106 results about "Slope ratio" patented technology

The present invention discloses a method for dynamically assessing slope safety, and the method comprises the following steps: S1, carrying out geologic model generalization to the slope according to slope type, surface elevation, slope structure, stratum characteristics and a deformation failure mode to obtain a slope geologic model, creating a slope geometric model according to the said slope geologic model, carrying out the subdivision of computational grid, and selecting a reasonable numerical simulation method, mechanical constitutive and initial boundary value conditions to form a computational model; and S2, adjusting stratum parameters, structural plane parameters and activating factor strength based on the said computational model, carrying out a large amount of numerical simulation, summarizing results of the said numerical simulation, normalizing input quantities and output quantities to establish machine learning samples.

A method for constructing a digital twin monitoring model for slopes based on a proxy model includes S101-S104. S101, a slope geometric model consisting of M triangular facets is constructed. S102, a first training dataset is constructed for pretraining a pre-proxy model by using the slope geometric model. S103, monitoring data of the M triangular facets are collected in real-time to construct a second training dataset for training the proxy model. S104, a warning cloud map of the slopes is generated. The method uses the slope geometric model to obtain simulation data under multiple physical field conditions. It constructs training dataset of pretraining pre-proxy model based on the simulation data, which greatly reduces training samples. Moreover, the multiple base learners in the proxy model can reduce the computational bias of a single time-series analysis model, improving the prediction accuracy of the proxy model.

The invention discloses a high and steep slope rock mass stability intelligent monitoring system and monitoring method, and relates to the technical field of intelligent monitoring, and the method comprises the steps: 1, collecting images, vibration and inclinometer data in real time, and carrying out comprehensive analysis to generate a landslide coefficient; 2, if the coefficient exceeds a threshold value, triggering a first-level alarm, otherwise, entering trend analysis; and step 3, judging the trend speed through the ratio of the low frequency to the high frequency of the vibration signal and the time slope, triggering secondary early warning when the trend speed exceeds a threshold value, or else, circularly monitoring. Vector conversion and included angle cosine are matched with a landslide direction threshold value, effective deformation is quantified by combining bending radius and stress analysis, multidirectional bending interference of an inclinometer is eliminated, displacement direction measurement precision is improved, early warning errors are reduced, a trend variable is constructed by utilizing a ratio of low-frequency amplitude to high-frequency amplitude, trend speed is analyzed by combining time sequence slope, and the method has the advantages of being high in accuracy and high in accuracy. The rock body loosening sign is comprehensively pre-judged, early warning is achieved, and the sudden landslide risk is reduced.

The invention relates to the technical field of slope monitoring, and discloses a slope stability probability assessment method and device, and the method comprises the steps: carrying out the sensitivity analysis processing of the rock and soil parameters of a slope, and obtaining m sensitive relation curves; slope change mean values corresponding to the m sensitive relation curves are calculated and sorted, and k random rock-soil body parameters are determined; constructing n groups of samples containing k random rock-soil body parameters; performing finite element simulation on the n groups of samples to obtain n slope stability coefficient simulation results; analyzing the sample group proportion frequencies corresponding to the stable and unstable states of the slope; and calculating the slope stability level failure probability and reliability corresponding to the sample group by adopting a Monte Carlo method. According to the method, the random finite element probability evaluation method is adopted, the physical and mechanical parameters of the rock-soil body are regarded as random variables, the stability state of the slope under different random parameter combinations is analyzed through finite element numerical simulation, the actual stability condition of the slope can be reflected more truly, and the evaluation accuracy is improved.

The invention relates to the field of slope prevention and control of water conservancy and hydropower engineering, in particular to a method for treating abnormal deformation of an upper-hard and lower-soft extra-high steep transverse slope during a construction period, which comprises the following steps of: constructing a three-dimensional geologic model based on multi-source data, and calibrating mechanical parameters of a rock mass and a structural surface in a manner of combining inversion analysis and field monitoring data; the synergistic effect of different supporting measures is quantified through numerical simulation, and a system treatment scheme is formed. Specific treatment is carried out according to the special failure mechanism of the composite structure with the hard upper portion and the soft lower portion, the progressive extrusion deformation characteristics of the lower soft rock are accurately recognized, the treatment strategy of deep anchoring, soft rock reinforcement and form regulation and control is adopted, anchor cables are adopted for deep reinforcement, consolidation grouting is applied for improving the mechanical property of the soft rock, and form control measures of slope ratio optimization are matched, so that the composite structure is obtained. And a multi-dimensional deformation suppression system is formed. The technical problems that in the existing abnormal deformation treatment process, supporting measures are not appropriate, a supporting scheme is lack of systematicness, and the treatment effect is poor can be solved.

The invention discloses a granite residual soil slope section structure optimization method which is applied to the technical field of slope prevention and control. Comprising the steps that S1, geological drilling is conducted on a slope to be excavated, hydrogeological conditions are investigated to obtain relevant data of the slope, and the relevant data comprise stratum lithology, a slope body structure, an underground water level and a rainfall condition; s2, measuring physical and mechanical properties of stratum lithology according to the obtained side slope geological drilling core sample; s3, according to the height of the side slope, the stratum lithology, the land use red line and the surrounding environment, design parameters of the side slope stages, the slope ratio of each stage of the side slope, the height of each stage of the side slope and the platform width of the side slope to be excavated under different working conditions are designed; s4, obtaining slope stability coefficients corresponding to different working conditions based on S2 and S3, and obtaining an optimal section structure design working condition; s5, performing protection and retaining design on the slope to be excavated according to the principles of technology feasibility, economy, reasonability and ecological environmental protection on the basis of the step S4, obtaining a slope stability coefficient, and obtaining a protected slope section structure; and S6, on the basis of the S5, in combination with hydrogeology and meteorology, drainage design of the slope to be excavated is carried out, and finally an optimized slope section structure is obtained. According to the method, the long-term stability of the slope can be improved, better environmental adaptability and ecological friendliness are provided, engineering protection measures are reduced, and the construction and maintenance cost is reduced.

The invention discloses a deep foundation bearing capacity characteristic value calculation method and system based on data fusion. The method comprises the steps that data collection is completed through a deep load test, and a load settlement curve and a settlement time logarithmic curve are formed; generating a smooth curve; identifying a slope mutation point of the curve by adopting a first-order derivative mutation method, wherein a load corresponding to the mutation point is a proportional limit load; if the slope abrupt change point is not recognized, the curve is set as a slowly changing curve; extracting the slope and the slope change rate of the curve under each level of load, and completing the judgment and correction of the limit load by fusing the multi-dimensional data of the two curves and combining preset thresholds including the settlement amount and the settlement stabilization time; and further calculating the bearing capacity characteristic value of the deep foundation by combining the numerical relationship between the ultimate load and the proportional limit load.

The invention relates to the technical field of artificial intelligence, in particular to a concrete faced rockfill dam profile intelligent design method based on data feature fusion, and the method comprises the steps: building a learning prediction model to predict the height and slope ratio of a dam body through collecting initial data and historical data such as feature water levels, anti-seismic attributes, stone parameters and the like; dam body contour parameters are calculated, and the area proportion of each partition is predicted; thirdly, the dam body contour parameters, the feature water level, the anti-seismic attribute and the partition area proportion are fused into a multi-dimensional feature vector, the multi-dimensional feature vector is input into the generative adversarial network model, and a partition design image of the concrete faced rockfill dam is generated. According to the method, intelligent design of the concrete faced rockfill dam profile scheme is achieved, the design efficiency is greatly improved, and the intelligent level of concrete faced rockfill dam design in China is further improved.

Structured surfaces are described. In one embodiment, the structured surface comprises a plurality of structures having complement cumulative slope magnitude distribution (Fcc) such that at least 30, 40, 50, 60, 70, 80 or 90% of structures have a slope greater than 10 degrees; and less than 80% of the structures have a slope greater than 35 degrees. In other embodiments, the structures comprise peaks and valleys defined by a Cartesian coordinate system such that the peaks and valleys have a width and length in the x-y plane and a height in the z-direction and at least a portion of the peaks and / or valleys vary in height in the y direction and / or the x-direction by at least 10% of the average height. Articles and methods are also described.

The invention discloses a slope instability mechanism analysis method and equipment, and the method comprises the steps: carrying out the investigation of a to-be-researched slope, and determining the geological environment characteristics of the slope and the disaster damage type of the slope; the physical and mechanical properties of the slope soil body are studied; establishing a slope calculation model, and simulating the influence of different slope heights and slope ratios on the slope stability in an initial state by combining finite element numerical calculation with the slope calculation model and physical and mechanical property data of a slope soil body; external influence factors causing slope instability are analyzed, and the stability and instability mechanism of the slope under different external influence factors are simulated and analyzed through finite element numerical calculation in combination with the slope calculation model and the physical and mechanical property data of the slope soil body. According to the method, the internal logic relation and the synergistic effect of internal factors and external factors are fully considered, the internal law of slope rock mass instability failure is determined, accurate prediction and evaluation are made for slope instability analysis, and a basis is provided for subsequent establishment of a corresponding slope safety estimation method.

To provide a method for estimating a landslide surface shape which is excellent in speed and easiness and satisfies a certain level of accuracy on the basis of displacement measured value of a topography before landslide and a topography after landslide.SOLUTION: A movement vector at an observation point is calculated from displacement measured value, grouping is performed on the basis of inclination of the movement vector, a representative movement vector every group is obtained, division by a division line in a vertical direction is performed at a starting point of the group, a virtual line connecting the starting point of the group and a landslide terminal part end point 11 at an incline of the representative movement vector in the same group is drawn up to an intersection with a division line of the next group, a virtual line connecting an intersection of the next group and the landslide terminal part end point 11 at an incline of the representative movement vector of the next group is successively drawn up to an intersection with a division line of the next group, and is drawn from a starting point 10 of a landslide head to the end point 11 of the landslide terminal every group in a descending order.SELECTED DRAWING: Figure 6

The invention provides a calculation method for the optimal excavation slope ratio of a groove foundation pit. The calculation method comprises the steps that physical and mechanical parameters and geometric parameters of the groove foundation pit to be analyzed and the stress state of a sliding body of the groove foundation pit are obtained; establishing a safety stability objective function and an excavation volume objective function of the trench foundation pit, and a slip mass limit equilibrium constraint condition of the trench foundation pit; establishing a multi-objective optimization nonlinear mathematical programming model of the safety and stability of the trench foundation pit and the excavation workload; and solving the multi-objective optimization nonlinear mathematical programming model to obtain a safety stability coefficient and an optimal excavation slope rate when the excavation workload is minimum under the condition of guaranteeing safety. According to the method, an effective calculation method can be provided for the optimal slope ratio of slope excavation of the soil trench foundation pit, and the trench foundation pit slip mass limit equilibrium condition can be combined with the actual workload, so that the actual requirements of foundation pit engineering can be better met, the workload is as small as possible while the safety is ensured, and the construction efficiency is improved. And an effective basis is provided for stability evaluation and actual design construction of the trench foundation pit.

The utility model discloses a slope ratio measuring scale for road slope construction and acceptance, and relates to a slope ratio measuring scale for road subgrade slope construction and acceptance. The angle measuring scale is mainly designed for solving the problem that a common angle measuring scale is inconvenient to determine the slope ratio during slope construction at present. The ruler comprises a horizontal ruler arm and a rotating ruler arm, wherein the front end of the horizontal ruler arm is connected with the front end of the rotating ruler arm through a rotating shaft; the upper surface of the horizontal ruler arm is provided with a horizontal bubble, the rotating shaft is provided with a dial, and the lower half part of the dial is provided with slope ratio scales; the rotating ruler arm is provided with a triangular arrow; protractor scales are arranged at the lower half part of the dial, an elastic rope sleeve is sleeved on the horizontal ruler arm, and the lower end of an elastic rope connected with the elastic rope sleeve is connected with a sharp hammer ball. Red laser emitting lamps irradiating in the extension line direction of the center line of the ruler arms are fixed to the ends, away from the rotating shaft, of the horizontal ruler arm and the rotating ruler arm, and the axis positions of the left side face and the right side face of the rotating shaft are each provided with one red laser emitting lamp. The device has the advantage that the real-time excavation or filling state slope ratio can be conveniently and quickly measured.

The utility model discloses a device for measuring the slope ratio and angle of a side slope, a sliding marking plate is clamped in an L-shaped support main body in a sliding manner, the end part of the sliding marking plate is fixedly connected with a mounting arc groove end plate, a fixing screw is clamped at one corner of the top surface of the L-shaped support main body through a thread, and the other corner of the top surface of the L-shaped support main body is fixedly connected with the mounting arc groove end plate. An adjusting long rod is installed in the middle of the top end of the installation arc groove end plate in a penetrating mode, and the inclination angle of the laser generator is displayed through the marking arc-shaped plate. The numerical value pointed by the laser generator displayed on the arc-shaped marking plate is the angle and the slope ratio of the slope, so that the measurement of the slope is completed, the convenience of the slope measurement process of the measurement device is effectively improved, the laser generated by the laser generator can also be used as a reference in the slope trimming process, the function of the measurement device is further expanded, and the measurement efficiency is improved. And the use convenience of the measuring device is improved.

The invention provides a slope extraction method and device based on geologic horizon guidance, and belongs to the technical field of geophysical exploration, and the method comprises the steps: obtaining three-dimensional seismic data; and extracting the slope of the nth horizon, the slope of the (n-1) th horizon and the slope between the (n-1) th horizon and the nth horizon by using the three-dimensional seismic data. The device comprises a data acquisition module and a slope extraction module. According to the method, the accuracy of slope extraction is improved, and a reliable data basis is provided for subsequent seismic data processing or seismic data interpretation.

The invention provides a site classification method and system based on a regional gradient-Vs30 mapping model, electronic equipment and a storage medium, and relates to the technical field of seismic engineering and site classification.The method comprises the steps that a grid where a drilling point in a to-be-measured area is located is used as a center pixel, a nine-square window is constructed, and a Vs30 mapping model is constructed; and calculating elevation change rates of the central pixel and the adjacent pixels in x and y directions based on the digital elevation data, and further obtaining a terrain slope value through a slope formula. A slope value is converted into a soil layer shear wave velocity predicted value by utilizing a pre-constructed regional gradient-Vs30 mapping model, and the model is optimized through local drilling data, so that the regional applicability is improved. And finally, according to the mapping relationship between the interval and the site category, classifying the predicted values and generating a site classification spatial distribution diagram. According to the method, the site classification precision and the engineering applicability are improved.

The formation turning point marking method and device provided by the present invention convert the seismic profile into a correspondence curve between the well trajectory length and the layer depth with obvious characteristics. The slope of each point can be statistically calculated by computer software through the correspondence curve, and then a formation dip angle change threshold is preset to determine whether it is a turning point. The entire calculation and processing process is clear and does not require manual subjective marking, thus saving manpower and material resources. At the same time, the formation dip angle change threshold provides a unified standard for measuring turning points, making the marking of turning points more accurate.

The utility model belongs to the field of roadbed slope construction, and particularly relates to a device for quickly detecting a slope ratio, which comprises a pipe sleeve provided with a through hole along the length direction of the pipe sleeve; the vertical rod is arranged in the through hole in a penetrating mode, the first end of the vertical rod is positioned in the pipe sleeve through a first locking piece, and the second end of the vertical rod is rotationally connected with a first magnetic attraction block; the transverse rod is vertically fixed to the side wall of the pipe sleeve, and the end, away from the pipe sleeve, of the transverse rod is rotationally connected with a second magnetic attraction block; the first magnetic attraction block and the second magnetic attraction block are attracted to the inclined rod, so that a right triangle structure is formed among the vertical rod, the cross rod and the inclined rod; the right triangle formed by the cross rod, the vertical rod and the inclined rod is used for calibrating the slope ratio of a site, the vertical rod is adjusted to different lengths, so that the right triangle has different shapes, and the device can be used for side slopes with various slope ratios and is high in practicability.

The present invention relates to a method and system for precise excavation control of a complex section of a cutter suction dredger. The method first constructs a design section based on geological survey data or construction plan parameters, and collects data of high-precision positioning equipment and related sensors in real time, including ship positioning longitude and latitude coordinates, bridge angle, trunnion draft, tide level, compass direction, trolley travel, and transverse winch cable speed, and calculates the auger excavation depth, auger coordinates, auger lifting and lowering speed, and auger transverse speed in combination with ship type parameters; then, the slope ratio, sideline coordinates, and design depth of the current design section are obtained through the auger coordinates, and the deviation between the auger position and the design section is calculated in real time. Finally, in the set excavation mode, the motion parameters of the auger are automatically adjusted through the system built-in control model to ensure that the auger excavation trajectory accurately follows the design section. The present invention achieves efficient, accurate, and uniform excavation effects, and can significantly improve the construction accuracy and efficiency of complex section excavation.

The invention relates to the technical field of geological engineering, in particular to a dangerous rock mass stability evaluation result verification method based on historical data comparison, which comprises the following steps: acquiring dangerous rock mass frequency and mechanical monitoring data, dividing stable and critical working conditions, constructing a steady state and critical state offset difference surface and an energy gravity center coupling difference surface, and verifying a dangerous rock mass stability evaluation result. And the seismic oscillation triggering frequency and the instability frequency are analyzed to form load triggering comparison information, the fracture expansion rate and the displacement variation are calculated, the stage state is quantified, and stage joint verification data are output. Through frequency slope identification, mechanical parameter offset description, frequency domain energy and gravity center direction coupling, load triggering and instability proportion offset, and crack and displacement joint quantification, continuous determination of a stage state is realized, critical signal identification sensitivity is improved, multi-source evidence consistency is enhanced, objectivity and reverifiability of result verification are optimized, and the method is suitable for popularization and application. Empirical dependence is reduced, and stability evaluation and observation response are in close correspondence.

The application relates to the technical field of building model construction, in particular to a building BIM model construction method fusing GIS terrain and site information, which solves the technical problems of great design result safety hidden dangers and poor specification compliance in the process of complex geological condition slope modeling caused by the fixed slope ratio static modeling method in the prior art. The method comprises the following steps: discretizing a continuous three-dimensional space of a to-be-constructed slope into a two-dimensional grid matrix, and giving each grid node in the two-dimensional grid matrix with a rock layer inclination attribute and a cost attribute; in the two-dimensional grid matrix, taking a digging starting point as a search starting point, and determining an optimal path from the digging starting point to a surface boundary through an extended state space search algorithm; and generating an excavation contour line of a target section according to the optimal path.

The present invention discloses a method for determining the slope reduction rate range of the inlet of the lower horizontal tunnel of a swirling vertical shaft based on numerical simulation, belonging to the technical field of hydrodynamic mathematical simulation for urban flood control and drainage. First, an index representing the magnitude of slope reduction is proposed: the slope reduction rate. Since the reasonable value range of the unknown slope reduction rate is not known, different slope reduction rates can be set, and the reservoir water level H and the outlet velocity v of the slope reduction at each operating condition are extracted. Then, the relationship curves of water level ~ slope reduction rate and energy dissipation rate ~ slope reduction rate are established. By referring to the curve charts, the reasonable slope reduction rate range is determined. Finally, slope reduction rate values within the range are randomly selected for simulation calculation, and the calculation results are compared with the results obtained from chart query to verify the feasibility of the reasonable slope reduction rate range. The present invention can not only stabilize the flow pattern of water with a large discharge slope ratio and high velocity flowing through the lower horizontal tunnel, but also ensure smooth ventilation at the top of the lower horizontal tunnel, avoiding the "blocked tunnel" of mountain floods.

The invention discloses an unmanned aerial vehicle image-based slope erosion monitoring method, which comprises the following steps of: acquiring a multi-angle image sequence through an unmanned aerial vehicle, extracting initial slope contour data, obtaining a slope ratio initial estimation value to correct a slope model, obtaining a model after deformation correction, and extracting a crack distribution coordinate set; carrying out matching calculation on the crack distribution coordinate set and the gradient ratio, analyzing deviation and updating projection parameters; rebuilding a three-dimensional slope model by using the updated projection parameters, extracting slope length ratio and slope direction ratio parameters, generating an erosion distribution layer graph, and obtaining a synchronous matching result of the crack and the ratio; and according to the ratio deviation distribution of the synchronous matching result and the initial image sequence, carrying out loop iteration adjustment projection until the deviation is lower than a threshold value, judging the final matching consistency, and outputting complete eroded part positioning data. According to the method, accurate positioning of the erosion part and accurate quantification of slope features are realized, and powerful support is provided for geological disaster assessment and prevention and control under complex terrains.

The utility model relates to the technical field of side slope ratio measurement, and discloses a side slope ratio measuring device which comprises a measuring rod, a protractor and a pointing needle, the measuring rod comprises a main rod and an auxiliary rod, one end of the main rod is provided with a limiting bolt, the main rod is rotatably connected with the auxiliary rod through the limiting bolt, and the protractor is connected with the pointing needle. A fixing mechanism is arranged on one side of the main rod and used for fixing the relative angle between the main rod and the auxiliary rod, the protractor is fixedly connected to the middle of the main rod and arranged in the length direction of the main rod, and a screw set is arranged in the center of the protractor and used for fixing the protractor. Through the cooperative arrangement of the main rod, the protractor and the pointing needle, after the main rod is placed on the ground with the gradient, the pointing needle is perpendicular to the ground under the action of gravity, the gradient of the current ground can be obtained by checking the indication reading of the pointing needle on the protractor, the time required for measurement is shortened, and the construction efficiency is improved.

This invention discloses a method for slope finding at roof drain outlets, comprising: (1) roof waterproofing layer construction and placement of isolation layer; (2) selection of slope finding tool with appropriate cross-section; (3) determination of the height of slope change point; (4) installation of steel mesh; (5) fabrication and installation of slope finding tool; (6) setting of internal insert and completion of elevation; (7) construction of steep slope surface and gentle slope surface inside and outside the slope finding tool respectively. This invention also discloses a slope finding tool for the above-mentioned slope finding method. In this technical solution, the slope finding tool is set up and used as a pouring template during construction, which solves the problem of waiting for initial setting before fine finishing when different slope ratios are formed during slope finding, and also avoids problems such as concrete flowing and not fixing due to different slope ratios, realizing one-time pouring and simultaneous finishing, and slope surfaces with different slope ratios can be formed inside and outside the slope finding tool respectively, thereby improving construction efficiency.

The invention discloses a method for inverting a high-speed layer of an extremely thick low-speed-reduction zone based on gun first arrival, which comprises the following steps of: 1, in an experimental area with a relatively large burial depth of the high-speed layer, exciting by adopting a point above the top surface of the high-speed layer to obtain a single-shot record of the point, and picking up a first arrival wave by a manual assistance method; 2, the curve slope is obtained from the single shot record, v0, v1 and v2 are further obtained, v0 corresponds to the propagation speed of the excitation point in the low speed reduction zone, v1 corresponds to the reflected wave speed when the seismic wave is propagated in the low speed reduction zone, and v2 corresponds to the reflected wave speed when the seismic wave is propagated downwards to a high-speed layer; 3, drawing a time distance curve graph; and 4, uniformly taking points, calculating numerical values point by point, drawing a corresponding high-speed layer velocity diagram and a high-speed layer burial depth diagram, and completing surface structure investigation work. According to the method, the speed and burial depth values of the high-speed layer of the extremely-thick low-speed-reduction belt can be successfully solved, and the blank of surface layer survey results that a conventional surface layer survey method cannot control the high-speed layer area is filled.

The invention discloses a CAD terrain gradient analysis and daily standard wind speed increase coefficient calculation method. The method comprises the steps that all vertexes of a target broken line in a contour line section CAD graph are extracted; according to the slope of a connecting line between two adjacent vertexes, extracting a transition line segment with a changed slope; calculating the height difference of the i-th transition line segment and the included angle between the i-th transition line segment and the vertical auxiliary line; calculating a first coefficient, a second coefficient and a third coefficient; and calculating a daily standard wind speed increase coefficient corresponding to the i-th transition line segment according to the sum. The method solves the problems that in CAD topographic map design, when line segments with changed gradients in broken lines of a contour profile map are manually extracted, batch processing of the broken lines is needed, time is wasted, and efficiency is low; meanwhile, the prior art lacks the function of automatically calculating the wind speed increase coefficient under the daily standard specification.

This invention discloses a method and apparatus for simulating the uplift process of ancient uplifts based on discrete element method (DEM) calculations. The method includes: determining the maximum slope of the fitted curve equation based on the upper boundary of the ancient uplift, thereby determining the initial overlap ratio of the particles; filling a rectangular box model of a second specified size with particles of a first specified size, ensuring the bottom particles have an initial overlap ratio, to obtain a first DEM model; determining the microscopic parameters of the granular materials of each stratum simulated using the first DEM model through biaxial compression experiments; setting the parameters of the first DEM model using the microscopic parameters of the granular materials and strata information to obtain a second DEM model; calculating the uplift vertical velocity of each particle at the bottom of the model based on the vertical velocity of the specified particles and the maximum value of the fitted curve; and simulating the uplift process of each particle at the upper boundary of the ancient uplift according to its uplift vertical velocity. This invention can simulate the uplift process of ancient uplifts with different geometric shapes.

Techniques for determining properties of a rock sample include performing a plurality of series of permeability measurements of a rock sample with a permeability test assembly to derive permeability values, where each series includes permeability measurements of the rock sample at a respective, constant differential pressure between a particular confining pressure and a particular pore pressure; for each series of the plurality of series, performing a curve fit operation to determine a slope and an intercept of a curve associated with a selected Biot coefficient, the permeability values, and the particular pore pressures to generate a plurality of slope values and a plurality of intercept values; determining an effective stress coefficient of the rock sample; and determining an actual Biot coefficient of the rock sample.

The application provides a landslide early warning method and system, comprising: obtaining inclination monitoring data collected by an inclination sensor in a landslide body and preprocessing the inclination monitoring data; obtaining a time sequence and an inclination sequence corresponding to the time sequence; constructing an inclination and time fitting function according to the time sequence and the inclination sequence; calculating a tilt rate data sequence by derivation of the inclination and time fitting function; calculating a slope of the tilt rate data sequence; and calculating a tangent angle and determining a landslide early warning level according to the slope of the tilt rate data sequence. The application can solve the problem of low identification sensitivity of the existing landslide early warning method and system in the initial stage of slope body deformation.