A method for deriving potential slip surface inside slope based on distributed optical fiber

Abstract

The application discloses a kind of based on distributed optical fiber's slope internal potential sliding surface derivation method, including in the same profile of slope different elevation along different direction and drill monitoring hole;Auxiliary structure and distributed strain fiber are arranged in monitoring hole and grouting backfilling;The strain of fiber along the direction of drilling is continuously measured, and the relative displacement of slope to hole bottom at each depth in monitoring hole is calculated based on cantilever beam model;The curve of relative displacement with hole depth is drawn, and the displacement space variation rate-hole depth curve is calculated, and the position corresponding to the peak point of the curve is the potential sliding position in monitoring hole;The potential sliding position in different monitoring hole is connected to obtain the potential sliding surface of slope in the profile.According to the method disclosed by the application, the spatial form of the sliding surface does not need to be assumed in advance, and the potential sliding surface inside the slope can be effectively and accurately positioned in combination with the actual slope displacement development trend.The application has the advantages of simple installation operation, automatic temperature compensation, high spatial resolution and the like.

Description

Technical Field

[0001] This invention relates to a method for deriving potential slip surfaces inside slopes based on distributed optical fibers, belonging to the field of geotechnical engineering safety monitoring technology. Background Technology

[0002] The core of slope stability analysis is determining the location and morphology of potential slip surfaces within the slope, which is the key basis for slope stability calculation and evaluation. Currently, the main methods for determining potential slip surfaces in engineering practice include empirical analysis, theoretical calculation, numerical simulation, and field monitoring, but each method has its limitations.

[0003] Empirical analysis methods primarily rely on geological information such as strata, weak interlayers, and structural planes to directly determine the location of potential slip surfaces, which is highly subjective and lacks quantitative calculation. Theoretical analysis methods, such as the classic limit equilibrium method (Swedish slice method, Bishop method, etc.) and modern optimization search methods based on it, fundamentally assume the shape of the slip surface (such as circular arc, logarithmic spiral, or polygonal line) before iteratively calculating to find the slip surface with the minimum safety factor. This method is essentially an indirect inversion calculation based on an empirical model, and its accuracy is difficult to guarantee for slopes with complex geological conditions and varied slip surface morphologies. Numerical simulation methods, such as the finite element strength reduction method, can automatically identify complex slip surfaces that best conform to mechanical failure mechanisms, but the calculation results are highly dependent on the model parameters input by the software and the constitutive relations of the material. The derived slip surface cannot accurately reflect the potential slip surface of the slope under actual working conditions. Field monitoring is a crucial means of obtaining accurate information on slope deformation. However, traditional monitoring methods (such as borehole inclinometers and fixed strain gauges) are point-based or quasi-distributed monitoring, capable of acquiring displacement or strain information at only a few discrete points within the slope. This results in low spatial resolution and numerous blind spots. When the slip surface does not pass precisely through the designated monitoring points, its location cannot be determined, making it difficult to comprehensively and continuously characterize the spatial morphology of the slip surface.

[0004] Distributed fiber optic sensing technology has been introduced into slope safety monitoring due to its advantages such as distributed operation, long-distance transmission, resistance to electromagnetic interference, and simple installation. Distributed fiber optic cables are bonded to the surface of an auxiliary structure and placed inside the slope. When the slope deforms, the auxiliary structure deforms synchronously. The deformation along the length of the auxiliary structure causes the fiber bonded to the surface to be stretched or compressed. Using distributed fiber optic measurement technology to obtain the tensile or compressive strain of the fiber on the auxiliary structure surface, combined with mechanical theory, the deformation inside the slope along the length of the auxiliary structure can be calculated. However, how to quantitatively derive the physical quantities characterizing the location of the slip surface from these continuous deformation data remains a technical challenge.

[0005] Therefore, the existing technology lacks a reliable method that can directly, continuously, and with high precision deduce the spatial location and morphology of potential slip surfaces from internal slope deformation measurement data. This deficiency seriously restricts the accuracy of slope stability assessment and the effectiveness of disaster prevention. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method for deriving potential slip surfaces inside slopes based on distributed optical fibers. This method is simple to operate and low in cost, and can effectively and accurately locate potential slip surfaces of slopes by tracking the development trend of internal deformation in real time.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A method for deriving potential slip surfaces inside slopes based on distributed optical fibers includes the following steps: Step 1: Select a profile of the slope as the monitoring profile, and uniformly set several borehole elevations within the overall height range of the slope. Drill monitoring holes in different directions at each borehole elevation. Step 2: For each monitoring hole, use several sections of PPR pipe to splice together an auxiliary structure. After attaching the distributed optical fiber to the surface of the auxiliary structure, place the entire auxiliary structure into the monitoring hole. Pour cement mortar between the auxiliary structure and the inner wall of the monitoring hole and backfill to the monitoring hole opening. Step 3: Measure the strain fiber data of the auxiliary structure that deforms synchronously with the slope along the drilling direction, discretize the auxiliary structure into several cantilever beam models under uniformly distributed loads, and obtain the relative displacement of the slope with respect to the bottom of the monitoring hole at each depth by combining the cantilever beam deflection calculation method. Step 4: Plot the curve of relative displacement in the monitoring hole as a function of hole depth, calculate the spatial rate of change of relative displacement along the drilling direction at different depths, establish the relationship between the spatial rate of change of relative displacement and hole depth, and determine the position corresponding to the peak point of the relative displacement spatial rate of change - hole depth curve as the potential sliding position in the monitoring hole. Step 5: Within the same depth range, connect the potential sliding positions in each monitoring hole obtained in Step 4 in sequence to obtain the potential slip surface inside the monitoring profile slope selected in Step 1.

[0008] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects: 1. This invention utilizes distributed optical fiber sensing technology to continuously and synchronously measure strain field data along the borehole direction, enabling continuous planar monitoring of slope internal deformation and significantly improving the comprehensiveness of monitoring results.

[0009] 2. This invention directly senses and calculates the relative displacement field inside the slope through distributed optical fiber without prior assumptions about the slip surface. The potential slip surface is obtained by connecting the positions of the peak points of the displacement spatial change rate objectively existing in the measured data. This avoids the dependence on engineering experience and simplified models in existing slip surface derivation methods and improves the engineering reliability of the potential slip surface derivation results.

[0010] 3. The method proposed in this invention can continuously monitor the development of internal slope deformation over time, track the spatial development trend of internal slope deformation in real time, and more accurately locate the potential slip surface of the slope. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the derivation of potential slip surfaces on slopes based on distributed optical fiber data within monitoring holes, as presented in this invention. Figure 2 This is a diagram showing the arrangement of monitoring holes in a typical monitoring profile as described in the embodiment. Figure 3 This is a schematic diagram of the splicing and arrangement of auxiliary structures in the embodiment; Figure 4 These are curves showing the relative displacement within hole ZK1 as a function of hole depth at different time periods in the embodiment. Figure 5 These are curves showing the relative displacement within the ZK2 hole as a function of hole depth at different time periods in the embodiment. Figure 6 These are curves showing the relative displacement within the ZK3 hole as a function of hole depth at different time periods in the embodiment. Figure 7 These are curves showing the variation of the relative displacement spatial change rate within hole ZK1 with hole depth at different time periods in the embodiment. Figure 8 These are curves showing the variation of the relative displacement spatial change rate within the ZK2 hole with hole depth at different time periods in the embodiment. Figure 9 These are curves showing the variation of the relative displacement spatial change rate within the ZK3 hole with hole depth at different time periods in the embodiment. Figure 10 This is a typical monitoring profile of potential slip surface derived in the embodiments. Detailed Implementation

[0012] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0013] To address the challenges of subjective and theoretically unfounded methods in determining potential slope slip surfaces, the computational complexity and inability to account for material deformation characteristics in the limit equilibrium method, and the significant influence of software-defined material constitutive models and parameters on the derived potential slope slip surfaces, this invention provides a method for deriving potential slope slip surfaces based on distributed optical fibers, comprising the following steps: 1) Select a certain monitoring profile of the slope and drill monitoring holes in different directions at 3 to 5 borehole elevations on the slope; like Figure 1 As shown, select a typical monitoring profile of the slope, and uniformly set 3 to 5 borehole elevations within the overall height range of the slope. Drill monitoring holes at different drilling angles. The diameter of the monitoring hole should be at least twice the outer diameter of the auxiliary structure, and the depth of the monitoring hole should be greater than the estimated potential slip surface depth of the slope.

[0014] 2) The distributed optical fiber was bonded to the surface of the auxiliary structure using an adhesive. The PPR pipes were spliced ​​in an internal connection manner and placed at the bottom of the monitoring hole section by section. Then, cement mortar was poured to backfill the monitoring hole opening. Two symmetrical grooves are cut on the outer surface of the first PPR tube, with the groove width and depth slightly larger than the diameter of the distributed optical fiber. The midpoint of the entire optical fiber is fixed to the bottom of the tube, and the optical fiber is symmetrically bonded to the grooves of the auxiliary structure with adhesive, making the optical fiber and the auxiliary structure a whole and forming an optical fiber measurement loop, ensuring that the deformation of the optical fiber and the auxiliary structure is coordinated. The first auxiliary structure is lowered to the monitoring hole opening along the drilling direction, so that the groove of the auxiliary structure is parallel to the cross-sectional direction. The second auxiliary structure is grooved in the same way and spliced ​​with the first auxiliary structure using an internal connection method, ensuring that the groove direction is consistent. The optical fiber is then bonded to the groove of the second auxiliary structure along the groove direction with adhesive. The auxiliary structures are spliced ​​and the distributed optical fiber is bonded in sequence until the entire auxiliary structure is placed at the bottom of the monitoring hole. Cement mortar is poured into the gap between the auxiliary structure and the inner wall of the borehole and backfilled to the monitoring hole opening.

[0015] 3) After splicing fiber optic pigtails, connect them to the fiber optic demodulator. Use distributed fiber optic sensing technology to measure the strain data of the auxiliary structure, which deforms synchronously with the slope, along the drilling direction. Using the bottom of the auxiliary structure as a fixed point, discretize the auxiliary structure into several cantilever beam models under uniformly distributed loads according to the spatial resolution length of the fiber optic demodulator. Based on the strain fiber optic data in the two grooves on the outer surface of the auxiliary structure, the first... Bending moment at the front end (fixed end) of the cantilever beam It can be represented as: (1) in, , , These are the moments of inertia (about the neutral axis z), elastic modulus, and outer diameters of the auxiliary structures corresponding to each segment of the cantilever beam. , The monitoring holes are respectively the first Depth corresponding to the end of the segmental cantilever beam Strain fiber optic data measured on the upper and lower surfaces of the auxiliary structure; No. Deflection value at the end of the cantilever beam The calculation is as follows: (2) in, The spatial resolution length of the fiber optic demodulator; The rotation angle at the end of this cantilever beam segment The calculation is as follows: (3) The relative displacement of the slope at different depths within the monitoring borehole relative to the bottom of the monitoring borehole can be expressed as: (4)

[0016] 4) Plot the curve of relative displacement in the monitoring hole as a function of hole depth, calculate the spatial variation rate of relative displacement along the drilling direction at different depths, establish the relationship between the spatial variation rate of displacement and hole depth, and determine the position corresponding to the peak point of the spatial variation rate of displacement-hole depth curve as the potential sliding position in the monitoring hole. Based on the relative displacement values ​​of the slope at various depths within the monitoring borehole, the spatial rate of change of the relative displacement along the borehole direction is calculated: (5) In Origin software, the curve of the relative displacement spatial change rate as a function of hole depth is plotted. Peak analysis method is used to find the peak point of the curve, and the position corresponding to the peak point of the curve is determined as the potential sliding position in the monitoring hole.

[0017] 5) Within the same depth range, connect the potential sliding positions in each monitoring hole in 4) in sequence, that is, the positions corresponding to the peak points of the curves, so as to obtain the potential slip surface inside the slope of the monitoring profile.

[0018] The following section uses specific engineering examples to further illustrate the method of deriving potential slip surfaces inside slopes based on distributed optical fiber monitoring data.

[0019] Select a typical monitoring profile of the slope and drill three monitoring holes at different angles along the slope height direction, such as... Figure 2As shown. Two symmetrical grooves are made on the outer surface of the auxiliary structure. The midpoint of the optical fiber is fixed to the bottom of the first PPR tube section, and the optical fiber is bonded to the grooves of the auxiliary structure using adhesive. While ensuring the grooves are aligned, the PPR tubes are spliced ​​together using an internal connection method to extend their length. Simultaneously, the optical fiber is bonded to the grooves along the groove direction, making the optical fiber and the auxiliary structure a unified whole and forming an optical fiber measurement circuit, ensuring coordinated deformation between the optical fiber and the auxiliary structure. After the adhesive solidifies, the PPR tubes are lowered section by section to the bottom of the monitoring hole, with the grooves parallel to the cross-sectional direction. Figure 3 The diagram shows the splicing and arrangement of the auxiliary structures at the bottom and opening of the monitoring borehole, using ZK2 as an example. To ensure that the deformation of the optical fiber and auxiliary structure is consistent with that of the slope, cement mortar is prepared and poured into the gap between the auxiliary structure and the inner wall of the borehole up to the monitoring borehole opening. A wellhead protection platform is then poured at the borehole opening to protect and fix the distributed optical fiber.

[0020] After splicing strain sensing fibers into pigtails, the fibers were connected to a fiber optic demodulator. Distributed fiber optic sensing technology was used to measure strain data along the borehole direction of the auxiliary structure that deformed synchronously with the slope. Multiple sets of strain data were acquired at different time intervals within the monitoring borehole at 4-day sampling intervals. Combined with the cantilever beam deflection calculation method, the relative displacement of the slope with respect to the bottom of the borehole at each depth was obtained, and the relationship between the spatial rate of change of relative displacement along the borehole direction and the borehole depth was established. By comprehensively analyzing the variation law of the spatial rate of change of displacement with the borehole depth at different times, the peak point of the curve was determined as the potential sliding position within the monitoring borehole. The potential sliding positions of each monitoring borehole within the same depth range were connected sequentially to obtain the potential slip surface inside the slope of the monitoring profile.

[0021] The slope monitored in this embodiment is a rock slope. Using the strain fiber measurement value on Day 0 as the initial value, the strain values ​​at different times (Day 1, Day 5, Day 9…) are measured and the strain difference between the initial value and the measured value is calculated. The strain difference values ​​of the upper and lower surfaces of the auxiliary structure are substituted into formulas (2) to (4) to calculate the relative displacement curves of the slope relative to the bottom of the monitoring hole at different depths as a function of depth. Figure 4 , Figure 5 and Figure 6 As shown.

[0022] Calculate the spatial variation rate of relative displacement along the borehole direction at different depths according to formula (5), and plot the curves of the spatial variation rate of relative displacement with borehole depth at different times (Day 1, Day 5, Day 9...) in Origin software, as shown below. Figure 7 , Figure 8 and Figure 9 As shown.

[0023] The peak analysis tool in Origin software was used, employing the Modpoly method to remove potential overall trends in the data. An SG filter was enabled with an appropriate window width (e.g., 5-15 points) to suppress high-frequency random noise and preserve the original shape and peak characteristics of the signal. The entire data sequence was scanned to find points that met the following conditions: (6)

[0024] Apply a quadratic polynomial to the local data points centered at that point. Fitting, determining the precise coordinates of the peak points, i.e. Determined for the entire data sequence Using the peak analysis tool in Origin software, the coordinates of the peak point of the displacement space change rate within the monitoring borehole were obtained again through formula (6) and local data fitting. ,right The data set used the peak analysis tool in Origin software to obtain the coordinates of the peak points. …Repeat the above steps until the depth corresponding to the peak point of the displacement space change rate within the monitoring hole is determined. Take the average value of the peak point depths of the displacement space change rate determined by Origin software at different times (Day 1, Day 5, Day 9…) to obtain the potential sliding position within the monitoring hole.

[0025] Connecting the potential sliding locations of each monitoring hole within the same depth range yields the potential slip surface of the slope in that monitoring profile, such as... Figure 10 As shown in the diagram, since only three monitoring holes were arranged on the monitoring profile in this implementation case, the slip surface inside the slope outside the monitoring hole range could not be accurately obtained from the fiber optic strain data inside the monitoring holes. Therefore, the potential slip surface of this profile was obtained by smoothly connecting the potential slip positions of the three monitoring holes with a circular arc. The slip surface position passes exactly through the core fracture position determined when drilling the monitoring holes (the yellow area inside the monitoring holes), indicating that the method of deriving the potential slip surface inside the slope based on distributed fiber optic monitoring data is reasonable. Moreover, this method determines the slip surface by directly sensing the actual displacement occurring inside the slope, which has higher engineering practicality compared to other methods.

[0026] Based on the same inventive concept, this application provides a computer 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, it implements the steps of the aforementioned method for deriving potential slip surfaces inside slopes based on distributed optical fibers.

[0027] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the aforementioned method for deriving potential slip surfaces inside slopes based on distributed optical fibers.

[0028] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0029] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0030] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0031] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0032] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A method for deriving potential slip surfaces inside slopes based on distributed optical fibers, characterized in that, Includes the following steps: Step 1: Select a profile of the slope as the monitoring profile, and uniformly set several borehole elevations within the overall height range of the slope. Drill monitoring holes in different directions at each borehole elevation. Step 2: For each monitoring hole, use several sections of PPR pipe to splice together an auxiliary structure. After attaching the distributed optical fiber to the surface of the auxiliary structure, place the entire auxiliary structure into the monitoring hole. Pour cement mortar between the auxiliary structure and the inner wall of the monitoring hole and backfill to the monitoring hole opening. Step 3: Measure the strain fiber data of the auxiliary structure that deforms synchronously with the slope along the drilling direction, discretize the auxiliary structure into several cantilever beam models under uniformly distributed loads, and obtain the relative displacement of the slope with respect to the bottom of the monitoring hole at each depth by combining the cantilever beam deflection calculation method. In step 3, after splicing the pigtail of the entire distributed optical fiber, it is connected to the optical fiber demodulator. Distributed optical fiber sensing technology is used to measure the strain optical fiber data of the auxiliary structure that deforms synchronously with the slope along the drilling direction. Taking the part of the auxiliary structure near the bottom of the monitoring hole as a fixed point, the auxiliary structure is discretized into several cantilever beam models under uniformly distributed loads according to the spatial resolution length of the optical fiber demodulator. Based on the strain optical fiber data along the drilling direction, the first... Bending moment at the front end of the cantilever beam Represented as: ， in, , , These are the moment of inertia, elastic modulus, and outer diameter of the auxiliary structures corresponding to each segment of the cantilever beam. , The monitoring holes are respectively the first Depth corresponding to the end of the segmental cantilever beam Strain fiber optic data measured on the upper and lower surfaces of the auxiliary structure, No. The front end of the cantilever beam, that is, the end closest to the bottom of the monitoring hole, is the first... The end of the cantilever beam is the end closest to the monitoring orifice. No. Deflection value at the end of the cantilever beam The calculation is as follows: ， in, The spatial resolution length of the fiber optic demodulator; No. Rotation angle at the end of the cantilever beam The calculation is as follows: ， Then the monitoring hole is in the first Depth of the end of the cantilever beam Relative displacement of the slope relative to the bottom of the monitoring hole By superimposing the first to the last Deflection value at the end of the cantilever beam and angle value The result is represented as: ； Step 4: Plot the curve of relative displacement in the monitoring hole as a function of hole depth, calculate the spatial rate of change of relative displacement along the drilling direction at different depths, establish the relationship between the spatial rate of change of relative displacement and hole depth, and determine the position corresponding to the peak point of the relative displacement spatial rate of change - hole depth curve as the potential sliding position in the monitoring hole. Step 5: Within the same depth range, connect the potential sliding positions in each monitoring hole obtained in Step 4 in sequence to obtain the potential slip surface inside the monitoring profile slope selected in Step 1.

2. The method for deriving potential slip surfaces inside slopes based on distributed optical fibers according to claim 1, characterized in that, In step 1, a vertical profile of the slope is selected as the monitoring profile. 3-5 borehole elevations are evenly set within the overall height range of the slope. Monitoring holes are drilled on the monitoring profile for each borehole elevation. The drilling angle of the monitoring holes corresponding to each borehole elevation is different. The depth of each monitoring hole is greater than the potential slip surface depth of the slope inferred based on the geological data from previous exploration.

3. The method for deriving potential slip surfaces inside slopes based on distributed optical fibers according to claim 1, characterized in that, In step 2, the length of the auxiliary structure is equal to the depth of the monitoring hole, and the auxiliary structure is spliced ​​together from several sections of PPR tubes. Two symmetrical grooves are opened on the outer surface of the first section of PPR tube. The width and depth of the grooves are both greater than the diameter of the distributed optical fiber. The midpoint of the entire distributed optical fiber is fixed to the bottom of the first section of PPR tube, and the distributed optical fiber is symmetrically glued to the grooves of the first section of PPR tube with adhesive. The first section of PPR tube with glued distributed optical fiber is lowered to the monitoring hole opening along the drilling direction, so that the plane formed by the two grooves is parallel to the cross-section of the monitoring hole along the drilling direction. The second PPR tube is grooved using the same method and spliced ​​with the first PPR tube using an internal connection method, ensuring the groove direction is consistent. Adhesive is used to continue bonding the distributed optical fiber to the groove of the second PPR tube along the groove direction. All PPR tubes are spliced ​​in sequence and the distributed optical fiber is bonded until the auxiliary structure is placed into the monitoring hole as a whole, so that the distributed optical fiber and the auxiliary structure become a whole and form an optical fiber measurement circuit. Cement mortar is poured into the gap between the auxiliary structure and the inner wall of the monitoring hole and backfilled to the monitoring hole opening. The diameter of the monitoring hole is at least twice the outer diameter of the auxiliary structure.

4. The method for deriving potential slip surfaces inside slopes based on distributed optical fibers according to claim 1, characterized in that, In step 4, based on the relative displacement of the slope at different depths within the monitoring borehole relative to the bottom of the monitoring borehole, the spatial rate of change of the relative displacement along the drilling direction is calculated: ， in, , The first and Depth of the end of the cantilever beam The relative displacement of the slope relative to the bottom of the monitoring hole; In Origin software, the curve of the relative displacement spatial change rate as a function of hole depth is plotted. Peak analysis method is used to find the peak point of the curve, and the position corresponding to the peak point is determined as the potential sliding position in the monitoring hole.

5. The method for deriving potential slip surfaces inside slopes based on distributed optical fibers according to claim 4, characterized in that, In step 5, the positions corresponding to the peak points in each monitoring hole obtained in step 4 are connected sequentially within the same depth range to obtain the potential slip surface inside the monitoring profile slope selected in step 1.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for deriving potential slip surfaces inside slopes based on distributed optical fibers as described in any one of claims 1 to 5.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for deriving potential slip surfaces inside slopes based on distributed optical fibers as described in any one of claims 1 to 5.

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