106 results about "Engineering geology" patented technology

The invention belongs to the field of geotechnical engineering and engineering geological information modeling, and relates to a stratum-parameter coupling randomness three-dimensional random field modeling and shield construction ground surface settlement rapid prediction method and device based on multi-source data fusion. According to the method, a three-dimensional joint random field acting on stratum types and rock-soil key physical property parameters at the same time can be constructed under the joint constraint of multi-source data such as drilling, geophysical prospecting, geotechnical tests and terrains, and a calibrated, explainable and updatable geological section automatic generation and uncertainty quantification channel is formed; on the premise that geological rationality is guaranteed, section geometry and parameter distribution under the conditions of complex structures and lateral phase change are restored robustly, the accuracy, consistency and interpretability of the three-dimensional geological section are remarkably improved, and a combined uncertainty result which can be directly used for rapid prediction and risk assessment of shield construction settlement is output. The technical problems that a geological section generated by an existing method is not accurate enough, uncertainty is difficult to quantify, and the extrapolation capacity of a complex scene is weak are solved.

The invention discloses an engineering geology grouting reinforcement device, and relates to the field of geology grouting reinforcement, the engineering geology grouting reinforcement device comprises a mounting rack, the mounting rack is fixedly connected with a first telescopic driving part, the output end of the first telescopic driving part is fixedly connected with a mounting plate, and the mounting plate is fixedly connected with a grouting pipe. The grouting pipe is used for pressurizing and grouting, so that the grout enters a reinforcing gap under the action of pressure; after filling is conducted for a period of time, the injection-compression pipe moves downwards, the sealing plate blocks the grouting opening under the action of the spring to prevent grout from flowing back, meanwhile, the injection-compression pipe moves downwards to extrude the grout, the extrusion force is further increased, and geological gaps are filled with the grout more sufficiently. Through the reciprocating operation, the geological reinforcement position can be fully grouted, the stability and strength of the geological structure are effectively enhanced, the quality and reliability of grouting reinforcement are greatly improved, and the reinforcement requirement under the complex geological condition is met.

The invention discloses a dangerous rock falling motion feature analysis method based on discrete element simulation, and belongs to the technical field of engineering geology. Comprising the steps that dangerous rock data are collected through multiple means and preprocessed, and a three-dimensional visual dangerous rock mass initial model is constructed; based on the three-dimensional visual dangerous rock mass initial model, constructing a discrete element model, defining contact types and parameters among joint units by adopting a Hertz-mindlin contact theory, and determining normal contact force; based on the discrete element model and the normal contact force, a discrete element simulation technology is adopted, multi-physical field factors are considered to simulate dangerous rock falling movement, a discrete element model simulation result is obtained, a dynamic updating method is adopted for joint failure judgment, and the discrete element model is verified through an indoor physical model test and field monitoring data. And designing and implementing a prevention project according to a simulation result, thereby effectively preventing dangerous rock falling disasters and ensuring project safety.

The invention discloses a stratigraphic water content layering inversion method based on a shallow seismic full waveform, and relates to the technical field of geophysical exploration data processing, and the method comprises the following steps: 1, under the same survey line condition, synchronously obtaining a seismic wave full waveform, complex impedance and an induced polarization frequency spectrum; 2, constructing a layered initial model containing a layer boundary line and an in-layer water content initial value; based on the layered initial model, executing dual-domain quantile alignment interface keeping iteration until convergence, and obtaining a final layer boundary line and an in-layer water content field; the double-domain quantile alignment interface maintaining iteration comprises the following steps: updating an in-layer moisture content field and a layer boundary line according to a seismic wave full waveform; and performing total variation regularization processing on the updated in-layer water content field to maintain the transition characteristic of the layer boundary line. According to the method, an efficient and reliable solution with actual guidance value is provided for mineral resource exploration, geological structure detection, groundwater survey and engineering geology evaluation.

The invention belongs to the technical field of underground engineering and computer-aided engineering analysis, and particularly relates to an anti-seismic safety collaborative analysis method for multi-modal data of proximity tunnel engineering. By integrating engineering geology, structural design, construction monitoring and multi-level seismic oscillation data, a three-dimensional numerical model fusing geology and structural information is constructed. Firstly, refined simulation of the whole construction process and the operation static load is carried out, and a reference mechanical state is obtained; carrying out multi-task condition earthquake dynamic time history analysis on the basis, dynamically capturing dynamic response of surrounding rock and a structure, carrying out collaborative interpretation on static and dynamic analysis results, emphatically analyzing spatio-temporal evolution and connectivity risks of a tunnel anchor and an adjacent highway tunnel surrounding rock plastic zone, and extracting a plurality of quantitative collaborative indexes; and an interactive analysis report integrating a three-dimensional visual scene, a multi-dimensional comparison chart and a rule base-based safety interpretation conclusion is automatically generated, and systematic decision support is provided for seismic design, construction control and safety evaluation of proximity projects.

The invention discloses a rock slope multi-mode instability probability analysis and risk evaluation method based on a drilling constraint condition random field, and belongs to the technical field of geotechnical engineering and engineering geology. According to the method, the conditional random field which is strictly consistent with the actually measured data is constructed under the condition of limited drilling exploration data, so that the reasonable expression of the spatial heterogeneity of the rock mass mechanical parameters is realized, and the authenticity of a numerical model and the reliability of an analysis result are greatly improved; the defect of insufficient result credibility caused by lack of actual measurement constraint of the unconditional random field is effectively overcome; through a large amount of multi-sample numerical simulation, multiple instability modes possibly occurring on the rock slope under different parameter space distribution conditions can be identified, the occurrence probability of each instability mode is quantitatively calculated, various risks possibly existing on the slope can be comprehensively grasped, only the most dangerous single condition is concerned, and the risk assessment accuracy is improved. And the accuracy and engineering applicability of slope stability analysis and risk evaluation are improved.

The invention discloses a response test method and device for soil layer deformation and tunnel stress in foundation pit excavation, and relates to the technical field of underground engineering tests. The method comprises the following steps: acquiring engineering geology and tunnel structure parameters, and constructing a geological tunnel coupling similarity model embedded with a layered sensing array; step-by-step excavation is adopted to simulate foundation pit construction, and soil layer displacement strain, tunnel stress contact pressure and excavation disturbance parameters are synchronously collected through multiple channels; constructing a deformation stress coupling prediction model and an excavation disturbance quantification model; and constructing a dynamic coupling response model based on the two, and outputting a dynamic coupling curve of soil layer deformation and tunnel stress. The device comprises a model box body, a data processing host and a display terminal, a layered sensing array, a dynamic loading device, a servo excavation mechanism and a multi-channel data acquisition instrument are arranged in the box body, and the whole test process integrated operation can be realized. According to the method, the dynamic coupling rule can be accurately captured, and technical support is provided for safety assessment and parameter optimization of underground engineering construction.

The invention relates to the technical field of intelligent calculation of earth-rock work amount, and discloses an earth-rock calculation method and device for wind power plant road construction and a storage medium. Comprising the following steps: S1, acquiring topographic point cloud, engineering geology and meteorological time series data of a wind power plant construction area through sensing equipment; s2, constructing a topographic map structure, generating an adjacent matrix and extracting space-time diagram convolution features; s3, constructing and solving a dynamic differential model based on the features, and predicting the volume change of earthwork; s4, improving the solving efficiency by adopting a mixed precision heterogeneous calculation strategy; and S5, introducing a geomechanical constraint optimization prediction result, and outputting a construction area earth-rock distribution diagram. According to the method, the spatial structure characteristics of the complex terrain of the wind power plant are extracted by adopting the graph convolutional neural network, a high-fidelity modeling effect on the terrain form of the road construction area is realized, and the defect that terrain detail information is difficult to express is overcome.

The invention provides a rock mass section area measuring device in a point load test, and relates to the technical field of geotechnical engineering and engineering geology. Comprising an external model framework, a profiling support mechanism, a pressure sensing positioning unit and a data acquisition and analysis system, the profiling supporting mechanism and the pressure sensing positioning unit are fixed in the integral external frame; the profiling supporting mechanism is clamped on the upper portion in a frame through the difference of the inner diameter and the outer diameter of the external model frame to form mechanical interlocking, and the lower portion of the profiling supporting mechanism is arranged above the pressure sensing positioning unit through a reserved positioning hole. The pressure sensing and positioning unit is a distributed array pressure sensor combination, and the data acquisition and analysis system is connected with the pressure sensing and positioning unit to reflect monitoring data. Pressure distribution data of a rock contact area are collected in real time through the pressure sensing and positioning unit, and the data collection and analysis system is combined with signal processing, shape recognition and 3D modeling technologies to achieve rock shape analysis and visual visualization and calculate the sectional area of the rock contact area in real time.

The invention belongs to the field of engineering geology, particularly relates to an engineering geology soil layer name judgment system, method and equipment carried on a static sounding instrument, and aims to solve the problem that real-time dynamic soil layer name presumption cannot be carried out in an existing geotechnical engineering investigation technology. The system comprises a spectrum acquisition module which comprises a spontaneous light source and a multispectral sensor and is integrated between static sounding probe rods; the data processing module is used for analyzing the spectral data through a neural network and processing end resistance / side resistance / friction resistance ratio data of static sounding through a regression algorithm; and the data output module compares the two types of judgment results: outputting a single soil layer name when the two types of judgment results are consistent, and outputting double results and converting the double results into standard results for display when the two types of judgment results are inconsistent. According to the method, the soil layer name is presumed by adopting a real-time dynamic method, the detected sample does not need to be remodeled, the recognition accuracy and efficiency are improved, the model is fed back and optimized according to a new test set, the prediction precision is kept, and the detection speed is improved.

The application discloses a geothermal well and recharging well fracturing construction process, and determines the well position and well depth of the geothermal well according to engineering geology and hydrogeology conditions; drilling is conducted at the well position of the geothermal well, the construction of the geothermal well is conducted, and well cementation and well washing of the geothermal well are conducted; an initial value of the radius of the heat extraction influence range of the geothermal well during heat extraction is obtained; whether the initial value is smaller than a first threshold value is judged, if yes, fracturing holes are processed on the well wall of the heat extraction section in the geothermal well, and the heat extraction section is subjected to staged fracturing to form fracturing gaps; the well position and well depth of the recharging well are determined; drilling is conducted at the well position of the recharging well, the construction of the recharging well is conducted, and well cementation and well washing of the recharging well are conducted; fracturing holes are processed on the well wall of the recharging section in the recharging well, and the recharging section is subjected to staged fracturing to form fracturing gaps. The geothermal well and recharging well fracturing construction process of the embodiment of the application can improve geothermal energy flow and reduce disturbance to the stratum.

The application provides a fault identification method and system based on multi-element spectral mineral anomaly analysis, relates to the fields of geology, spectroscopy, petrology and engineering geology, and a specific scheme comprises the following steps: in-situ testing of tunnel surrounding rock is carried out by using a visible light-near infrared, mid-infrared and laser Raman spectrometer, and mixed spectral variation characteristics are extracted; based on the mixed spectral variation characteristics, the mineral composition of the tunnel surrounding rock is identified according to the spectral identification standard of the abnormal mineral combination of the fault zone, quantitative inversion of the minerals is carried out, and the mineral content is obtained; according to the mineral anomaly mode of the fault zone, mineral anomaly analysis is carried out on the mineral composition, and the mineral anomaly type is obtained; based on the differential change of the mineral content and the mineral anomaly type, mineralogical anomaly characteristic analysis is carried out, and the fault identification result is output; the application replaces the experience knowledge of traditional geologists with quantitative information of multi-element spectral mineral anomaly, and further improves the accuracy and efficiency of fault identification in tunnels and underground engineering.

The invention belongs to the field of classification and identification of soil in engineering geology, and particularly relates to a method and system for measuring the particle size and grading of soil layer particles based on an ultrasonic sensor. The objective of the invention is to solve the problem of accurate soil layer classification and naming. High-frequency ultrasonic waves and low-frequency ultrasonic waves are alternately emitted to a soil layer to be detected. After synchronously capturing the two reflected signals, respectively extracting scattering characteristics of the first-diameter particles and penetration characteristics of the second-diameter particles; and fusing the two characteristics to generate a composite particle size distribution curve, and presuming the particle size and grading of the soil layer particles by comparing with a pre-stored soil classification judgment model. The method is implemented through an ultrasonic acquisition device of the engineering geology in-situ test equipment, the ultrasonic emission interval is dynamically adjusted according to the penetration rate of the equipment, and continuous acquisition and real-time measurement of the vertical stratum are achieved until scanning of the whole stratum profile is completed. According to the invention, the technical problems of synchronous accurate detection and in-situ continuous measurement of coarse and fine particles are solved.

The application provides a rock mass slope dumping deformation risk assessment method, system and electronic equipment, and belongs to the technical field of engineering geology and geotechnical engineering, and comprises the following steps: obtaining basic parameters of a rock mass slope to be evaluated, i.e., valley depth H, valley width W, average dip angle alpha of an anti-dumping rock layer constituting a slope main body and a comprehensive parameter representing the overall quality of the rock mass; calculating three core factors, i.e., a geomorphology unloading driving factor Gf, a structure vulnerability factor Sv and a rock mass comprehensive resistance factor Rr; calculating an unloading-dumping coupling coefficient UTI of the rock mass slope: UTI=(Gf*Sv) / Rr; comparing the calculated UTI value with preset risk classification threshold values to determine the dumping deformation risk grade of the rock mass slope to be evaluated. The application establishes a scientific, efficient, objective and quantitative dumping deformation risk rapid assessment method, which can be widely applied to route comparison and selection, disaster census and risk screening in the early stage of engineering construction in the fields of water conservancy and hydropower, transportation and the like.

The utility model relates to the technical field of soil sampling, and discloses a soil sampling mechanism for engineering geology detection, which comprises a base and a drilling head, the top of the base is fixedly connected with an electric sliding rail, the outer wall of the electric sliding rail is provided with a sliding sleeve, the outer wall of the sliding sleeve is fixedly connected with a motor, the output end of the motor is fixedly connected with a fixed seat, and the fixed seat is fixedly connected with the drilling head. A worm is rotatably connected to the interior of the fixing base, a hand wheel is fixedly connected to one end of the worm, a turbine is rotatably connected to the interior of the fixing base, and a wheel disc is fixedly connected to the interior of the turbine. The hand wheel is reversely rotated to drive the clamping block to reset, the clamping block is supported in an auxiliary mode through tension of the first spring, then the clamping block is embedded into the clamping groove to lock the drilling head, the effect of conveniently replacing the drilling head is achieved, and the problem that after an internal hexagonal wrench needs to be used, a clamp is loosened, and then a proper drilling head is installed, the drilling head cannot be replaced is solved. And the tool is matched for screwing, so that the replacement efficiency of the soil sampling mechanism for engineering geological detection is improved.

This invention discloses an intelligent analysis method and system for underground structures based on multi-source geological data fusion, relating to the fields of engineering geology and geotechnical engineering. The method includes: S1, collecting raw geological data and applying a hierarchical clustering algorithm to group scale-scale fractures and interlayer slippage to obtain a preliminary stiffness distribution map of scale-scale rock mass units; S2, based on the preliminary stiffness distribution map of the scale-scale rock mass units, using finite element analysis to simulate the stress transfer path between units and determine the deformation mode and failure path of the scale-scale geological blocks. This intelligent analysis method and system for underground structures based on multi-source geological data fusion can accurately identify stress concentration, uneven settlement, and potential sliding surface locations in key areas such as weak interlayers in dam foundations, reducing judgment bias caused by empirical simplification. It provides more objective, stable, and repeatable analysis results for stability evaluation and risk prediction of underground engineering, and has good engineering applicability and promotional value.

The invention relates to the technical field of industrial big data processing, and discloses a hydrological engineering geological safety analysis method based on hydrological situation changes, which comprises the following steps of: acquiring environmental data in real time through Internet of Things monitoring equipment, ecological monitoring equipment, an unmanned aerial vehicle and a remote sensing technology, extracting environmental characteristic parameters by utilizing a big data analysis technology, and analyzing the environmental characteristic parameters; the method comprises the following steps: establishing a hydrogeology digital twinborn model based on a digital twinborn technology to obtain hydrologic situation information, constructing a safety evaluation model in combination with hydrologic engineering geology safety indexes, performing risk evaluation and early warning according to the hydrologic situation information, adjusting the model by using an Adam optimization algorithm based on a TensorFlow framework, and performing early warning on the hydrologic engineering geology safety indexes. And finally integrating the data to generate a hydrological engineering geological safety analysis report. According to the method, the comprehensiveness and accuracy of data acquisition, the dynamic adaptability of the model and the timeliness and accuracy of safety evaluation are effectively improved, and a sufficient scientific basis is provided for geological safety management of hydrological engineering.

The present application relates to the field of engineering geology and geological disaster prevention technology, in particular to a system and method for evaluating the stability of dangerous rock with steeply inclined fissures in the rear edge, comprising: S1, obtaining high-precision point cloud data of the dangerous rock surface by using unmanned aerial vehicle oblique photography, aerial remote sensing or airborne LiDAR, and constructing a triangular mesh model of the dangerous rock surface; S2, constructing a three-dimensional entity model according to the boundary conditions and sliding surface of the dangerous rock; S3, extracting the volume, barycenter position, sliding surface area and spatial occurrence information of the sliding surface from the three-dimensional entity model, and calculating the self-weight of the dangerous rock by combining the rock mass bulk density and the additional weight of the water in the fissure; the present application constructs a fine three-dimensional scene model of the dangerous rock based on unmanned aerial vehicle oblique photography or LiDAR point cloud, which can accurately extract key geometric parameters such as the volume, barycenter, sliding surface area and inclination of the dangerous rock, avoids the morphological distortion problem caused by two-dimensional simplification, and makes the stability analysis more close to the actual engineering scene.

The application discloses a kind of full stratum shield muck adaptability dynamic modification method, and the application belongs to the field of shield construction technology, comprising: obtaining the stratum hydrological condition of full stratum shield muck, based on stratum hydrological condition, stratum is classified, obtains several stratum classification results;Based on the stratum characteristics corresponding to several stratum classification results, different characteristic parameters are selected as several improvement scheme indexes, based on several improvement scheme indexes, set up several stratum improvement schemes;Set up the improvement scheme index threshold value corresponding to stratum classification result;Obtain the characteristic parameter value of stratum classification result, based on improvement scheme index threshold value, the characteristic parameter value is judged, based on the result of judgment, obtain the optimal stratum improvement scheme.The application avoids the problem that selection standard is not clear in traditional improvement scheme, and the adaptability to complex and changeable engineering geology hydrological condition is poor.

The invention relates to the technical field of engineering geology and rock mass mechanics, and discloses a rock mass fracture trace skeleton extraction and grouping quantification method and system. Comprising the steps of performing denoising and size standardization preprocessing on an excavation face image; using an improved DeepLab V3 + model to carry out semantic segmentation on the fracture trace to obtain a binary image; extracting a single-pixel width skeleton through a refinement algorithm based on the binary image; constructing a two-dimensional grouping strategy containing inclination angle similarity and spatial proximity to cluster skeleton traces; and calculating the length, the inclination angle and the density of the grouping result, and performing statistical analysis. The system comprises an image acquisition and preprocessing module, a crack segmentation module, a skeleton extraction module, a trace grouping module, a quantitative analysis module and the like. According to the scheme, automatic extraction, grouping and quantitative characterization of fracture traces are achieved, and the method is suitable for rock mass structure investigation and engineering analysis.

The application discloses a kind of simulation method of rainfall-induced slope rockfall in the technical field of slope prevention, determine potential slope body to be analyzed, according to engineering geology survey to establish the two-dimensional numerical model of slope body, rockfall and actual rigid protection structure, according to engineering geology survey to determine the material physics and mechanics parameters of slope body, rockfall and actual rigid protection structure, according to meteorological data to summarize the maximum rainfall that can act on slope body and the most dangerous rainfall cycle, then through two-dimensional numerical model based on continuum mechanics using strength reduction method to simulate the limit state of sliding under this maximum rainfall or in the most dangerous rainfall cycle with rockfall slope, and then calculate the safety factor of slope, while through the corresponding simulation slope body, rock layer and simulation rigid protection structure in simulation device are compared and verified.The application is scientific and reasonable, and the simulation accuracy is improved by simulating the potential impact force and impact range of landslide body and rock group interaction through two-dimensional numerical model.

The invention belongs to the technical field of petroleum and natural gas engineering, and particularly relates to a post-fracturing productivity simulation method considering a global fracture closed form under non-uniform laying of a proppant, and the method comprises the steps: S1, building a fracture closed numerical model according to the engineering geological parameters of a target block and the laying form parameters of the proppant in a fracture; s2, crack closing numerical simulation is carried out, the geometric dimensions of a self-supporting area, a supporting area and a dome area after crack closing are quantified, and global crack closing morphological parameters are determined; s3, carrying out a flow conductivity test experiment, determining the flow conductivity of the self-supporting area and the supporting area, and determining the flow conductivity of the dome area based on the cubic law; and S4, substituting the global fracture closed morphological parameters and the flow conductivity of each region of the fracture into the productivity prediction model, and carrying out post-fracturing productivity simulation. According to the method, the non-uniform distribution form of the propping agent in the crack is considered, and the corresponding capacity simulation method of the closed form of the global crack is provided and is more consistent with a propping agent sedimentation mode in actual fracturing.

The application discloses a rock slope multi-mode instability probability analysis and risk evaluation method based on a borehole constraint condition random field, and belongs to the technical field of geotechnical engineering and engineering geology.The application realizes reasonable expression of spatial heterogeneity of rock mass mechanical parameters by constructing a conditional random field which is strictly consistent with measured data under limited borehole survey data conditions, greatly improves the authenticity of a numerical model and the reliability of analysis results, and effectively overcomes the defects of insufficient result reliability caused by lack of measured constraints in unconditional random fields; the application can identify various instability modes of a rock slope under different parameter space distribution conditions through a large number of multi-sample numerical simulation, quantitatively calculates the occurrence probability of various instability modes, can comprehensively grasp various risks possibly existing in the rock slope, and improves the accuracy and engineering applicability of the rock slope stability analysis and risk evaluation, instead of only focusing on a single most dangerous case.

The invention relates to the technical field of rock mechanics and engineering geology numerical analysis, in particular to a dynamic relaxation quasi-static crack path tracking method and system.The method comprises the steps that geometric information, boundary and loading information, material parameters, initial defect information and observation data are obtained, a finite element model is constructed, and a damage field is initialized; applying a load to each external load increment, and solving a balance displacement field and a current damage field by adopting dynamic relaxation to obtain a crack propagation driving force field and an energy balance amount; a crack zone is obtained based on persistent coherence, a crack tip front edge is extracted, a candidate crack propagation increment set is generated, submission increments are determined through factor graph inference and dynamic relaxation prediction, and a damage field is updated; according to the energy balance amount and the convergence state back-off increment, numerical control parameters are updated, and material parameters are updated in combination with ensemble Kalman filter assimilation. According to the invention, stable tracking of the crack path is realized and prediction consistency is improved.

The invention relates to the technical field of survey, in particular to an engineering geological survey holographic surveying and mapping method and system, and the method comprises the steps: determining a missing region and an adjacent current focus region through the point cloud data of an engineering geological region; determining the filling contribution degree of the current focus area by using the adjacent edge length between the current focus area and the missing area; determining a filling range by using the length of the adjacent edge, and further filling the missing region to obtain an updated focus region; taking the updated focus area as the current focus area for iterative filling to obtain the change trend of the filling contribution degree; determining the filling integrity of the current focus area by using the change trend; and performing height separation on each current focus region of the filled region by utilizing the respective iteration filling times of the current focus region and the missing region to obtain holographic output. Through the technical scheme of the invention, the whole filled area is closer to the real geological condition, and a more complete and real display result is obtained during holographic display.

The invention discloses a coast rock landslide slip zone wave load fatigue failure simulation test device and method in the technical field of ocean engineering geology, the coast rock landslide slip zone wave load fatigue failure simulation test device comprises a bearing table and a computer, a model box is arranged at the top of the bearing table, and a wave control system is arranged on the left side in the model box; a landslide model system and a data acquisition system are arranged on the inner right side of the model box, and the wave control system and the data acquisition system are connected with a computer. According to the invention, a simulation test is carried out by controlling conditions and parameters such as wave parameters, a landslide slope angle, landslide dead weight, a slip band angle, slip band roughness, slip band filling material types and the like, and relative vertical and horizontal displacement and stress conditions of a slip band are monitored in real time; the deformation failure process rule and stress strain parameters of the landslide slip zone under the continuous wave load effect are obtained, and then theoretical and technical support is provided for stability evaluation, prediction and prevention and control engineering design of coast rock landslide.

The invention provides a complex geological area arch dam foundation rock mass engineering geology comprehensive evaluation and classification method, which comprises the following steps: carrying out multi-dimensional exploration investigation on a dam site rock mass structure to obtain a rock mass structural surface and rock mass structure division data; an existing structural surface grading standard serves as a preliminary grading reference standard, and a structural surface grading scheme in the dam site area under the complex geological condition is formed in combination with a dam site rock mass structural surface and rock mass structure division data; and evaluating and classifying the rock mass exposed by each adit in each exploration line to obtain the quality of the engineering geological rock mass. According to the method, rock mass structural plane information and rock mass structural data are obtained from multiple dimensions, a structural plane grading scheme in a complex geological area is formed in combination with an existing structural plane grading standard, and dam foundation rock mass engineering geology is analyzed and evaluated according to the scheme, so that geological condition support is provided for construction of a dam foundation infrastructure plane.

The invention discloses a mutual feedback evolution method and system for excavation face instability and adjacent building and structure deformation, and the method comprises the steps: constructing a multi-dimensional monitoring system covering an excavation operation area-adjacent building and structure-surrounding medium according to underground engineering geological conditions, building and structure distribution and surrounding environment, the frequency is dynamically adapted according to construction conditions and risk levels, and real-time transmission or encryption acquisition is performed in a core area; the method comprises the following steps: performing standardized preprocessing on monitored heterogenous data, extracting associated characteristic parameters of excavation face instability and building deformation, constructing a dynamically updated characteristic parameter database, and determining a time sequence change rule and statistical characteristics of each parameter; according to the method, multi-source parameters are combined, engineering mechanics and data driving composite modeling is adopted, geological, structural and environmental parameters are introduced as correction factors, a mutual feedback evolution model is constructed, the action characteristics of the two parameters are quantified, real-time parameters are input to deduce a bidirectional mechanism, and a co-evolution trend is pre-judged. And the construction safety and controllability are improved.

The invention provides an unsaturated sandy soil-shaped two-long granite slope stability analysis method, and relates to the technical field of unsaturated soil mechanics and engineering geology, and the method comprises the following steps: correcting a BC water retention function model through a first correction parameter, and constructing to obtain an unsaturated sandy soil water retention function model; correcting the BC permeability coefficient model according to the second correction parameter, and constructing to obtain an unsaturated sand permeability coefficient model; and analyzing the stability of the two-long granite slope by combining the unsaturated sand water holding function model and the unsaturated sand permeability coefficient model to obtain a stability analysis result. According to the method, the traditional BC water holding function and permeability coefficient model is improved by using the first correction parameter and the second correction parameter, and the residual value is used for replacing a film flow parameter which is difficult to predict in the previous model, so that the suction range is expanded, and the unsaturated slope formation mechanism is analyzed.