Safety detection method for existing side slope and related equipment

Abstract

The invention relates to the technical field of side slope safety, and provides a safety detection method and related equipment for an existing side slope, and the method comprises the steps: obtaining a plurality of side slope parameters of a target side slope; constructing a relational expression between the total strain of the target slope soil and the time, and calculating the total strain of the target slope soil based on all the slope parameters and the relational expression; the current anchor rod prestress of the target slope is calculated according to the total strain of the target slope soil body; the current soil cohesive force and the current internal friction angle of the target slope are obtained through inversion based on slope monitoring data; finally, the safety coefficient of the target slope is calculated according to the current anchor rod prestress, the soil cohesive force and the internal friction angle which are obtained through calculation. According to the method, the reliability of safety detection of the existing side slope can be improved while disturbance to the existing side slope is avoided.

Description

Technical Field

[0001] This application relates to the technical field of slope safety, and particularly relates to a safety detection method and related equipment for existing slopes. Background Art

[0002] An existing slope refers to a slope that already exists or has been built, mainly referring to slopes formed in human engineering activities (such as excavation and slope cutting in projects such as roads, railways, mines, etc.) and artificially treated and supported. Since people began to study the prevention and control of landslide disasters in the mid-19th century, a large number of existing slopes have been left in cities, roads, mines, etc. Over time or due to environmental changes, some of these existing slopes have gradually become potential safety hazards in people's production and life. For example, a landslide occurred on a highway in a certain area, resulting in more than 5 deaths and the complete disconnection of all six lanes in both directions of the highway. The landslide was considered to be caused by the reduction of the anchoring force of slope bolts and the failure of the anchoring system. It can be seen that the safety problem of existing slopes is also crucial for people's lives and property safety.

[0003] There are many difficulties to overcome in the safety appraisal of existing slopes: ① There is no survey data or the data is incomplete; ② The current state of the slope soil body and the degree of deterioration of the support system are unclear; ③ The slope safety analysis method is mainly qualitative evaluation, lacking quantitative analysis. This also leads to a lack of basis when subsequent reinforcement and transformation of existing slopes are carried out, resulting in timidity when designing the plan.

[0004] Regarding the safety appraisal problem of existing slopes, the current solutions mainly rely on the empirical judgment of experts, follow the standardized processes of corresponding specifications, and adopt means such as supplementary survey, appearance inspection, and special inspection of existing structures, and then infer the safety of existing slopes through empirical formulas or expert experience. Obviously, this method has many subjective factors and lacks quantitative analysis means. Supplementary survey not only consumes manpower and material resources but also causes certain disturbances to the slope itself. In addition, for the inspection and appraisal of existing support structures, most of the support structures of slopes are buried deep underground. When inspecting and appraising them, different degrees of damage will often be caused to the slope rock and soil body and the support structure itself. For example, the extraction and pull-out test of bolts not only damages the integrity of the structure but also increases the uncertainty of the test results due to the disturbance of the slope. It can be seen that there are currently problems of low reliability in the safety detection of existing slopes and disturbance to the existing slopes themselves. Summary of the Invention

[0005] This application provides a safety detection method and related equipment for existing slopes, which can solve the problems of low reliability in the safety detection of existing slopes and disturbance to the existing slopes themselves.

[0006] In the first aspect, an embodiment of this application provides a safety detection method for existing slopes, and the safety detection method includes:

[0007] Acquire multiple slope parameters of the target slope; the slope parameters are parameters that affect the safety of the target slope;

[0008] The relational expression between the total strain of the target slope soil and time is constructed, and the total strain of the target slope soil is calculated based on all slope parameters and the relational expression; the relational expression is used to describe the relationship between the total strain of the target slope soil and time under the action of anchor prestress;

[0009] Under the premise of assuming that the soil and the anchors deform synchronously, the current anchor prestress of the target slope is calculated according to the total strain of the soil of the target slope;

[0010] Based on the slope monitoring data, the slope soil strength parameters are inverted to obtain the current soil cohesion and internal friction angle of the target slope;

[0011] The safety factor of the target slope is calculated based on the current anchor prestress, soil cohesion and internal friction angle.

[0012] Optionally, construct a relationship expression between the total strain of the target slope soil and time, including:

[0013] Construct soil consolidation strain expression and creep equation of target slope;

[0014] The soil consolidation strain expression and creep equation are combined to obtain the relationship expression between the total strain of the target slope soil and time.

[0015] Optionally, the soil consolidation strain expression is:

[0016]

[0017] Among them, ε c represents the eccentric consolidation strain of soil, Δσ represents the anchor prestress, E s represents the soil compression modulus, α and R are unknown coefficients, and t represents the time from the completion of the target slope support construction to the present.

[0018] Alternatively, the creep equation is:

[0019]

[0020] Where t0 represents the hysteresis time, E k represents the elastic modulus of soil, ε s represents the creep strain of soil, η k Represents the viscosity coefficient of soil.

[0021] Optionally, the relationship between the total strain of the target slope soil and time is expressed as:

[0022]

[0023] Among them, Δε represents the total strain of the soil mass of the target slope, ε0 represents the initial strain of the anchor rod, A s represents the cross-sectional area of the anchor rod, and A r represents the average soil mass area in the prestress influence region, and E0 represents the initial modulus of the anchor rod.

[0024] Optionally, based on all slope parameters and relationship expressions, the total strain of the soil mass of the target slope is calculated, including:

[0025] Based on all slope parameters, simulate the action of the prestress of the anchor rod in the soil mass under different initial stress conditions, establish the relationship between the undetermined parameters in the expression and the initial prestress of the anchor rod, and obtain the values of multiple undetermined parameters in the relationship expression;

[0026] Substitute the values of all undetermined parameters into the relationship expression between the total strain of the soil mass of the target slope and time to obtain the total strain of the soil mass of the target slope.

[0027] Optionally, on the premise of assuming synchronous deformation of the soil mass and the anchor rod, calculate the prestress of the anchor rod of the target slope according to the total strain of the soil mass of the target slope, including:

[0028] Through the formula:

[0029] F = A s E0(ε0 - Δε)

[0030] Calculate the prestress F of the anchor rod;

[0031] Among them, A s represents the cross-sectional area of the anchor rod, E0 represents the initial modulus of the anchor rod, ε0 represents the initial strain of the anchor rod, and Δε represents the total strain.

[0032] In the second aspect, the embodiments of the present application provide a safety detection device for an existing slope, including:

[0033] An acquisition module, configured to acquire multiple slope parameters of the target slope; the slope parameters are parameters affecting the safety of the target slope;

[0034] A construction module, configured to construct a relationship expression between the total strain of the soil mass of the target slope and time, and calculate the total strain of the soil mass of the target slope based on all slope parameters and the relationship expression; the relationship expression is used to describe the relationship between the total strain of the soil mass of the target slope and time under the action of the prestress of the anchor rod;

[0035] A first calculation module, configured to calculate the current prestress of the anchor rod of the target slope according to the total strain of the soil mass of the target slope on the premise of assuming synchronous deformation of the soil mass and the anchor rod;

[0036] A parameter inversion module is used to invert the slope soil strength parameters based on slope monitoring data to obtain the current soil cohesion and internal friction angle of the target slope.

[0037] A second calculation module is used to calculate the safety factor of the target slope according to the current anchor prestress, soil cohesion and internal friction angle.

[0038] In a third aspect, an embodiment of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned safety detection method for existing slopes is implemented.

[0039] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned safety detection method for existing slopes is implemented.

[0040] The above solution of the present application has the following beneficial effects:

[0041] In the embodiment of the present application, by obtaining multiple slope parameters of the target slope, then constructing a relationship expression between the total strain of the target slope soil and time, and based on all slope parameters and the relationship expression, calculating the total strain of the target slope soil, then calculating the anchor prestress of the target slope according to the total strain of the target slope soil, then inverting the slope strength parameters based on the monitoring data to obtain the soil cohesion and internal friction angle of the target slope, and finally calculating the safety factor of the target slope according to the anchor prestress, soil cohesion and internal friction angle. Among them, calculating the attenuation value of the anchor prestress by calculating the total strain of the target slope soil based on the slope parameters, and inverting the slope soil strength parameters based on the monitoring data, and calculating the safety factor according to the calculated current anchor prestress and strength parameters can effectively improve the accuracy of the safety factor. At the same time, the method of the present application does not need to disturb the slope itself and will not damage the existing support structure, effectively reducing the impact on the target slope during the safety detection process, avoiding changes in the slope parameters of the target slope, and improving the reliability of the safety detection of existing slopes.

[0042] Other beneficial effects of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 The flowchart of the safety detection method for existing slopes provided by an embodiment of the present application;

[0045] Figure 2 The structural schematic diagram of the bolt-soil consolidation creep coupling analysis model provided by an embodiment of the present application;

[0046] Figure 3 The structural schematic diagram of the safety detection device for existing slopes provided by an embodiment of the present application;

[0047] Figure 4 The structural schematic diagram of the terminal device provided by an embodiment of the present application. Detailed implementation manners

[0048] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0049] It should be understood that when used in the specification of the present application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0050] It should also be understood that the term "and / or" as used in the specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0051] As used in the specification of the present application and the appended claims, the term "if" can be interpreted as "when", "once", "in response to determining", or "in response to detecting" according to the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]" according to the context.

[0052] In addition, in the description of the specification of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0053] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that specific features, structures or characteristics described in connection with that embodiment are included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0054] Aiming at the problems of low reliability in the safety detection of existing existing slopes and disturbance to the existing slopes themselves, the embodiments of this application provide a safety detection method for existing slopes. This safety detection method obtains multiple slope parameters of the target slope, then constructs a relationship expression between the total strain of the target slope soil mass and time, and based on all slope parameters and the relationship expression, calculates the total strain of the target slope soil mass. Then, according to the total strain of the target slope soil mass, calculates the prestress of the anchor rods of the target slope, and then inversely calculates the strength parameters of the slope soil mass to obtain the soil cohesion and internal friction angle of the target slope. Finally, according to the prestress of the anchor rods, soil cohesion and internal friction angle, calculates the safety factor of the target slope. Among them, calculating the attenuation value of the prestress of the anchor rods by calculating the total strain of the target slope soil mass based on the slope parameters, inversely calculating the strength parameters of the slope soil mass based on the monitoring data, and calculating the safety factor according to the currently calculated prestress of the anchor rods and strength parameters can effectively improve the accuracy of the safety factor. At the same time, the method of this application does not need to cause disturbance to the slope itself and will not damage the existing support structure, effectively reducing the impact on the target slope during the safety detection process, avoiding changes in the slope parameters of the target slope, and improving the reliability of the safety detection of existing slopes.

[0055] Next, an exemplary description will be given of the safety detection method for existing slopes provided by this application.

[0056] As Figure 1 shown, the safety detection method for existing slopes provided by this application includes the following steps:

[0057] Step 11, obtain multiple slope parameters of the target slope.

[0058] The above slope parameters are parameters that affect the safety of the target slope, such as geotechnical mechanics parameters during the support design and construction of the target slope, the layout of the support structure, the material performance parameters and size specification parameters of the support structure, the magnitude of the prestress applied by the anchor rods (cables), slope deformation monitoring data, etc. The above target slope is an existing slope that needs to be subjected to safety detection.

[0059] In some embodiments of the present application, multiple slope parameters can be obtained by collecting relevant information of the target slope, such as geotechnical investigation data, design documents, as-built drawings, construction data, inspection data, monitoring data, reinforcement and renovation data, quality or accident handling reports, etc.

[0060] Step 12: Construct an expression for the relationship between the total strain of the target slope soil mass and time, and calculate the total strain of the target slope soil mass based on all slope parameters and the relationship expression.

[0061] The above relationship expression is used to describe the relationship between the total strain of the target slope soil mass and time under the action of the prestress of the anchor rod.

[0062] In some embodiments of the present application, the steps of constructing the expression for the relationship between the total strain of the target slope soil mass and time, and calculating the total strain of the target slope soil mass based on all slope parameters and the relationship expression include:

[0063] The first step: Construct the soil consolidation strain expression and creep equation of the target slope.

[0064] Specifically, the soil consolidation strain expression is:

[0065]

[0066] Among them, ε c represents the deviatoric consolidation strain of the soil mass, Δσ represents the prestress of the anchor rod, E s represents the compression modulus of the soil mass, α and β are undetermined coefficients, and t represents the time from the completion of the support construction of the target slope to the present.

[0067] The creep equation is:

[0068]

[0069] Among them, t0 represents the retardation time, E k represents the elastic modulus of the soil mass, ε s represents the creep strain of the soil mass, η k represents the viscosity coefficient of the soil mass.

[0070] The second step: Combine the soil consolidation strain expression and the creep equation to obtain an expression for the relationship between the total strain of the target slope soil mass and time.

[0071] Specifically, the expression for the relationship between the total strain of the target slope soil mass and time is:

[0072]

[0073] Among them, Δε represents the total strain of the target slope soil mass, ε0 represents the initial strain of the anchor rod, A s represents the cross-sectional area of the anchor rod, Ar It represents the average soil area of ​​the prestressing influence area, and E0 represents the initial modulus of the anchor.

[0074] It should be noted that when the soil consolidation strain expression and the creep equation are combined, it is assumed that the soil axial stress is entirely provided by the anchor prestress, that is, it satisfies:

[0075]

[0076] Among them, σ1 represents the stress of the anchor rod at a certain moment, σ1=E0(ε0-Δε), σ0=E0ε0, and σ0 represents the initial stress of the anchor rod when the prestressing is completed.

[0077] The third step is to simulate the effect of anchor prestress in the soil under different initial stress conditions based on all slope parameters, establish the relationship between the unknown parameters in the expression and the initial prestress of the anchor, and obtain the values ​​of multiple unknown parameters in the relationship expression.

[0078] It should be noted that the multiple parameters to be determined in the relational expression are E0, E s 、E k , η k , t0, α, β.

[0079] For example, the soil parameters in the initial stage of engineering construction among all slope parameters can be substituted into the numerical analysis software to simulate the triaxial compression test of soil under different initial prestress of anchor rods, so as to obtain the soil consolidation creep curve, and the relationship between the change of these 7 parameters to be determined and the initial prestress σ0 of anchor rods can be established, and the empirical relationship can be established. Finally, the actual prestress value applied in the project is substituted into the empirical relationship to obtain the value of the parameter to be determined.

[0080] The fourth step is to substitute the values ​​of all parameters to be determined into the relationship expression between the total strain of the target slope soil and time to obtain the total strain of the target slope soil.

[0081] For example, in the analysis process of this step, for soil slopes, after the anchor prestress is applied, the soil will undergo consolidation compression due to the tensile stress of the anchor and creep deformation under the long-term action of stress, causing the soil to undergo axial compression and produce compressive strain. Since the anchor stress directly acts on the soil itself, the axial compression of the soil will cause the anchor to rebound and deform, and the prestress will be reduced.

[0082] It is assumed that the anchor and the soil deform synchronously, and a coupling analysis model of anchor and soil consolidation creep is established. It is assumed that the total axial strain of the soil is the sum of consolidation deformation and creep deformation, and the prestress of the anchor is used as the compressive force acting on both ends of the soil. The creep and consolidation deformation of the soil are simulated by the Kelvin model and the average consolidation theory of soil, respectively, and the anchor is simulated by the Hooke model. The simulation model is as follows: Figure 2As shown, both ends of the anchor rod are respectively connected to the soil consolidation model and the soil creep model. The other end of the soil consolidation model is connected to the soil creep model. The dashed box represents the whole of the soil creep model.

[0083] Step 13: On the premise of assuming that the soil and the anchor rod deform synchronously, calculate the current prestress of the anchor rod for the target slope according to the total strain of the target slope soil.

[0084] Specifically, through the formula:

[0085] F = A s E0(ε0 - Δε)

[0086] Calculate the prestress F of the anchor rod.

[0087] Among them, A s represents the cross-sectional area of the anchor rod, E0 represents the initial modulus of the anchor rod, ε0 represents the prestress in the anchor rod, and Δε represents the total strain.

[0088] Step 14: Invert the strength parameters of the slope soil based on the slope monitoring data to obtain the current soil cohesion and internal friction angle of the target slope.

[0089] Exemplarily, a slope numerical analysis model of the target slope can be established by using the geotechnical numerical simulation analysis software FLAC 3D based on the slope monitoring data (i.e., the values of the parameters related to the safety of the target slope). Among them, the prestressed anchor rod is simulated by using the cable element, which is divided into three parts: the tray, the free section, and the anchorage section, and is distinguished by assigning different bonding parameters. The application of prestress is simulated by the tensile stress acting on the free section of the anchor rod, and the displacement data of the monitoring points of the target slope are simulated and calculated by using the slope numerical analysis model established by the above FLAC 3D. Then, a backpropagation neural network (BP) can be used for parameter inversion analysis. Set the soil cohesion c and the internal friction angle φ as the objects of inversion analysis. Use different value samples of the preset soil parameters (c, φ) and the calculated displacement data of the monitoring points for model training and verification. Finally, input the on-site monitoring displacement data into the trained model to output the soil cohesion and the internal friction angle.

[0090] Among them, if the properties of the slope soil are not uniform, the soil can be analyzed in layers, the slope displacement monitoring points can be increased, and the soil parameters (c, φ) of each layer of soil can be output respectively.

[0091] Step 15: Calculate the safety factor of the target slope according to the current prestress of the anchor rod, the soil cohesion, and the internal friction angle.

[0092] Exemplarily, the FLAC 3D described above can be used to establish a slope numerical analysis model of the target slope, and the bolt prestress, soil cohesion, and internal friction angle are substituted into the slope numerical analysis model to solve for the slope safety factor.

[0093] It should be noted that the larger the value of the safety factor, the higher the safety of the target slope. The time-varying attenuation expression of the bolt prestress obtained above is used to predict the bolt prestress at a future time, and a regression analysis is carried out to obtain the empirical relationship between the deformation value and time of each monitoring point to predict the soil parameters at a future time. The safety factor at a future time can be calculated by predicting the bolt prestress and soil parameters to achieve the safety prediction of the target slope.

[0094] It is worth mentioning that calculating the total strain of the soil body of the target slope based on the slope parameters to calculate the attenuation value of the bolt prestress, and inversely analyzing the strength parameters of the slope soil body based on the monitoring data, and calculating the safety factor according to the currently calculated bolt prestress and strength parameters can effectively improve the accuracy of the safety factor. At the same time, the method of the present application does not cause disturbance to the slope itself and does not damage the existing support structure, effectively reducing the impact on the target slope during the safety detection process, avoiding changes in the slope parameters of the target slope, and improving the reliability of the safety detection of the existing slope.

[0095] In addition, the method of the present application can quantitatively analyze the changes in the mechanical parameters of the slope soil body and some key parameters of the support structure, and perform scientific calculations, avoiding the subjectivity of the prior art and making the identification result more scientific.

[0096] The method of the present application basically does not cause disturbance to the existing slope itself and does not damage the existing support structure, reducing the impact on the slope during the detection and identification process compared with the prior art.

[0097] The method of the present application has less workload and lower cost compared with the prior art.

[0098] The method of the present application can not only quantitatively analyze the current safety of the existing slope, but also predict the future slope safety according to requirements.

[0099] Next, an exemplary description will be given of the safety detection device for an existing slope provided by the present application.

[0100] As Figure 3 shown, an embodiment of the present application provides a safety detection device for an existing slope. The safety detection device 300 for the existing slope includes:

[0101] An acquisition module 301, configured to acquire a plurality of slope parameters of the target slope; the slope parameters are parameters that affect the safety of the target slope;

[0102] A construction module 302 is configured to construct an expression for the relationship between the total strain of the soil mass of the target slope and time, and calculate the total strain of the soil mass of the target slope based on all slope parameters and the relationship expression; the relationship expression is used to describe the relationship between the total strain of the soil mass of the target slope and time under the action of the prestress of the anchor bolt.

[0103] A first calculation module 303 is configured to calculate the current prestress of the anchor bolt of the target slope according to the total strain of the soil mass of the target slope on the premise of assuming synchronous deformation of the soil mass and the anchor bolt.

[0104] A parameter inversion module 304 is configured to invert the strength parameters of the soil mass of the slope based on the slope monitoring data to obtain the current soil cohesion and internal friction angle of the target slope.

[0105] A second calculation module 305 is configured to calculate the safety factor of the target slope according to the current prestress of the anchor bolt, the soil cohesion and the internal friction angle.

[0106] It should be noted that for the information interaction, execution process, etc. between the above-mentioned devices / units, since they are based on the same concept as the method embodiments of the present application, their specific functions and the technical effects brought thereby can be specifically referred to the method embodiment part, and will not be elaborated here.

[0107] Those skilled in the art can clearly understand that for the convenience and conciseness of description, only the above-mentioned division of each functional unit and module is used for example. In actual application, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit exists physically alone, or two or more units are integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated here.

[0108] As Figure 4 shown, an embodiment of the present application provides a terminal device. The terminal device D10 in this embodiment includes: at least one processor D100 ( Figure 4 only one processor is shown in the figure), a memory D101, and a computer program D102 stored in the memory D101 and executable on the at least one processor D100. When the processor D100 executes the computer program D102, the steps in any of the above method embodiments are implemented.

[0109] Specifically, when the processor D100 executes the computer program D102, it obtains multiple slope parameters of the target slope, then constructs an expression of the relationship between the total strain of the target slope soil mass and time, and calculates the total strain of the target slope soil mass based on the slope parameters and the relationship expression. Then, it calculates the prestress of the anchor rods of the target slope according to the total strain of the target slope soil mass, and then inversely calculates the strength parameters of the slope soil mass based on the slope monitoring data to obtain the cohesion and internal friction angle of the soil mass of the target slope. Finally, it calculates the safety factor of the target slope according to the prestress of the anchor rods, the cohesion of the soil mass, and the internal friction angle. Among them, calculating the attenuation value of the prestress of the anchor rods by calculating the total strain of the target slope soil mass based on the slope parameters, inversely calculating the strength parameters of the slope soil mass based on the monitoring data, and calculating the safety factor according to the currently calculated prestress of the anchor rods and the strength parameters can effectively improve the accuracy of the safety factor. At the same time, the method of the present application does not need to disturb the slope itself and will not damage the existing support structure, effectively reducing the impact on the target slope during the safety detection process, avoiding changes in the slope parameters of the target slope, and improving the reliability of the safety detection of the existing slope.

[0110] The so-called processor D100 may be a central processing unit (CPU, Central Processing Unit), and this processor D100 may also be other general-purpose processors, digital signal processors (DSP, Digital Signal Processor), application-specific integrated circuits (ASIC, Application Specific Integrated Circuit), field-programmable gate arrays (FPGA, Field-Programmable Gate Array), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or this processor may also be any conventional processor, etc.

[0111] In some embodiments, the memory D101 may be an internal storage unit of the terminal device D10, such as the hard disk or memory of the terminal device D10. In some other embodiments, the memory D101 may also be an external storage device of the terminal device D10, such as a plug-in hard disk equipped on the terminal device D10, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory D101 may also include both the internal storage unit and the external storage device of the terminal device D10. The memory D101 is used to store an operating system, application programs, a BootLoader, data, and other programs, such as the program code of the computer program. The memory D101 may also be used to temporarily store data that has been output or is to be output.

[0112] An embodiment of the present application also provides a computer-readable storage medium storing a computer program, which when executed by a processor can implement the steps in the above-mentioned method embodiments.

[0113] An embodiment of the present application provides a computer program product, which when running on a terminal device enables the terminal device to implement the steps in the above-mentioned method embodiments.

[0114] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-mentioned method embodiments of the present application, a computer program can be used to instruct relevant hardware to complete. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to the safety detection method device / terminal device of the existing slope, a recording medium, a computer memory, a Read-Only Memory (ROM), a Random Access Memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Such as a USB flash drive, a mobile hard disk, a magnetic disk, or an optical disc, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable medium may not be an electrical carrier signal and a telecommunication signal.

[0115] In the above embodiments, the descriptions of the various embodiments each have their own focuses. For parts not detailed or recorded in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0116] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0117] The above is the preferred implementation mode of this application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle described in this application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this application.

Claims

1. A safety detection method for an existing slope, characterized in that: include: Obtain multiple slope parameters of the target slope; The slope parameters are parameters that affect the safety of the target slope; Constructing a relational expression between the total strain of the target slope soil and time, and calculating the total strain of the target slope soil based on all slope parameters and the relational expression; the relational expression is used to describe the relationship between the total strain of the target slope soil and time under the action of anchor prestress; Under the premise of assuming that the soil and the anchors deform synchronously, the current anchor prestress of the target slope is calculated according to the total strain of the soil of the target slope; Invert the slope soil strength parameters based on the slope monitoring data to obtain the current soil cohesion and internal friction angle of the target slope; The safety factor of the target slope is calculated according to the current anchor rod prestress, the soil cohesion and the internal friction angle.

2. The safety detection method according to claim 1, characterized in that: The relationship expression between the total strain of the target slope soil and time is constructed, including: Constructing soil consolidation strain expression and creep equation of the target slope; The soil consolidation strain expression and the creep equation are combined to obtain the relationship expression between the total strain of the target slope soil and time.

3. The safety detection method according to claim 2, characterized in that: The soil consolidation strain expression is: Among them, ε c represents the eccentric consolidation strain of soil, Δσ represents the anchor prestress, E s represents the soil compression modulus, α and β are unknown parameters, and t represents the time from the completion of the target slope support construction to the present.

4. The safety detection method according to claim 3, characterized in that: The creep equation is: Where t0 represents the hysteresis time, E k represents the elastic modulus of soil, ε s represents the creep strain of soil, η k Represents the viscosity coefficient of soil.

5. The safety detection method according to claim 4, characterized in that: The relationship between the total strain of the target slope soil and time is expressed as: Among them, Δε represents the total strain of the target slope soil, ε0 represents the initial strain of the anchor, and A s Represents the cross-sectional area of ​​the anchor rod, A r It represents the average soil area of ​​the prestressing influence area, and E0 represents the initial modulus of the anchor.

6. The safety detection method according to claim 1, characterized in that: The step of calculating the total soil strain of the target slope based on all slope parameters and the relational expression includes: Based on all slope parameters, the effect of anchor prestress in soil under different initial stress conditions is simulated, the relationship between the undetermined parameters in the expression and the initial prestress of the anchor is established, and the values ​​of multiple undetermined parameters in the relationship expression are obtained; Substitute the values ​​of all parameters to be determined into the relationship expression between the total strain of the target slope soil and time to obtain the total strain of the target slope soil.

7. The safety detection method according to claim 1, characterized in that: The method of calculating the current anchor prestress of the target slope according to the total strain of the target slope soil body under the premise of assuming that the soil body and the anchor rod deform synchronously includes: By formula: F=A s E0(ε0-De) Calculate anchor bolt prestress F; Among them, A s represents the cross-sectional area of ​​the anchor rod, E0 represents the initial modulus of the anchor rod, ε0 represents the initial strain of the anchor rod, and Δε represents the total strain.

8. A safety detection device for an existing slope, characterized in that: include: An acquisition module, used for acquiring multiple slope parameters of a target slope; The slope parameters are parameters that affect the safety of the target slope; A construction module is used to construct a relational expression between the total strain of the target slope soil and time, and calculate the total strain of the target slope soil based on all slope parameters and the relational expression; the relational expression is used to describe the relationship between the total strain of the target slope soil and time under the action of anchor prestress; The first calculation module is used to calculate the current anchor prestress of the target slope according to the total strain of the target slope soil under the premise of assuming that the soil and the anchor deform synchronously; A parameter inversion module is used to invert the slope soil strength parameters based on the slope monitoring data to obtain the current soil cohesion and internal friction angle of the target slope; The second calculation module is used to calculate the safety factor of the target slope according to the current anchor rod prestress, the soil cohesion and the internal friction angle.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the safety detection method for an existing slope as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the safety detection method for an existing slope as claimed in any one of claims 1 to 7 is implemented.

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