A pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations

Abstract

The present invention belongs to the technical field of deformation monitoring of pipe jacking operations, and specifically discloses a pipe end deformation monitoring system for deep-cover long-distance pipe jacking operations, the system comprising: by detecting internal defects of welds of butt-welded pipes, soil pressure conditions, and geometric deformation conditions, the external energy and internal energy of each contour unit of butt-welded pipes are defined, and it is determined whether to perform a repair welding operation on each contour unit; by detecting the axis inclination state and axis ovality of each contour unit of butt-welded pipes, it is determined whether to add steel pipe support measures to each contour unit; by determining the butt axial coordinate line on the axis contour of the butt-welded pipes, the pipe jacking operation strength of the prepared butt-welded pipe end is determined, and it is determined whether to reinforce the soil around the pipe jacking path; by determining the deformation risk of the jacking operation of the prepared butt-welded pipe end, potential deformation risks are discovered in time, so as to take preventive measures before the jacking operation.

Description

Technical Field

[0001] The invention belongs to the technical field of deformation monitoring of pipeline operations, and relates to a pipeline end deformation monitoring system for deep-covering and long-distance pipe jacking operations. Background Art

[0002] With the continuous development of urban construction, deep-covered and long-distance pipe jacking operations are increasingly used in underground pipeline laying and other projects. However, in this process, the deformation of pipe ends has become one of the key challenges faced by the project. Therefore, a new and more advanced pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations is urgently needed to ensure the smooth implementation and safe operation of the project.

[0003] There are also some solutions related to geometric structure deformation monitoring in the prior art. For example, Chinese Patent Publication No. CN110044289 discloses a tunnel multi-section convergence deformation video monitoring device and method based on automatic zoom. The device arranges marker points or targets in multiple monitoring sections, and calculates the structural convergence deformation according to the positioning changes between the marker points. At the same time, the video information of the monitoring section is obtained through the camera system, and the received data is analyzed and graded. When the result meets the warning conditions, the deformation warning feedback system issues a structural health status warning.

[0004] The following limitations exist: At present, the detection methods for deformation data tend to analyze the deformation shape parameters of the geometric structure itself, without considering the dynamic change interference factors related to the structural operation. It is difficult to combine soil pressure, geometric shape deformation and other factors to comprehensively evaluate the energy situation of the contour unit where the geometric structure is located, so that it is impossible to make comprehensive and accurate compensation measures. In addition, when judging the deformation risk of the geometric structure, the deformation of the completed structure is mainly based on the deformation of the geometric structure to be cast, which makes it difficult to fully and timely discover potential deformation risks. Summary of the invention

[0005] In view of this, in order to solve the problems raised in the above background technology, a pipe end deformation monitoring system for deep-covering and long-distance pipe jacking operations is proposed.

[0006] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations, the system comprising: a pipe soil cover contour model construction module, which is used to record each pipe section of the butt-welded pipe as each contour unit, numbered 1, 2, ...k..., b, construct the corresponding soil cover contour model of the butt-welded pipe, and extract the pre-stored benchmark constructed contour model of the butt-welded pipe.

[0007] The long-distance jacking pipe end performance detection module is used to analyze the shaft maintenance expectations of each contour unit of the butt-welded pipeline, and to detect the docking performance degradation scale of each contour unit in real time.

[0008] The pipeline axis maintenance module is used to identify the maintenance requirements of each contour unit of the butt-welded pipeline and determine the butt-jointed axial coordinate line on the contour of the butt-welded pipeline axis.

[0009] The data analysis module for the preparation of pipeline operations is used to detect the layered structure of the soil on the pipeline jacking path, calculate the compressive strength of each soil layer area on the pipeline jacking path, and detect the degree of axial vacancy of the soil in each soil layer area on the pipeline jacking path, so as to determine the strength of the jacking operation for the preparation of the butt-welded pipe end.

[0010] The pipeline deformation risk identification module is used to analyze the deformation risk of the jacking operation of the prepared butt-welded pipe end according to the docking performance degradation scale of each contour unit and the jacking operation force of the prepared butt-welded pipe end.

[0011] The method for determining the butt-welded axial coordinate line on the axis contour of the butt-welded pipeline comprises: comparing the axis maintenance expectations of the contour units of the butt-welded pipeline with each other, calculating the average axis maintenance expectation, and then screening out the contour unit with the smallest difference between the axis maintenance expectation and the average axis maintenance expectation in the butt-welded pipeline, obtaining the axis coordinate path corresponding to the contour unit, and then using it as the butt-welded axial coordinate line on the axis contour of the butt-welded pipeline.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) By detecting the internal defects of the welds of the butt-jointed pipelines and the soil pressure conditions, the present invention can intuitively and quickly discover potential problems inside the welds, thereby avoiding the risk of reduced bearing capacity of the pipeline structure due to weld defects. At the same time, detecting the soil pressure conditions can reflect the stress state of the pipeline in the actual working environment, and define the external energy of each contour unit of the butt-jointed pipeline accordingly. In addition, by detecting the deformation of the geometric shape of the butt-jointed position, the internal energy of each contour unit of the butt-jointed pipeline is defined, which reflects the accuracy of the geometric shape of the weld and the butt-jointed position. Based on this, the degree of degradation of the butt-jointed performance of each contour unit is analyzed, and then it is determined whether to perform repair welding operations on each contour unit, which provides more accurate data support for pipeline maintenance and management, and helps to extend the service life of the pipeline and improve its overall performance.

[0013] (2) The present invention can timely discover the deformation or deviation that may occur in the pipeline during the welding process by detecting the axis inclination state and axis ovality of each contour unit of the butt-welded pipeline, analyze the maintenance expectations of the axis of each contour unit of the butt-welded pipeline, and judge whether to add steel pipe support measures for each contour unit. This targeted maintenance strategy not only avoids unnecessary maintenance costs, but also ensures the overall stability and safety of the pipeline.

[0014] (3) The present invention determines the docking axial coordinate line on the axial contour of the butt-welded pipeline based on the expectation of maintaining the axial body of each contour unit of the butt-welded pipeline, which can ensure that the pipeline maintains the correct direction and position during the docking process, and effectively avoids docking failure or safety hazards caused by misalignment or deflection. At the same time, according to the compressive strength of each soil layer area on the pipeline jacking path and the degree of axial vacancy of the soil, the jacking operation force of the prepared butt-welded pipeline end is determined, and then it is determined whether the soil around the pipeline jacking path is reinforced, which helps to ensure the smooth advancement of the pipeline when passing through different soil layers, and reduces pipeline damage or soil disturbance caused by excessive or insufficient jacking.

[0015] (4) The present invention analyzes the axial void degree of soil in each soil layer area on the pipeline jacking path, combines the docking performance degradation coefficient of each contour unit, and determines the deformation risk of the jacking operation of the prepared butt-welded pipe end. It can timely discover the potential deformation risk area, so as to take necessary preventive measures before the jacking operation, significantly improve the safety and reliability of the jacking operation, and effectively avoid pipeline deformation or damage caused by soil instability or insufficient docking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention.

[0018] Figure 2 This is a schematic diagram of the corresponding soil cover contour model of the pipeline completed by butt welding in the present invention.

[0019] Figure 3 It is a schematic diagram of the axis coordinate path corresponding to the contour unit of the present invention.

[0020] Figure 4 It is a schematic diagram of the layered structure of the soil on the pipeline jacking path of the present invention.

[0021] Figure numerals: 1. Several monitoring points arranged in the corresponding pipeline area of ​​each contour unit, 2. Coordinate connecting lines between the monitoring points on the side contours of the contour unit and the corresponding pipe sections of its adjacent contour units, 3. Each soil layer area. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 As shown, the present invention provides a pipe end deformation monitoring system for deep soil covering and long distance pipe jacking operation, the system comprising: a pipe soil covering contour model building module, a long distance pipe jacking end performance detection module, a pipe shaft maintenance module, a preparation pipe operation data analysis module, and a pipe deformation risk identification module.

[0024] The pipeline soil cover contour model construction module is connected to the long-distance jacking pipe end performance detection module, the long-distance jacking pipe end performance detection module is connected to the pipeline axis maintenance module, the pipeline axis maintenance module is connected to the preparation pipeline operation data analysis module, and the preparation pipeline operation data analysis module is connected to the pipeline deformation risk identification module.

[0025] The pipeline soil cover contour model construction module is used to record each pipe section of the butt-welded pipeline as each contour unit, numbered 1, 2, ...k..., b, construct the corresponding soil cover contour model of the butt-welded pipeline, and extract the pre-stored benchmark construction contour model of the butt-welded pipeline.

[0026] The long-distance jacking pipe end performance detection module is used to analyze the shaft maintenance expectations of each contour unit of the pipeline after butt welding, and to detect the docking performance degradation scale of each contour unit in real time.

[0027] See also Figure 2 As shown, in a preferred embodiment, the analysis of the axis maintenance expectations of each contour unit of the butt-welded pipeline includes: scanning and detecting the soil cover contour state of the butt-welded pipeline through geological exploration technology to obtain a corresponding soil cover contour model of the butt-welded pipeline, importing the corresponding soil cover contour model of the butt-welded pipeline into a regular coordinate system, arranging a number of monitoring points in the corresponding pipeline area of ​​each contour unit of the butt-welded pipeline, identifying the axis inclination coordinates of each monitoring point corresponding to each contour unit of the butt-welded pipeline, and similarly obtaining the axis coordinates of each monitoring point corresponding to each contour unit on the benchmark constructed contour model, and obtaining the axis inclination distance of each monitoring point corresponding to each contour unit of the butt-welded pipeline according to the three-dimensional coordinate distance calculation formula. , Indicates the number of the monitoring point. .

[0028] The geological exploration technology generally includes remote sensing technology, geographic information system (GIS) and other methods.

[0029] The regular coordinate system is specifically a three-dimensional space coordinate system constructed arbitrarily with the benchmark constructed contour model as the target object.

[0030] The specific content of arranging a number of monitoring points in the corresponding pipeline area of ​​each contour unit of the pipeline after butt welding is: evenly arranging each monitoring point on the side profile of the pipe section of each contour unit.

[0031] Scan the side profile of the corresponding pipe section of each contour unit of the butt-welded pipeline to obtain the maximum outer diameter on the side profile of the corresponding pipe section of each contour unit of the butt-welded pipeline and minimum outer diameter , and extract the nominal outer diameter of each contour unit in the benchmark contour model , calculate the ellipticity of the shaft of each contour unit of the butt-welded pipeline .

[0032] Analyze the shaft maintenance expectations of each contour unit of the butt welded pipeline ,in They represent the preset shaft tilt distance and shaft ellipticity reference values ​​respectively. Indicates the number of monitoring points.

[0033] In a further preferred embodiment, the process of detecting the docking performance degradation scale of each contour unit is as follows: obtaining the internal defects of the corresponding welds of each contour unit of the butt-welded pipeline by radiographic detection technology, and defining the external energy of each contour unit in the soil cover contour model of the butt-welded pipeline accordingly. .

[0034] The reference constructed contour model refers to the contour model when the butt welding operation is completed at each end of the pipe according to standard requirements.

[0035] The geometric curvature of each contour unit is extracted from the corresponding soil cover contour model of the butt-welded pipeline through model processing technology. , arc length ,Will As the circular cross-sectional diameter of each contour unit, calculate the section inertia moment of each contour unit , and obtain the inherent properties of pipeline materials for deep-covered and long-distance pipe jacking operations. The inherent properties of pipeline materials include elastic modulus and stress intensity factor, and define the internal energy of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline ,in Indicates the elastic modulus of the inherent properties of the pipeline in deep-covered and long-distance pipe jacking operations. Represents pi.

[0036] Construct the energy function of each contour unit of the butt-welded pipeline Similarly, the benchmark energy function of each contour unit of the butt-welded pipeline is constructed , compare and determine the docking performance reduction scale of each contour unit .

[0037] The reference energy function of each contour unit of the butt-welded pipeline refers to the initial energy function of each contour unit in the reference constructed contour model.

[0038] Specifically, when defects (such as cracks) appear in the weld at the butt joint of the pipe end, the presence of defects will lead to local stress concentration. According to the principle of fracture mechanics, the stress at the crack tip will be much higher than that in the normal area, and then additional defect energy will be generated at its local position. As the defect develops, such as crack expansion, the defect energy will continue to increase; due to the increase in the thickness of the covering soil, the change in the properties of the soil (such as the increase in pressure due to soil consolidation), or the additional pressure applied by new engineering activities nearby, when the soil pressure energy increases, the weld at the pipe end needs to withstand greater external force. If the strength and stiffness of the weld are not enough to resist this increased pressure, it will cause the pipe to deform, and this deformation will change the contour geometry of the weld and increase the internal energy. At the same time, when the internal energy increases, the bending stress at the butt joint of the pipe end increases, and the butt joint performance also decreases.

[0039] In a further preferred embodiment, the external energy of each contour unit in the soil cover contour model of the butt-welded pipeline is defined, including: extracting the crack length of each contour unit in the soil cover contour model of the butt-welded pipeline based on texture defect recognition technology According to linear elastic fracture mechanics, the energy release rate of crack extension is Expressed as ,in The stress intensity factor represents the inherent property of the pipeline material for long-distance pipe jacking operation with deep soil cover. Since the defect energy is related to the energy release rate of crack propagation, the crack defect energy of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline is expressed as .

[0040] The unit of stress intensity factor is actually a composite unit, which is composed of stress unit and crack length unit. Specifically, the stress unit is Pascal (Pa), and the crack length unit is meter (m). Therefore, the unit of stress intensity factor can be expressed as (or equivalently, ,because ).

[0041] The pipe wall thickness of each contour unit is extracted from the corresponding soil cover contour model of the butt-welded pipe through model processing technology. , Pipe surface area The vertical soil pressure of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline is detected by the pressure sensor. and lateral earth pressure , and then calculate the soil constraint energy of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline .

[0042] The pipeline advancement length of each contour unit refers to the soil cover length between the end butt joint position of each contour unit in the pipeline after butt welding and the end position of the inner end pipeline pushed forward.

[0043] Define the external energy of each contour element in the corresponding soil cover contour model of the butt-welded pipeline

[0044] ,in They respectively represent the corresponding preset weight coefficients of crack defect energy and soil constraint energy.

[0045] The pipeline axis maintenance module is used to determine the maintenance requirements of each contour unit of the pipeline that has been butt-welded, and determine the butt-jointed axial coordinate line on the contour of the pipeline axis that has been butt-welded.

[0046] In a preferred embodiment, the determination of the maintenance requirements of each contour unit of the butt-welded pipeline includes: comparing the butt-welding performance degradation scale of each contour unit with a preset butt-welding performance degradation scale baseline; if the butt-welding performance degradation scale of a contour unit exceeds the preset butt-welding performance degradation scale baseline, it indicates that the butt-welding defect state of the contour unit is excessive, and then a repair welding operation is performed on the welding position of the contour unit.

[0047] The shaft maintenance expectation of each contour unit is compared with the preset shaft maintenance expectation baseline. If the shaft maintenance expectation of a contour unit exceeds the preset shaft maintenance expectation baseline, it means that the pipe section of the contour unit bears excessive stress, and steel pipe support measures are added to the contour unit.

[0048] See also Figure 3 As shown, in a further preferred embodiment, the determination of the butt-welded axial coordinate line on the axis contour of the butt-welded pipe includes: comparing the axis maintenance expectations of each contour unit of the butt-welded pipe with each other, calculating the average axis maintenance expectation, and then screening out the contour unit with the smallest difference between the axis maintenance expectation and the average axis maintenance expectation in the butt-welded pipe, obtaining the axis coordinate path corresponding to the contour unit, and then using it as the butt-welded axial coordinate line on the axis contour of the butt-welded pipe.

[0049] The method for obtaining the corresponding axis coordinate path of the contour unit is: obtaining the coordinate connection line between each monitoring point on the side contour of the contour unit and the corresponding pipe segment of its adjacent contour unit, and then integrating them to obtain the coincidence line, which is recorded as the corresponding axis coordinate path of the contour unit.

[0050] By detecting the internal defects of the welds of the butt-jointed pipelines and the soil pressure conditions, the present invention can intuitively and quickly discover potential problems inside the welds, avoid the risk of reduced bearing capacity of the pipeline structure due to weld defects, and at the same time, detecting the soil pressure conditions can reflect the stress state of the pipeline in the actual working environment, and define the external energy of each contour unit of the butt-jointed pipeline accordingly. In addition, by detecting the deformation of the geometric shape of the butt-jointed position, the internal energy of each contour unit of the butt-jointed pipeline is defined, reflecting the accuracy of the geometric shape of the weld and the butt-jointed position, and analyzing the degree of butt-jointed performance degradation of each contour unit accordingly, and then judging whether to perform repair welding operations on each contour unit, providing more accurate data support for the maintenance and management of the pipeline, and helping to extend the service life of the pipeline and improve its overall performance.

[0051] The present invention can detect the axis inclination state and axis ovality of each contour unit of the butt-welded pipeline in a timely manner to discover possible deformation or deviation of the pipeline during the welding process, analyze the axis maintenance expectations of each contour unit of the butt-welded pipeline, and judge whether to add steel pipe support measures for each contour unit. This targeted maintenance strategy not only avoids unnecessary maintenance costs, but also ensures the overall stability and safety of the pipeline.

[0052] The preparation pipeline operation data analysis module is used to detect the layered structure of the soil on the pipeline jacking path, calculate the compressive strength of each soil layer area on the pipeline jacking path, and detect the axial vacancy degree of the soil in each soil layer area on the pipeline jacking path, and determine the jacking operation intensity of the preparation butt-welded pipeline end.

[0053] See also Figure 4 As shown, in a preferred embodiment, the layered structure of the soil on the pipeline jacking path is detected, including: detecting the layered structure of the soil on the pipeline jacking path by a geological exploration method (such as drilling or geophysical exploration), dividing it into various soil layer areas, and obtaining the soil cover depth of each soil layer area corresponding to each contour unit in the pipeline completed by welding in the deep-covered long-distance jacking operation, and various particle shapes of each soil component, and then detecting the corresponding internal friction angles of various particle shapes of each soil component based on the contour recognition technology, and obtaining the corresponding internal friction angle range of the particle shape of each soil component in each soil layer area. , Indicates the number of the soil layer area, , The number indicating the soil composition.

[0054] .

[0055] The internal friction angle is mainly used to describe the shear strength characteristics of sand. It refers to the angle between the normal stress and the shear stress on the shear surface under the limit equilibrium state. When sand is subjected to pressure, the sand particles will squeeze and displace each other. A large internal friction angle means that the bite between the sand particles is stronger. The sand particles will encounter greater resistance when sliding and rearranging each other. Therefore, the larger the internal friction angle of sand, the greater the compressive strength of the soil. Specifically, the range of internal friction angles varies for different soil types. For example, for loose fine sand, the internal friction angle is generally in the range of 2.48°. For pure clay, the internal friction angle is relatively small, generally around between.

[0056] Detect the soil cover depth and dry density of each soil layer area corresponding to each contour unit in the butt-welded pipeline, obtain the corresponding mean value, and obtain the balanced soil cover depth of each soil layer area on the pipeline jacking path , balanced dry density , calculate the compressive strength of each soil layer area on the pipeline jacking path , where Indicates the preset reference dry density, Indicates the preset reference soil cover depth. Indicates the amount of soil components.

[0057] The dry density refers to the mass of solid particles in unit volume of soil.

[0058] In a further preferred embodiment, the detection of the axial void degree of soil in each soil layer area on the pipeline jacking path includes: extracting the pipeline advancement length of each contour unit from the corresponding soil cover contour model of the butt-welded pipeline , and extract the balanced soil cover depth of each soil layer area on the pipeline jacking path , calculate the volume occupied by the pipeline of each contour unit in each soil layer area .

[0059] Through on-site monitoring methods (such as setting sensors around the pipeline to measure the displacement of the soil), the extrusion volume of the soil in each soil layer area corresponding to each contour unit during the pipeline jacking process is determined .

[0060] Obtain the jacking force of the corresponding butt joint end of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline , and obtain the contact area between the pipe of each contour unit and the soil in each soil layer area , the soil compression modulus of each soil layer area corresponding to each contour unit is obtained through the lateral pressure meter (on-site in-situ testing instrument) Based on this, the compression volume of each soil layer area corresponding to each contour unit during the pipeline jacking process is calculated .

[0061] Calculate the total volume of soil displaced in each soil layer area corresponding to each contour unit during the pipeline jacking process

[0062] , and then calculate the axial void degree of each soil layer area on the pipeline jacking path .

[0063] The occupied volume represents the original space occupied by the pipe in the soil layer.

[0064] The extrusion volume refers to the volume of soil that is displaced toward the surrounding area by the pipe when the pipe is pushed forward.

[0065] The compression volume refers to the volume of soil compressed around the pipe due to the pressure exerted by the pipe on the soil during the pipe jacking process.

[0066] Furthermore, the axial void degree of the soil in each soil layer area on the pipeline jacking path is summed and compared with the axial void degree index of the preset soil. When it exceeds the axial void degree index of the preset soil, the soil around the pipeline jacking path is reinforced.

[0067] In a further preferred embodiment, the determination of the jacking strength of the prepared butt-welded pipe end includes: integrating the compressive strength of each soil layer area on the pipeline jacking path and the axial void degree of the soil body into the resistance coefficient of each soil layer area on the pipeline jacking path , e is a natural constant.

[0068] The resistance coefficient of each soil layer area on the pipeline jacking path is multiplied by the preset unit resistance coefficient corresponding to the jacking operation force to obtain the corresponding jacking operation force of each soil layer area on the pipeline jacking path.

[0069] The selected butt-welded axial coordinate line on the axis contour of the butt-welded pipeline is overlapped and compared with each soil layer area, and the soil layer area with the largest overlapping area with the butt-welded axial coordinate line is screened out and located as the target soil layer area. Then, the corresponding jacking operation force of the target soil layer area is obtained and recorded as the jacking operation force of the prepared butt-welded pipeline end.

[0070] The present invention determines the docking axial coordinate line on the axial contour of the butt-welded pipeline based on the expectation of axial maintenance of each contour unit of the butt-welded pipeline, which can ensure that the pipeline maintains the correct direction and position during the docking process, and effectively avoids docking failure or safety hazards caused by misalignment or deflection. At the same time, according to the compressive strength of each soil layer area on the pipeline jacking path and the degree of axial vacancy of the soil, the jacking operation strength of the prepared butt-welded pipeline end is determined, and then it is judged whether the soil around the pipeline jacking path is reinforced, which helps to ensure the smooth advancement of the pipeline when passing through different soil layers, and reduces pipeline damage or soil disturbance caused by excessive or insufficient jacking.

[0071] The pipeline deformation risk identification module is used to analyze the deformation risk of the jacking operation of the prepared butt-welded pipeline end according to the docking performance degradation scale of each contour unit and the jacking operation strength of the prepared butt-welded pipeline end.

[0072] In a preferred embodiment, the analysis of deformation risk of the jacking operation of the prepared butt-welded pipe end includes: integrating the butt-welding performance degradation scale of each contour unit and the jacking operation strength of the prepared butt-welded pipe end into the deformation risk coefficient of the prepared steel pipe jacking operation , It indicates the strength of the pipe jacking operation for the prepared butt-welded pipe end. The deformation risk coefficient of the prepared steel pipe during the jacking operation is matched with the corresponding safety range of the preset deformation risk coefficient. If the deformation risk coefficient of the prepared steel pipe during the jacking operation does not exceed the corresponding safety range of the preset deformation risk coefficient, the pipe jacking operation is carried out along the axial coordinate line of the butt joint according to the pipe jacking operation strength of the prepared butt-welded pipe end. Otherwise, an operation maintenance warning is issued.

[0073] The present invention analyzes the axial void degree of soil in each soil layer area on the pipeline jacking path, combines the docking performance degradation coefficient of each contour unit, and determines the deformation risk of the jacking operation of the prepared butt-welded pipe end. It can timely discover the potential deformation risk area, so as to take necessary preventive measures before the jacking operation, such as strengthening soil support, adjusting the jacking force, etc., which significantly improves the safety and reliability of the jacking operation and effectively avoids pipeline deformation or damage caused by soil instability or insufficient docking performance.

[0074] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A pipe end deformation monitoring system for deep soil covering and long distance pipe jacking operation, characterized in that: The system includes: The pipeline soil cover contour model construction module is used to record each pipe section of the butt-welded pipeline as each contour unit, numbered 1, 2, ...k..., b, to construct the corresponding soil cover contour model of the butt-welded pipeline, and extract the pre-stored benchmark construction contour model of the butt-welded pipeline; The long-distance jacking pipe end performance detection module is used to analyze the shaft maintenance expectations of each contour unit of the butt-welded pipeline and detect the docking performance degradation scale of each contour unit in real time; The pipeline axis maintenance module is used to identify the maintenance requirements of each contour unit of the butt-welded pipeline and determine the butt-welded axial coordinate line on the contour of the pipeline axis. The data analysis module for preparing pipeline operations is used to detect the layered structure of the soil on the pipeline jacking path, calculate the compressive strength of each soil layer area on the pipeline jacking path, and detect the axial vacancy degree of the soil in each soil layer area on the pipeline jacking path, and determine the jacking operation strength of the prepared butt-welded pipeline end; The pipeline deformation risk identification module is used to analyze the deformation risk of the jacking operation of the prepared butt-welded pipe end according to the docking performance degradation scale of each contour unit and the jacking operation strength of the prepared butt-welded pipe end; The determining of the butt-jointed axial coordinate line on the axis contour of the butt-jointed pipeline comprises: comparing the axis maintenance expectations of the contour units of the butt-jointed pipeline with each other, calculating the average axis maintenance expectation, and then selecting the contour unit with the smallest difference between the axis maintenance expectation and the average axis maintenance expectation in the butt-jointed pipeline, obtaining the axis coordinate path corresponding to the contour unit, and then using it as the butt-jointed axial coordinate line on the axis contour of the butt-jointed pipeline; The process of detecting the butt joint performance degradation scale of each contour unit is as follows: the internal defects of the corresponding welds of each contour unit of the butt-welded pipeline are obtained by radiographic detection technology, and the external energy of each contour unit in the soil cover contour model of the butt-welded pipeline is defined accordingly. ; Extract the geometric curvature and arc length of each contour unit from the corresponding soil cover contour model of the butt-welded pipeline, and obtain the circular cross-sectional diameter of the pipe segment of each contour unit , calculate the section inertia moment of each contour unit, obtain the inherent properties of the pipeline material for deep-covered and long-distance pipe jacking operations, and define the internal energy of each contour unit in the corresponding soil cover contour model of the pipeline after welding ; Construct the energy function of each contour unit of the butt-welded pipeline Similarly, the benchmark energy function of each contour unit of the butt-welded pipeline is constructed , compare and determine the docking performance reduction scale of each contour unit ; The determination of the jacking strength of the prepared butt-welded pipe end includes: integrating the compressive strength of each soil layer area on the pipeline jacking path and the axial void degree of the soil body into the resistance coefficient of each soil layer area on the pipeline jacking path; The resistance coefficient of each soil layer area on the pipeline jacking path is multiplied by the preset unit resistance coefficient corresponding to the jacking operation force, so as to obtain the corresponding jacking operation force of each soil layer area on the pipeline jacking path; The selected butt-welded axial coordinate line on the axis contour of the butt-welded pipeline is overlapped and compared with each soil layer area, and the soil layer area with the largest overlapping area with the butt-welded axial coordinate line is screened out and located as the target soil layer area. Then, the corresponding jacking operation force of the target soil layer area is obtained and recorded as the jacking operation force of the prepared butt-welded pipeline end.

2. The pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations according to claim 1 is characterized in that: The analysis of the axis maintenance expectations of each contour unit of the butt-welded pipeline includes: scanning and detecting the soil cover contour state of the butt-welded pipeline through geological exploration technology to obtain the corresponding soil cover contour model of the butt-welded pipeline, importing the corresponding soil cover contour model of the butt-welded pipeline into a regular coordinate system, arranging a number of monitoring points in the corresponding pipeline area of ​​each contour unit of the butt-welded pipeline, identifying the axis inclination coordinates of each monitoring point corresponding to each contour unit of the butt-welded pipeline, and similarly obtaining the axis coordinates of each monitoring point corresponding to each contour unit on the benchmark constructed contour model, and obtaining the axis inclination distance of each monitoring point corresponding to each contour unit of the butt-welded pipeline according to the three-dimensional coordinate distance calculation formula. , Indicates the number of the monitoring point. ; Scan the side profile of the corresponding pipe section of each contour unit of the butt-welded pipeline to obtain the maximum outer diameter and minimum outer diameter on the side profile of the corresponding pipe section of each contour unit of the butt-welded pipeline, extract the nominal outer diameter of each contour unit in the benchmark contour model, and calculate the axial ovality of each contour unit of the butt-welded pipeline ; Analyze the shaft maintenance expectations of each contour unit of the butt welded pipeline ,in They represent the preset shaft tilt distance and shaft ellipticity reference values ​​respectively. Indicates the number of monitoring points.

3. The pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations according to claim 1 is characterized in that: The external energy of each contour unit in the soil cover contour model of the butt-welded pipeline is defined, including: extracting the crack length of each contour unit in the soil cover contour model of the butt-welded pipeline, obtaining the energy release rate of crack propagation, and then expressing the crack defect energy of each contour unit in the soil cover contour model of the butt-welded pipeline as ; Extract the pipe wall thickness of each contour unit from the corresponding soil cover contour model of the butt-welded pipe , Pipe surface area , and detect the vertical soil pressure in the corresponding area of ​​each contour unit in the corresponding soil cover contour model of the butt-welded pipeline and lateral earth pressure , and then calculate the soil constraint energy of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline ; Define the external energy of each contour element in the corresponding soil cover contour model of the butt-welded pipeline ,in They respectively represent the corresponding preset weight coefficients of crack defect energy and soil constraint energy.

4. The pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations according to claim 1 is characterized in that: The determination of the maintenance requirements of each contour unit of the butt-welded pipeline includes: comparing the butt-welding performance degradation scale of each contour unit with a preset butt-welding performance degradation scale baseline. If the butt-welding performance degradation scale of a contour unit exceeds the preset butt-welding performance degradation scale baseline, it indicates that the butt-welding defect state of the contour unit is excessive, and then a repair welding operation is performed on the welding position of the contour unit; The shaft maintenance expectation of each contour unit is compared with the preset shaft maintenance expectation baseline. If the shaft maintenance expectation of a contour unit exceeds the preset shaft maintenance expectation baseline, it means that the pipe section of the contour unit bears excessive stress, and steel pipe support measures are added to the contour unit.

5. The pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations according to claim 1 is characterized in that: The detection of the layered structure of the soil on the pipeline jacking path includes: detecting the layered structure of the soil on the pipeline jacking path by a geological exploration method, dividing it into various soil layer areas, and obtaining the soil cover depth of each soil layer area corresponding to each contour unit in the pipeline completed by welding in the deep-covered long-distance jacking operation, and various particle shapes of each soil component, and then detecting the corresponding internal friction angles of various particle shapes of each soil component based on the contour recognition technology, and obtaining the corresponding internal friction angle range of the particle shape of each soil component in each soil layer area , Indicates the number of the soil layer area, , The number indicating the soil composition. ; Detect the soil cover depth and dry density of each soil layer area corresponding to each contour unit in the butt-welded pipeline, obtain the corresponding mean value, and obtain the balanced soil cover depth of each soil layer area on the pipeline jacking path , balanced dry density , calculate the compressive strength of each soil layer area on the pipeline jacking path , where Indicates the preset reference dry density, Indicates the preset reference soil cover depth. Indicates the amount of soil components.

6. The pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations according to claim 5 is characterized in that: The detection of the axial void degree of soil in each soil layer area on the pipeline jacking path includes: extracting the pipeline advancement length of each contour unit from the corresponding soil cover contour model of the butt-welded pipeline, extracting the balanced soil cover depth of each soil layer area on the pipeline jacking path, and calculating the occupied volume of the pipeline of each contour unit in each soil layer area. ; Through on-site monitoring methods, the extrusion volume of soil in each soil layer area corresponding to each contour unit during the pipeline jacking process is determined ; The jacking force of the corresponding butt joint end of each contour unit in the corresponding soil cover contour model of the butt-welded pipeline is obtained, and the contact area between the pipeline and the soil in each soil layer area of ​​each contour unit is obtained. The soil compression modulus of each soil layer area corresponding to each contour unit is obtained through the lateral pressure meter, and the compression volume of each soil layer area corresponding to each contour unit during the pipeline jacking process is calculated accordingly. ; Calculate the total volume of soil displaced in each soil layer area corresponding to each contour unit during the pipeline jacking process , and then calculate the axial void degree of each soil layer area on the pipeline jacking path ; Furthermore, the axial void degree of the soil in each soil layer area on the pipeline jacking path is summed and compared with the axial void degree index of the preset soil. When it exceeds the axial void degree index of the preset soil, the soil around the pipeline jacking path is reinforced.

7. The pipe end deformation monitoring system for deep-covered and long-distance pipe jacking operations according to claim 1 is characterized in that: The analysis of deformation risk of the jacking operation of the prepared butt-welded pipe end includes: integrating the butt performance degradation scale of each contour unit and the jacking operation force of the prepared butt-welded pipe end into a deformation risk coefficient during the jacking operation of the prepared steel pipe, matching it with a preset safety range corresponding to the deformation risk coefficient; if it does not exceed the preset safety range corresponding to the deformation risk coefficient, the jacking operation is performed along the butt axial coordinate line according to the jacking operation force of the prepared butt-welded pipe end; otherwise, an operation maintenance warning is issued.

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