703 results about "Slope stability" patented technology

The invention discloses an adaptive and extended intelligent monitoring and early warning system for slope stability, which includes a geographic information collection module, a three-dimensional modeling module, a scheme selection module, a data collection module, a statistical analysis module, and an early warning module. The geographic information collection module is used for collecting The geographic location information of the monitoring area c is used to generate a GIS data model. The 3D modeling module is used to generate a 3D model of the monitoring area based on the pictures in the monitoring area. The three-dimensional model of the area determines the slope type, landslide risk, and determines the monitoring point, monitoring plan, and early warning plan. The data acquisition module is arranged at the monitoring point to collect the monitoring data of the monitoring point. The statistical analysis module is used to process the monitoring data based on the monitoring data. Generate various statistical data, and the early warning module determines the early warning model, early warning level, and disposal plan based on the monitoring data and statistical data. The invention can effectively reduce risks such as landslides.

A slope monitoring and early warning system based on deformation data comprises a plurality of surface displacement devices and a communication base station. The surface displacement devices send collected data information to the communication base station, and data interaction is carried out between the communication base station and a far-end monitoring center. According to a slope monitoring and early warning method based on the deformation data, a slope stability computational formula is deduced according to measured point displacement values and angle deviation values through analysis on a slope deformation instability mechanism based on theories of rock and soil mechanics. Dangerousness states on a slope are judged according to slope stability coefficient indexes, and therefore dangerousness classification on the slope can have fixed indexes and standards. The slope monitoring and early warning method based on the deformation data is different from the existing displacement-time method that different slopes have different early warning displacement values.

The invention provides a method for analyzing bench slope stability under blasting effect, and belongs to the technical field of open-pit mining. Compared with a conventional method, the method combines numerical simulation with vibration monitoring, and uses vibration information of a slop body to correct material parameters of the slop body, and provides more accurate input parameters for numerical simulation. A numerical simulation method coupling finite elements with discrete elements is used to perform mechanical analysis, and progressive failure process of the slope under blast load effect is completely depicted. A calculation result is more accurate. Rupture degree is used to evaluate slope stability, and internal damage and rupture conditions of a slope body can be directly reflected, and an evaluation index is more reasonable.

The invention belongs to the slope stability estimation and landslide hazard monitoring and early warning technologies. A landslide forecasting method capable of utilizing underground water levels and displacement real-time monitoring includes the following steps: (1) landslide preliminary reconnaissance and monitoring point selection; (2) monitoring arrangement and installation of equipment; (3) monitoring the landslide displacement and the underground water levels in real time and processing real-time monitoring data; (4) statistical analysis period by unit and confirming mean-value underground water level HO and a displacement speed VO; (5) confirming underground water level loading and unloading parameters and loading and unloading quantities; (6) confirming displacement speed response parameters and displacement response quantities; (7) confirming the landslide displacement speed and underground water level loading and unloading response ratio parameters and numbers; (8) applying the underground water levels and displacement speed loading and unloading response ratio to carrying out evaluating slope stability and monitoring and early warning. According to the landslide forecasting method capable of utilizing the underground water levels and the displacement real-time monitoring, produced erroneous judgement or mistake judgement that landslide physics mechanical parameters, boundary conditions and the like can not be confirmed difficultly and accurately by the transitional ultimate equilibrium mechanics appraisal method can be overcome effectively.

The invention relates to a protection method suitable for the high and steep side slope ecological restoration technology. The protection method is characterized by comprising the following steps that, 1, the slope surface is tidied, and a side slope is measured; 2, an anchor rod is driven into a high and steep side slope and grouting is conducted for support; 3, vertical and horizontal support lines are installed, and a grille net is laid and hung on the slope surface; 4, a steel wire rope net is laid and hung on the grille net; 5, an angle steel bracket is installed, in addition, the angle steel is fixedly welded with the anchor rod; 6, a gabion mesh and a nutrient geotextile are laid in a layered mode; 7, primary level vegetation concrete is seeding-sprayed; 8, a nutrient substrate is seeding-sprayed on the primary level vegetation concrete; 9, top-level vegetation concrete is seeding-sprayed on the nutrient substrate; 10, an independent planting groove is formed in the top-level vegetation concrete to plant seedlings; and 11, maintenance and management are conducted. According to the protection method for the high and steep side slope ecological restoration technology, the ecological restoration problem of the side slope with the slope being greater than 60 degrees can be solved effectively, the ecological environment is restored, and a new method is provided for solving the problems of high and steep side slope ecological restoration and side slope stability.

The invention relates to a multi-index comprehensive evaluation and early warning method for slope stability. The method comprises the steps of monitoring landslide displacement, rainfall and underground water level data and pre-processing the acquired data; determining a landslide rear edge deformation crack connection rate and a vertical displacement direction rate; dividing landslide into stability stages according to landslide stability evaluation indexes and setting qualitative and quantitative criteria; determining a sensitive rate of each evaluation index for landslide stability; determining a comprehensive evaluation value of the overall stability of landslide; determining landslide stability stage division and monitoring early-warning levels. The method comprehensively takes macroscopic geological deformation conditions, such as slope main slide area displacement monitoring point deformation and slope uplift and subsidence features, into consideration, selects multiple qualitative and quantitative indexes reflecting the overall stability of slopes, builds a quantitative evaluation model for the overall stability of slopes by using a weighting evaluation method, definitelyreflects an overall dynamic evolution process of landslide, comprehensively performs stage division and monitoring early-warning on the overall stability of slopes and increases the accuracy of prediction models.

The invention discloses a structural design method for a load-bearing section of a miniature anti-slip compound pile. The method comprises the following steps: 1, performing a field geological survey, and determining mechanical properties of a geotechnical slope body through tests; 2, evaluating the stability of a slope, and calculating the residual slide thrust of the slope; 3, considering the adjustment and the distribution of the slide force among piles of the miniature anti-slip compound pile, and determining the distribution ratio of the slide force under each pile; 4, calculating to obtain the residual slide thrust borne by each pile; 5, calculating the bending moment, the shearing force, corners and the displacement of the load-bearing section of each pile; 6, performing reinforcement design on the miniature anti-slip pile according to the calculated bending moment; and 7, rechecking designed reinforcing bars according to the calculated shearing force. According to the design method, the residual slope slide thrust distribution conditions of each pile of the miniature anti-slip compound pile are determined, the reinforcing function of each pile body in the combined pile consisting of multiple piles is determined, the distribution of the anti-slip effect on each pile is obtained, the structure effect and the pile-soil action effect of the miniature anti-slip compound pile are considered, and the internal force calculation result is accurate and scientific, so that the bending resistance, the shearing resistance and the safety of the miniature anti-slip compound pile are guaranteed.

The invention relates to a method of detecting stability of a rock mass side slope and warning and forecasting instability of the side slope by adopting motive power increment displacement response ratio parameters. A motive power monitoring and warning method of rock mass landslide includes the following steps: (1) ensuring side slope geometric elements to be detected, mapping of a sliding surface and self weight of a landslide body, (2) designing and arranging side slope downward sliding motive power and displacement monitoring points, (3) monitoring and ensuring the side slope downward sliding motive power and downward sliding displacement response, (4) ensuring side slope downward sliding motive power loading rate parameters, (5) ensuring side slope downward sliding displacement response rate parameters, (6) ensuring landslide motive power increment displacement response rate parameters, (7) ensuring a landslide stability motive power increment displacement response rate criterion, and (8) monitoring side slope stability and monitoring and early warning. Stability coefficients of a limit equilibrium method are organically coupled with a displacement timing sequence analytic method and characteristics of displacement predictive parameters, and limitations of a traditional method are overcome.

The invention discloses an opencast mine end slope near-slope mining method. During an opencast mining process, for integral side slopes of end slopes on two horizontal sides of a mining field, near-border mining is carried out according to a stable angle alpha as in an initial design; according to a timeliness slope principle, inner dump is followed up in time; a pit bottom distance is shortened to a minimal safety distance Dmin required by mining, and integral height H of the side slope of the end slope is reduced; according to a side slope stable condition, the side slope angle is increased to beta; and near-slope mining is realized. The height of inner dump bottom layer slope-pressing step is 2-3 times that of mining working slope step. Stripped soil and rock are transported to the inner dump bottom layer slope-pressing step through a built soil-discharge bridge. With the method provided by the invention, side slope angle can be increased on a basis that slope end stability is ensured. Therefore, end slope residual coal can be recovered; stripping ratio can be reduced; and transportation cost can be reduced.

The invention relates to a seafloor instability evaluation method. The method comprises: firstly, selecting out critical geological factors influencing seafloor slope stability according to geological environment conditions of seafloor slope occurrence and basic conditions of seafloor slope instability; secondly, selecting out critical induction factors influencing seafloor slope stability through a decomposition mode and a decomposition effect of natural gas hydrates, and constructing a seafloor slope stability influence factor index system; thirdly, constructing a seafloor slope geomechanics model by generalizing the seafloor slope stability influence factor index system; and finally, based on a Mohr-Coulomb failure criterion, proposing a mathematic method for evaluating seafloor slope stability, i.e., an improved finite element strength reduction method, and analyzing an evolutional process of seafloor slope stability and seafloor slope instability induced by decomposition of natural gas hydrates. The method is scientific in principle, high in calculation precision and short in calculation time, considers the induction factors of seafloor slope instability caused by decomposition of natural gas hydrates for the first time, gives out a deformation process of slope instability in combination with the geomechanics model and the finite element numerical analysis method, and has important practical application values.

The invention discloses a constructing method for mining an embedded artificial boundary ore pillar from an open-pit to underground mine. The constructing method comprises the following steps of: firstly, digging a trench at the boundary of an open-pit bottom ore body and surrounding rock as a transmitting road; secondly, carrying out robbing and filling on the ore body in the pit in three layers by adopting an upward drift filling method; requiring each layer of drift to overdraft and enter an upper-wall surrounding rock; after each drift is robbed, paving an artificial reinforced concrete false bottom and then filling; realizing the connection between every two filling units by connecting constructing ribs of adjacent drifts; after each layer of drift is robbed and filled, paving an artificial reinforced concrete false bottom in the trench and carrying out lap welding on connecting drift with constructing ribs of the trench; filling a layer height to next layer in the trench; and finally, forming the embedded artificial boundary ore pillar in the open-pit bottom. The pit bottom treatment is realized by using the method, so that the aims of recovering ore pillar resources, maintaining the slope stability, isolating open water burst, blocking off underground air leakage and stopping the influence on the underground production by external weather can be achieved.

The invention discloses a side slope protection method for sand-filled road bed. The method comprises the following steps: performing drainage treatment of the base of slope, anchoring according to the slope rate of the roadbed side slope, wrapping sand in woven bag, stacking on the slope, back-filling, artificially compacting, finishing the slope, paving pre-cast concrete hollow block with settlement joints in the gaps, packing oakum or pitch in the joints, filling earth in the hollow portions, artificially compacting and leveling, and coating turf covers. The invention has the advantages that the invention successfully overcomes the stability problem of side slope of sand-filled road bed, and can efficiently prevent the collapse of outside clay during the construction on the sand-filled road bed and the damage of shallow layer caused by compaction failure of the sand-filled road bed; the invention can efficiently drain the water accumulated on the foundation of sand-filled road bed and simultaneously prevent the loss of sand particles; the field construction is more convenient; the production scale is flexible; the whole slope is orderly, stable and beautiful; the erosion resistance of side slope is improved; and the drainage capacity of the protective surface is improved.

The invention discloses a simulated test unit and method for slope stability with faulting, relating to the technique of rock-soil mechanical test. The test unit is characterized in that: a soil sample in a fault soil model instrument is divided into hanging wall and footwall by the fault surface; a first continuously variable transmission (CVT), a first power transmission system, and a supporting leverage are connected with the hanging wall successively and provide power for displacement to the hanging wall; a second CVT and a second power transmission system are connected with the footwall successively and provide power for displacement to the footwall; a displacement mark, a soil pressure box and a dial indicator are put in the soil sample, and the relative data are recorded. Accordingto the invention, the movement processes of transformation and damage of slope containing fault soil are represented accurately, so that the invention provides a new approach for studying formation mechanism of landslip and other geological disasters under complex geological environmental conditions.

The invention discloses a side slope dynamic stability coefficient determination method and technology based on underground water level change and displacement monitoring data. The landslide formation motivation and mechanism are cross coupled with displacement response information change and an evaluation method thereof. A nonlinear unload and load response ratio parameter prediction model is established so that the side slope stability coefficient determination method based on underground water level and displacement change is established. According to the landslide displacement prediction method, the idea of a conventional displacement time sequence prediction method that only landslide displacement or displacement rate is selected to act as monitoring and evaluation parameters is changed, and simultaneous monitoring and integration of landslide underground water level and displacement or displacement rate are put forward so that the coupling integration power prediction parameter and evaluation method of landslide underground water level and displacement or displacement rate is confirmed. The limitation that a static limit mechanics evaluation method cannot analyze and evaluate the change rule of side slope stability along with time can be overcome by the method, and a defect that the conventional displacement time sequence prediction method cannot analyze and evaluate the landslide formation mechanism and motivation can also be overcome by the method.

The invention discloses a mountain road slope real-time monitoring and early warning device, and relates to the field of geological disaster detection. The mountain road slope real-time monitoring and early warning device comprises a wireless sensor node, a central calculation node and a changeable traffic indication system. The wireless sensor node acquires vibration, inclined angle change and deformation parameter information on a slope in real time, and sends data to the central calculation node through a Zigbee wireless transmission module. The central calculation node collects and stores data from each sensor node, performs infusion fusing process, analyzes the slope stability condition automatically and makes real-time early warning for disasters. The central calculation node can send a command to a changeable traffic indication board for displaying the early warning information through the Zigbee wireless transmission module, meanwhile informs relevant departments and relevant personnel through a GPRS (General Packet Radio Service) network, and issues the early warning information on the Internet. The mountain road slope real-time monitoring and early warning device is simple in structure, flexible in layout, convenient and practical, can be used for real-time monitoring and early warning of the slope state, and can efficiently reduce loss of life and property caused by slope geological disasters.

The invention relates to three-dimensional slope stability prediction method under an earthquake load effect. The method comprises the following steps. Firstly, a specific to-be-predicted slope body is chosen, the three-dimensional sliding surface shape and the geometric dimension are confirmed, three-dimensional surfaces are divided into a slip surface and a side slope surface, and the slip surface and the side slope surface are shown with equations. Secondly, discretization is performed on the three-dimensional slope body. Thirdly, a predicated equation set of three-dimensional slope stability with consideration of the earthquake load effect is set, and last data of a three-dimensional slope stability coefficient is obtained through the equation set. Fourthly, whether the stability coefficient is larger than a set slope stability critical value or not is judged based on the last condition of the stability coefficient and by searching the most disadvantageous condition of the slope under the earthquake load effect. The three-dimensional slope stability prediction method under the earthquake load effect has the advantages that a dynamic effect of earthquake load in a slope engineering is considered, calculation precision is improved, and a predicted result is reliable.

The invention discloses a river critical levee section washing safety analysis and bank slope stability judgment method. The method comprises the steps of 1, generating a data set used for constructing a two-dimensional river channel water/sand model; 2, setting model calculation parameters and definite solution conditions according to river reach parameters in the research area, and constructing a two-dimensional water/sand numerical simulation model of the research area; step 3, setting various working conditions according to sand coming conditions under different flood conditions, simulating river water/sand transportation and river bed silt flushing of a research area by utilizing a two-dimensional water/sand numerical model, analyzing dangerous river beds before and after flood based on a simulation result, and respectively calculating river dangerous bank slope river bed depth flushing distance and river lateral erosion distance; and step 4, constructing a finite element model for seepage-stability analysis of the bank slope of the critical levee section, and quantitatively researching the relationship between each factor and the bank slope stability safety coefficient. According to the method, the stability of the riverway dangerous work bank slope under the action of water flow flushing is studied, and a quantitative means is provided for critical levee section stability evaluation.

The invention discloses an analysis testing device for simulating influences of rainfall and moisture content on side slope stability. The analysis testing device is composed of a side slope rainfall simulating system, a side slope testing platform system and a data acquisition analysis system, wherein in the side slope rainfall simulating system, a loop is composed of a water tank and a water pipe; the water pipe is provided with a water pump, a valve, a flow meter and shower nozzles; the shower nozzles are uniformly distributed at the top of the side slope testing platform system; in the side slope testing platform system, an inclined platform is located on a bottom plate; a thread rod and a rotary wheel connected with the thread rod are arranged under the bottom plate; a photographing wall is parallel to the rotary direction of the inclined platform; in the data acquisition analysis system, sensors are uniformly arranged on the bottom plate; a camera is located on the photographing wall and a sensor data collection device is arranged at one side of the bottom plate; and the sensor data collection device and the flow meter are connected with a computer by data transmission lines respectively. The analysis testing device has the advantages of high precision, simplicity and convenience for operation, and strong repeatability.

The invention relates to a three-dimensional slope stability prediction method. The three-dimensional slope stability prediction method comprises steps as below: step one: selecting a slope body to be specifically predicted and determining the shape of the three-dimensional sliding surface and the geometric dimension of the slope body; the three-dimensional sliding face is divided into a slip surface and a slope surface, and the slip surface and the slope surface are expressed by equations; step two: carrying out discretization of the three-dimensional slip slop body; step three: building an equation set of the prediction of the three-dimensional slope stability, and obtaining the values of the three-dimensional slope stabilization coefficients Fs; step four: judging the stability of the three-dimensional slope according to the critical value of the stability coefficients. The three-dimensional slope stability prediction method has the advantages that calculation accuracy is improved and prediction result is more stable.

The invention discloses a spray-sowing slope protection structure for a steep rock side slope. The spray-sowing slope protection structure is composed of a supporting reinforcing assembly and planting matrix, wherein the supporting reinforcing assembly comprises a galvanized iron wire mesh, planting strips, an active protective net and an anchor rod; the galvanized iron wire mesh is suspended on the slope surface of a side slope; the planting strips are long-strip bags which are sewn by non-woven fabrics, and planting soil mixed with a fertilizer are contained in the long-strip bags; the long-strip bags are alternated and horizontally arranged along the slope surface, and are tied on the galvanized iron wire mesh by iron wires; the active protective net is laid and suspended outside the planting strips; and the active protective net is fixed on the slope surface by virtue of the anchor rod. The planting matrix is a mixture of soil, organic substances, a binder, a fertilizer, a water-retaining agent, a PH regulator and plant seeds, is prepared by uniformly stirring the mixture, and is sprayed on the slope surface with the planting strips; and the planting matrix is 10 cm thick. A setting method for the slope protection structure comprises the following steps: renovating the slope surface, laying and hanging the galvanized iron wire mesh, laying the planting strips, laying and suspending the active protective net, and spraying the planting matrix. According to the spray-sowing slope protection structure, a side slope reinforcement and protection technology and a green protection technology are organically combined together to achieve the effects of preventing rockfall, guaranteeing side slope stability, afforestation and environmental protection.

The invention discloses a soil slope multi-field coupling simulation testing device which comprises a model box body, a counter force loading device, an electric heating system, an artificial rainfall system and a temperature and strain measurement acquisition system. The model box body is in a cuboid shape and provided with five closed faces and a top opening. The box body structure is formed by a steel structure through pouring and welding. The front side of the box body is welded into a whole in a grid shape through steel bars. A piece of tempered glass is arranged on the inner side of the grid. Slope models are stacked in the box body. The counter force loading device is installed on the upper portion of the testing device. The electric heating system is disposed at the bottom of the testing device. The artificial rainfall system is arranged above the testing device. The soil slope multi-field coupling simulation testing device is an indoor model device which aims at estimating soil slope stability under the multi-field effect, and can analyze stability of slopes under the influence of various factors.