Building split bolt stress monitoring system and method

Abstract

The invention relates to the technical field of stress monitoring, in particular to a building split bolt stress monitoring system and method, which comprehensively analyzes key parameters such as earthwork cracks, bolt stress and equipment vibration through multi-source data fusion such as image acquisition, mechanical sensing and vibration monitoring, avoids misjudgment of a single index, and improves the accuracy of monitoring. Meanwhile, earthwork viscosity, crack analysis and vibration influence are introduced, the collapse danger is accurately quantified, compared with traditional manual inspection or single sensor monitoring, the method can find hidden risks earlier, the early warning accuracy is remarkably improved, the false alarm rate is reduced, differential reinforcement measures are intelligently matched on the basis of quantitative grading of collapse danger values, and the safety of the collapse is improved. According to the dynamic strategy, resource waste caused by excessive reinforcement is avoided, key risk points are ensured to be quickly disposed, safety and economy are both considered, and the method is suitable for multi-point collaborative management of large-scale projects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stress monitoring, in particular to a structure tension bolt stress monitoring system and method. BACKGROUND

[0002] In the process of foundation pit support, slope protection and underground engineering construction, soil collapse is one of the main risks threatening engineering safety. Traditional protection measures mainly rely on passive methods such as bolt anchoring, concrete jet anchoring, soil nailing wall reinforcement, etc. Although they can provide short-term stability, they have the following technical defects: Firstly, traditional methods rely on manual inspection or single sensor (such as strain gauge) monitoring of bolt stress, which cannot capture microscopic deformation such as bolt loosening and thread wear in real time. For example, it is difficult to identify fatigue damage of bolts caused by vibration through stress data alone, and manual inspection cannot cover defects in hidden parts. Soil stability assessment relies on surface crack observation or sampling detection, lacking quantitative analysis of deep risks such as internal crack propagation and cohesion degradation of soil, and is prone to miss sudden collapse; Secondly, bolt stress monitoring and soil state monitoring (such as cracks and vibrations) are usually completed by independent systems, and data is difficult to link. For example, soil crack propagation may cause redistribution of bolt stress, but traditional methods cannot establish a correlation model between the two, resulting in lag in protective measures. Equipment vibration data (such as frequency and amplitude) are not included in the collapse risk assessment system, and vibration sources such as excavators and pile drivers in actual engineering will significantly accelerate soil structure deterioration and bolt loosening; Finally, existing technologies mostly use fixed reinforcement schemes (such as full-face grouting), which cannot adjust measures according to the dynamic risk level of the soil-bolt system. For example, high-risk areas may require micro-pile + grouting composite reinforcement, while low-risk areas only need local reinforcement, but traditional methods lack precise grading response mechanisms; In view of this, the applicant proposes a structure tension bolt stress monitoring system and method. SUMMARY

[0003] In order to overcome the defects and deficiencies of the prior art, the present application provides a structure tension bolt stress monitoring system and method, which can detect hidden risks earlier, significantly improve the accuracy of early warning, and reduce the false alarm rate.

[0004] In order to achieve the above purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a structure tension bolt stress monitoring method, comprising the following steps: S100, obtain the bolt connection condition of the structure and the stress condition of the bolt connection node, and simultaneously obtain the soil condition at the corresponding position and the equipment operation vibration condition; S200, based on the corresponding position earthwork condition and the equipment operation vibration condition, the corresponding position earthwork collapse abnormality is analyzed; S300, based on the construction bolt connection condition and the stress condition of the bolt connection node, the corresponding earthwork area protection effectiveness is analyzed; S400, through the corresponding position earthwork collapse abnormality analysis result and the corresponding earthwork area protection effectiveness analysis result, the collapse danger is analyzed; S500, through the collapse danger analysis result of each position, the position reinforcement strategy is output.

[0005] In an implementation manner of the present application, the step S100 comprises the following specific contents: Step 110, through the image acquisition terminal, the image condition of the bolt of each position corresponding construction is acquired, and through the mechanical sensor, the stress condition data of the corresponding bolt connection position is acquired, the mechanical sensor is installed at the bolt stress part to perform mechanical monitoring, and the bolt stress abnormality is analyzed through the image condition of the bolt and the stress condition; Step 120, through the sensor, the surface crack condition, the earthwork volume condition and the soil adhesion condition of the corresponding earthwork are acquired, the collapse degree of the soil under the vibration action is predicted, so that the stress abnormality of the bolt is predicted, wherein the corresponding data can be acquired through the corresponding sensor; Step 130, through the vibration sensor, the vibration condition of the equipment operation in the construction process is acquired, wherein the vibration amplitude and the vibration frequency condition of each corresponding position of the earthwork are included; Step 140, the acquired data is stored in the corresponding storage component for subsequent calling and using.

[0006] In an implementation manner of the present application, the step S200 of the corresponding position earthwork collapse abnormality analysis comprises the following specific steps: Step 210, the surface crack condition, the earthwork quality condition and the soil adhesion condition of the corresponding earthwork are acquired, wherein the quality is acquired by multiplying the density by the volume, wherein the earthwork damage analysis process is: the average number, width, length and depth conditions of the cracks of the corresponding unit volume earthwork are acquired, these can be acquired by imaging or can be acquired by field measurement, the average crack volume on the unit volume earthwork is acquired by multiplying the average width, length and depth of the cracks of the corresponding unit volume earthwork, the earthwork damage analysis result is obtained by dividing the average crack volume on the unit volume earthwork by the safe crack volume, and the surface crack condition and the soil adhesion of the earthwork are quantified; Step 220, obtain the earthwork abnormality of adhesion by dividing the safety adhesion of the earthwork by the adhesion of the corresponding earthwork, obtain the earthwork safety abnormality by weighted sum of the earthwork damage analysis result and the earthwork abnormality of adhesion, obtain the quality abnormal value by dividing the quality of the earthwork by the corresponding safety quality of the structure, and obtain the initial earthwork abnormality by multiplying the quality abnormal value and the earthwork safety abnormality; Step 230, obtain the corresponding equipment vibration abnormality by multiplying the standardized vibration frequency and the vibration amplitude data of the corresponding position during the operation of the equipment, the equipment vibration is an important factor causing the collapse of the earthwork, analyze the aggravating influence of the equipment vibration abnormality on the earthwork abnormality, quantify the influence of the equipment vibration on the earthwork, identify the key parameters of the vibration aggravating collapse risk, the vibration frequency and amplitude directly affect the soil particle structure, and high-frequency or strong-amplitude vibration can reduce the stability of the soil; Step 240, obtain the equipment vibration influence by multiplying the corresponding equipment vibration abnormality by the equipment influence coefficient, obtain the equipment influence abnormality of the earthwork by multiplying the equipment vibration influence by the initial earthwork abnormality, and obtain the analysis result of the earthwork collapse abnormality by adding the equipment influence abnormality of the earthwork and the initial earthwork abnormality, comprehensively analyze the earthwork itself abnormality and the equipment vibration influence, provide more accurate collapse risk evaluation, the vibration can aggravate the initial earthwork abnormality, and the influence coefficient is used to quantify the superposition effect.

[0007] In an implementation manner of the present application, the protection effectiveness analysis in the step S300 specifically includes the following specific contents. Step 310, obtain the image condition of the corresponding structure bolt of each position and the stress condition data of the corresponding bolt connection position obtained by the mechanical sensor, verify the bolt state by the image and the mechanical sensor data, ensure the comprehensiveness and accuracy of detection, and avoid misjudgment caused by a single data source; Step 320, obtain the image abnormality of the bolt by the change amount of the image condition of the corresponding structure bolt and the image condition of the starting bolt, wherein the specific method of the image abnormality of the bolt is that the image abnormality of the bolt is obtained by dividing the volume of the deformed position of the bolt corresponding to the structure bolt and the image condition of the starting bolt by the image volume of the starting bolt, and the standard volume of the bolt is obtained by 3D scanning or a CAD model during initial installation; Step 330, obtain the stress abnormality of the bolt by dividing the stress condition data of the corresponding bolt connection position by the maximum value of the safety stress of the corresponding bolt connection, directly reflect whether the bolt is in an overload dangerous state by the ratio of the actual stress and the safety threshold value, the bolt failure is often caused by stress overrun, and the standardized stress abnormality value can quickly locate the high-risk point; Step 340, the bolt protection performance anomaly is obtained by weighted summation of the bolt image anomaly and the bolt stress anomaly, the deformation anomaly and the stress anomaly are comprehensively evaluated, the overall safety of the bolt is evaluated, the one-sided conclusion caused by relying on a single index is avoided, the bolt failure is the result of the combined action of deformation accumulation and stress overrun, and the weighted summation can more comprehensively reflect the risk level.

[0008] In an implementation form of the present application, the step S400 of collapse risk analysis comprises the following specific contents: The obtained soil collapse anomaly analysis results at each position and the bolt protection performance anomaly are weighted and summed after being standardized to obtain the collapse risk analysis results at each position, the collapse risk analysis results at each position are compared with the set collapse risk analysis threshold, and positions with the collapse risk analysis results greater than or equal to the set collapse risk analysis threshold are set as collapse risk areas, and positions with the collapse risk analysis results less than the set collapse risk analysis threshold are set as safe areas.

[0009] In an implementation form of the present application, the step S500 of outputting the reinforcement strategy comprises the following specific contents: If the collapse risk analysis result of the collapse risk area is greater than or equal to 1.5 times the set collapse risk analysis threshold, the collapse risk area is set as a high-risk area, and one or more reinforcement strategies are selected from the following modes: grouting is used to reinforce and stabilize loose soil bodies; micro piles or soil nailing walls are additionally arranged to enhance the slope anti-slide; high-strength bolts are replaced; anti-loosening washers or double-nut bolts are additionally arranged to prevent further loosening; If the collapse risk analysis result of the collapse risk area is less than 1.5 times the set collapse risk analysis threshold, the collapse risk area is set as a low-risk area, and one or more reinforcement strategies are selected from the following modes: soil geogrids or sprayed concrete surface layers are laid to prevent surface peeling, and local slope cutting is used to reduce the soil pressure; the bolts are retightened to the design torque; the deformed bolts are coated with corrosion-resistant sealant to delay corrosion.

[0010] In a second aspect, the present application further provides a construction structure tension bolt stress monitoring system, comprising: A data acquisition module acquires the bolt connection condition of the construction structure and the stress condition of the bolt connection node, and simultaneously acquires the soil condition at the corresponding position and the equipment operation vibration condition. A collapse anomaly analysis module performs soil collapse anomaly analysis at the corresponding position based on the soil condition at the corresponding position and the equipment operation vibration condition. A protection performance analysis module performs protection performance analysis of the corresponding soil area based on the bolt connection condition of the construction structure and the stress condition of the bolt connection node. The collapse danger analysis module analyzes the collapse danger by corresponding position earthwork collapse anomaly analysis results and corresponding earthwork area protection effectiveness analysis results; The reinforcement strategy output module outputs the position reinforcement strategy by the collapse danger analysis results of each position.

[0011] In a third aspect, the present application provides an electronic device, comprising a processor and a memory, wherein the memory stores a computer program that can be called by the processor, and the processor executes a construction bolt stress monitoring method by calling the computer program stored in the memory.

[0012] In a fourth aspect, the present application provides a computer readable storage medium storing instructions, which, when executed on a computer, cause the computer to execute a construction bolt stress monitoring method.

[0013] Compared with the prior art, the present application has the following advantages and beneficial effects: 1. The present application comprehensively analyzes key parameters such as earthwork cracks, bolt stress, and equipment vibration by multi-source data fusion such as image acquisition, mechanical sensing, and vibration monitoring, avoids misjudgment of a single indicator, introduces earthwork viscosity, crack analysis, and vibration influence, accurately quantifies collapse danger, and compared with traditional manual inspection or single sensor monitoring, the method can discover hidden risks earlier, significantly improves early warning accuracy, and reduces false positive rate.

[0014] 2. Based on the quantification and grading of the collapse danger value, the differential reinforcement measures are intelligently matched, which avoids resource waste caused by excessive reinforcement, ensures that key risk points are quickly disposed, and balances safety and economy, and is suitable for multi-point collaborative management of large-scale projects. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings: Figure 1 The figure is a schematic diagram of the overall flow structure of the method embodiment of the present application; Figure 2 The figure is a schematic diagram of the flow structure of S200 of the method embodiment of the present application; Figure 3 The figure is a schematic diagram of the flow structure of S300 of the method embodiment of the present application; Figure 4 The figure is a schematic diagram of the module composition structure of the system embodiment of the present application; Figure 5 The figure is a schematic diagram of the technical structure of the present application. DETAILED DESCRIPTION

[0016] The technical scheme of the present application will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the present application, but not limitations of the technical scheme of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0017] Please refer to Figures 1 to 3 , Figure 1 is a whole flowchart of a structure bolt stress monitoring method provided by an embodiment of the present application, and specifically includes the following steps: S100, acquiring bolt connection conditions of a structure and stress conditions of bolt connection nodes, and simultaneously acquiring earthwork conditions at corresponding positions and equipment operation vibration conditions; In one specific embodiment, step S100 includes the following specific contents: Step 110, acquiring image conditions of bolts of the structure at various positions through an image acquisition terminal, and simultaneously acquiring stress condition data of corresponding bolt connection positions through a mechanical sensor. The mechanical sensor is installed at a bolt stress position to perform mechanical monitoring. The bolt stress abnormality is analyzed through the image conditions of the bolts and the stress conditions thereof; Step 120, acquiring surface crack conditions of corresponding earthworks, earthwork volume conditions, and soil adhesion conditions through a sensor to predict collapse degree of the soil under vibration, so as to predict stress abnormality of the bolts. Corresponding data can be acquired through corresponding sensors, for example, the surface crack conditions of the earthworks can be acquired through an image sensor; Step 130, acquiring vibration conditions of equipment operation in a construction process through a vibration sensor, including vibration amplitude and vibration frequency conditions of various corresponding positions of the earthworks. It should be noted that the vibration amplitude and the vibration frequency can be acquired through experiments. Specifically, the sensor can acquire the vibration amplitude and the vibration frequency at corresponding distances after the equipment is normally operated; Step 140, storing the acquired data in a corresponding storage component for subsequent retrieval and use; S200, performing corresponding position earthwork collapse abnormality analysis based on the earthwork conditions at the corresponding positions and the equipment operation vibration conditions; In one specific embodiment, the corresponding position earthwork collapse abnormality analysis in step S200 includes the following specific steps: Step 210, obtaining the surface crack condition, soil mass condition and soil adhesion condition of the corresponding earthwork, wherein the mass is obtained by multiplying the density by the volume, and the soil adhesion index can be represented by the cohesion force, which is obtained by experiment, and the cohesion force is the adsorption force between the particles in the soil body, which is usually represented by kPa (kiloPascal) or kN / m² (kiloNewton / m²). The soil damage analysis is carried out through the crack condition of the earthwork surface, wherein the soil damage analysis process is as follows: obtaining the average number, width, length and depth condition of the cracks of the corresponding unit volume of earthwork, which can be obtained by imaging or by on-site measurement, obtaining the average crack volume on the unit volume of earthwork by multiplying the average width, length and depth of the cracks of the corresponding unit volume of earthwork, and obtaining the soil damage analysis result by dividing the average crack volume on the unit volume of earthwork by the safe crack volume. By quantifying the surface crack condition of the earthwork and the soil adhesion, the integrity of the soil structure can be systematically evaluated, and potential collapse risks can be detected in advance. Step 220, obtaining the soil adhesion anomaly by dividing the safe adhesion condition of the soil of the earthwork by the adhesion condition of the soil of the corresponding earthwork, obtaining the soil safety anomaly by weighted summing the soil damage analysis result and the soil adhesion anomaly, obtaining the quality anomaly value by dividing the mass condition of the earthwork by the corresponding safe protection mass of the structure, and obtaining the initial anomaly of the earthwork by multiplying the quality anomaly value and the soil safety anomaly. By combining the soil damage and adhesion anomaly, the stability of the earthwork is comprehensively evaluated to avoid misjudgment of a single indicator. The collapse of the earthwork is the result of the combined action of soil mass, crack development and adhesion. Weighted summing can more comprehensively reflect the risk. Step 230, obtaining the vibration frequency and amplitude data of the corresponding position during the operation of the equipment, and obtaining the equipment vibration anomaly by multiplying the standardized vibration frequency and amplitude. Equipment vibration is an important factor leading to the collapse of the earthwork. The aggravating effect of equipment vibration anomaly on the earthwork anomaly is analyzed to quantify the influence of equipment vibration on the earthwork and identify the key parameters of vibration aggravating collapse risk. Vibration frequency and amplitude directly affect the particle structure of the soil body. High frequency or strong amplitude vibration can reduce the stability of the soil body. Step 240, obtaining the equipment vibration influence by multiplying the corresponding equipment vibration anomaly by the equipment influence coefficient, obtaining the equipment influence anomaly of the earthwork by multiplying the equipment vibration influence by the initial anomaly of the earthwork, and obtaining the analysis result of the collapse anomaly of the earthwork by adding the equipment influence anomaly of the earthwork and the initial anomaly of the earthwork. By comprehensively considering the earthwork anomaly and the equipment vibration influence, a more accurate collapse risk evaluation is provided. Vibration can aggravate the initial anomaly of the earthwork. The superposition effect is quantified by the influence coefficient. S300, performing protection effectiveness analysis on the corresponding earthwork area based on the bolt connection condition of the structure and the stress condition of the bolt connection node. In one specific embodiment, the protection effectiveness analysis in step S300 specifically includes the following specific contents: Step 310, obtain the image condition of the corresponding structure bolt at each position and the stress condition data of the corresponding bolt connection position obtained by the mechanical sensor, verify the bolt state through image and mechanical sensor data, ensure the comprehensiveness and accuracy of detection, avoid misjudgment caused by a single data source, bolt loosening or damage is usually accompanied by deformation (such as thread misplacement, bolt elongation) and stress anomaly (such as overload or stress concentration), image analysis can directly capture the deformation characteristics, and the mechanical sensor can quantify the actual stress condition, and the combination of the two can improve the detection reliability; Step 320, obtain the image anomaly of the bolt by the change amount of the image condition of the corresponding structure bolt and the image condition of the starting bolt, wherein the specific way of the image anomaly of the bolt is: the volume of the deformation position of the bolt corresponding to the image condition of the corresponding structure bolt and the image condition of the starting bolt is divided by the image volume of the starting bolt to obtain the image anomaly of the bolt, the standard volume of the bolt (such as the volume of M20 bolt is 5 cm³) is obtained by 3D scanning or CAD model at initial installation, the deformation part volume (such as 0.2 cm³) is calculated by difference analysis (such as pixel comparison, point cloud modeling) of the current image and the starting image, the deformation degree of the bolt is quantified, the visual change is converted into a numerical index, which is convenient for automatic judgment whether the bolt exceeds the safe deformation range, the deformation volume (such as thread wear, bolt bending) of the bolt is directly related to the decrease of its mechanical performance, the larger the deformation volume ratio is, the higher the failure risk is; Step 330, obtain the stress anomaly of the bolt by dividing the stress condition data of the corresponding bolt connection position by the maximum value of the safe stress of the corresponding bolt connection, the maximum value of the safe stress is referred to the design specification (such as the safe stress of steel structure bolt is 400 MPa), the ratio of the actual stress to the safety threshold directly reflects whether the bolt is in an overload danger state, bolt failure is often caused by stress overrun (such as fatigue fracture), and the standardized stress anomaly value can quickly locate the high-risk point; Step 340, obtain the protection efficiency anomaly of the bolt by weighted sum of the image anomaly of the bolt and the stress anomaly of the bolt, comprehensively analyze the deformation and stress anomaly, and evaluate the overall safety of the bolt to avoid one-sided conclusion caused by relying on a single index, and the bolt failure is the result of the combined action of deformation accumulation and stress overrun, and the weighted sum can more comprehensively reflect the risk level; S400, carry out collapse danger analysis through the collapse anomaly analysis result of the corresponding position and the protection efficiency analysis result of the corresponding earthwork area; In one specific embodiment, the collapse danger analysis in step S400 includes the following specific contents: The obtained soil collapse abnormal analysis results at each position and the bolt protection effectiveness abnormality are standardized and weighted summed to obtain collapse danger analysis results corresponding to each position. The collapse danger analysis results corresponding to each position are compared with a set collapse danger analysis threshold value, and positions with collapse danger analysis results greater than or equal to the set collapse danger analysis threshold value are set as collapse danger areas, and positions with collapse danger analysis results less than the set collapse danger analysis threshold value are set as safe areas. S500, outputting a position reinforcement strategy through the collapse danger analysis results of each position; In one specific embodiment, the output of the reinforcement strategy in step S500 includes the following specific contents: If the collapse danger analysis result of the collapse danger area is greater than or equal to 1.5 times the set collapse danger analysis threshold value, the collapse danger area is set as a high-risk area, and one or more of the following reinforcement strategies is selected: using grouting reinforcement (high-pressure injection of cement slurry or chemical slurry) to stabilize loose soil; adding micro piles or soil nailing walls to enhance slope anti-slide; replacing high-strength bolts; adding anti-loose washers or double nuts to prevent further loosening; the threshold value is obtained by historical data experiments; If the collapse danger analysis result of the collapse danger area is less than 1.5 times the set collapse danger analysis threshold value, the collapse danger area is set as a low-risk area, and one or more of the following reinforcement strategies is selected: laying geogrids or spraying concrete surface layers to prevent surface peeling, local slope cutting to reduce load and lower soil pressure; retightening the bolts to the design torque; applying corrosion-resistant sealant to the deformed bolts to delay corrosion; For example, in a deep foundation pit project, the monitoring system performs real-time collapse danger analysis on the west side slope (the safety threshold value is set to 100 points, and the stress, crack, vibration and other parameters are calculated to obtain the result); First example, high-risk area treatment: case: a certain area is detected to have a danger index of 180 points (more than 1.5 times the threshold value); high-risk reason: bolt stress exceeds the limit, internal soil cracks expand, and equipment vibrates frequently; high-risk reinforcement measures: grouting reinforcement: high-pressure injection of cement slurry (pressure 1.5 MPa) to fill soil cracks; enhanced support: adding micro piles (spacing 1.2 meters) to cooperate with the original soil nails; bolt replacement: replacing 3 deformed bolts with 10.9 grade bolts with higher strength; anti-loose treatment: all bolts are installed with anti-loose washers + double nuts, and are retightened to 120 N·m; the effect after reinforcement: after grouting, it is detected that the slurry diffusion meets the standard, and the bolt stress is reduced by 31.08%; Second example, low-risk area treatment; low-risk situation: another area has a danger index of 120 points (not reaching 1.5 times the threshold value); low-risk reason: surface soil peeling, individual bolt corrosion Low-risk reinforcement measures: surface protection: laying high-strength geogrid and spraying 10 cm concrete; load reduction measures: cutting slope and removing 15 cubic meters of loose soil; bolt maintenance: retightening bolts to 90 N.m, and applying sealant to rusted parts; effect after reinforcement: bolt stress decreased by 12.21% after retightening, and no new cracks appeared on the surface; In the present embodiment, the weight of each weighted sum is obtained in the following manner: the weight is obtained in the following manner: a parametric model is established using finite element software (such as ABAQUS), the sensitivity indexes of parameters such as soil crack width, cohesion, vibration amplitude, etc. are analyzed by Monte Carlo simulation or orthogonal test design, and are normalized to serve as the basis for the weight; by way of example, using the pre-processing module of ABAQUS, a three-dimensional geometric model including the soil and related structures (such as bolt support) is constructed according to the geological conditions and structural characteristics of the actual project; for example, for a foundation pit project, the soil, support piles and support structures of the foundation pit are constructed, factors that can affect collapse (such as soil cracks) are embodied in the form of geometric characteristics, such as creating cracks of different widths in the soil model, defining material properties for the soil and structural components. The soil material can use a suitable constitutive model, such as the Mohr-Coulomb model, and input the cohesion, internal friction angle and other parameters of the soil according to the actual situation; for structural components such as bolts, define their elastic modulus, Poisson's ratio and other mechanical properties, divide the geometric model into meshes, ensure mesh quality, especially in critical areas such as cracks, use denser meshes to improve calculation accuracy, define the parameters to be analyzed (such as soil crack width, cohesion, vibration amplitude, etc.) as variables for subsequent parametric analysis, in ABAQUS, parametric modeling can be achieved using Python scripts, related properties of the model can be changed by modifying the parameter values in the script, for each parameter (such as soil crack width, cohesion, vibration amplitude), determine its probability distribution according to historical data or engineering experience.For example, the soil crack width may be subject to a normal distribution, the cohesion may be subject to a lognormal distribution, the parameters of the distribution, such as the mean, the standard deviation, etc., are determined, a programming language (such as Python) is used to generate a large number of random samples, each sample contains a set of parameter values, for example, 1000 different combinations of soil crack width, cohesion and vibration amplitude are generated, these samples are sequentially input into the parameterized model of ABAQUS for calculation, ABAQUS is used to perform finite element analysis on the model corresponding to each sample to obtain the corresponding results (such as the displacement of the soil, stress, etc.), statistical methods are used to analyze the degree of influence of each parameter on the results, a commonly used method is to calculate the correlation coefficient between each parameter and the result, the larger the absolute value of the correlation coefficient, the more significant the influence of the parameter on the result; determine the factors to be analyzed, i.e. soil crack width, cohesion, vibration amplitude, etc.; determine several levels for each factor, for example, the soil crack width can be set to 3 levels: 5mm, 10mm, 15mm; the cohesion is set to 3 levels: 20kPa, 30kPa, 40kPa; the vibration amplitude is set to 3 levels: 0.5mm, 1mm, 1.5mm; according to the number of factors and levels, select a suitable orthogonal table; for example, for a 3-factor 3-level test; determine the test scheme according to the orthogonal table, i.e. the combination of different factor levels; for example, a row in the orthogonal table represents a set of tests, which contains a specific combination of soil crack width, cohesion and vibration amplitude; input the parameter values corresponding to each test scheme into the parameterized model of ABAQUS for finite element analysis to obtain the corresponding results; calculate the average value of the results at different levels of each factor, and determine the primary and secondary order of the factors by comparing the differences between these average values; for example, calculate the average value of the maximum displacement of the soil at 3 levels of soil crack width, if the difference between the average values at different levels is large, it indicates that the soil crack width has a greater impact on the displacement of the soil; obtain the sensitivity index of each parameter (such as the correlation coefficient, the numerical value corresponding to the primary and secondary order of the factors, etc.) through Monte Carlo simulation or orthogonal test design, and use these indexes as the sensitivity index; normalize the sensitivity index, so that the sum of the sensitivity indexes of all parameters is 1. The normalization method is to divide the sensitivity index of each parameter by the sum of the sensitivity indexes of all parameters.

[0018] Please refer to Figure 5 , Figure 5 The technical structure diagram of the present application, the benefits of the above embodiments are: through image acquisition, mechanical sensing, vibration monitoring and other multi-source data fusion, comprehensive analysis of key parameters such as soil crack, bolt stress, equipment vibration, etc., to avoid single index misjudgment, at the same time, introduce soil viscosity, crack analysis and vibration influence, accurately quantify the collapse risk, compared with traditional manual inspection or single sensor monitoring, this method can discover hidden risks earlier, significantly improve the warning accuracy and reduce the false alarm rate.

[0019] Please refer to Figure 4 , Figure 4 is a structural diagram of a structure bolt stress monitoring system provided by an embodiment of the application, comprising: The data acquisition module acquires bolt connection conditions of the structure and stress conditions of bolt connection nodes, simultaneously acquires earthwork conditions at corresponding positions and equipment operation vibration conditions, the collapse abnormality analysis module performs collapse abnormality analysis of earthwork at corresponding positions based on the earthwork conditions at the corresponding positions and the equipment operation vibration conditions, the protection effectiveness analysis module performs protection effectiveness analysis of corresponding earthwork regions based on the bolt connection conditions of the structure and the stress conditions of the bolt connection nodes, the collapse danger analysis module performs collapse danger analysis by using the collapse abnormality analysis results of the earthwork at the corresponding positions and the protection effectiveness analysis results of the corresponding earthwork regions, and the reinforcement strategy output module outputs position reinforcement strategies by using the collapse danger analysis results of the positions.

[0020] The above steps of implementing corresponding functions of each parameter and each unit module in the structure bolt stress monitoring system can refer to each parameter and step in the embodiment of the structure bolt stress monitoring method, and details are not repeated here.

[0021] The embodiment of the application further provides an electronic device, which comprises a memory, a processor and a communication bus; the memory and the processor are connected through the communication bus. The memory stores a method for monitoring bolt stress of a structure provided by the above embodiment, which can be loaded and executed by the processor.

[0022] The memory can be used for storing instructions, programs, codes, code sets or instruction sets. The memory 310 can comprise a storage program area and a storage data area, wherein the storage program area can store instructions for implementing an operating system, instructions for at least one function and instructions for implementing the method for monitoring bolt stress of a structure provided by the above embodiment, etc.; and the storage data area can store data involved in the method for monitoring bolt stress of a structure provided by the above embodiment, etc.

[0023] The processor can include one or more processing cores. The processor invokes data stored in the memory by running or executing instructions, programs, code sets, or instruction sets stored in the memory, performs various functions of the present application, and processes data. The processor can be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor. It can be understood that, for different devices, the electronic device used to implement the functions of the processor 320 described above can also be other, and the embodiments of the present application are not limited specifically.

[0024] The communication bus can include a path for transmitting information between the above-mentioned components. The communication bus 330 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0025] The embodiment of the present application provides a computer readable storage medium, which stores a computer program capable of being loaded and executed by a processor to perform a structure-to-pull bolt stress monitoring method provided by the above-mentioned embodiment.

[0026] In the embodiment of the present application, the computer readable storage medium can be a tangible device that maintains and stores instructions for use by an instruction execution device. The computer readable storage medium can be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination of the above. Specifically, the computer readable storage medium can be a portable computer disk, a hard disk, a U disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a stand-alone random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, an optical disk, a magnetic disk, a mechanical coding device, and any combination of the above.

[0027] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0028] The description above only concerns preferred embodiments of the application and the explanation of the principles of the technology used. The person skilled in the art will understand that the scope of the application is not limited to the technical solutions formed by the specific combinations of the technical features described above, but also covers other technical solutions formed by any combinations of the technical features described above or their equivalent features without deviating from the concept of the application. For example, the technical solutions formed by the mutual replacement of the above-mentioned features and the technical features applied in the application (but not limited to) having similar functions.

Claims

1. A method of monitoring the stress of a tie bolt of a structure, characterized by, It comprises the following steps: S100, acquiring the bolt connection condition of the structure and the stress condition of the bolt connection node, and simultaneously acquiring the earthwork condition at the corresponding position and the equipment operation vibration condition; S200, performing corresponding position earthwork collapse anomaly analysis based on the corresponding position earthwork condition and the equipment operation vibration condition; S300, performing corresponding earthwork area protection effectiveness analysis based on the bolt connection condition of the structure and the stress condition of the bolt connection node; S400, performing collapse danger analysis by the corresponding position earthwork collapse anomaly analysis result and the corresponding earthwork area protection effectiveness analysis result; S500, outputting the position reinforcement strategy by the collapse danger analysis result of each position.

2. A method of monitoring the stress in a tie bolt of a structure according to claim 1, wherein The step S100 comprises the following specific contents: Step 110, acquiring the image condition of the corresponding structure bolt at each position by an image acquisition terminal, and simultaneously acquiring the stress condition data of the corresponding bolt connection position by a mechanical sensor, installing a mechanical sensor at the bolt stress part for mechanical monitoring, and analyzing the bolt stress anomaly by the image condition of the bolt and the stress condition; Step 120, acquiring the surface crack condition, earthwork volume condition and soil adhesion condition of the corresponding earthwork by a sensor; Step 130, acquiring the vibration condition of the equipment operation in the construction process by a vibration sensor, including the vibration amplitude and vibration frequency condition of each corresponding position of the earthwork; Step 140, storing the acquired data in the corresponding storage component for subsequent retrieval and use.

3. A method of monitoring the stress in a tie bolt of a structure according to claim 1, wherein The step S200 of corresponding position earthwork collapse anomaly analysis comprises the following specific steps: Step 210, acquiring the surface crack condition, earthwork quality condition and soil adhesion condition of the corresponding earthwork, and performing earthwork damage analysis by the crack condition of the earthwork surface; Step 220, obtaining the earthwork adhesion anomaly by dividing the safe adhesion condition of the earthwork soil by the adhesion condition of the corresponding earthwork soil, obtaining the earthwork safety anomaly by weighted summation of the earthwork damage analysis result and the earthwork adhesion anomaly, obtaining the quality anomaly value by dividing the earthwork quality condition by the corresponding safety protection quality of the structure, and obtaining the earthwork initial anomaly by multiplying the quality anomaly value and the earthwork safety anomaly; Step 230, acquiring the vibration frequency and vibration amplitude data of the corresponding position in the equipment operation process, and multiplying the standardized vibration frequency and vibration amplitude to obtain the corresponding equipment vibration anomaly; Step 240, obtaining the equipment vibration influence by multiplying the corresponding equipment vibration anomaly by the equipment influence coefficient, obtaining the earthwork equipment influence anomaly by multiplying the equipment vibration influence by the earthwork initial anomaly, and obtaining the earthwork collapse anomaly analysis result by adding the earthwork equipment influence anomaly and the earthwork initial anomaly.

4. The method of claim 1, wherein the method further comprises: The protection effectiveness analysis in the step S300 comprises the following specific contents: Step 310, acquiring the image condition of the corresponding structure bolt at each position and the stress condition data of the corresponding bolt connection position acquired by the mechanical sensor; Step 320, obtaining the bolt image abnormality by the change of the image condition of the corresponding structure bolt and the image condition of the starting bolt, wherein the specific way of the bolt image abnormality is: obtaining the bolt image abnormality by the volume of the deformation position of the bolt corresponding to the structure bolt and the image condition of the starting bolt divided by the image volume of the starting bolt; Step 330, obtaining the stress abnormality of the corresponding bolt connection position by the stress condition data of the corresponding bolt connection position divided by the maximum value of the safety stress of the corresponding bolt connection; Step 340, obtaining the protection efficiency abnormality of the bolt by weighted summation of the bolt image abnormality and the stress abnormality of the bolt.

5. A method of monitoring the stress in a tie bolt of a structure according to claim 1, wherein The collapse risk analysis in the step S400 includes the following specific contents: The obtained soil collapse abnormality analysis results of each position and the protection efficiency abnormality of the bolt are standardized and then weighted and summed to obtain the collapse risk analysis results of each position. The collapse risk analysis results of each position are compared with the set collapse risk analysis threshold value, and positions with the collapse risk analysis results greater than or equal to the set collapse risk analysis threshold value are set as collapse risk areas, and positions with the collapse risk analysis results less than the set collapse risk analysis threshold value are set as safe areas.

6. A method of monitoring the stress in a tie bolt of a structure according to claim 1, wherein The output of the reinforcement strategy in the step S500 includes the following specific contents: If the collapse risk analysis result of the collapse risk area is greater than or equal to 1.5 times of the set collapse risk analysis threshold value, the collapse risk area is set as a high-risk area, and one or more of the following reinforcement strategies is selected: grouting is used to reinforce and stabilize loose soil; micro piles or soil nailing walls are added to enhance the slope resistance to sliding; high-strength bolts are replaced; anti-loose washers or double nuts are added to prevent further loosening; If the collapse risk analysis result of the collapse risk area is less than 1.5 times of the set collapse risk analysis threshold value, the collapse risk area is set as a low-risk area, and one or more of the following reinforcement strategies is selected: soil geogrids or sprayed concrete surface layers are laid to prevent surface peeling, and local slope cutting is used to reduce the soil pressure; the bolts are tightened to the designed torque; corrosion-resistant sealant is applied to the deformed bolts to delay corrosion.

7. A method of monitoring the stress in a tie bolt of a structure according to claim 3, wherein The soil damage analysis process is: obtaining the average number, width, length and depth of the cracks of the corresponding unit volume of soil, multiplying the average width, length and depth of the cracks of the corresponding unit volume of soil to obtain the average crack volume on the unit volume of soil, and obtaining the soil damage analysis result by dividing the average crack volume on the unit volume of soil by the safe crack volume.

8. A structure-to-tension-bolt stress monitoring system for implementing a structure-to-tension-bolt stress monitoring method according to any one of claims 1 to 7, characterized by, Specifically, it includes: A data acquisition module acquires the bolt connection condition of the structure and the stress condition of the bolt connection node, and simultaneously acquires the soil condition of the corresponding position and the equipment operation vibration condition; A collapse abnormality analysis module performs collapse abnormality analysis of the soil of the corresponding position based on the soil condition of the corresponding position and the equipment operation vibration condition; A protection efficiency analysis module performs protection efficiency analysis of the corresponding soil area based on the bolt connection condition of the structure and the stress condition of the bolt connection node; The collapse danger analysis module analyzes the collapse danger by corresponding position earthwork collapse anomaly analysis result and corresponding earthwork area protection effectiveness analysis result; The reinforcement strategy output module outputs the position reinforcement strategy by the collapse danger analysis result of each position.

9. An electronic device comprising: A processor and a memory, wherein the memory stores a computer program which can be called by the processor; characterized in that the processor executes a construction bolt stress monitoring method according to any one of claims 1-7 by calling the computer program stored in the memory.

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