78 results about "Slope ratio" patented technology

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 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 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.

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 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 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 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 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.

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.

The utility model belongs to the technical field of slope ratio determination, and provides a water conservancy slope ratio determinator which comprises a main body groove used for participating in measurement of the horizontal width of a slope and containing and fixing other components of the determinator. The transverse measuring piece is installed in the main body groove and matched with the main body groove to measure the horizontal width of the side slope, and the transverse measuring piece comprises an auxiliary groove installed in the main body groove in a sliding mode; and the longitudinal measuring piece is arranged in the auxiliary groove and is used for measuring the vertical height of the side slope. According to the utility model, through the cooperation of the main body groove, the transverse measuring member and the longitudinal measuring member, the measurement of the horizontal width and the vertical height of the side slope can be completed without contacting the side slope surface, and the non-contact measurement method avoids the direct contact error caused by the unevenness of the side slope and the existence of obstacles such as stones or vegetation. Therefore, the tester can easily adapt to various complex terrains, including the conditions of uneven slope surface, stone or vegetation coverage and the like. And the flexibility and the practicability of measurement are improved.

The invention relates to an urban construction land climbing multi-dimensional identification and classification system based on dynamic and static coupling in the technical field of smart city and territorial space intelligent treatment, and the system comprises a static index calculation module which calculates the slope rate of urban construction land based on DEM data by taking 4.57 degrees as a threshold value, and divides the slope rate into three static background types of high, medium and low; the dynamic index calculation module is used for calculating an average construction land climbing index and an upper limit gradient change value on the basis of multi-stage land utilization data, and dividing the average construction land climbing index and the upper limit gradient change value into three dynamic trend types of high dynamic climbing, low dynamic climbing and horizontal expansion; the comprehensive classification decision module is embedded with a double-index cross classification matrix, combines three static background types and three dynamic trend types, and finally outputs nine comprehensive climbing types; and the result output module is used for generating a city planning suggestion structured report. And full-chain intelligent analysis is realized by coupling the static slope rate and the dynamic climbing index, and an accurate decision basis is provided for territorial space planning.

The present invention discloses a method for discriminating formation fluid properties by using a morphological function of a gas logging curve, and relates to the technical field of geological evaluation while drilling. In this scheme, gas logging data is functionalized with respect to well depth, and a main trend calculation formula of the function is established through standardization processing, trend analysis, and extreme value transformation, and a trend slope ratio is calculated. The difference in trend slope ratios of gas logging curves corresponding to sandstone reservoirs containing different fluids is used to establish a discrimination standard and form a discrimination method, which is then used to discriminate formation fluid properties of sandstone reservoirs in new wells while drilling. This method effectively solves the problem of difficulty in discriminating fluid properties while drilling in low-pressure, high-bound water, and thin-layer sandstone reservoirs in the Sulige area. The conformity rate of formation fluid property discrimination while drilling using this method reaches 89.3%, which significantly exceeds the conformity rate of existing discrimination methods such as the plate method, and the discrimination results are more reliable.

The invention relates to the technical field of mountainous area wind field simulation, and discloses a terrain edge transition section combination type selection method, device and equipment and a storage medium, and the method comprises the steps: building a straight line outwards in the radial direction of the terrain based on the maximum terrain clearance of the mountainous area terrain edge, and employing curves of different virtual inclination angles to adapt to the terrain features to obtain a geometric model of the transition section combination; performing two-dimensional CFD flow field numerical simulation on the geometric model to obtain characteristic index data for quantifying the influence of the transition section on the airflow; and evaluating transition section combinations of different virtual inclination angles and straight line lengths based on the characteristic index data to obtain an optimal transition section combination. According to the method, the problems that in existing wind tunnel tests and numerical simulation, virtual clifts generated by mountain terrain cutting cause incoming airflow separation and lifting, additional wind speed and turbulivity of a fixed inclination angle inclined plate storage tail end slope nonzero are solved, the slope of a traditional contraction curve is only zero, the incoming flow quality is not high, and the measurement accuracy is high are solved. And the mountain area wind resource evaluation precision is influenced.

This invention relates to the field of intelligent prediction technology, and discloses a method and system for predicting the effect of roadbed solidification based on deep learning. The method includes evaluating the matching degree between the soil and the solidifying agent and generating a score. If qualified, a preliminary strength trend curve is constructed based on the material ratio and ambient temperature, and its baseline slope is determined. Subsequently, the slope is analyzed in conjunction with environmental geological parameters to identify nonlinear critical nodes and potential inflection intervals in the solidification process. For this interval, the soil moisture content and ambient temperature are extracted, and the preliminary trend curve is dynamically coupled and corrected to generate an optimized strength growth model. The model is used to calculate simulated predicted values, and the deviation from the actual values ​​is used to determine iterative correction parameters, thereby optimizing and generating a corrected strength distribution map. This map is compared with a safety threshold to complete the solidification effect evaluation. Finally, an optimized ratio scheme is generated based on the evaluation conclusions. This method can improve the accuracy of predicting the inflection point of solidification strength.

According to the nonlinear strength criterion of the rock-soil body, the stress condition when the strength of the rock-soil body is damaged meets the formula: q / 2 = a (p / 2) 2 + b (p / 2) + C0, the principal stress sigma1 when the rock-soil body is damaged under different surrounding rocks sigma3 is obtained through a conventional triaxial shear test of the rock-soil body, and the specific numerical values of parameters a, b and C0 are solved through quadratic regression analysis between q / 2 and P / 2. C0 can also be measured through a tensile strength test, so that a rock-soil body strength criterion formula is obtained; the strength criterion is derived on the basis that the rock-soil body begins to crack from the maximum shear stress surface, the influence of the initial cohesion and the maximum shear surface pressure stress on the cohesion is considered, the uncertainty of determining parameters by drawing a Mohr circle tangent in the traditional Mohr-Coulomb criterion is avoided, the fitting precision of test data is improved, and the test efficiency is improved. And meanwhile, the calculation accuracy in practical application is improved, and the solved tangent slope is less than or equal to 1.0, which accords with the definition of physics on the friction coefficient.

The invention relates to a foundation pit excavation auxiliary measuring device, in particular to a pipeline foundation pit slope excavation slope ratio control device which comprises a horizontal pedestal, a holder balancing device, a crawler walking system, a counterweight assembly, a parallel lifting mechanism, a measuring clamping plate strip device and a measuring auxiliary tool. A soil shoveling plate used for pushing and removing falling soil is arranged on the lower side of the front portion of the crawler walking system, a front hinged support is arranged at the left end of the horizontal pedestal, a counterweight assembly is arranged at the right end of the horizontal pedestal, the parallel lifting mechanism is rotationally connected with the horizontal pedestal through the front hinged support, and a first rope control device is fixedly installed on the upper portion of the horizontal pedestal. According to the invention, direct measurement of the slope angle is changed into indirect measurement, the operation is easier, and large measurement errors caused by different compaction degrees of soil are avoided.

The application relates to the field of geophysical exploration, and discloses a method and device for determining the dip angle of an underground structure based on three-dimensional seismic data. The method comprises the following steps: determining a first apparent dip angle of a main survey line direction and a second apparent dip angle of a connecting line direction at a target position in three-dimensional seismic imaging data; and determining a true dip angle of a stratum at the target position by a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle. First, three-dimensional seismic imaging data is obtained through conventional seismic data processing, then the three-dimensional seismic imaging data is scanned along the main survey line and the connecting line directions respectively to obtain the apparent dip angles of the two directions, and then the true dip angle information of the underground structure is obtained by converting the apparent dip angles of the main survey line and the connecting line directions based on an angle conversion model, and the dip angle extraction of all sampling points in a three-dimensional work area is completed. The extracted apparent dip angle information of the main survey line and the connecting line slope information has the advantages of high stability and high signal-to-noise ratio.

The application discloses a shallow-buried loess tunnel arch load calculation method considering the influence of vertical joints, and comprises the following steps: step S1, a vertical joint dislocation mechanical model is established; step S2, based on the vertical joint dislocation mechanical model, the vertical joint dislocation mechanical model is decomposed into multiple soil column unit bodies, and horizontal and vertical direction mechanical balance equations are established; step S3, based on the soil column unit body, force analysis is carried out on the contact surface of adjacent soil column unit bodies, and the friction force between the soil column unit bodies is determined; step S4, based on the vertical joint dislocation mechanical model, in combination with the curve slope of stratum settlement, an angle expression between the thrust between the soil column unit bodies and the horizontal direction is determined; and step S5, the vertical load of the tunnel arch is determined. The application introduces a loess vertical joint mechanical model, simplifies the vertical joints into multiple independent soil column unit bodies, and improves the accuracy of tunnel arch load calculation.

This invention provides a method and related apparatus for calculating the comprehensive critical stability slope ratio of multi-soil riverbank slopes. The method includes: selecting a target bank section and obtaining soil layer distribution data and soil physical and mechanical parameters of the target bank section; based on the soil layer distribution data, performing linear fitting on the scattered sequence of natural bank slope morphology to simplify the bank slope morphology; then, according to the soil layer interface elevation and river water level elevation, vertically dividing the simplified bank slope into blocks; based on the divided soil blocks and the soil physical and mechanical parameters, calculating the sliding force and anti-sliding force of each soil block, thereby obtaining the total sliding force and total anti-sliding force; based on the total sliding force and total anti-sliding force, adjusting the slope toe θ value through trial calculations until the total sliding force equals the total anti-sliding force, and outputting the corresponding critical stability slope ratio as 1:1 / tanθ. This invention can solve the problem of the lack of theoretical support in existing empirical methods, and can be used to assess bank slope stability and bank collapse risk, ensuring flood control safety and river stability.

The embodiment of the application discloses a kind of elevation data correction coefficient calculation methods based on gradient, belong to the technical field of hydrodynamic simulation, including the following steps: download and obtain the initial DEM data needing correction, then download the DEM data with higher resolution than initial DEM data;The gradient of the grid point corresponding to two different resolution DEMs is calculated;According to the gradient value calculated in step two, the correction coefficient is analyzed and calculated;The gradient of the grid point corresponding to two different resolution DEMs is calculated, i.e. The ratio of grid elevation difference and horizontal distance between grid center points;And according to the gradient value calculated by different resolution DEM, the correction coefficient is calculated, which is used in the calculation of bottom slope slope term in two-dimensional hydrodynamic model. The low-resolution DEM data is corrected by proposing the correction coefficient, which improves the accuracy and calculation efficiency of subsequent two-dimensional hydrodynamic simulation. The calculation process of the present application is simple, easy to operate and easy to promote.