65 results about "Landslide dam" patented technology

The invention discloses a water-sand coupling simulation method for a barrier lake outburst process, and relates to the field of water disaster prevention. The method comprises the steps of adopting acomplete water-sand coupling control equation to describe the barrier lake breach forming and developing process; solving the complete water-sediment coupling control equation by adopting a finite volume method in a high-precision MUSCL-TVD-HLLC format: reconstructing an interface Riemann value variable through MUSCL to enable the interface Riemann value variable to reach second-order precision,inhibiting numerical oscillation through a TVD algorithm, and calculating Riemann flux by adopting HLLC; discretizing terrain source items through a local terrain correction and water depth reconstruction technology; discretizing resistance source items by adopting an implicit method; and processing gravity collapse by adopting a simple geometric method to simulate a breach broadening process. Themethod is suitable for simulating the overtopping outburst process of the natural barrage, and scientific and technological support can be provided for barrage outburst flood prediction and risk assessment.

The invention relates to the field of geological disaster prevention and control, in particular to a method for preventing landslide and dammed lake disasters. The method aims to solve the problem that present geological disasters cause landslide and dammed lakes and endanger personal and property safety. The method for preventing landslide and dammed lake disasters comprises the steps of first surveying distributed position, distribution range, structural features, border conditions and physical and mechanics parameters of landslide, calculating a landslide stability coefficient according to surveyed data; determining possible unstable areas of landslide according to the landslide stability coefficient obtained through calculation, and simulating the unstable dammed lake accumulation range according to the possible unstable areas; and finally arranging an emergency flood discharge channel according to the landslide and dammed lake accumulation range. The method is suitable for preventing the landslide and dammed lake disasters.

The invention discloses a simulation device for researching the morphological characteristics of a landslide dam, and belongs to the technical field of geotechnical engineering. The simulation device comprises a transparent groove, wherein the groove consists of a base plate and two opposite side plates; the side plates are arranged at two longer edges of the base plate, and grid lines are arranged on the two side plates; the ends, which are away from the base plate, of the side plates are hinged with slope plates; the slope plates are located on the outer side of the groove and can rotate relative to the hinged edges of the side plates; the ends, which are away from the groove, of the lower surfaces of the slope plates on two sides are hinged with first jacks; the first jacks are uniformly distributed along the length direction of the groove; containers are arranged on the upper surfaces of the slope plates on two sides; the containers can be fixed at any positions on the upper surfaces of the slope plates; baffles at the ends, which are close to the groove, of the containers are openable and movable baffles. The simulation device is compact in structure and convenient to use, and the morphological characteristics of a dam body formed by the landslide dam are easy to observe and record.

The invention discloses a landslide weir dam breach depth measuring and calculating method and a landslide weir dam burst flood peak flow measuring and calculating method. Aiming at the defects in theprior art, the method for judging the erodibility of the water flow of the dam body of the landslide weir dam takes the median particle size of a dam body material as an index to quickly judge the erodibility degree of the water flow of the dam body. According to the landslide dam breach depth measuring and calculating method and the landslide dam breach bottom width measuring and calculating method, the specific calculation coefficient related to the dam body erosion characteristic is introduced into the measuring and calculating method, and the influence of the water flow erodibility of thedam on breach formation and evolution can be fully considered. According to the method for measuring and calculating the burst flood peak flow of the landslide weir dam, the burst peak flow is calculated by adopting a semi-analytical formula, and the calculation result is closer to a disaster field measurement value. According to the technical scheme, the calculation principle is scientific, therequired calculation amount is small, the requirements for data acquisition and calculation hardware are low, and the requirements for disaster prevention and reduction measures for quick response inlandslide dam formation and burst events can be fully met.

The invention discloses a video real-time monitoring system and method for emergency disposal of a landslide barrier dam. The system comprises a dynamic monitoring camera, a front-end detector, a video monitoring platform and a flood early warning system. The method comprises the following steps of monitoring upstream, middle and downstream key positions of a dam in real time by utilizing a dynamic monitoring camera; transmitting the video information acquired by the front-end monitoring equipment to a video monitoring platform; intelligent image analysis being carried out by utilizing artificial intelligence, geometrical characteristics of a barrage and real-time changes of upstream incoming water and the water level in the reservoir being obtained by combining existing measurement data,and the drainage basin area, the barrage height and the barrage volume being calculated; and the ArcGIS hydrological analysis module being used for processing the DEM data of the digital elevation model, and predicting the scale of a blocked river channel caused by landslide and the backwater range of a barrier lake. The method is advantaged in that problems that weir dam monitoring and early warning are not in time, a large amount of material resources and manpower are consumed, efficiency is low, and the swept range of dangerous cases cannot be accurately predicted are solved.

A method for regulating and controlling discharge flow of a dammed lake includes steps of: (S1) estimating a most dangerous discharge condition; (S2) based on the most dangerous discharge condition, calculating a structural internal force of the steel flexible net; (S3) based on the internal force of the steel flexible net, calculating an anti-slide embedded depth at two sides of the steel flexible net; (S4) based on the most dangerous discharge condition, manually excavating a channel; and (S5) based on the anti-slide embedded depth at the two sides of the steel flexible net, embedding the steel flexible net into a barrier dam. According to the present invention, the steel flexible net is laid on the upstream slope of the barrier dam, two sides of the steel flexible net is embedded into the slope body with gravels of the barrier dam, and cooperates with the channel for usage.

The invention discloses a construction method of an anti-scouring flood relief channel of a barrier lake. Slope steel wire meshes are laid on slopes on the two sides of the flood relief channel, a reinforced geomembrane is laid at the bottom of the flood relief channel, reinforcing steel bar gabions are arranged at the bottoms of the slopes on the two sides, multiple rows of prefabricated pier stones are arranged in the flood relief channel, each row of prefabricated pier stones are arranged in the width direction of the flood relief channel, each prefabricated pier stone is fixed to the bottom of the flood relief channel through a first anchor rod, every two adjacent prefabricated pier stones are connected through a second anchor rod, and the second anchor rods close to the slopes are fixedly connected to the slopes on the two sides. The flood relief channel constructed through the construction method can effectively reduce the scouring strength and flow speed of water flow, the anti-scouring capacity of the slopes on the two sides and the bottom of the flood relief channel is enhanced, and the damage and loss to the downstream are reduced. According to the construction method, the construction time is relatively short, the emergency preparation time can be shortened as much as possible, excavation and channel body reinforcement work of the flood relief channel can be guaranteed within a short time, and various geotechnical materials adopted in the construction process are low in price.

The invention discloses a multistage energy dissipating and water seeping debris flow landslide dam and a construction method thereof. The multistage energy dissipating and water seeping debris flow landslide dam comprises a water seeping barricade, energy dissipating stone cages and energy dissipating columns. A plurality of grooves are formed in the backface of the water seeping barricade, and aplurality of longitudinal water seeping channels and transverse water seeping channels are arranged in the water seeping barricade; the energy dissipating stone cages are arranged on the bevel backface of the water seeping barricade; a plurality of single stone cages are successively arranged and fixed as a whole, permeable geotechnical cloth is arranged between the energy dissipating stone cagesand the water seeping barricade, a plurality of scour prevention steel plates are arranged on the bevels of the energy dissipating stone cages, and the scour prevention steel plates are fixed together with the energy dissipating stone cages; the energy dissipating columns are arranged on the upstream side of the water seeping barricade and comprises a plurality of waste tires which are successively arranged from top to bottom, concrete columns are arranged in the middle of the waste tires, and the interiors of the waste tires are filled with pebbles. The multistage energy dissipating and water seeping debris flow landslide dam can weaken the impact energy of a debris flow, permeate and discharge water in an accumulation body of the debris flow and reduce damage of mud, stones and water tobuildings jointly, so that the debris flow disaster is reduced.

The invention discloses a method and system for evaluating the dam-break risk of a dammed lake based on a negotiable and cooperative work flow, which are used for the negotiable and cooperative evaluation of the dam-break simulation and influence analysis of the dammed lake. The system is characterized in that a distributed frame based on a four-layer system is adopted. The system consists of three parts: a moving Agent, an AgentHost and a cooperative Agent. In the invention, the centralized decision and treatment of disaster negotiation information are accomplished by providing cooperative virtual work environment of multiple point in different places, command and decision makers and related personnel at all levels in different regions can cooperatively communicate to share and exchange disaster information and take part in discussion about the dam-break simulation and the influence analysis of the dammed lake together, and the cooperative analysis and the evaluation of the dam-break risk of the dammed lake are achieved. The invention has the advantages of simple method and high execution efficiency, is suitable for multiple users distributed in different places to carry out negotiable and cooperative evaluation, and can effectively improve the work efficiency of the dam-break risk evaluation of the dammed lake.

The invention discloses an earthquake-induced landslide lake rescuing drainage device and an implementation method. The drainage device comprises a water inlet, a check valve, a check valve rubber gasket, a check valve rotating shaft, a water outlet, a valve, a valve rubber gasket, a valve rotating shaft, a valve clamping part, a valve clamping part rotating shaft, a telescopic pipe, a spiral telescopic bracket, a light high-strength and waterproof fabric, a female flange, a bump, a notch, a male flange, a screw rotating shaft, a thumb screw, a screw rod, a water filling nozzle and a water filling nozzle switch. The earthquake-induced landslide lake rescuing drainage device disclosed by the invention is composed of siphon parts which are telescopic and are easy to disassemble and assemble; and the drainage device is light in weight, high in strength and convenient for rescue workers to carry or for a helicopter to deliver. The rescue workers can conduct a drainage operation on a landslide lake which is formed by earthquake-induced landslide before large excavating machineries arrive, so as to reduce a water level and to avoid burst of the landslide lake as well as to provide time guarantee for the large excavating machineries, which arrive later, to excavate the landslide lake.

The invention discloses a barrier lake flooding range surveying and mapping method based on whole-process remote sensing data analysis, and the method comprises the steps: carrying out the quick calculation of the reservoir capacity of a barrier lake through employing a multi-grid discrete surface integral algorithm based on DEM remote sensing data; based on the reservoir capacity calculation result of the dammed lake, calculating the reservoir area flooding range by adopting a grid flooding algorithm, and performing graphical surveying and mapping display; introducing the longitude and latitude coordinates of the upstream residential point of the dammed lake, visually displaying the residential point on a graph, the upstream flooding disaster situation of the dammed lake under different water levels can be obtained, and decision support is provided for subsequent organization of safe evacuation of residents; and calculating and statistically analyzing the key technical parameters of the barrier lake according to a corresponding calculation formula, such as the maximum tail water length, the reservoir area submerging area and the water storage change characteristics. The defects that a traditional surveying and mapping method is limited in application condition and insufficient in timeliness are overcome, rapid surveying and mapping calculation is conducted on the upstream flooding condition of the barrier lake in the whole process based on DEM remote sensing data, and key technical information is provided for emergency rescue work of the barrier lake.

The invention discloses a barrier lake stability evaluation method. According to the invention, evaluation of the stability of the weir body needs to be combined with geological conditions, physical and mechanical indexes and seepage field parameters of weir body substances are reasonably selected, and a simplified graduation method based on an extreme equilibrium theory system can be generally adopted. Acting force between soil strips is considered when calculation is performed by using a simplified graduation spectrum method, so that a stability evaluation conclusion of the weir body can beobtained; a dimensionless accumulation body index method (DBI) is adopted to carry out preliminary evaluation on the stability of the weir body, so that a preliminary basis capable of being referencedis provided in the subsequent judgment process, the operation steps are simplified, and the labor burden of workers is reduced.

The invention discloses a barrier lake water level reservoir capacity relation calibration method. The method comprises four stepsof step 1, determining a drainage basin graph corresponding to a barrier lake occurrence point; step 2, cutting out a barrier lake ponding area dem from dem image data according to the drainage basin graph; step 3, making a plurality of equal straight faces at the outlet position of the dem drainage basin of the ponding area; and step 4, calculating accumulated water volumes corresponding to different elevations to obtain a water level reservoir capacity curve, andcalculating the water level reservoir capacity curve corresponding to the barrier lake according to dem digital elevation data when any point in the river collapses and the barrier lake is generated by applying the method, so that the disaster size and the escape time can be calculated and evaluated.

The invention discloses a barrier lake dam body dredging method. Firstly, a water storage groove is dug on a barrier lake dam body according to the thickness and length of the barrier lake dam body and the soil and stone stability of the barrier lake dam body; a plurality of water storage holes are dug in corresponding positions in the water storage groove; and water in a riverway is injected intothe water storage groove and the water storage holes by a water suction pump, so that the water in the water storage holes and the water storage groove is used for flushing away a landslide dam. By using the mode, the flushing power of the water is used for dredging the riverway. Compared with a riverway dredging mode of directly using explosives for blasting, the mode is safe. Further, before the water is injected into the water storage groove and the water storage holes, grooves are dug at the two sides of the water storage groove along the riverway or at least one row of holes are drilled;low-temperature liquid is injected into the grooves or the holes so as to freeze the soil bodies around the grooves or the holes; and therefore the secondary blockage due to soil body collapse at twosides of the dam body after the dam collapse can be prevented.

The invention provides a centrifugal model test device for maintaining normal water level overtopping burst of a barrier lake. A test water supply pipe is connected to the front end of a centrifugal model test box, and a drainage hole is formed in the bottom of the rear end; a reservoir area water tank, a weir plug body, a water measuring weir plate and a sand blocking grating are sequentially arranged in the centrifugal model test box from the front end to the rear end; an elevation-adjustable overflow pipe is arranged on the reservoir area water tank; the front end of the weir plug body is high, and the rear end of the weir plug body is low and used for accumulating outburst flood. And an inclined plate is arranged below the weir plug body and is provided with water permeable holes. The water level of a reservoir area can be kept stable in a barrier lake outburst centrifugal model test, so that the barrier dam outburst centrifugal model test can achieve the purpose of truly simulating the actual barrier body outburst process, and the method has extremely important scientific research value for researching the barrier lake overtopping outburst problem and understanding the whole process of outburst, breach occurrence and development of the barrier lake overtopping outburst problem.

The invention discloses a hydrological emergency monitoring and early warning method for a barrier lake. The hydrological emergency monitoring and early warning method comprises the following steps that S1, built water regime prediction systems on the upstream and the downstream of a barrier lake and an existing hydrological flood reporting station network are fully utilized, if the hydrological flood reporting station network is damaged in earthquakes, recovery is conducted as much as possible according to site conditions, continuity of hydrological data is kept, an existing data compilationprediction scheme can be applied; an experienced pre-announcer can comprehensively consider the forecasting result of a numerical weather forecasting model according to conventional ground and high-altitude weather detection data in combination with remote sensing monitoring information such as a satellite cloud picture, hydrological monitoring is hydrological observation under special environmental conditions, monitoring conditions are very severe, the personal safety guarantee degree is poor, quick response must be achieved during sudden dam break or large-scale artificial flood discharge; advanced observation equipment and technical means are adopted to automatically monitor rainfall and water level data, so that the timeliness of the monitoring data can be well guaranteed, and the personnel safety can be guaranteed.

The invention discloses a structure and a method for protecting a slope of a drainage groove network chain of a barrier lake. The structure comprises an initial drainage groove side slope (8), an initial drainage groove bottom slope (9), a collapsed drainage groove side slope (10) and a barrier body dam crest (11), wherein after a barrier body is collapsed, one end of a wedge-shaped network chain (6) is connected with an anchoring structure (3) through a chain (4), and the other end of the wedge-shaped network chain (6) is connected with a steel bar gabion submerged counterweight (7) through the chain (4); and the steel bar gabion submerged counterweight (7) and the wedge-shaped network chain (6) are positioned in a collapsed drainage groove (2) of the barrier body. The structure overcomes the defects that overtopping and collapsing flood is certainly formed and the damage capability is extremely high when the barrier lake freely develops in the prior art, and has the advantage of greatly shortening the construction time of drainage groove protection on a barrier lake construction site with traffic jam.

The invention provides a simulation method and a simulation system for a weir dam flood overtopping and breaking process. The method comprises the steps of obtaining information data of a barrier dam and a barrier lake, cyclically calculating the reservoir water level of the barrier lake, cyclically calculating the breach flow of the barrier dam, cyclically calculating the breach size of the barrier dam, establishing a three-dimensional spatio-temporal data model of the barrier dam and the barrier lake, performing three-dimensional dynamic display in the overtopping and dam breaking process of the barrier dam and the like. The simulation system comprises a client terminal used for receiving information data of the barrier dam and the barrier lake. The client terminal comprises a barrier lake and reservoir water calculation module, a barrier dam breach flow calculation module, a barrier dam breach size calculation module and a three-dimensional dynamic visualization module. The strong heterogeneous characteristic of the barrier dam and the water-soil coupling action mechanism of the breach are fully considered, and the accuracy of the simulation result of the barrier dam flood overtopping and dam breaking process is improved.

The invention discloses emergency video monitoring terminal equipment and an emergency video monitoring method. The terminal equipment comprises a fixed back plate, a rain baffle, a monitoring deviceand a bottom supporting assembly; the monitoring device comprises a shell and a monitor, wherein the shell comprises an upper cavity, a lower cavity and a central position, the upper cavity of the shell is filled with a buffer material, and a hole is formed in the lower cavity of the shell; the monitor is positioned in the center, and the surface of the shell is bent; the bottom supporting assembly comprises a bottom fixing support and a supporting unit; and the monitoring device is located in the bottom fixing support. According to the terminal equipment, during monitoring, when an earthquakehappens to a barrier lake, the monitoring device falls to the ground, the bent surface of the monitoring device diffuses force along the whole surface, the force borne by the unit area is reduced, and impact is resisted; and if the coastal area is submerged by flood, the monitoring device floats on the water surface in the mode that water enters from the lower portion and air is contained in theupper portion, and the monitor is protected. According to the terminal equipment, the problem that a video monitoring terminal for emergency monitoring of the barrier lake is easily damaged by earthquakes and flood disasters is solved, and the monitor is protected.

The invention discloses a method for rapidly predicting the peak flow rate of dam body outburst. The method is specifically implemented according to the following steps: step 1, collecting dam body outburst data samples including the erosion degree of a dam body and the soil particle size parameters of the dam body; step 2, classifying the data samples collected in the step 1 according to particle size parameters and erosion degrees of the soil body of the barrier body; step 3, carrying out dimensionless processing on the data samples collected in the step 1; step 4, performing radial basis function neural network model training on the data processed in the step 3; and step 5, processing a to-be-predicted weir body outburst data sample in the step 3, and inputting the to-be-predicted weir body outburst data sample into the model obtained in the step 4 to obtain the weir body outburst peak flow. According to the method, the problems that an existing prediction method does not consider the influence of the dam body erosion degree and the soil body particle size on the outburst flow, does not consider the nonlinear relation between parameters and is poor in prediction precision are solved, and data support can be provided for dammed lake outburst rescue, evacuation range delimiting schemes and the like.

The invention discloses a concrete pouring pipe device for preventing concrete segregation and a method. The concrete pouring pipe device for preventing the concrete segregation and the method are used for grooving construction of a diaphragm wall of a landslide dam. The method comprise the steps that pre-explosion treatment is carried out on the axis of the diaphragm wall of the landslide dam, and boulders with large volume are broken into small stones; after the pre-explosion treatment is completed, pre-grouting treatment is carried out on the upstream and the downstream of the axis of the diaphragm wall of the landslide dam, and leakage channels on the upstream and the downstream of the axis of the diaphragm wall of the landslide dam are blocked; after the pre-grouting treatment is completed, the grooving construction of the diaphragm wall of the landslide dam is carried out, specifically, a groove hole is formed through drilling and hole cleaning construction with the axis of the diaphragm wall of the landslide dam as the benchmark, then a concrete pouring pipe is lowered, and concrete pouring equipment is in butt joint with the concrete pouring pipe; and the concrete pouring amount of the concrete pouring equipment is controlled according to the sliding speed of a ball body in the concrete pouring pipe, so that concrete slowly falls to the bottom of the groove hole along with the ball body until the diaphragm wall of the landslide dam is formed through pouring.