A method, system, device, and storage medium for assessing the stability of slope groups.

Abstract

This invention relates to the field of slope stability evaluation technology, specifically a method, system, device, and storage medium for assessing the stability of a slope group. First, based on slope gradient, height, and the degree of geological structure dispersion, the stability of slopes within a slope group is initially classified. Initial stability evaluation data for each slope is obtained, and the slopes are categorized to obtain their stability attributes. Next, considering the impact of unstable slopes on the stability of surrounding slopes, the forced instability value and comprehensive stability value of slopes with different stability attributes are obtained. The slope group stability index, slope group risk entropy value, and failure potential index are calculated. These are then mapped onto a three-dimensional risk assessment table for the slope group, resulting in a more comprehensive and accurate slope group risk level. When applied to the field of slope group risk assessment, this method can improve the accuracy of slope group stability prediction.

Description

Technical Field

[0001] This invention relates to the field of slope stability evaluation technology, specifically to a method, system, equipment, and storage medium for assessing the stability of a group of slopes. Background Technology

[0002] In engineering construction such as transportation, water conservancy, and mining, the stability of slope groups directly affects the safety and durability of the project. By assessing the stability of slope groups, we can provide a basis for engineering design, rationally determine the slope gradient and support methods, and ensure the safety of the project during construction and operation, avoiding project delays or scrapping due to slope instability. In addition, assessing the stability of slope groups can identify potential dangers in advance, take preventive measures, and protect people's lives and property.

[0003] Currently, the amount of monitoring data for slope groups is enormous. Data processing and analysis require professional knowledge and skills. How to accurately extract useful information from massive amounts of data and establish reasonable models and methods for analysis and prediction is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, device, and storage medium for assessing the stability of slope groups.

[0005] The technical solution of this invention is as follows:

[0006] A method for assessing the stability of a slope group includes the following steps:

[0007] S1. Based on slope, height, and the degree of dispersion of geological structure, obtain the initial stability evaluation data of each slope within the area to be evaluated; based on the mapping relationship between the initial stability evaluation data and the slope stability evaluation standard, classify each slope and obtain the stability attributes of each slope.

[0008] S2. For slopes with stable properties being stable, unstable slopes within the neighborhood whose predicted sliding directions of landslides are towards the stable slopes are regarded as the influencing slopes of the corresponding stable slopes; based on the number of influencing slopes, obtain the forced instability value of the stable slopes; for slopes with stable properties being generally stable, based on the geological data of the corresponding slopes, obtain the safety factor of the generally stable slopes as the initial stability value of the generally stable slopes; based on the number, distance, and predicted sliding area of unstable slopes within the neighborhood whose predicted sliding directions of landslides are towards the generally stable slopes, obtain the forced instability value of the generally stable slopes; based on the initial stability value and the forced instability value, obtain the comprehensive stability value of the generally stable slopes; for slopes with stable properties being unstable, obtain the safety factor of the unstable slopes as the initial stability value of the unstable slopes; obtain the forced instability value of the unstable slopes, and based on the initial stability value and the forced instability value, obtain the comprehensive stability value of the unstable slopes;

[0009] S3. According to the number and forced instability values of all stable slopes, the number and comprehensive stability values of all generally stable slopes, and the number and comprehensive stability values of all unstable slopes within the area to be evaluated, obtain the slope group stability index, the slope group risk entropy value, and the failure potential index; map the slope group stability index, the slope group risk entropy value, and the failure potential index to the three-dimensional slope group risk assessment table, and take the highest-rated slope risk mapping level as the risk level of the slope group.

[0010] The specific method for obtaining the initial stability evaluation data of the slopes in S1 is as follows: Substitute the slope gradient, height, and degree of geological structure dispersion of the slopes into their respective stability classification evaluation piecewise functions to obtain several slope gradient evaluation stability values, height evaluation stability values, and degree of geological structure dispersion evaluation stability values; based on the several slope gradient evaluation stability values, height evaluation stability values, and degree of geological structure dispersion evaluation stability values, construct a stability classification matrix; multiply the weight matrix formed by the slope gradient weight, height weight, and degree of geological structure dispersion weight of the slope by the stability classification matrix to obtain the slope stability classification evaluation matrix; take the slope stability classification evaluation matrix as the initial stability evaluation data.

[0011] The stability classification evaluation piecewise function of the slope gradient or height is as follows:

[0012] When x ≤ X1, θ x,1 = 1, θ x,2 = 0, θ x,3 = 0;

[0013] When X1 < x < X2,

[0014] When x ≥ X2, θ x,1 = 0, θx,2 =0, θ x,3 =1;

[0015] x represents the slope or height, X1 is the first threshold for slope or height, X2 is the second threshold for slope or height, and the second threshold is greater than the first threshold. θ x,1 θ is the stability value for the first-order slope assessment, representing the slope or height. x,2 θ is the stability value for the second-order slope assessment of slope or height. x,3 The stability value is assessed for the three-level slope, either in terms of gradient or height.

[0016] The specific standard for slope stability assessment is as follows: the stability attribute corresponding to the maximum value of the data in the slope stability classification assessment matrix is ​​taken as the stability attribute of the slope.

[0017] The forced instability value of a generally stable slope is obtained by the following formula:

[0018]

[0019] P2 is the forced instability value of a generally stable slope, N is the total number of affected slopes of the generally stable slope, k is the area influence coefficient, and A n Let g(d) be the predicted sliding area of ​​the nth influencing slope. n ) represents the distance attenuation value of the nth slope influencing factor, α is the distance influence coefficient, and d n denoted as the distance between the nth influencing slope and the generally stable slope.

[0020] The S3 slope group failure potential index is obtained based on the number of generally stable and unstable slopes and the comprehensive stability value.

[0021] The degree of dispersion of geological structures in S1 is obtained based on the number of geological structures per unit area and the spacing between geological structures within the region of interest of the slope.

[0022] A slope group stability assessment system, used to implement the above-mentioned slope group stability assessment method, includes:

[0023] The slope stability attribute generation module is used to obtain initial stability evaluation data for each slope within the area to be evaluated based on slope, height, and the degree of dispersion of geological structure; based on the mapping relationship between the initial stability evaluation data and the slope stability evaluation standard, each slope is classified to obtain the stability attributes of each slope.

[0024] The slope forced instability value and comprehensive stability value generation module is used as follows: For slopes with a stability attribute of stable type, it identifies unstable slopes within the neighborhood whose predicted landslide direction is towards the stable slope as the affected slopes of the corresponding stable slope; based on the number of affected slopes, it obtains the forced instability value of the stable slope; For slopes with a stability attribute of generally stable type, it obtains the safety factor of the generally stable slope based on the corresponding slope geological data, as the initial stability value of the generally stable slope; Based on the number, distance, and predicted sliding area of ​​unstable slopes within the neighborhood whose predicted landslide direction is towards the generally stable slope, it obtains the forced instability value of the generally stable slope; Based on the initial stability value and the forced instability value, it obtains the comprehensive stability value of the generally stable slope; For slopes with a stability attribute of unstable type, it obtains the safety factor of the unstable slope as the initial stability value of the unstable slope; It obtains the forced instability value of the unstable slope, and Based on the initial stability value and the forced instability value, it obtains the comprehensive stability value of the unstable slope;

[0025] The slope group risk level generation module is used to obtain the slope group stability index, slope group risk entropy value, and failure potential index based on the number and forced instability value of all stable slopes, the number and comprehensive stability value of all generally stable slopes, and the number and comprehensive stability value of all unstable slopes within the area to be assessed. The slope group stability index, slope group risk entropy value, and failure potential index are mapped to the slope group risk three-dimensional assessment table, and the highest-level slope risk is mapped as the risk level of the slope group.

[0026] A slope group stability assessment device includes a processor and a memory, wherein the processor executes a computer program stored in the memory to implement the aforementioned slope group stability assessment method.

[0027] A computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the aforementioned method for assessing the stability of a slope group.

[0028] The beneficial effects of this invention are as follows:

[0029] This invention provides a method for assessing the stability of a slope group. Based on slope, height, and the degree of dispersion of geological structures, the stability of slopes within the slope group is initially classified. After obtaining initial stability evaluation data for each slope within the range of the slope group, the slopes are classified to obtain the stability attributes of each slope. Then, considering the impact of unstable slopes on the stability of surrounding slopes, the forced instability value and comprehensive stability value of slopes with different stability attributes are obtained. The method also calculates the slope group stability index, slope group risk entropy value, and failure potential index, which respectively reflect the degree of stability of the slope group as a whole, the uncertainty of the stability distribution of the slope group, and the possibility of failure of the slope group as a whole. The slope group stability index, slope group risk entropy value, and failure potential index are mapped onto a three-dimensional risk assessment table for the slope group to obtain a more comprehensive and accurate risk level of the slope group. This method can be applied to the field of slope group risk assessment to improve the accuracy of slope group stability prediction. Detailed Implementation

[0030] This embodiment provides a method for assessing the stability of a slope group, including the following operations:

[0031] S1. Based on slope, height, and the degree of dispersion of geological structure, obtain the initial stability evaluation data of each slope within the area to be evaluated; based on the mapping relationship between the initial stability evaluation data and the slope stability evaluation standard, classify each slope and obtain the stability attributes of each slope.

[0032] S2. For slopes with a stable stability attribute, unstable slopes within the neighborhood whose predicted landslide direction is towards the stable slope are considered as affected slopes of the corresponding stable slope. Based on the number of affected slopes, the forced instability value of the stable slope is obtained. For slopes with a generally stable stability attribute, the safety factor of the generally stable slope is obtained based on the corresponding slope geological data, and this is used as the initial stability value of the generally stable slope. Based on the number, distance, and predicted sliding area of ​​unstable slopes within the neighborhood whose predicted landslide direction is towards the generally stable slope, the forced instability value of the generally stable slope is obtained. Based on the initial stability value and the forced instability value, the comprehensive stability value of the generally stable slope is obtained. For slopes with an unstable stability attribute, the safety factor of the unstable slope is obtained, and this is used as the initial stability value of the unstable slope. The forced instability value of the unstable slope is obtained, and based on the initial stability value and the forced instability value, the comprehensive stability value of the unstable slope is obtained.

[0033] S3. Based on the number and forced instability values ​​of all stable slopes, the number and comprehensive stability values ​​of all generally stable slopes, and the number and comprehensive stability values ​​of all unstable slopes within the area to be evaluated, obtain the slope group stability index, slope group risk entropy value, and failure potential index; map the slope group stability index, slope group risk entropy value, and failure potential index onto the three-dimensional risk assessment table of the slope group, and map the highest-level slope risk level as the risk level of the slope group.

[0034] S1. Based on slope, height, and the degree of dispersion of geological structure, obtain the initial stability evaluation data of each slope within the area to be evaluated; based on the mapping relationship between the initial stability evaluation data and the slope stability evaluation standard, classify each slope and obtain the stability attributes of each slope.

[0035] Based on slope, height, and the degree of dispersion of geological structure, the stability of slopes within a slope group is initially classified. After obtaining the initial stability evaluation data of each slope within the range of the slope group, the slopes are classified to quickly obtain the stability attributes of each slope. This facilitates the subsequent application of different evaluation methods for different types of slopes, thereby improving efficiency while enhancing the accuracy of the evaluation.

[0036] Based on slope, height, and the dispersion of geological structures (such as faults and fissures), rapid stability assessment of multiple slopes over a large area can be achieved, obtaining initial stability evaluation data for each slope within the assessment area (the area where the slope group is located). The dispersion of geological structures is obtained based on the number of geological structures per unit area and the distance between geological structures (the average distance between all geological structures) within the region of interest of the slope. Specifically, the ratio of the distance between geological structures to the number of geological structures per unit area within the region of interest of the slope is normalized to obtain the dispersion of geological structures.

[0037] The specific method for obtaining the initial stability evaluation data of the slope is as follows.

[0038] Step 1: Substitute the slope, height, and geological structure dispersion of the slope into their respective piecewise stability grading assessment functions to obtain several stability values ​​for slope, height, and geological structure dispersion. Each stability grading assessment function contains multiple levels of stability values ​​to reflect the tendency of the indicators to belong to different types of slopes.

[0039] The piecewise function for stability grading assessment based on slope, height, or degree of geological structure dispersion is as follows:

[0040] When x ≤ X1, θ x,1 =1,θ x,2 =0, θ x,3 =0;

[0041] When X1 < x < X2,

[0042] When x ≥ X2, θ x,1 = 0, θ x,2 = 0, θ x,3 = 1;

[0043] x is the slope or height or degree of dispersion of geological structure, X1 is the first threshold of the slope or height or degree of dispersion of geological structure, X2 is the second threshold of the slope or height or degree of dispersion of geological structure, the second threshold is greater than the first threshold, θ x,1 is the first-level slope evaluation stability value of the slope or height or degree of dispersion of geological structure (the greater the first-level slope evaluation stability value, the greater the tendency to belong to a stable slope), θ x,2 is the second-level slope evaluation stability value of the slope or height or degree of dispersion of geological structure (the greater the second-level slope evaluation stability value, the greater the tendency to belong to a generally stable slope), θ x,3 is the third-level slope evaluation stability value of the slope or height or degree of dispersion of geological structure (the greater the third-level slope evaluation stability value, the greater the tendency to belong to an unstable slope).

[0044] Step 2: Based on a number of slope evaluation stability values, height evaluation stability values and geological structure dispersion degree evaluation stability values, construct a stability classification matrix. In the stability classification matrix, the values in the same column reflect the tendency of the slope to belong to the same stable attribute slope, that is, the values in the first column, the second column and the third column respectively reflect the tendency of belonging to a stable slope, a generally stable slope and an unstable slope. In this way, the stable attribute of the slope can be comprehensively evaluated from multiple aspects, and the accuracy of the classification can be improved.

[0045] The stability classification matrix Q is as follows:

[0046]

[0047] θ 1,i is the slope evaluation stability value corresponding to the slope, θ 2,i is the height evaluation stability value corresponding to the height, θ 3,i is the geological structure dispersion degree evaluation stability value corresponding to the degree of dispersion of geological structure, i = 1, 2, 3.

[0048] Step 3: Multiply the weight matrix formed by the slope weight, height weight, and geological structure dispersion weight of the slope with the stability classification matrix to obtain a one-dimensional slope stability classification assessment matrix (with 1 row). In the slope stability classification assessment matrix, the first data represents the degree of tendency of the slope to be a stable slope, the second data represents the degree of tendency of the slope to be a generally stable slope, and the third data represents the degree of tendency of the slope to be an unstable slope, which makes it easy to intuitively obtain the probability of the slope belonging to different stability attribute types. Use the slope stability classification assessment matrix as the initial stability evaluation data.

[0049] Based on the mapping relationship between the initial stability evaluation data and the slope stability assessment criteria, each slope is classified to obtain its stability attribute. The slope stability assessment criteria are as follows: the stability attribute corresponding to the maximum value in the slope stability classification assessment matrix is ​​taken as the slope's stability attribute. For example, if the second largest value in the slope stability classification assessment matrix is ​​the general stability type, then the slope is considered to have a stable attribute.

[0050] S2. Obtain the forced instability value and comprehensive stability value of slopes with different stability properties respectively.

[0051] Slopes within a slope group often interact with each other. The instability of one slope can alter the stress state and soil properties of surrounding slopes. Considering this influence allows for a more realistic simulation of the actual stability behavior of the slope group, avoiding errors caused by isolated analysis of individual slopes and making the prediction results more consistent with reality. Furthermore, slopes with different stability attributes, such as stable, basically stable, and unstable, exhibit varying instability probabilities and influencing factors. Developing different calculation methods for each type can more accurately capture the characteristics of each slope type, thereby improving the overall prediction accuracy.

[0052] S2.1 Obtain the forced instability value of a stable slope.

[0053] Stable slopes generally do not experience instability and landslides. However, when nearby slopes become unstable, the original stress field may change, leading to a redistribution of stress in the stable slope. This may cause local stress concentration, thereby reducing the stability of the stable slope.

[0054] Therefore, in order to improve the accuracy of slope assessment, this embodiment takes unstable slopes within the neighborhood whose predicted sliding direction is towards the stable slope as the affected slopes of the corresponding stable slope for slopes with a stable stability attribute; and obtains the forced instability value of the stable slope based on the number of affected slopes.

[0055] The forced instability value of a stable slope is obtained by the following formula:

[0056] P1 = 1 - e -λN ,

[0057] P1 is the forced instability value of a stable slope, N is the total number of slopes affected by the stable slope, and λ is the quantitative influence coefficient, which can be determined by statistical analysis of a large amount of slope data and by methods such as maximum likelihood estimation.

[0058] S2.2 Obtain the comprehensive stability value of a general stable slope.

[0059] For slopes with a generally stable stability attribute, based on the corresponding slope geological data, a safety factor is obtained for the generally stable slope, serving as the initial stability value. The forced instability value is also obtained. Based on the initial stability value and the forced instability value, the overall stability value of the generally stable slope is obtained. The above-mentioned operation of obtaining the safety factor for generally stable slopes can be achieved using methods such as the Swedish slice method or the Bishop method.

[0060] Since the stability of a generally stable slope is worse than that of a stable slope, it is easily affected by the instability of nearby slopes. Therefore, the calculation method of the forced instability value of a stable slope is no longer applicable to a generally stable slope. In order to improve the accuracy of the forced instability value of a generally stable slope, this embodiment takes the unstable slopes in the neighborhood whose predicted sliding direction is toward the stable slope as the affected slopes of the corresponding generally stable slope; based on the number of affected slopes, distance and predicted sliding area, the forced instability value of the generally stable slope is obtained.

[0061] The forced instability value of a generally stable slope is obtained by the following formula:

[0062]

[0063] P2 is the forced instability value of a generally stable slope, N is the total number of affected slopes of the generally stable slope, k is the area influence coefficient, and A n Let g(d) be the predicted sliding area of ​​the nth influencing slope. n ) represents the distance attenuation value affecting the nth slope, which is the attenuation effect of slope distance on the degree of influence of a generally stable slope. α is the distance influence coefficient, and d n Let A be the distance between the nth influencing slope and the generally stable slope; for each slope within its neighborhood, predict the sliding area A. n The larger the value, the greater the probability of its impact on a generally stable slope, while the distance d... n The farther away, the smaller the probability of impact on a generally stable slope, as indicated by the distance attenuation index g(d). nTo reflect this distance effect, the influence of all neighboring areas that do not affect the slope is accumulated, and then the probability of the target slope becoming unstable is calculated in the form of an exponential function. The above k and α are determined based on specific geological data and engineering experience. k and α can be fitted by statistical analysis of slope instability cases that have occurred under similar geological conditions, or by using numerical simulation software to perform a large number of simulation calculations.

[0064] The overall stability value of a generally stable slope is obtained by the following formula: S z =S0(1-P2), S z S0 is the overall stable value, and S0 is the initial stable value.

[0065] S2.3 Obtain the forced instability value of a stable slope.

[0066] For slopes with an unstable stability property, obtain the safety factor of the unstable slope as the initial stability value of the unstable slope; obtain the forced instability value of the unstable slope; and obtain the comprehensive stability value of the unstable slope based on the initial stability value and the forced instability value.

[0067] The methods for obtaining the safety factor and comprehensive stability value of the aforementioned unstable slopes are similar to those for general stable slopes, and will not be repeated here to save space.

[0068] S3. Based on the number and forced instability values ​​of all stable slopes, the number and comprehensive stability values ​​of all generally stable slopes, and the number and comprehensive stability values ​​of all unstable slopes within the area to be evaluated, obtain the slope group stability index, slope group risk entropy value, and slope group failure potential index; map the slope group stability index, slope group risk entropy value, and slope group failure potential index onto the three-dimensional risk assessment table of the slope group, and map the highest-level slope risk level as the risk level of the slope group.

[0069] Based on the number of all slopes, the forced instability value of stable slopes, and the comprehensive stability value of generally stable and unstable slopes, we obtain slope group stability index, slope group risk entropy value, and failure potential index, which respectively reflect the degree of stability of the slope group as a whole, the uncertainty of the stability distribution of the slope group, and the possibility of failure of the slope group as a whole. These are then mapped onto a three-dimensional risk assessment table for the slope group to obtain a more comprehensive and accurate risk level for the slope group, thereby improving the accuracy of slope group stability prediction.

[0070] The slope group stability index is calculated using the following formula:

[0071]

[0072] G is the slope group stability index, P1 is the forced instability value of a stable slope, and S z,1 S represents the comprehensive stability value of a typical stable slope. z,2 The overall stability index represents the stability value of unstable slopes. M, N, and O represent the number of stable slopes, moderately stable slopes, and unstable slopes, respectively. A higher slope group stability index indicates a more stable overall slope group, while a lower index indicates poorer overall stability and a higher probability of instability and failure.

[0073] The risk entropy value of the slope group is calculated using the following formula:

[0074] R = D1·p1(-ln(p1)) + D2·p z,1 (-ln(p z,1 ))+D3·p z,2 (-ln(p z,2 )),

[0075]

[0076] R is the risk entropy value of the slope group, p1 is the ratio of stable slopes to all slopes, p z,1 p represents the ratio of generally stable slopes to all slopes. z,2 D1 represents the ratio of unstable slopes to all slopes; D2 and D3 represent the location dispersion coefficients of stable slopes, generally stable slopes, and unstable slopes, respectively. The location dispersion coefficient of stable slopes is obtained based on the sum of the average distances of each stable slope to other stable slopes, and the sum of the average distances of all slopes to other slopes (specifically, it is the ratio of the sum of the average distances of all stable slopes to other stable slopes to the sum of the average distances of all slopes to other slopes). The methods for obtaining the location dispersion coefficients of generally stable slopes and unstable slopes are similar to those for stable slopes. The higher the risk entropy value of a slope group, the less concentrated the distribution of slopes with the same stability attribute, the more overlapping the distribution of slopes with different stability attributes, the stronger the domino effect, the more uncertain the risks faced by the slope group, the more complex the combination and changes of risk factors, the more difficult it is to accurately predict and control, and the higher the potential risk level.

[0077] The slope group failure potential index is derived from the number and comprehensive stability value of generally stable and unstable slopes. The slope group failure potential index is calculated using the following formula:

[0078]

[0079] Let \(F\) be the failure potential index of the slope group, and \(w\) be the weight coefficient, which is used to adjust the contribution degree of the general stable slope to the failure potential. Here, \(0 < w < 1\). Since the failure possibility of the general stable slope is lower than that of the unstable slope, the weight \(w\) is introduced to reflect this difference. The higher the value of the failure potential index of the slope group, the more general stable slopes and unstable slopes exist in the slope group, which are in a critical state or have a high failure risk, and are more likely to fail and be damaged as a whole.

[0080] After mapping the slope group stability index, the slope group risk entropy value, and the slope group failure potential index to the three-dimensional slope group risk assessment table, the corresponding first slope risk mapping level, second slope risk mapping level, and third slope risk mapping level are obtained respectively; among the first slope risk mapping level, the second slope risk mapping level, and the third slope risk mapping level, the slope risk mapping level with the highest risk level (low risk or medium risk or high risk) is used as the slope group risk level. The risk levels are, from large to small: low risk, medium risk, high risk.

[0081] To facilitate the understanding of the risk level division of the three-dimensional slope group risk assessment table, an example is shown in Table 1.

[0082] Table 1 Schematic Table of Three-Dimensional Slope Group Risk Assessment

[0083]

[0084] This embodiment also provides a slope group stability assessment system for implementing the above-mentioned slope group stability assessment method, including:

[0085] A slope stability attribute generation module, which is used to obtain the initial stability evaluation data of each slope within the range of the area to be evaluated based on the slope, height, and degree of geological structure dispersion; classify each slope based on the mapping relationship between the initial stability evaluation data and the slope stability evaluation criteria, and obtain the stability attributes of each slope.

[0086] The slope forced instability value and comprehensive stability value generation module is used as follows: For slopes with a stability attribute of stable type, it identifies unstable slopes within the neighborhood whose predicted landslide direction is towards the stable slope as the affected slopes of the corresponding stable slope; based on the number of affected slopes, it obtains the forced instability value of the stable slope; For slopes with a stability attribute of generally stable type, it obtains the safety factor of the generally stable slope based on the corresponding slope geological data, as the initial stability value of the generally stable slope; Based on the number, distance, and predicted sliding area of ​​unstable slopes within the neighborhood whose predicted landslide direction is towards the generally stable slope, it obtains the forced instability value of the generally stable slope; Based on the initial stability value and the forced instability value, it obtains the comprehensive stability value of the generally stable slope; For slopes with a stability attribute of unstable type, it obtains the safety factor of the unstable slope as the initial stability value of the unstable slope; It obtains the forced instability value of the unstable slope, and Based on the initial stability value and the forced instability value, it obtains the comprehensive stability value of the unstable slope;

[0087] The slope group risk level generation module is used to obtain the slope group stability index, slope group risk entropy value, and failure potential index based on the number and forced instability value of all stable slopes, the number and comprehensive stability value of all generally stable slopes, and the number and comprehensive stability value of all unstable slopes within the area to be assessed. The slope group stability index, slope group risk entropy value, and failure potential index are mapped to the slope group risk three-dimensional assessment table, and the highest-level slope risk is mapped as the risk level of the slope group.

[0088] This embodiment also provides a slope group stability assessment device, including a processor and a memory, wherein the processor executes a computer program stored in the memory to implement the above-described slope group stability assessment method.

[0089] This embodiment also provides a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the above-described slope group stability assessment method.

[0090] This embodiment provides a slope group stability assessment method. Based on slope, height, and the degree of dispersion of geological structures, it initially classifies the stability of slopes within a slope group. After obtaining initial stability evaluation data for each slope within the range of the slope group, the slopes are classified to obtain the stability attributes of each slope. Then, considering the impact of unstable slopes on the stability of surrounding slopes, the forced instability value and comprehensive stability value of slopes with different stability attributes are obtained. The method also calculates the slope group stability index, slope group risk entropy value, and failure potential index, which reflect the overall stability of the slope group, the uncertainty of the slope group stability distribution, and the probability of failure of the slope group. The slope group stability index, slope group risk entropy value, and failure potential index are mapped onto a three-dimensional slope group risk assessment table to obtain a more comprehensive and accurate slope group risk level. This method can be applied to the field of slope group risk assessment to improve the accuracy of slope group stability prediction.

Claims

1. A method for assessing the stability of a group of slopes, characterized in that, This includes the following operations: S1. Substitute the slope, height, and geological structure dispersion of the slope into their respective piecewise stability grading assessment functions to obtain several stable values ​​for slope assessment, height assessment, and geological structure dispersion assessment. Based on these stable values, construct a stability grading matrix. Multiply the weight matrix formed by the slope weight, height weight, and geological structure dispersion weight with the stability grading matrix to obtain the slope stability grading assessment matrix. Use the slope stability grading assessment matrix as the initial stability evaluation data. Based on the mapping relationship between the initial stability evaluation data and the slope stability assessment standard, each slope is classified to obtain the stability attributes of each slope. S2. For slopes with a stable property, unstable slopes within the neighborhood whose predicted sliding direction is towards the stable slope are considered as the affected slopes of the corresponding stable slope; based on the number of affected slopes, the forced instability value of the stable slope is obtained. For slopes with a generally stable stability attribute, the safety factor of the generally stable slope is obtained based on the corresponding slope geological data, and is used as the initial stability value of the generally stable slope. Based on the number, distance, and predicted sliding area of ​​unstable slopes within the neighborhood with the predicted sliding direction of the landslide towards the generally stable slope, the forced instability value of the generally stable slope is obtained. Based on the initial stability value and the forced instability value, the comprehensive stability value of the generally stable slope is obtained. For slopes with an unstable stability property, obtain the safety factor of the unstable slope as the initial stability value of the unstable slope; obtain the forced instability value of the unstable slope; and obtain the comprehensive stability value of the unstable slope based on the initial stability value and the forced instability value. S3. Based on the number and forced instability value of all stable slopes, the number and comprehensive stability value of all generally stable slopes, and the number and comprehensive stability value of all unstable slopes within the area to be evaluated, obtain the slope group stability index, slope group risk entropy value, and failure potential index. The failure potential index is derived from the number and overall stability value of generally stable and unstable slopes. The slope group stability index, slope group risk entropy value, and failure potential index are mapped onto the three-dimensional risk assessment table of the slope group, and the highest-level slope risk is mapped as the risk level of the slope group.

2. The method for assessing the stability of a slope group according to claim 1, characterized in that, The piecewise function for grading stability based on slope or height is as follows: when hour, , , ; when hour, , , ; when hour, , , ; For slope or height, The first threshold for slope or height. The second threshold is the slope or height, and the second threshold is greater than the first threshold. The first-order slope stability assessment value is used for slope or height. For the second-order slope assessment of slope or height, a stability value is provided. The stability value is assessed for the three-level slope, either in terms of gradient or height.

3. The method for assessing the stability of a slope group according to claim 1, characterized in that, The specific standard for slope stability assessment is as follows: the stability attribute corresponding to the maximum value of the data in the slope stability classification assessment matrix is ​​taken as the stability attribute of the slope.

4. The method for assessing the stability of a slope group according to claim 1, characterized in that, The forced instability value of a generally stable slope is obtained by the following formula: ， ， This represents the forced instability value for a generally stable slope. N This represents the total number of slopes affected by a typical stable slope. This is the area influence coefficient. For the first n The predicted sliding area affecting the slope. For the first n A distance attenuation value that affects the slope. This is the distance influence coefficient. For the first n The distance between an influencing slope and a generally stable slope.

5. The method for assessing the stability of a slope group according to claim 1, characterized in that, In S1, the degree of dispersion of geological structures is obtained based on the number of geological structures per unit area and the spacing between geological structures within the region of interest of the slope.

6. A slope group stability assessment system, used to implement the slope group stability assessment method according to claim 1, characterized in that, include: The slope stability attribute generation module is used to obtain initial stability evaluation data for each slope within the area to be evaluated, based on slope, height, and the degree of dispersion of geological structures. Based on the mapping relationship between the initial stability evaluation data and the slope stability assessment standard, each slope is classified to obtain the stability attributes of each slope. The slope forced instability value and comprehensive stability value generation module is used as follows: For slopes with a stability attribute of stable type, it identifies unstable slopes within the neighborhood whose predicted landslide direction is towards the stable slope as the affected slopes of the corresponding stable slope; based on the number of affected slopes, it obtains the forced instability value of the stable slope; For slopes with a stability attribute of generally stable type, it obtains the safety factor of the generally stable slope based on the corresponding slope geological data, as the initial stability value of the generally stable slope; Based on the number, distance, and predicted sliding area of ​​unstable slopes within the neighborhood whose predicted landslide direction is towards the generally stable slope, it obtains the forced instability value of the generally stable slope; Based on the initial stability value and the forced instability value, it obtains the comprehensive stability value of the generally stable slope; For slopes with a stability attribute of unstable type, it obtains the safety factor of the unstable slope as the initial stability value of the unstable slope; It obtains the forced instability value of the unstable slope, and Based on the initial stability value and the forced instability value, it obtains the comprehensive stability value of the unstable slope; The slope group risk level generation module is used to obtain the slope group stability index, slope group risk entropy value and failure potential index based on the number and forced instability value of all stable slopes, the number and comprehensive stability value of all generally stable slopes, and the number and comprehensive stability value of all unstable slopes within the area to be evaluated. The slope group stability index, slope group risk entropy value, and failure potential index are mapped onto the three-dimensional risk assessment table of the slope group, and the highest-level slope risk is mapped as the risk level of the slope group.

7. A slope group stability assessment device, characterized in that, It includes a processor and a memory, wherein the processor executes a computer program stored in the memory to implement a slope group stability assessment method as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, Used to store a computer program, wherein the computer program, when executed by a processor, implements a slope group stability assessment method as described in any one of claims 1-5.

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