuous growth period of the settlement value of the ith deep foundation pit key monitoring point have an intersection period. Thus, the intersection period of the continuous growth period of the settlement value of the j-th deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the y-th deep foundation pit settlement abnormal area is obtained. There may be more than one intersection period between the j-th deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point.

[0045] Then, based on the intersection period, the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormality area is obtained. In an exemplary embodiment, Figure 4 As shown, a specific process for obtaining the uniformity of sedimentation is given as follows: Step 2-1: Obtain the monitoring point distance between any two key monitoring points of deep foundation pits.

[0046] Step 2-2: Obtain the settlement area difference of each deep foundation pit key monitoring point in the intersection period between any two deep foundation pit key monitoring points.

[0047] The settlement area difference is the difference between the settlement values ​​of the key monitoring point of the deep foundation pit at the beginning and end of the intersection period. Specifically: for the jth key monitoring point in the ath intersection period, obtain the settlement value of the jth key monitoring point at the beginning of the ath intersection period and the settlement value at the end of the ath intersection period, calculate the absolute value of the difference between the settlement value of the jth key monitoring point at the beginning of the ath intersection period and the settlement value at the end of the ath intersection period, and use To express, that is Represents the settlement area difference of the jth key monitoring point in the ath intersection period. Similarly, for the ith key monitoring point in the ath intersection period, obtain the settlement value of the ith key monitoring point at the start time of the ath intersection period and the settlement value at the end time of the ath intersection period, calculate the absolute value of the difference between the settlement value of the ith key monitoring point at the start time of the ath intersection period and the settlement value at the end time of the ath intersection period, and use To express, that is It represents the difference of settlement area at the ith key monitoring point in the ath intersection period.

[0048] Step 2-3: According to the settlement area difference between any two deep foundation pit key monitoring points, the number of moments in the intersection period, and the distance between the monitoring points, the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area is obtained.

[0049] According to the settlement area difference of any two deep foundation pit key monitoring points in the same intersection period, the difference of the two settlement area differences is obtained, which is the settlement change difference. The smaller the settlement change difference is, the closer the settlement change of any two deep foundation pit key monitoring points in the same intersection period is, and the higher the settlement uniformity is. The more the number of moments in the intersection period, the more credible the settlement change trend in the corresponding intersection period is, and the higher the settlement uniformity is. The smaller the monitoring point distance between any two deep foundation pit key monitoring points, the more similar the soil properties of the two deep foundation pit key monitoring points will be, and the more likely they will be affected by the same or similar geological conditions, the higher the settlement uniformity is. Therefore, according to the settlement area difference of any two deep foundation pit key monitoring points, the number of moments in the intersection period, and the distance between the monitoring points, the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area is obtained. The settlement uniformity is proportional to the number of moments in the intersection period, and inversely proportional to the difference in settlement area difference and the distance between the monitoring points.

[0050] In an exemplary embodiment, a specific quantitative formula for the uniformity of sedimentation is given as follows: ; in, It indicates the settlement uniformity between the key monitoring point of the jth deep foundation pit and the key monitoring point of the ith deep foundation pit in the settlement abnormal area of ​​the yth deep foundation pit. represents the monitoring point distance between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, A represents the number of intersection periods between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, a represents the ath intersection period, represents the number of moments in the ath intersection period between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, represents the difference in settlement area of ​​the jth key monitoring point in the ath intersection period, It represents the difference of settlement area at the ith key monitoring point in the ath intersection period.

[0051] The larger it is, the more moments of the a-th intersection period between the j-th deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the y-th deep foundation pit settlement abnormal area are, the more credible the settlement change trend in the a-th intersection period is, and the higher the settlement uniformity is.

[0052] The smaller it is, that is, the smaller the monitoring point distance between the j-th deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the y-th deep foundation pit settlement abnormal area, the more similar the soil properties of the j-th deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point will be, the more likely they are to be affected by the same or similar geological conditions, and the higher the settlement uniformity will be. Express The negative correlation normalization method in this embodiment can be specifically set according to actual conditions, for example, the following common methods are adopted: .

[0053] The difference between the settlement area difference between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area in the ath intersection period is expressed as the settlement change difference, The smaller it is, the closer the settlement changes of the j-th deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the same intersection period are, and the higher the settlement uniformity is. Express Negative correlation normalization.

[0054] Step 3: According to the relationship between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained; the deep foundation pit reference monitoring point is obtained by the settlement uniformity.

[0055] The smaller the settlement uniformity between any two deep foundation pit key monitoring points in the same deep foundation pit settlement abnormal area, the more complicated the stress situation between the two deep foundation pit key monitoring points. In the deep foundation pit, the smaller the settlement uniformity, the uneven distribution of additional stress on the deep foundation pit key monitoring points. The smaller the settlement uniformity between each deep foundation pit key monitoring point and other deep foundation pit key monitoring points in the same deep foundation pit settlement abnormal area, the more different the soil properties in the deep foundation pit settlement abnormal area may be.

[0056] Accordingly, it is necessary to first obtain the deep foundation pit reference monitoring points of each deep foundation pit key monitoring point according to the settlement uniformity of any two deep foundation pit key monitoring points obtained in step 2. Figure 5 As shown in the figure, a specific process of obtaining reference monitoring points of deep foundation pit is given as follows: Step 3-1: Obtain the settlement uniformity of the first deep foundation pit key monitoring point and other deep foundation pit key monitoring points.

[0057] For the sake of convenience, the first deep foundation pit key monitoring point is set as any deep foundation pit key monitoring point, and the settlement uniformity of the first deep foundation pit key monitoring point and other deep foundation pit key monitoring points in the same deep foundation pit settlement abnormal area is obtained.

[0058] Step 3-2: other deep foundation pit key monitoring points corresponding to settlement uniformity greater than or equal to a preset settlement uniformity threshold are used as deep foundation pit reference monitoring points of the first deep foundation pit key monitoring points.

[0059] Since the higher the settlement uniformity, the more relevant the two key monitoring points of the deep foundation pit are, a settlement uniformity threshold is preset. The value range of the preset settlement uniformity threshold is 0-1, and the specific value of the preset settlement uniformity threshold is set according to the acquisition of the deep foundation pit reference monitoring points. If more deep foundation pit reference monitoring points are to be obtained, the preset settlement uniformity threshold can be set smaller. This embodiment takes 0.5 as an example.

[0060] The settlement uniformity of the first deep foundation pit key monitoring point and other deep foundation pit key monitoring points in the same deep foundation pit settlement abnormality area is compared with the preset settlement uniformity threshold, and other deep foundation pit key monitoring points corresponding to the settlement uniformity greater than or equal to the preset settlement uniformity threshold are obtained as the deep foundation pit reference monitoring points of the first deep foundation pit key monitoring point. Among them, the more deep foundation pit reference monitoring points the first deep foundation pit key monitoring point has, the more stable the settlement change in the deep foundation pit settlement abnormality area where the first deep foundation pit key monitoring point is located, rather than sudden local fluctuations.

[0061] Then, according to the association between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained. In an exemplary embodiment, Figure 6 As shown in Figure 2, a specific process for obtaining the degree of subsidence risk is given as follows: Step 3-3: Obtain the average settlement uniformity of each deep foundation pit key monitoring point and its corresponding deep foundation pit reference monitoring point in the deep foundation pit settlement abnormality area.

[0062] Step 3-4: Obtain the criticality average of the deep foundation pit reference monitoring points corresponding to each deep foundation pit key monitoring point in the deep foundation pit settlement abnormality area.

[0063] Step 3-5: Obtain the number of deep foundation pit reference monitoring points corresponding to each deep foundation pit key monitoring point in the deep foundation pit settlement abnormal area.

[0064] Step 3-6: Based on the mean settlement uniformity, the mean criticality and the number of deep foundation pit reference monitoring points, the settlement risk sub-level of each deep foundation pit key monitoring point is obtained.

[0065] Taking the j-th deep foundation pit key monitoring point in the y-th deep foundation pit settlement abnormal area as an example, obtain the settlement uniformity of each deep foundation pit reference monitoring point of the j-th deep foundation pit key monitoring point and the j-th deep foundation pit key monitoring point, and calculate the average settlement uniformity of each deep foundation pit reference monitoring point of the j-th deep foundation pit key monitoring point and the j-th deep foundation pit key monitoring point; obtain the criticality of each deep foundation pit reference monitoring point of the j-th deep foundation pit key monitoring point, and then calculate the average criticality of each deep foundation pit reference monitoring point of the j-th deep foundation pit key monitoring point; obtain the number of deep foundation pit reference monitoring points of the j-th deep foundation pit key monitoring point.

[0066] In an exemplary embodiment, a specific quantitative method for the settlement risk sub-level of the j-th deep foundation pit key monitoring point is given as follows: ; in, It represents the settlement risk sub-level of the jth deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, represents the number of deep foundation pit reference monitoring points corresponding to the jth deep foundation pit key monitoring point, It represents the average settlement uniformity of the jth deep foundation pit key monitoring point and its corresponding deep foundation pit reference monitoring point in the yth deep foundation pit settlement abnormal area. It represents the mean criticality of the deep foundation pit reference monitoring point corresponding to the j-th deep foundation pit key monitoring point in the y-th deep foundation pit settlement abnormal area.

[0067] The number of deep foundation pit reference monitoring points corresponding to the jth deep foundation pit key monitoring point The more the number of deep foundation pit reference monitoring points of the first deep foundation pit key monitoring point is, the more stable the settlement change of the j-th deep foundation pit key monitoring point is, the less sudden local fluctuation is, and the lower the settlement risk of the j-th deep foundation pit key monitoring point is, that is, the smaller the settlement risk sub-degree of the j-th deep foundation pit key monitoring point is. Therefore, the number of deep foundation pit reference monitoring points corresponding to the j-th deep foundation pit key monitoring point is It is inversely proportional to the settlement risk level of the jth deep foundation pit key monitoring point. Indicates the number of deep foundation pit reference monitoring points corresponding to the jth deep foundation pit key monitoring point Negative correlation normalization.

[0068] Mean value of uniformity of sedimentation The larger the value is, the more uniform the settlement distribution is in the deep foundation pit settlement abnormal area where the j-th deep foundation pit key monitoring point is located, the smaller the change of settlement between different deep foundation pit key monitoring points is, and the lower the settlement risk of the j-th deep foundation pit key monitoring point is, that is, the smaller the settlement risk level of the j-th deep foundation pit key monitoring point is. Therefore, the average settlement uniformity is It is inversely proportional to the settlement risk level of the jth deep foundation pit key monitoring point. Indicates the average value of the uniformity of settlement Negative correlation normalization.

[0069] Mean criticality The larger it is, the more active the settlement changes of all deep foundation pit reference monitoring points corresponding to the j-th deep foundation pit key monitoring point are, and the higher the settlement risk of the j-th deep foundation pit key monitoring point is, that is, the greater the settlement risk sub-degree of the j-th deep foundation pit key monitoring point is.

[0070] Step 3-7: According to the settlement risk sub-level of each deep foundation pit key monitoring point and the monitoring point distance between any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area, the settlement risk level of the deep foundation pit settlement abnormal area is obtained.

[0071] In an exemplary embodiment, a specific quantitative method for determining the settlement risk level of an abnormal settlement area in a deep foundation pit is given as follows: ; in, It indicates the settlement risk level of the abnormal settlement area of ​​the y-th deep foundation pit. represents the number of key monitoring points of deep foundation pit in the y-th deep foundation pit settlement abnormal area, It represents the mean value of the monitoring point distance between any two key monitoring points of the deep foundation pit in the y-th deep foundation pit settlement abnormal area.

[0072] The mean distance between monitoring points The larger it is, the more uneven the settlement in the abnormal settlement area of ​​the yth deep foundation pit is, the more likely the uneven settlement will lead to structural damage and distortion, and the greater the settlement risk.

[0073] Through the above method, the settlement risk degree of each deep foundation pit settlement abnormal area is obtained.

[0074] Step 4: Conduct risk assessment on the deep foundation pit based on the overall settlement degree of the deep foundation pit. The overall settlement degree of the deep foundation pit is obtained by the settlement risk degree of each abnormal settlement area of ​​the deep foundation pit.

[0075] Since the settlement risk level of each abnormal settlement area of ​​deep foundation pits reflects the settlement risk of each abnormal settlement area of ​​deep foundation pits, and the overall settlement level of deep foundation pits involves the deformation of the entire foundation pit area, the settlement of deep foundation pits develops gradually during the construction process of deep foundation pits, and the overall settlement level can help monitor and predict the evolution trend of settlement. Therefore, relying solely on the settlement risk level of a single abnormal settlement area of ​​deep foundation pits cannot fully reflect the settlement status of deep foundation pits, and further analysis of all abnormal settlement areas of deep foundation pits is required.

[0076] First, the overall settlement degree of the deep foundation pit is obtained according to the settlement risk degree of each deep foundation pit settlement abnormal area. In an exemplary embodiment, Figure 7 As shown in Figure 1, the process of obtaining the overall settlement degree of the deep foundation pit includes: Step 4-1: Obtain the area percentage of all deep foundation pit settlement abnormal areas.

[0077] The area of ​​each abnormal settlement area of ​​the deep foundation pit is obtained, and then the sum of the areas of all abnormal settlement areas of the deep foundation pit is calculated, and finally the ratio of the sum to the total area of ​​the deep foundation pit is calculated as the area ratio of all abnormal settlement areas of the deep foundation pit. Since the abnormal settlement area of ​​the deep foundation pit is composed of multiple key monitoring points of the deep foundation pit, then, in an exemplary embodiment, the area of ​​the convex hull area of ​​the abnormal settlement area of ​​the deep foundation pit can be obtained, and the area of ​​the convex hull area is used as the area of ​​the abnormal settlement area of ​​the deep foundation pit. Thus, the sum of the areas of all convex hull areas is used as the sum of the areas of all abnormal settlement areas of the deep foundation pit.

[0078] Step 4-2: Obtain the shortest distance between any two deep foundation pit settlement abnormal areas, and the difference in settlement risk between any two deep foundation pit settlement abnormal areas.

[0079] Obtain the shortest distance between any two deep foundation pit settlement abnormal areas. In an exemplary embodiment, the monitoring point distances between each deep foundation pit key monitoring point in one of the two deep foundation pit settlement abnormal areas and each deep foundation pit key monitoring point in the other deep foundation pit settlement abnormal area can be obtained, and then the minimum monitoring point distance is obtained as the shortest distance between the two deep foundation pit settlement abnormal areas.

[0080] Step 4-3: According to the area ratio, shortest distance and settlement risk level, the overall settlement level of the deep foundation pit is obtained.

[0081] The larger the area ratio is, the wider the distribution of abnormal settlement areas of deep foundation pits in the deep foundation pits is, which means that there may be a large number of uneven settlement areas in the deep foundation pits, and the settlement degree of the deep foundation pits is relatively serious, that is, the higher the overall settlement degree of the deep foundation pits is. The smaller the shortest distance is, the smaller the distance between the abnormal settlement areas of the deep foundation pits is, and the higher the overall settlement degree of the deep foundation pits is. The greater the difference in settlement risk levels, the more uneven the settlement risks between the abnormal settlement areas of the deep foundation pits, the more complex the settlement risks, and the higher the overall settlement degree of the deep foundation pits. Therefore, based on the area ratio, the shortest distance and the difference in settlement risk levels, the overall settlement degree of the deep foundation pit is obtained. The overall settlement degree of the deep foundation pit is proportional to the area ratio and the difference in settlement risk levels, and inversely proportional to the shortest distance. In an exemplary embodiment, a specific quantitative method for the overall settlement degree of the deep foundation pit is given as follows: ; Among them, Z represents the overall settlement degree of the deep foundation pit, Represents the area of ​​abnormal settlement of all deep foundation pits. represents the total area of ​​the deep foundation pit, It represents the area ratio of all deep foundation pit settlement abnormal areas. It indicates the settlement risk level of the abnormal settlement area of ​​the y-th deep foundation pit. It indicates the settlement risk degree of the z-th deep foundation pit settlement abnormal area except the y-th deep foundation pit settlement abnormal area. It represents the shortest distance between the abnormal settlement area of ​​the y-th deep foundation pit and the abnormal settlement area of ​​the z-th deep foundation pit. Express The negative correlation normalization of , B represents the number of abnormal settlement areas of deep foundation pit.

[0082] Then, a risk assessment of the deep foundation pit is performed based on the overall settlement degree of the deep foundation pit. The greater the overall settlement degree of the deep foundation pit, the greater the risk of the deep foundation pit. In an exemplary embodiment, a first overall settlement degree threshold and a second overall settlement degree threshold are preset, and the numerical range of the first overall settlement degree threshold and the second overall settlement degree threshold is 0-1. The first overall settlement degree threshold is greater than the second overall settlement degree threshold. The specific values ​​of the first overall settlement degree threshold and the second overall settlement degree threshold are set according to actual judgment needs. For example, the first overall settlement degree threshold is 0.6, and the second overall settlement degree threshold is 0.3. Thus, it is divided into three numerical intervals. Then, when When the deep foundation pit is considered to be at low risk, The deep foundation pit is considered to be at medium risk when When deep foundation pits are considered to be at high risk.

[0083] Furthermore, relevant operations can be performed according to the risk level of the deep foundation pit. Specifically: when the deep foundation pit is at low risk, no other operations may be added and the regular monitoring frequency may be maintained to ensure stable settlement. When the deep foundation pit is at medium risk, the arrangement of monitoring points may be appropriately increased and the distance between monitoring points may be shortened to ensure more precise capture of settlement changes. At the same time, the monitoring frequency may be increased to promptly detect slight changes in settlement rate. When the deep foundation pit is at high risk, construction activities that may aggravate settlement shall be stopped immediately, experts shall be organized for consultation, and emergency treatment plans shall be formulated, such as foundation reinforcement, adjustment of support structures and other measures.

[0084] This embodiment also provides a deep foundation pit settlement monitoring device for geotechnical engineering, which includes a unit for executing the above-mentioned deep foundation pit settlement monitoring method for geotechnical engineering. Each unit can be a software unit corresponding to each method step, or can be a hardware circuit for executing each method step, which is not limited in this embodiment.

[0085] This embodiment also provides a deep foundation pit settlement monitoring system for geotechnical engineering, including: a memory and a processor; the memory is connected to the processor, and the memory is used to store program instructions; the processor is used to implement the steps in the above-mentioned deep foundation pit settlement monitoring method embodiment for geotechnical engineering when the program instructions are executed.

[0086] In an exemplary embodiment, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps in the above-mentioned embodiment of the deep foundation pit settlement monitoring method for geotechnical engineering.

[0087] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0088] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A deep foundation pit settlement monitoring method for geotechnical engineering, characterized in that: include: Acquire the abnormal settlement area of ​​deep foundation pit, wherein the abnormal settlement area of ​​deep foundation pit is obtained by performing distance clustering on all key monitoring points of deep foundation pit; Obtaining the intersection period of continuous growth periods of settlement values ​​of any two key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormality area, and obtaining the settlement uniformity of any two key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormality area based on the intersection period; According to the association between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained; the deep foundation pit reference monitoring point is obtained by the settlement uniformity; The risk assessment of the deep foundation pit is performed according to the overall settlement degree of the deep foundation pit, and the overall settlement degree of the deep foundation pit is obtained by the settlement risk degree of each abnormal settlement area of ​​the deep foundation pit.

2. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 1, characterized in that Before obtaining the abnormal area of ​​deep foundation pit settlement, the deep foundation pit settlement monitoring method further includes: Obtaining a time series data sequence of settlement values ​​of a plurality of initial monitoring points of a deep foundation pit, and obtaining a continuous growth period of the settlement values ​​in the time series data sequence of settlement values; According to the number of moments in the continuous growth period of the settlement value and the difference in settlement values ​​between every two adjacent moments in the continuous growth period of the settlement value, the criticality of each of the initial monitoring points of the deep foundation pit is obtained; the criticality is proportional to the number of moments and proportional to the difference in settlement values; According to the criticality, each of the initial monitoring points of the deep foundation pit is screened to obtain the critical monitoring points of the deep foundation pit.

3. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 1 or 2, characterized in that: Based on the intersection period, the settlement uniformity of any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area is obtained, including: Obtaining the monitoring point distance between any two key monitoring points of the deep foundation pit; Obtaining the settlement area difference of each of the two deep foundation pit key monitoring points in the intersection period; the settlement area difference is the difference in settlement values ​​of the corresponding deep foundation pit key monitoring point at the beginning and end of the intersection period; According to the settlement area difference between any two key monitoring points of the deep foundation pit, the number of moments in the intersection period, and the distance between the monitoring points, the settlement uniformity of any two key monitoring points of the deep foundation pit in the deep foundation pit settlement abnormal area is obtained.

4. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 3, characterized in that: The calculation formula for the uniformity of sedimentation is as follows: ； in, It indicates the settlement uniformity between the key monitoring point of the jth deep foundation pit and the key monitoring point of the ith deep foundation pit in the settlement abnormal area of ​​the yth deep foundation pit. It represents the distance between the key monitoring point of the jth deep foundation pit and the key monitoring point of the ith deep foundation pit in the abnormal settlement area of ​​the yth deep foundation pit. Express The negative correlation normalization of , A represents the number of intersection periods between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, a represents the ath intersection period, represents the number of moments in the ath intersection period between the jth deep foundation pit key monitoring point and the ith deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, represents the difference in settlement area of ​​the jth key monitoring point in the ath intersection period, represents the difference in settlement area of ​​the ith key monitoring point in the ath intersection period, Express The negative correlation normalization of Represents the normalization function.

5. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 2, characterized in that: According to the association between each deep foundation pit key monitoring point and its deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained, including: Obtain the average settlement uniformity of each deep foundation pit key monitoring point and its corresponding deep foundation pit reference monitoring point in the deep foundation pit settlement abnormal area; Obtain the criticality average of the deep foundation pit reference monitoring points corresponding to each deep foundation pit key monitoring point in the deep foundation pit settlement abnormal area; Obtain the number of deep foundation pit reference monitoring points corresponding to each deep foundation pit key monitoring point in the deep foundation pit settlement abnormal area; According to the settlement uniformity mean, the criticality mean and the number of deep foundation pit reference monitoring points, the settlement risk sub-level of each deep foundation pit key monitoring point is obtained; According to the settlement risk sub-degrees of each deep foundation pit key monitoring point and the monitoring point distance between any two deep foundation pit key monitoring points in the deep foundation pit settlement abnormal area, the settlement risk degree of the deep foundation pit settlement abnormal area is obtained.

6. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 5, characterized in that: The calculation formula for the settlement risk degree of the abnormal settlement area of ​​the deep foundation pit is as follows: ； in, It indicates the settlement risk level of the abnormal settlement area of ​​the y-th deep foundation pit. represents the number of key monitoring points of deep foundation pit in the y-th deep foundation pit settlement abnormal area, represents the number of deep foundation pit reference monitoring points corresponding to the jth deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, Express The negative correlation normalization of It represents the average settlement uniformity of the jth deep foundation pit key monitoring point and its corresponding deep foundation pit reference monitoring point in the yth deep foundation pit settlement abnormal area. represents the mean criticality of the deep foundation pit reference monitoring point corresponding to the jth deep foundation pit key monitoring point in the yth deep foundation pit settlement abnormal area, It represents the mean value of the monitoring point distance between any two key monitoring points of the deep foundation pit in the y-th deep foundation pit settlement abnormal area.

7. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 1 or 2, characterized in that: The process of obtaining the overall settlement degree of the deep foundation pit includes: Obtain the area ratio of all deep foundation pit settlement abnormal areas; Obtain the shortest distance between any two deep foundation pit settlement abnormal areas, and the difference in settlement risk between any two deep foundation pit settlement abnormal areas; According to the area ratio, the shortest distance and the difference in settlement risk degree, the overall settlement degree of the deep foundation pit is obtained.

8. A deep foundation pit settlement monitoring method for geotechnical engineering as claimed in claim 7, characterized in that: The calculation formula for the overall settlement of the deep foundation pit is as follows: Among them, Z represents the overall settlement degree of the deep foundation pit, Represents the area of ​​abnormal settlement of all deep foundation pits. represents the total area of ​​the deep foundation pit, It represents the area ratio of all deep foundation pit settlement abnormal areas. It indicates the settlement risk level of the abnormal settlement area of ​​the y-th deep foundation pit. It indicates the settlement risk degree of the z-th deep foundation pit settlement abnormal area except the y-th deep foundation pit settlement abnormal area. It represents the shortest distance between the abnormal settlement area of ​​the y-th deep foundation pit and the abnormal settlement area of ​​the z-th deep foundation pit. Express The negative correlation normalization of , B represents the number of abnormal settlement areas of deep foundation pit.

9. A deep foundation pit settlement monitoring system for geotechnical engineering, characterized by comprising: Memory and processor; The memory is connected to the processor; The memory is used to store program instructions; The processor is used to implement the deep foundation pit settlement monitoring method for geotechnical engineering described in any one of claims 1 to 8 when the program instructions are executed.

10. A deep foundation pit settlement monitoring device for geotechnical engineering, characterized in that: The deep foundation pit settlement monitoring device for geotechnical engineering comprises a unit for executing the deep foundation pit settlement monitoring method for geotechnical engineering as described in any one of claims 1-8.

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