44 results about "Limit equilibrium method" patented technology

The invention provides a landslide prediction method and system based on big data analysis, and relates to the technical field of big data analysis, and the method comprises the following steps: obtaining multi-source geological data of a target region, constructing a three-dimensional geological model, and dividing slope units; calculating an initial safety coefficient of each slope unit by adopting a limit equilibrium method and Monte Carlo simulation; acquiring real-time monitoring data, establishing an inverse analysis optimization model, and inverting and calibrating physical and mechanical parameters; updating calibration parameters to the model, coupling rainfall infiltration and underground water seepage simulation, dynamically updating a pore water pressure field, and calculating a real-time dynamic safety coefficient; and according to a comparison result of the dynamic safety coefficient and a preset threshold value, determining the stable state of the slope and sending out corresponding early warning. According to the method, through multi-source data fusion, parameter dynamic inversion calibration and real-time hydrological and mechanical coupling simulation, accurate and dynamic evaluation and graded early warning of slope stability are realized, and the accuracy and timeliness of landslide prediction are remarkably improved.

The present invention discloses a full - probability risk quantitative assessment method for the landslide of a muck yard considering the three - dimensional spatial variability of muck, which includes the following steps: conducting borehole exploration of the muck yard site to obtain muck yard data; obtaining random field parameters characterizing the spatial variability of muck; simulating the three - dimensional spatial variation characteristics of muck; based on the limit equilibrium method, conducting the three - dimensional slope stability assessment of the muck yard and estimating the potential landslide volume; simulating the possible migration ranges under various landslide volumes; statistically collecting the life and property data of downstream disaster - bearing bodies, and based on the vulnerability assessment formulas for buildings and personnel, estimating the vulnerability of disaster - bearing bodies according to the landslide intensity; establishing a full - probability risk assessment formula for the muck yard landslide, and conducting quantitative risk assessment and risk rating. The present invention considers the unique spatial variation characteristics of muck, analyzes the stability, potential sliding position and volume from a three - dimensional perspective, and combines with the quantitative vulnerability assessment method to achieve accurate risk assessment.

The invention relates to the technical field of slope engineering data processing, and discloses a soil-rock mixed slope stability rapid simplified analysis method and system, a terminal and a storage medium, and the method comprises the steps: determining model parameters of a soil-rock mixed slope stability rapid simplified analysis model based on a soil-rock mixture strength criterion and parameters obtained through an indoor test; acquiring side slope size information acquired by on-site survey on-site engineering; according to the side slope size information, the safety coefficient of the pure clay side slope is calculated based on a limit equilibrium method; and substituting the model parameters, the stone content and the safety coefficient of the pure clay side slope into the rapid simplified analysis model for the stability of the soil-rock mixed side slope, and solving and outputting the safety coefficient of the soil-rock mixed side slope. The invention provides a simple and practical method for calculating the safety coefficient of the soil-rock mixed slope, and the stability of the soil-rock mixed slope can be quickly and accurately evaluated under the condition of large-range rock content only according to a small amount of indoor tests.

The invention belongs to the technical field of tunnel construction, and discloses a method and a system for determining the supporting force of a shield tunneling machine passing through a river channel height difference stratum.The method comprises the following steps: establishing a model in which a soil body actively damaged in front of a shield tunneling machine excavation face is regarded as a prismoid and a wedge body by combining a wedge body damage theory and a limit equilibrium method; the shield supporting force and the sliding soil body in the limit equilibrium state serve as analysis objects, and the mechanical balance of the shield supporting force and the sliding soil body is analyzed; the riverway undercrossing process is divided into five stages, the excavation face supporting force of each uneven stratum of the undercrossing riverway is calculated, and therefore the magnitude of the shield undercrossing riverway excavation face limit supporting force is determined. According to the method, a wedge-shaped body theoretical calculation model is simplified, complex formulas and tedious calculation steps are avoided, the limit supporting force of a horizontal stratum at the bottom of a river channel, a river channel slope, a non-river-channel bottom layer and junctions of all strata is accurately calculated, supporting force calculation is more suitable for actual engineering conditions, and a foundation is laid for subsequent theoretical analysis and technical development.

The invention discloses a non-coal mine slope stability evaluation method based on multi-working-condition analysis, and the method comprises the steps: obtaining a rock-soil data set, a multi-working-condition data set and a monitoring data set of a non-coal mine slope, carrying out the clustering of the rock-soil data set, and obtaining parameter partitions, based on the parameter partition and the multi-working-condition data set, a patch model is obtained through a patch algorithm, stability evaluation is conducted through a limit equilibrium method by using the parameter partition and the patch model, a first slope stability result is output, a relatively dangerous area is screened out according to the first slope stability result, and the relatively dangerous area is obtained. And performing stability evaluation on the relatively dangerous area through a finite element method, outputting a second stability result of the slope, and taking the second stability result as a final evaluation result. According to the method, an efficient and reliable evaluation result is provided for non-coal mine slope disaster prevention and control through a step-by-step verification process of combining a double-patch model with a limit equilibrium method and a finite element method.

The invention discloses a V-shaped slope stability calculation method and system, and relates to the technical field of open-pit mining. On the basis of a three-dimensional numerical simulation technology, the damage mode of the sliding body is judged, a spatial form equation of a potential sliding body is determined firstly, then the sliding body is divided into micro-strip columns in a regional mode, the stress state of the micro-strip columns is solved through a constitutive relation and a static balance condition, and the force of each row of micro-strip columns is superposed in the direction of a main sliding surface; and obtaining two-dimensional equivalent shear strength parameters with a three-dimensional effect on each row of main sliding surface micro-strip columns by using an equivalent thought, and then deducing a three-dimensional V-shaped slope stability coefficient by using a rigid body limit equilibrium method. According to the method, the problems of high calculation cost, difficulty in parameter determination and complex calculation process in a traditional slope three-dimensional stability calculation method are avoided, the problem of three-dimensional stability of the slope in the special form is solved, a more reliable theoretical technology is provided for design, mining, prevention and treatment of the slope, and the method is worthy of popularization and application. The method has important practical significance for guaranteeing safe and efficient production of mining.

The invention relates to the technical field of slope stability prediction, in particular to a slope stability evolution prediction method of a main shock and aftershock sequence cumulative damage mechanism. The method comprises the following steps: determining an initial strength parameter of a slope sliding surface rock-soil body and a dynamic strength attenuation parameter under the action of a main shock and aftershock sequence through an indoor cyclic load test, and establishing a cumulative damage model; three-dimensional side slope geometric features are obtained, and the spatial orientation and the stress direction of a potential sliding surface are determined; calculating a dynamic sliding force in combination with seismic oscillation parameters, and updating an effective strength parameter and a dynamic anti-sliding force of the sliding surface in real time; and carrying out staged calculation and dynamic evolution analysis by adopting a limit equilibrium method or a strength reduction method. According to the method, by introducing a rock-soil body strength accumulated damage and progressive attenuation mechanism under the cyclic action of the main and aftershock sequences, the damage accumulation process and the stability evolution law of the slope stability along with the development of the main and aftershock sequences are described, so that the progressive instability process and the accumulated instability risk driven by the aftershock after the main shock is triggered can be identified.

The invention discloses a landslide risk monitoring method and system based on multi-source data, and relates to the field of geological monitoring early warning, and the method comprises the steps: obtaining the environment monitoring data of a to-be-monitored slope area, and constructing a multi-dimensional feature matrix according to the environment monitoring data; performing risk prediction classification based on the multi-dimensional feature matrix according to a risk classifier to obtain a landslide risk level, and performing prediction based on the multi-dimensional feature matrix according to a neural network model to obtain a landslide displacement prediction quantity; calculating a landslide stability coefficient according to the environmental monitoring data based on a limit equilibrium method, calculating a rainfall induction threshold by combining the rainfall data and the soil humidity data, and obtaining a landslide comprehensive risk coefficient by integrating the landslide stability coefficient and the rainfall induction threshold; and determining a landslide risk monitoring result of the to-be-monitored slope area in combination with the landslide risk grade, the landslide displacement prediction amount and the landslide comprehensive risk coefficient. According to the application, the technical problem that the existing landslide risk monitoring accuracy is poor can be solved.

The invention belongs to the field of engineering disaster prevention and reduction, and particularly relates to a construction method of a three-dimensional side slope universal potential sliding surface model. According to the method, a three-dimensional side slope universal potential sliding surface is constructed through spatial combination of a main sliding trace line, a secondary sliding trace line and a sliding circumference line, the range of the potential sliding surface is defined through four boundary points of the lower side, the upper side, the left side and the right side, and the potential sliding surface is dispersed in the mode of polar angle equal division of the main sliding trace line and transverse width equal division of a potential sliding body; effective discrete points and discrete grids on the potential sliding surface are recognized, and the reasonability of the potential sliding surface is judged. The method has the advantages of being wide in application range, high in universality, high in reliability and the like, and the problem of determining the potential most dangerous sliding surface of the three-dimensional slope under the complex terrain condition in actual engineering is solved; according to the method, a discrete technology is applied, so that the generation and construction of the sliding surface become simpler and easier, the method can be conveniently combined with an existing limit equilibrium method to carry out three-dimensional slope stability analysis, and a powerful scientific basis is provided for reliable early warning and prevention of slope instability and collapse.

The present invention discloses a fluid boundary prediction method for the instability and collapse of a waste dump, which relates to the field of disaster monitoring. The method comprises: step S1: implementing an initial waste dump fluid movement prediction and marking the initial boundary line of all waste dump fluids; step S2: collecting waste dump parameters, obtaining geological parameters, and dividing the downstream area into downstream plots; step S3: screening out risk plots with potential collapse, and using the limit equilibrium method to calculate the critical sliding depth; step S4: updating all critical sliding depths to a digital elevation model to re-solve the waste dump fluid movement prediction and mark the revised boundary line. The present invention updates the digital elevation model by calculating the volume of the potential collapse area, so that the prediction result is continuously adjusted as the collapse process occurs, avoiding the problem of low prediction accuracy of the waste dump fluid coverage range due to the fixed terrain assumption, and has the advantages of dynamically correcting the boundary of the waste dump collapse fluid trajectory and improving the disaster prevention capability of the collapse.

The application discloses a method for determining support pressure of a tunnel face in opposite excavation, and comprises the following steps: S1, establishing an active failure mode of a soil body of the tunnel face in opposite excavation, wherein the active failure mode comprises a logarithmic spiral wedge-shaped sliding surface failure body in front of two tunnel faces and a semi-elliptical collapse body above and in front of the two tunnel faces; S2, obtaining a moment balance equation of the logarithmic spiral wedge-shaped sliding surface failure body and the semi-elliptical collapse body based on a limit equilibrium method; and S3, reversely deducing a critical support force P of the tunnel face in opposite excavation according to the moment balance equation. The active failure mode and the critical support force P obtained by calculation are reliable and reasonable.

The present application relates to the technical field of geotechnical slope safety, and particularly relates to a soft interlayer-containing bedding slope displacement dynamic safety early warning method and system based on time sequence LSTM. By constructing the step-by-step excavation process of the slope as a time sequence and introducing a long short-term memory neural network model capable of effectively learning long-term dependencies, the accurate simulation of the displacement dynamic cumulative response of the soft interlayer-containing bedding slope during the excavation process is realized. The method effectively overcomes the shortcomings of the existing technology, such as the inability of the limit equilibrium method to reflect time sequence effects, the low calculation efficiency and difficulty in real-time application of the numerical simulation method, and the inability of the static machine learning model to capture the step-by-step excavation path dependence characteristics. The advantage lies in short calculation time, fast iteration speed, and the ability to realize real-time and dynamic prediction of the displacement at each step during the excavation process, thereby providing timely and reliable technical support for slope safety management and risk early warning decision-making during engineering construction, greatly improving the timeliness and accuracy of early warning.

The invention is suitable for the technical field of electric power engineering, and provides a power transmission facility area mountain slope stability calculation method and system, and the method comprises the steps: carrying out the spatial preprocessing of obtained multi-source basic data of a research area, and obtaining the standardized data of a unified space reference; based on the preprocessed standardized data, screening a typical slope according to a preset space index; extracting section lines from the screened typical slope surfaces, and constructing a two-dimensional slope surface geometric model based on the section lines; setting two types of comparison working conditions for each two-dimensional slope geometric model; carrying out slope stability calculation on the two comparison working conditions by adopting a limit equilibrium method to obtain a safety coefficient of the potential sliding surface under each working condition; and comparing and analyzing an influence threshold value of runoff on the slope stability according to the safety coefficient. According to the method, slope stability analysis in a complex geological environment is converted from experience qualitative analysis to data-driven quantitative analysis, and standardized technical support is provided for prevention and control of geological disasters of a power transmission corridor in a southwest karst area.

The application discloses a method for determining support pressure of a tunnel face in opposite excavation, and comprises the following steps: S1, establishing an active failure mode of a soil body of the tunnel face in opposite excavation, wherein the active failure mode comprises a logarithmic spiral wedge-shaped sliding surface failure body in front of two tunnel faces and a columnar collapse body above the two tunnel faces; S2, determining a geometric relationship of the active failure mode, and obtaining a moment balance equation of the logarithmic spiral wedge-shaped sliding surface failure body and the columnar collapse body based on a limit equilibrium method; and S3, reversely deducing and calculating a critical support force P of the tunnel face in opposite excavation according to the moment balance equation. The active failure mode and the critical support force P obtained by calculation are reliable and reasonable.

The present application relates to the technical field of slope stability analysis, and discloses a kind of coal mining influence under the slope stability evaluation method of mining, comprising the following steps: step 1, obtains topographic parameters and rock-soil parameters;Step 2, obtains coal mining related calculation parameters;Step 3, surface movement deformation is determined by double line calculation;The double line calculation includes: I line theoretical calculation and II line numerical calculation;Step 4, compares the surface movement deformation under the influence of mining obtained in double line calculation, and selects surface movement deformation according to preset conditions;Step 5, the slope stability under the influence of mining is calculated by limit equilibrium method;Step 6, comprehensive analysis and evaluation mining slope stability.The present application combines numerical simulation and limit equilibrium method for calculation and analysis, analysis dimension is comprehensive, can reach higher calculation accuracy;It can provide effective and reliable basis for the stability evaluation of mined-out area in mountainous and hilly areas, construction and utilization, reclamation and repair.

This invention relates to the field of geotechnical engineering monitoring and slope stability analysis technology, specifically to a method and system for the layout of slope monitoring points throughout the entire construction and operation cycle. The method acquires multi-source monitoring data and constructs a unified data warehouse through cleaning, format conversion, and spatiotemporal registration. Based on this unified data warehouse, a dynamic risk assessment model coupled with the limit equilibrium method and the finite element method is used to identify target risk areas, and key monitoring variables are identified through global sensitivity analysis. Finally, a multi-objective optimization algorithm is used to solve for the Pareto optimal solution set to determine the location and density of monitoring points. This invention achieves adaptive matching of the monitoring network to changes in geological conditions and dynamic engineering needs throughout the entire cycle, improving the targeting of monitoring and the efficiency of resource allocation.

The application provides a calculation method of passive earth pressure of a foundation pit rock-socketed support pile. The calculation of the passive earth pressure comprises the following steps: setting an angle between a passive sliding surface and a horizontal plane as θ, dividing the earth pressure calculation model into three cases according to the relative position relationship between the sliding surface and a reserved rock shoulder in the pit, and establishing equations according to the static equilibrium condition on the sliding body by using the limit equilibrium method to obtain the passive earth pressure expression of the three cases; deriving the earth pressure expression with respect to θ, setting the equation as 0 to obtain θ' of different cases, comparing θ' with limit angles θ1 and θ2 of the three cases, selecting a suitable θ value to be substituted into the corresponding passive earth pressure equation, respectively obtaining the passive earth pressure of the three cases, and taking the minimum value as the actual passive earth pressure. The application fully considers the passive earth pressure provided by the reserved rock shoulder in the soil-rock combined foundation pit, so that the calculated passive earth pressure is more in line with the field conditions, and the calculation formula is simple and practical.

This invention belongs to the field of tunnel construction technology and discloses a method and system for determining the support force of a shield tunneling machine (TBM) under riverbed strata with elevation differences. This method combines wedge failure theory and the limit equilibrium method, establishing a model that treats the actively failing soil in front of the TBM excavation face as a prism plus a wedge. It analyzes the mechanical equilibrium of the TBM support force and the sliding soil under the limit equilibrium state, dividing the river crossing process into five stages and calculating the support force at the excavation face of each uneven stratum under the river, thereby determining the magnitude of the ultimate support force at the excavation face of the TBM under the riverbed. This invention simplifies the wedge theory calculation model, avoiding complex formulas and cumbersome calculation steps, and accurately calculates the ultimate support force at the bottom of the riverbed, the river slope, the bottom layer without a riverbed, and the boundaries between different strata. This makes the support force calculation more consistent with actual engineering conditions, laying the foundation for subsequent theoretical analysis and technological development.

The application discloses a kind of V-shaped slope stability calculation method and system, it is related to strip mining technical field.Based on three-dimensional numerical simulation technology, determine its failure mode first determine the spatial form equation of potential sliding body, then the sliding body is divided into regional division micro column, through constitutive relation and static equilibrium condition, the stress state of micro column is solved, the force of each row micro column is superposed along the direction of main sliding surface, and the two-dimensional equivalent shear strength parameters with three-dimensional effect on each row of main sliding surface micro column are obtained using equivalent idea, then the three-dimensional V-shaped slope stability coefficient is derived using rigid body limit equilibrium method.The application avoids the problems of high calculation cost, difficult parameter determination and complex calculation process in the traditional three-dimensional slope stability calculation method, solves the three-dimensional stability problem of this special form slope, provides more reliable theory and technology for the design, mining, prevention and management of slope, and has important practical significance for ensuring mining safety and efficient production.

The application discloses a method for automatically searching and evaluating stability of key dangerous blocks in a hydraulic tunnel, which comprises the following steps: constructing a three-dimensional model of the tunnel and automatically identifying all blocks based on a spatial topology algorithm; calculating the safety factor of the blocks by using a rigid body limit equilibrium method, and determining the blocks below a threshold value as dangerous blocks; supporting the exposed excavation surface of the dangerous blocks, calculating the safety factor after supporting, and comparing the safety factor with the threshold value; if the safety factor after supporting is still below the threshold value, adjusting the number of supporting points and repeating the calculation until the requirement is met; and finally outputting the block number, supporting parameters and sliding mode. The method can automatically identify dangerous blocks and optimize the supporting scheme, ensure that the stability of the reinforced blocks meets the requirements, and improve the intelligent level of the tunnel supporting design.

The embodiment of the application provides a slope limit equilibrium method based on shear deformation coordination, relates to the technical field of slope stability analysis, and introduces the mechanical concept of shear deformation coordination into the limit equilibrium method, and after the target slope is discretized into a plurality of strips, mechanical calculation is carried out on each strip, the shear force at the bottom of the first strip to the shear force at the bottom of the n-th strip, the normal force at the bottom of the first strip to the normal force at the bottom of the n-th strip, the interstrip shear force and the interstrip normal force are sequentially solved, the H n+1 of the last strip node is obtained, and iteration is carried out to obtain the safety factor F n+1 of the target slope when the condition is met s , which is the safety factor F s of the target slope finally obtained. In the calculation of the interstrip shear force, the method introduces the basic assumption of deformation coordination, combines the calculation of the interstrip force with deformation, has clear physical meaning, avoids the randomness of the interstrip force assumption of the traditional limit equilibrium method, and makes the calculation result more scientific and reliable.

The invention discloses a slope multi-parameter fusion monitoring and data analysis system, belongs to the technical field of slope monitoring and disaster prevention, and aims to accurately identify the slope instability risk. The system comprises a partition sensing module which divides a slope into a plurality of slope height segmentation units and collects multi-source monitoring data of each slope height segmentation unit; the data transmission module performs edge preprocessing on the multi-source monitoring data and then transmits the multi-source monitoring data to the cloud; the fusion calculation module performs anomaly elimination and feature extraction on the multi-source monitoring data subjected to edge end preprocessing, and then generates a regional instability index by combining a limit equilibrium method with a slope height correction factor; the prediction module divides a cooperative influence unit through a bormor index, and outputs a short-term overall instability probability through a long and short-term neural network; and the visual application module displays the data through a slope height layering GIS and carries out landslide risk judgment according to indexes and probabilities. According to the invention, refined monitoring and accurate short-term prediction are realized, and support is provided for landslide disaster prevention.

The invention relates to the technical field of mine engineering, and provides a surface mine crushing station safe layout method and device based on a critical safety distance, and the method comprises the steps: obtaining the geological information and geomechanical parameters of a target slope of a to-be-built crushing station region; based on geological information and geomechanical parameters, combined with loads generated at different crushing station arrangement positions, an improved limit equilibrium method is adopted to calculate the slope safety coefficient of each crushing station arrangement position; based on the rule that the slope safety coefficient changes along with the arrangement position of the crushing station, the critical safety distance of the crushing station is determined; and the crushing station is arranged at the critical safety distance. According to the embodiment, by calculating the safety relation between the crushing station and the slope, the scientificity and rationality of the design of the crushing station are improved, and the raw coal transportation cost is reduced while the stability and safety of the slope are guaranteed.

The present invention relates to the technical field of slope engineering data processing, and discloses a method, system, terminal, and storage medium for rapidly simplifying the analysis of the stability of a soil-rock mixture slope. The method comprises: determining model parameters of a rapidly simplified analysis model for the stability of a soil-rock mixture slope based on soil-rock mixture strength criteria and parameters obtained from indoor tests; obtaining slope dimension information collected from on-site surveys and field projects; calculating the safety factor of a pure clay slope based on the limit equilibrium method according to the slope dimension information; substituting the model parameters, rock content, and the safety factor of the pure clay slope into the rapidly simplified analysis model for the stability of a soil-rock mixture slope to solve and output the safety factor of the soil-rock mixture slope. The present invention proposes a simple and practical method for calculating the safety factor of a soil-rock mixture slope, which can achieve rapid and accurate assessment of the stability of a soil-rock mixture slope under a wide range of rock content conditions based on only a small number of indoor tests.

This application discloses a method and apparatus for evaluating the seismic stability of slopes with a binary stratigraphic structure, relating to the field of geotechnical engineering. A soil-rock differentiated constitutive model is established, and the spatiotemporal effects of seismic waves are simulated using simple harmonic waves. Dynamic response characteristics are calculated, and a logarithmic spiral slip surface is determined. The vertically segmented slip body is analyzed, and the inertial force resultant is obtained by integrating seismic acceleration. Using the limit equilibrium method, the slope seismic stability coefficient corresponding to the logarithmic spiral slip surface is solved. All potential slip surfaces within the slope are iteratively searched, and the slip surface corresponding to the smallest slope seismic stability coefficient is taken as the most dangerous slip surface. The displacement and acceleration dynamic response laws of the slip body under seismic loading are analyzed to form a comprehensive evaluation system. This method solves the problems of existing methods that still use a single viscoelastic constitutive model, failing to fully consider the differences in dynamic characteristics between soil and bedrock, failing to reflect the geometric boundary conditions of the slope model, and potentially overestimating seismic forces within the slope.

The application discloses a kind of soil slope potential landslide influence range and form prediction method, system, equipment and medium, specific steps are as follows: S1.potential slip surface identification;S2.slip surface and slope intersection is calculated, calculate the area of soil before landslide;S3.after landslide, the area of soil is calculated;S4.according to S3 content, the farthest point distance of soil after landslide is calculated;S5.the obtained post-landslide toe coordinates and the area of soil after landslide are drawn to the slope profile, the influence range and form after potential slip surface sliding can be clearly reconstructed.This application calculates potential slip surface by using Geo-Slope software, which is based on limit equilibrium method, can accurately identify the potential sliding surface of slope, combined with slip surface position function, the volume of sliding body can be accurately calculated.This process combines traditional method with modern computing tools, significantly improves the scientificity and accuracy of landslide prediction.

This invention discloses a method for back-analysis of shear strength parameters of soil in a homogeneous slope under sliding conditions, comprising: collecting crack information of the slope body under sliding conditions and determining the slope safety factor; determining the value range of the shear strength parameters to be inverted; determining the direction and location of cracks and selecting multiple two-dimensional calculation sections of the slope body under sliding conditions; using the geometric coordinate position of the two-dimensional calculation sections at the cracks and the slope safety factor as search constraints, and using the circular arc slip surface search to obtain the potential most dangerous slip surface and the combination of shear strength parameters; and using statistical methods to analyze the combination of shear strength parameters of the potential most dangerous slip surface to obtain the equivalent shear strength parameter combination that satisfies the slope body. This invention can improve the accuracy and reliability of slip surface construction, making the shear strength parameters closer to the actual slope condition, and can also objectively determine the unique or most reasonable equivalent shear strength parameter combination, solving the problem that the solution of shear strength parameters is not unique in the traditional limit equilibrium method back analysis.

The application discloses a dam slope stability analysis method for a dam slope caused by a fault, and specifically relates to the following steps: according to the form of the dam body and the fault position, a fault position for analysis is determined on the dam slope; the maximum vertical dislocation amount and the maximum horizontal variation amount of the fault are obtained from existing geological data, and the settlement of the downstream dam slope at the fault position is determined according to the maximum vertical dislocation amount; the dry bulk density and the saturated bulk density of the dam body material are obtained through a density test in a dam material test, and the Φ0 and the △Φ are obtained through a large triaxial test; the shear strength of the dam body material is reduced in the range of the maximum horizontal variation amount at the determined fault position; the dam slope stability at the determined fault position is calculated; and the dam slope stability at the fault position is evaluated according to the calculation result. The method solves the problem that the existing method cannot quickly and preliminarily determine whether the dam slope is stable when the dam body is caused to fault.

The present invention belongs to the field of engineering disaster prevention and mitigation, and in particular relates to a method for constructing a three-dimensional universal potential sliding surface model for slopes. This method uses the spatial combination of the main sliding track, the secondary sliding track, and the sliding perimeter to construct a three-dimensional universal potential sliding surface for slopes. The four boundary points of the lower side, upper side, left side, and right side are used to define the range of the potential sliding surface. The potential sliding surface is discretized by equally dividing the polar angle of the main sliding track and the lateral width of the potential sliding body. The effective discrete points and discrete grids on the potential sliding surface are identified, and the rationality of the potential sliding surface is determined. The present invention has the advantages of a wide range of applications, strong versatility, and high reliability. It solves the problem of determining the most dangerous potential sliding surface of three-dimensional slopes under complex terrain conditions in actual engineering. The present invention uses discrete technology to make the generation and construction of sliding surfaces simpler and easier, and can also be combined with existing limit equilibrium methods to carry out three-dimensional slope stability analysis, providing a strong scientific basis for reliable early warning and prevention of slope instability and landslides.

The application provides an ice-water accumulation body bank collapse prediction method based on the limit equilibrium method, relates to the technical field of reservoir safety, and obtains a complete topographic profile by topographic surveying on an ice-water accumulation body slope, constructs an MP model in combination with the mechanical parameters of the ice-water accumulation body slope, analyzes the stability of the ice-water accumulation body slope in the MP model by the limit equilibrium method, obtains an analysis result, and if the part with the stability less than 1 in the analysis result is located on water, the part with the stability less than 1 located on water is accumulated under water according to the underwater stability slope angle, bank collapse is simulated, a new topographic profile is obtained, the MP model is reconstructed, iteration is carried out, until the ice-water accumulation body slope cannot collapse, the overall width of the part with the stability less than 1 located on water is counted as the predicted bank collapse width, the problem that the existing ice-water accumulation body bank collapse prediction error is large is solved, and the application is suitable for ice-water accumulation body bank collapse prediction.