67 results about "Slope failure" patented technology

The invention relates to a method for rapidly monitoring deformation and controlling a measured deformation value within instrument precision by the aid of a ground-based three-dimensional laser scanner serving as a measuring instrument through instruction fixing technology. The method includes the steps: (1) fixing the three-dimensional laser scanner onto an observation pillar, setting a fixed point reference target and attaching a reflector onto an observation object; (2) rapidly scanning the observation object by the aid of the three-dimensional laser scanner; (3) searching a reflection center of the reference target; (4) registering scan files in different time series according to the reflection center of the reference target; (5) finding a coordinate of a reflector center of the observation object after registering; and (6) comparing the change of the coordinate in the different time series. The method is applicable to rapidly monitoring deformation of slope failure at a deformation stage, slope excavation and various deformation bodies.

The invention provides a side slope stable reliability sensitivity analysis method based on Monte Carlo simulation. The side slope stable reliability sensitivity analysis method based on the Monte Carlo simulation includes: step 1, constructing a joint probability density function of uncertain parameters; step 2, using a Monte Carlo simulation method to obtain a side slope failure probability, and obtaining a failure sample; step 3, designing various sensitivity analysis schemes, and respectively constructing joint probability density functions of uncertain parameters under all the sensitivity analysis schemes; step 4, obtaining side slope failure probabilities under all the sensitivity analysis schemes; step 5, obtaining a variation trend of the side slope failure probabilities along with statistical characteristics of the uncertain parameters according to the side slope failure probabilities under all the sensitivity analysis schemes. The side slope stable reliability sensitivity analysis method based on the Monte Carlo simulation is wide in application range, simple in computation process, high in computation efficiency, and capable of effectively revealing a response regularity between the reliability level of a side slope and the statistical characteristics of the uncertain parameters, and has certain guiding significance for side slope risk control, design optimization and the like.

In a method of critical displacement forecast based on the deformation failure mechanism of slope, a sliding surface displacement, a calculation based on status stability factors and a slope surface displacement are determined, and applied for forecast based on a thrust-type slope deformation mechanism, a key compartment division, a relation between stress and strain mechanics properties of sliding surface of geo-material, and an analysis of evolution characteristics at different points of the sliding surface. The method provides advantages of determining deformation values at different points of a sliding surface, a slope body and a slope surface during slope failures; describing the process of a progressive failure, deformations and force changes of a slope; combining slope monitoring values to perform the stability analysis and the calculation of the magnitude of the stability factors in different deformation statuses of the slope; and assessing the durability of protective measures to the slope.

The invention discloses a slop instability mechanism judgement method, wherein according to the three-dimensional numerical model of the slope, based on the strength reduction method and the slope progressive failure theory, dividing arbitrary points of the slope into four stages of stability, basic stability, under-stability and instability according to the slope failure theory and the slope macroscopic deformation characteristics; and the slope instability mechanism is obtained by comparing and analyzing the evolution characteristics of the stability of each segment of the sliding body underdifferent reduction factor conditions. The method can be used for scientific analysis of landslide hazards and provide a theoretical basis for slope reinforcement.

The invention relates to a multi-block slide calculation method for a giant landslide, and belongs to the field of geological disaster engineering. The method is used for landslide disaster stability evaluation and engineering prevention and control. The method comprises the steps of: (1) finding out a landslide region range, deformation features and hydrogeology and engineering geology conditions; (2) based on a finite element program, establishing a finite element numerical model of a side slope; (3) inputting formation mechanical parameters of the side slope; (4) inputting reduction parameters and physical and mechanical characters of landslide massif for performing finite element calculation; (5) determining a side slope failure region; (6) continuously reducing failure strength parameters until slide surfaces are communicated; (7) determining a tension failure zone of each stage of slide surface; (8) setting the tension failure zone as a null unit in the model; and (9) re-calculating a new numerical model and searching out multiple stages of slide surfaces. According to the multi-block slide calculation method for the giant landslide, provided by the invention, the multiple stages of slide surfaces of the giant landslide can be accurately searched out and an important basis is provided for giant multi-stage landslide stability evaluation and engineering prevention and control.

The invention relates to a test tank for water-level soaking stability of a dam, in particular to a test tank for high-water-level soaking stability of a dam, and aims to solve problems of difficulty in provision of constant water levels and difficulty in control on water leveling falling speeds in existing dam stability test devices, difficulty in monitoring of dam seepage fields and difficulty in monitoring of dam slope failure and instability changes. The test tank comprises a water pump, a water supply pipe, a balance water tank, an overflow pipe, a water adjusting device water outlet pipe, a hydraulic lifting device, a connecting pipe, a water inlet pipe, a test tank body, a track, an ultrasonic automatic terrain measurement and analysis system, an upstream organic glass sieve plate, a ruler, an upstream inserting groove, an upstream earth retaining plate, a piezometric pipe, a downstream inserting groove, a downstream earth retaining plate, a downstream organic glass sieve plate, an angle steel support, water discharge pipes, valves and water meters. With the test tank, water conservancy conditions such as the constant water levels, control on the water leveling falling speeds and the like can be provided, and pore water pressure and seepage lines inside the dam are monitored. The test tank for the high-water-level soaking stability of the dam can be obtained.

The present invention provides an incident plane body wave excitation method in either direction in slope seismic response value simulation, belonging to the geologic hazard analysis and control field. The method comprises six steps: slop modelling; time series analysis starting of each node on the slope bottom excitation boundary of the incident plane body wave excitation method in either direction; stress component time-history calculation generated at each node at the slope bottom through different seismic phase body wave excitation; superposition time-history calculation of different body wave seismic phase fluctuating stress component at the slope bottom excitation boundary nodes; slope bottom excitation boundary node body wave excitation input; and dynamic response result extraction of each node in the slope model. The incident plane body wave excitation method in either direction in the slope seismic response value simulation can solve the problem of the incident seismic wave input in either direction in the slope seismic response value simulation, realize the incidence of the seismic plane body wave in either direction including oblique incidence and vertical incidence, reveal the influence of the seismic plane body waves with different incident directions on the slope seismic dynamic response and the diversity of the seismic slope failure, and has great significance.

The invention discloses a model for researching jointed rock slope, and a manufacturing method of the model. The cross section of the model is a hexagon, the top surface, the bottom surface of the slope and the bottom surface are parallel to each other, the slope exists between the top surface and the bottom surface of the slope, the variation range of the side slope tilt angle is 30-75 degrees, the side face between the top surface and the bottom surface is perpendicular to the top surface and the bottom surface respectively, and the side face between the bottom surface of the slope and the bottom surface is perpendicular to the bottom surface of the slope and the bottom surface respectively. The manufacturing method comprises configuration of rock-like materials, joint manufacturing, model setting and maintenance. Based on regulation of the proportions of the materials, the materials with different strength characteristics can be formed; a side face setting apparatus of the model is composed of strip-shaped moulds connected by bolts, the upper bottom surface and the lower bottom surface are made of plates, and the size of the side slope model and the side slope tilt angle are controlled by the moulds; and the joints in the model are formed by inserting soft and weak sheets in an etching groove. The model manufactured by the manufacturing method is simple in structure and low in manufacturing cost, and can be used for researching the influence of the joints in different forms and different positions on side slope failure mechanism.

A cover system is provided for waste sites and environmental closures, in which the cover system comprises a synthetic grass and an impermeable geomembrane that can be applied without the use of heavy earthwork equipment as temporary or final cover to control odors, erosion, gas migration and contaminate migration. The invention allows installation on very steep slopes and does not require the use of an extensive anchoring system to resist wind uplift or slope failure.

The invention relates to the field of slope engineering, in particular to an efficient slope reliability analysis method. The method comprises the following main steps: 1, slope stability determinacyanalysis; 2, spatial variability simulation of rock-soil parameters; 3, identifying a representative sliding surface by utilizing a K-mean clustering analysis method; 4, establishing a response surface function relational expression of the representative sliding surface; and 5, calculating a slope reliability index or a slope failure probability. Compared with an existing side slope reliability calculation method, the method a representative sliding surface identification technical method which is simple and efficient and is relatively stable for different statistical parameters. The calculation efficiency of the representative sliding surface-based slope reliability analysis method can be improved, the application of the reliability analysis method in slope design can be expected to be effectively promoted, and the method has certain theoretical innovation significance and engineering practical value.

A Work Area Monitor comprising a radar module mounted on a motorised vehicle. The Work Area Monitor provides early warning of slope failure in a work area by generating an alarm if movement detected in movement data derived from interferometrically processed radar images exceeds a threshold.

The invention relates to a network-type collapse disaster monitoring and early warning system, which includes four components: a measurement unit, a control unit, a power unit, and a user unit. The acquisition module in the control unit receives sound related to slope collapse and deformation monitored by the measurement unit. The force data is transmitted to the user unit through the data transmission module. At the same time, the early warning threshold can also be set in the control unit. When the alarm condition is met, the alarm information is directly sent to the user unit to realize real-time monitoring and early warning. The invention has a simple structure, all parts used are commonly used electronic components, has low cost and high efficiency, and can be widely used in monitoring geological disasters of side slope collapse.

The invention discloses a rock slope slip test system which comprises a base, a mounting mechanism and a test mechanism are arranged on the base, the test mechanism comprises a bottom plate and baffles, a slope body is arranged between the two baffles, a circulating rainfall mechanism is arranged above the slope body, and a sliding groove is formed in one end of the bottom plate; the slope body sequentially comprises an overlying rock layer, a soft soil interlayer and a bed rock layer from outside to inside. A collecting groove is formed in the base, and a filtering mechanism is installed at the bottom of the collecting groove and communicated with the circulating rainfall mechanism. According to the rock slope slip test system provided by the invention, bedding rock slope slip motion in nature can be simulated in an indoor experiment, and the rock slope slip test system is used for researching a slope failure process and mechanism; bedding rock slope sliding motion of different combined structural planes in the nature can be simulated; in addition, corresponding damage test data can be obtained by adopting corresponding detection instruments, and the system is used for deep research on the damage process of the rock slope.

The invention provides a multi-working-condition coupling landslide model test device. The device comprises a model frame assembly, a rainfall simulation assembly, a water flow scouring assembly and a lifting assembly; the model frame assembly is used for piling up a sample soil slope and simulating the reservoir water level lifting condition, the rainfall simulation assembly is arranged above the model frame assembly and used for simulating different rainfall intensities, and the water flow scouring assembly provides scouring water flow and water storage level for the sample soil slope in the model frame assembly; and the lifting assembly drives one end of the model frame assembly to lift to adjust the inclination angle. By adjusting the matching of clamping plates and the use of each component, the influence of rainfall, reservoir water level rising and falling, water flow scouring and other working conditions on the slope stability is simulated, so that the dynamic evolution process of slope instability under the coupling action of different working conditions is tracked, analyzed and researched, the test phenomena of slope damage under different influence factors are obtained, and the test possibility is provided for researching different instability mechanisms of the slope.

The invention discloses a slope reliability self-adaptive evaluation method. According to the method, a geometric model and related parameters of a slope are determined, Monte Carlo simulation is adopted to generate a random sample of uncertain parameters, Monte Carlo simulation analysis is carried out on a sliding surface each time through iteration to recognize a failure sample, and a new sliding surface is selected, so that the reliability of the slope is adaptively evaluated. According to the method, the calculation consumption can be effectively reduced, the steps are simple, the slope failure probability obtained through evaluation is monotonically increased and gradually converges, the calculation consumption is low, and a new scheme is provided for engineering slope reliability evaluation.

The invention provides a test device for simulating deformation and damage of a periglacial frozen soil slope. The test device comprises an inclined plate, wherein the upper surface of the inclined plate is provided with a thermal insulation layer for bearing a freezing layer; a shearing box body which is arranged on the inclined plate in a sliding mode, wherein the lower end of the shearing box body is open and supported on the freezing layer, and gravelly soil stacked on the freezing layer is laid in the shearing box body; a water supply part which is used for conveying water to the shearing box body; and a lifting mechanism which is connected with the inclined plate and is used for driving the inclined plate to incline to a set angle, so that the shearing box body and gravelly soil in the shearing box body slide in the simulated freezing and thawing process. The device has the beneficial effects that the freezing layer simulates a permanent frozen soil environment, gravelly soil in the shearing box body simulates a frozen soil side slope, the deformation and damage process of the periglacial frozen soil side slope is simulated indoors, the side slope damage mechanism is revealed, and the side slope damage condition under the real freezing and thawing cycle condition is restored; and conditions are provided for researching the influence of the freeze-thaw cycle effect on the stability of the gravelly soil slope.

The invention discloses a method for determining the spontaneous combustion temperature field and the combustion depth of slope residual coal. The method is characterized in that the movement of oxygen in cracks and the process of the reaction of the oxygen and a coal bed and the mutual development promoting of the oxygen and the coal bed are simulated based on PFC3D serving as a simulation platform with the help of a heating power coupling model of the PFC3D and the situation of cracks formed by slope damage caused by spontaneous combustion in earlier periods, and thus the slope internal temperature field and the combustion space area development depth are obtained; extremely small particles are used for simulating the flowing of oxygen and the reaction of the oxygen and the coal, and the process is achieved through FISH; the method comprises the following steps of structuring a slope model, forming an oxygen flow channel, structuring a residual coal spontaneous combustion microscopic model and simulating a temperature field result through heating power. The method can be used for analyzing the spontaneous combustion process of coal piles with certain scales.