131 results about "Rainfall simulation" patented technology

The invention provides a modular and multifunctional karst collapse physical simulation experiment platform. Comprising a rigid frame, a bearing device, a moving device, a loading device, a lifting device, a pile foundation construction dynamic load simulation device, a ground traveling dynamic load simulation device, a rainfall simulation device, a computer vision monitoring device, an underground water pumping and draining simulation device and an underground space excavation disturbance simulation device. The moving device is arranged on the bearing device, the lifting device, the loading device and the pile foundation construction dynamic load simulation device are arranged on the moving device, the travelling crane dynamic load simulation device is connected with a traction device of the moving trolley, and the camera shooting monitoring device and the rainfall simulation device are arranged on the rigid frame through a support. According to the method, key disaster-causing conditions in the urban environment are fully considered, the working condition scene coverage is wide, and the applicability is high; modularized design is adopted as a whole, all the modules can be flexibly loaded according to requirements, the real environment can be simulated more truly, and the catastrophe evolution process of surface collapse can be reproduced.

The invention relates to the technical field of automatic driving vehicle testing, in particular to a rainfall adaptive simulation control method and system for automatic driving vehicle testing. The method comprises the following steps: executing an outdoor rainfall simulation process through control parameters, and collecting behavior information of an autonomous vehicle in the simulation process; constructing a target function according to the deviation between the behavior information and expected information and the control parameters; iterating the strategy parameters by adopting a reinforcement learning framework based on a strategy gradient method and taking minimization of the target function as a target to obtain optimal strategy parameters; obtaining an optimal control parameter according to the optimal strategy parameter and the current rainfall state; and under the optimal control parameters, evaluating the performance boundary of the automatic driving system in the rainfall environment according to the behavior information of the automatic driving vehicle. According to the invention, the rainfall simulation scene with high precision and strong controllability is constructed, and the performance boundary of the automatic driving system in the rainfall scene is explored.

The invention relates to a rainfall observation method and device, a computer system and a medium, and solves the problem of high-reliability observation of regional rainfall. The method comprises the following steps: firstly, adopting reanalysis data and earth system mode output data to construct a first deep learning model of satellite inversion rainfall so as to reconstruct a lattice long-series rainfall data set; then, taking the rainfall attenuation information of the historical period as input, obtaining a rainfall simulation series of the corresponding historical period through different rainfall attenuation and rainfall intensity models, determining regional rainfall under the different rainfall attenuation and rainfall intensity models through a weighted link method, and preferably selecting an optimal rainfall attenuation and rainfall intensity model through long-series lattice rainfall data of the historical period; furthermore, a second deep learning model is constructed by adopting satellite inversion data and rainfall data inverted by a rainfall attenuation and rainfall intensity model, real-time correction of regional precipitation is realized, finally, real-time rainfall information of the region is deduced by adopting the optimal rainfall attenuation and rainfall intensity model and taking a real-time mobile signal as input, and the regional average precipitation corrected in real time is obtained.

The invention provides an intelligent landslide rainfall simulation system and method based on AI historical rainfall data driving, and belongs to the technical field of geological disaster monitoring and early warning. Dynamic coupling analysis and high-precision simulation of the rainfall process and slope stability are realized through automatic fusion of multi-source monitoring data and spatial-temporal feature extraction in combination with deep learning and physical mechanism modeling. The system can sense various types of data such as rainfall, soil moisture content and slope deformation in real time, intelligently identify landslide induced risks, output graded early warning information and support digital twinborn and adaptive risk optimization decisions. The landslide disaster risk assessment and early warning accuracy and response timeliness are remarkably improved, and the method has good intelligence, expansibility and practical application value and is widely applied to the fields of geological disaster prevention and control and engineering safety monitoring.

The invention discloses a device and method for simulating the freezing and thawing cycle process of collapsible loess in the natural environment, and belongs to the technical field of geotechnical engineering.The device comprises a test box provided with a sample groove, a rainfall simulation system is arranged on the upper portion in the test box, an underground water seepage simulation system is arranged on the lower portion in the test box, and the sample groove is connected with a loading system; a weighing system is arranged at the bottom in the test box, the weighing system is connected with an underground water seepage simulation system, a settlement and internal damage monitoring system is arranged between the weighing system and the rainfall simulation system, and a freezing and thawing circulation system is arranged on the inner side wall of the test box. According to the invention, the natural environment of the loess plateau area can be simulated, and the strength change of the strong salinized soil in the dry-wet process can be tested and researched under the combined action of various factors such as rainfall, load, underground water seepage and freeze-thaw cycle.

The utility model relates to the technical field of rainfall simulation, in particular to an artificial rainfall simulation device which comprises a water supply system, a control system, an intelligent terminal system and an acquisition system. The water supply system comprises a water tank, a water pump, a water inlet pipe and a rainfall sprayer. The water pump is arranged on the water inlet pipe and used for pumping water in the water tank to the rainfall sprayer. A control valve is arranged on the rainfall spray head; the intelligent terminal system is used for man-machine interaction, communication with the control system is realized by connecting a local area network built by the system, and data of the intelligent terminal system can be timely transmitted to the control system; the acquisition system comprises a rain gauge and a pressure sensor. The pressure sensor is arranged on the water inlet pipe and used for collecting the pressure value of the water inlet pipe. And the rain gauge is arranged below the rainfall spray head and is used for collecting rainfall. The device has the effect of facilitating rainfall research by simulating artificial rainfall.

The invention discloses a slope soil erosion prediction method, system, equipment and medium, and relates to the technical field of soil erosion, and the method comprises the following steps: taking slope soil with different grain composition as a research object, and carrying out a rainfall simulation experiment; constructing a production and construction project soil erosion prediction model according to the product of a subrainfall erosivity factor, a soil erodibility factor, a slope length factor, a slope factor and a slope surface area on the basis of the grain composition characteristic particle size; and predicting the soil erosion of the slope surface of the to-be-predicted production and construction project through the production and construction project soil erosion prediction model. According to the model disclosed by the invention, a direct quantitative relationship between the characteristic particle size and the erosion strength is established, so that an acquisition way of the soil erodibility factor is simplified, the dependence of the model on complex and expensive soil physical and chemical parameter analysis is greatly reduced, and the operability and the popularization efficiency of the model in a production field are greatly enhanced.

The invention relates to the technical field of soil erosion and cadmium migration simulation experiments, in particular to a karst slope cropland soil erosion and cadmium migration simulation experiment device and method.The karst slope cropland soil erosion and cadmium migration simulation experiment method comprises the steps that a preset soil sample is placed on a soil erosion simulation platform, and environmental factors are adjusted according to experiment requirements; comprising terrain gradient, earth surface rock exposure rate, underground porosity and geological structure; starting a rainfall simulation system, performing rainfall simulation according to preset rainfall intensity, duration and mode, starting a data acquisition system at the same time, and monitoring and recording rainfall parameters in real time; in the rainfall process, soil erosion phenomena including earth surface / underground sediment yield, runoff yield and erosion rate are observed and recorded, and sediment samples are collected through a sediment collector; and performing cadmium concentration determination on the collected sediment sample and runoff sample by using a cadmium concentration analysis instrument, and recording data. And a coupling mechanism between the erosion process and cadmium migration can be more comprehensively understood.

The invention discloses an urban flood simulation and safety evaluation method, and belongs to the technical field of hydrological data processing and flood rehearsal. The method comprises the following steps: firstly, collecting DEM data of a to-be-processed range, performing projection depression filling preprocessing through ArcGIS software, calculating a flow direction and a flow rate, extracting a river network, and constructing a catchment area and a rainfall flood model; carrying out rainfall simulation and one-dimensional hydrodynamic force calculation by using SWMM software to obtain a river channel and node time sequence flow; then, the flow data are input into HEC-RAS software, two-dimensional hydrodynamic simulation is completed in combination with the terrain, and the flood inundation range and depth are obtained; finally, repeatedly simulating rainfall in different recurrence periods, and dividing flood risk areas according to indexes such as a water depth threshold value and a flooded area. According to the method, full-process automatic processing from rainfall input to flood routing is realized, the timeliness and precision of flood rehearsal are improved, and support is provided for disaster prevention and reduction decisions.

The invention discloses an experiment device and method for dangerous rock mass collapse induced by earthquake-excavation-acid rain coupling, and belongs to the technical field of geotechnical engineering simulation experiments, and the device comprises a counter-force supporting assembly, an earthquake dynamic disturbance simulation application assembly, an engineering excavation disturbance simulation application assembly and an acid rain corrosion and rainfall simulation assembly; the earthquake dynamic disturbance simulation applying assembly, the engineering excavation disturbance simulation applying assembly and the acid rain corrosion and rainfall simulation assembly are all arranged on the counter-force supporting assembly, and the slope dangerous rock mass model is located in the counter-force supporting assembly. The experimental device can simulate influence factors such as earthquakes, engineering excavation, acid rain corrosion, rainfall and river scouring, the influence factors can be combined at will to simulate the inoculation and induction process of dangerous rock mass collapse disasters under the coupling condition of the various influence factors, and an experimental conclusion is obtained on the basis. The method can reflect the inoculation and induction mechanism of the dangerous rock mass collapse disaster more truly, and provides technical support for the prediction and forecast of the dangerous rock mass collapse disaster.

The invention belongs to the technical field of geotechnical engineering disasters, and particularly relates to an intelligent rainfall simulation system and method for a slope stability experiment. The system comprises an intelligent rainfall simulation unit, a comprehensive monitoring unit, a real-time data fusion and adaptive control unit and a data analysis-visualization unit which are organically unified and matched with one another. According to the invention, intelligent control of the rainfall process can be realized, and the rainfall intensity, raindrop size and rainfall uniformity can be accurately adjusted; the system is high in integration level and high in automation degree, real-time multi-dimensional monitoring can be achieved, and high-precision and real-time analysis of experimental data and automatic risk early warning are achieved. Advanced monitoring means such as DIC full-field strain, optical fibers and acoustic emission are adopted, the experiment precision is remarkably improved, an accurate basis is provided for slope stability analysis and disaster prevention and control, and the method can be applied to the fields of engineering slope safety evaluation, education and public safety and has a good application prospect in the aspects of geological engineering, geotechnical engineering, colleges and scientific research and teaching, emergency drilling and science popularization and the like. And safety and disaster prevention awareness are improved.

The invention discloses a rainfall dynamic simulation and regulation method, and relates to the technical field of artificial rainfall management and control, and the method comprises the steps: recognizing a catalyzable cloud layer of a rainfall demand region through a convolutional neural network, and generating a plurality of candidate catalysis regions according to the catalyzable cloud layer; the processing end dynamically simulates the spatial distribution of natural precipitation and post-catalysis precipitation of each candidate catalytic area based on a WRF-Chem model, outputs a selection influence factor for each candidate catalytic area, analyzes the selection influence factor and position information of the candidate catalytic area through the upper layer of the double-layer engine framework, and obtains the spatial distribution of the post-catalysis precipitation; and outputting a catalytic area sorting table by utilizing a lower layer of the double-layer engine framework, selecting a corresponding number of catalytic area information according to a rainfall demand, importing the selected catalytic area information into a large database for scene matching, and outputting an optimal regulation and control strategy for each selected catalytic area based on a genetic algorithm. According to the regulation and control method, rainfall simulation is carried out on each candidate catalytic area, it is ensured that the optimal area is selected for rainfall enhancement operation, and the overall rainfall uniformity and efficiency are improved.

The invention relates to the technical field of soil body tests, in particular to a sectional type full-automatic soil column temperature control system and method based on soil body temperature control. The system comprises a temperature control module, a model cavity, a rainfall simulation module and a measurement module, the model cavity comprises a container, a blocking net and a soil column, drainage holes are formed in the bottom of the container, the blocking net is laid on the inner side of the bottom of the container, the container is filled with soil, the soil column is evenly divided into multiple layers of soil layer structures with the same thickness, and the contact faces between soil layers are stricken off. The container is provided with an overflow port at a position higher than a specified height of the surface of the soil column, the rainfall simulation module provides rainfall to the surface of the soil column, the measurement module is butted with the soil column and the overflow port to collect soil column data, and the temperature control module controls the temperature of the soil column. According to the device and the method, the aim of accurately controlling the temperature at different depths of the soil column is fulfilled, so that the requirement of researching the seepage characteristics of the plant-green soil covering layer under different temperature conditions is met.

The invention discloses a mechanical arm spraying parameter regulation and control system for artificial rainfall simulation, particularly relates to the technical field of agricultural irrigation control, and is used for solving the technical problems of water pressure self-adaption lagging and spraying parameter instability during alternate irrigation mode switching caused by pipeline extension and retraction of existing mechanical arm irrigation equipment. According to the system, by detecting the length variation of a telescopic water pipe of the mechanical arm and the real-time water pressure value of a water pipe inlet, the flow entropy yield space gradient and the turbulent flow energy dissipation rate are calculated to generate the water pressure compensation amount; regulating and controlling the water pump pressure based on the water pressure compensation amount, and synchronously analyzing a target spraying parameter combination of the alternate irrigation instruction; pressure compensation and parameter adjustment are executed in a linkage mode in the moving process of the mechanical arm, and kinetic energy distribution is collected through a water drop impact sensor array; when the kinetic energy distribution uniformity does not reach the standard, the entropy production and turbulence calculation logic is reversely corrected; precise and stable control over spraying parameters under dynamic operation is achieved, and the multi-area and multi-mode switching requirement is met.

The invention relates to a door and window safety performance detection device for constructional engineering, and belongs to the technical field of constructional engineering detection. The uniformly distributed load force application assembly can apply uniform or gradient change pressure to the whole surface of the door and window to simulate wind pressure; the concentrated load force application assembly can perform fixed-point impact on specific parts of doors and windows and simulate hard object impact or violent forcible entry; the wind pressure loading assembly applies uniform and gradient-adjustable wind pressure loads to the surfaces of doors and windows, simulates stress states under different wind levels and detects the air tightness of the doors and windows, and the rainfall simulation assembly simulates rainfall environments with different strengths to detect the water tightness of the doors and windows; the deformation of doors and windows, the stress of key parts of the doors and windows, the water leakage condition and the air leakage condition can be monitored, and the comprehensiveness and the real-time performance of detection data are ensured. The system can achieve the detection of multiple safety performance dimensions of the doors and windows of the constructional engineering, effectively improves the detection efficiency and precision, reduces the manual operation intervention, and provides a comprehensive and reliable data support for the safety performance evaluation of the doors and windows.

The invention belongs to the technical field of water hammer effect suppression in regional rainfall simulation, and particularly relates to a water hammer effect suppression, regulation and control method for a regional rainfall simulation system. By monitoring the pressure change in the pipeline in real time and dynamically adjusting the valve opening degree of the adjusting valve according to the pressure data of the adjusting valve and the spray head, effective suppression of the water hammer effect in the rainfall simulation process is achieved, the stability of the rainfall simulation experiment is improved, the accuracy of the experiment result is ensured, and in addition, the experiment efficiency is improved. According to the scheme, pipeline water flow characteristics and real-time pressure changes are fully considered, so that prediction, regulation and control of the water hammer effect are more accurate, the requirement of high-precision simulation is met, in a rainfall simulation experiment, equipment damage and data deviation caused by the water hammer effect are effectively avoided, and in addition, the experiment efficiency is improved. And the potential water hammer effect risk in the real-time rainfall process can be early warned, and timely intervention is performed by adjusting the opening degree of the valve, so that the stability of the rainfall simulation experiment is further improved.

This invention provides an indoor testing device and method for the surface impermeability and erosion resistance of ecological slope protection. It includes a slope simulation device with a rainfall simulation device mounted above it. The slope simulation device comprises an inclined soil-rock bearing device and a slope soil-rock layer, on which a vegetation layer is arranged. The slope simulation device is supported by a slope adjustment device. The erosion material collection device includes a mud-water collection tank, a collection trough, and a collection container. The mud-water collection tank collects surface runoff and erosion material from the vegetation layer; the collection trough collects seepage water between the vegetation layer and the slope soil-rock layer; and the collection container collects mud-water that has infiltrated below the slope soil-rock layer. This invention considers the runoff at the interface between the substrate and the slope, comprehensively analyzes the infiltration patterns of rainfall on the slope, and provides data and basis for numerical simulation and analysis processes. It provides a more accurate quantitative evaluation of the impermeability and erosion resistance of vegetation, and is more rigorous than existing testing methods.

The invention provides an excavation and backfill prediction method and system for plateau airport flood control construction based on landform scanning, and the method comprises the steps: collecting three-dimensional landform point cloud data and image data based on a plurality of scanning devices, and constructing a three-dimensional landform model of a construction region; based on historical rainfall data and climate characteristics of the construction area, rainfall simulation is carried out on the three-dimensional landform model to determine influence performance of rainfall on all positions in the construction area, and a to-be-excavated area, a to-be-backfilled area and corresponding engineering indexes are determined in combination with the flood control design requirements of the plateau airport and the construction layout of the airport; and according to the three-dimensional landform model and the engineering indexes of the to-be-excavated and to-be-backfilled areas, respectively predicting the construction engineering amount of each to-be-excavated and to-be-backfilled area, and in combination with the position information corresponding to the to-be-excavated and to-be-backfilled areas and the related analysis data, generating a construction prediction report and sending the report to an engineering manager. The method achieves the reasonable planning and prediction of the flood control construction of the plateau airport.

The invention relates to the technical field of rainfall simulation, and discloses a portable field artificial rainfall simulation device which comprises a connecting rod, and the outer wall of the connecting rod is fixedly connected with a fixing block used for supporting other structures; the second limiting mechanism is mounted on the connecting rod and used for limiting a connected structure; the spraying mechanism is mounted on the second limiting mechanism and is used for simulating rainfall; the first limiting mechanisms are mounted at the two ends of the connecting rod and used for limiting the connecting rod; the lifting mechanism is mounted on the lower surface of the first limiting mechanism and used for adjusting the rainfall height; the lifting mechanism comprises a first connecting pipe. The rotating sleeve is rotated to drive the threaded rod to move, the first sliding block slides in the first connecting pipe, movement of the threaded rod is limited, the first connecting block is driven to move through movement of the threaded rod, the second connecting block is driven to move through movement of the threaded rod, and then the effect that the height is adjusted to be used in different terrains is achieved.

The invention discloses a porous asphalt pavement gap distribution uniformity and drainage performance testing method. A porous asphalt pavement needing to be tested is divided into a plurality of test road sections; detecting the water seepage conditions of n measuring points in the transverse direction h and the longitudinal direction z of the test road section by adopting a pavement water seepage instrument; driving the rainfall simulation device into a test road section; before testing, the rainfall simulation device is calibrated, the uniform spraying effect of the rainfall simulation device is ensured, the minimum rainfall intensity can be simulated and measured, and meanwhile all interfaces are checked to ensure tight connection; performing water seepage condition retest on the test road section by using a rainfall simulation device, and selecting m test points; and uniformly analyzing gap distribution of the test road section. According to the method, firstly, a road surface runoff scene can be truly simulated, the problem of lateral seepage interference is solved, the overall water seepage condition of a road section can be accurately evaluated, and the pavement water seepage qualification misjudgment rate is reduced; meanwhile, the construction segregation degree is revealed through the data difference between the water seepage instrument (point) and the rainfall simulation (surface). The method is high in operability, convenient to understand and real and reliable in data, and is a simple, convenient and visual test method.

The application discloses a rainfall simulation device and method for soil runoff leaching test, and relates to the technical field of soil hydrology and environmental simulation test, and comprises the following steps: obtaining three-dimensional scanning data of a test soil bed surface, and generating a digital elevation model covering the test soil bed surface and composed of multiple grid units; after depression filling treatment is performed on the digital elevation model, the theoretical water flow direction data and the theoretical confluence cumulative amount data of each grid unit are calculated by using a multi-flow direction algorithm. The application adjusts based on the dynamic feedback results of actual runoff data, is accurate in positioning the simulation error sources in the difference analysis link according to the infiltration capacity of different soils and the runoff collection characteristics of different surfaces, and then optimizes the identification precision of the catchment area and the runoff path through threshold adjustment, so that the adaptability in different soils and different surface states is improved.

The invention relates to the technical field of test devices, and discloses a device for simulating a karst slope complex rock habitat, which comprises a rock surface confluence simulation assembly, a karst rock-soil composite habitat simulation assembly, a rainfall simulation assembly and a multi-path runoff separation and collection assembly. Integrated simulation of three core characteristics of'complex rock distribution ', 'rainfall' and'rock surface flow 'of the karst slope is realized in one device for the first time, and the authenticity and scientificity of indoor experiments are greatly improved. Meanwhile, due to the unique design of the reconfigurable rock module, the coverage rate, the spatial configuration, the exposure mode and other key parameters of the rock can be flexibly adjusted, various habitats from simple to complex can be simulated, and the applicable research range is wide.

The invention belongs to the technical field of clothing performance detection, and discloses a clothing waterproof performance evaluation method and device, electronic equipment and a storage medium, and the method comprises the steps: placing a clothing supporting device wearing a to-be-detected clothing and an evaluation inner shirt in a rainfall simulation device, and adjusting the rainfall parameters of the rainfall simulation device to evaluate the waterproof performance of the to-be-detected clothing; natural rainfall phenomena with different rainfall intensities are simulated, and water seepage scores of the to-be-detected clothes under the natural rainfall phenomena with the different rainfall intensities are determined according to the water seepage conditions of the evaluation underwear and the to-be-detected clothes under the natural rainfall phenomena with the different rainfall intensities. By simulating a real wearing scene and a variable rainfall environment, the water seepage score is determined according to the water seepage conditions of the evaluation underwear and the to-be-tested garment, so that the waterproof performance of the garment is evaluated, and the evaluation efficiency of the waterproof performance of the garment is improved.

The invention discloses a landslide geological slope stability testing device and a using method, and relates to the technical field of slope stability testing devices.The landslide geological slope stability testing device comprises a base, and an angle adjusting mechanism, a testing box, at least one testing unit and a rainfall simulation mechanism are arranged on the base; the angle adjusting mechanism comprises a supporting driving assembly arranged on the base and a rotating assembly connected with the testing box, the supporting driving assembly is used for driving the testing box to rotate around a transverse axis so as to adjust the transverse gradient of the testing box, the testing unit comprises a gradient adjusting assembly and a slope simulation plate, the gradient adjusting assembly is arranged in the testing box, and the slope simulation plate is arranged in the slope adjusting assembly. The output end of the gradient adjusting assembly is connected with the side slope simulation plate and used for driving the side slope simulation plate to rotate around a longitudinal axis so as to adjust the longitudinal gradient of the side slope simulation plate, the rainfall simulation mechanism is arranged on the base, located above the test unit and used for spraying water to the side slope simulation plate, the structure is simple, use is convenient, the application range is effectively widened, and the test efficiency is improved. And the research efficiency is effectively improved.

This invention relates to the field of mine geological disaster control and geotechnical engineering testing technology, and particularly to a device and method for simulating and testing the seepage and particle migration of glacial till under rainfall conditions. The device includes a rainfall simulation mechanism, a glacial till seepage simulation mechanism, a seepage monitoring system, and a migration and seepage monitoring system. The glacial till seepage simulation mechanism includes a cylinder, and the monitoring end of the seepage monitoring system is located inside the cylinder. By setting up a rainfall simulation mechanism and a cylinder, and placing the monitoring end of the seepage monitoring system inside the cylinder, this invention allows the seepage monitoring system to monitor the seepage and moisture content changes of glacial till samples at different depths in real time. The migration and seepage monitoring system collects infiltrated water and migrating fine particles, enabling researchers to determine the rainwater infiltration situation of this type of glacial till sample and the migration pattern of fine particles under infiltration conditions based on the amount of water and fine particles collected by the migration and seepage monitoring system.

The invention relates to a bispectrum adaptive threshold feature selection method based on a random forest. The method comprises the following steps: obtaining feature importance scores through a random forest model; calculating a first-order derivative of the feature importance based on the feature importance score, constructing a gradient spectrum, and obtaining a threshold candidate point of the gradient spectrum; constructing a cumulative importance contribution spectrum of the features, and obtaining threshold candidate points of the cumulative importance contribution spectrum; and synthesizing threshold candidate points of the gradient spectrum and the cumulative importance contribution spectrum, evaluating each candidate threshold point by optimizing a fractional function, and determining an optimal feature. According to the invention, bispectrum feature selection is systematically applied in the field of rainfall simulation for the first time, intelligent feature screening of high-dimensional meteorological data is realized, and technical support is provided for refined meteorological forecast; the method can be directly integrated into an existing weather forecast service system, and through accurate feature selection, forecast precision is improved, disaster loss is reduced, computing resource consumption is reduced, operation cost is saved, and model deployment and maintenance efficiency is improved.

The application provides a visual device for simulating rainfall scouring of a slope under earthquake conditions, comprising: a vibration table for providing a vibration signal to simulate ground motion characteristics under earthquake action; an adjusting mechanism placed on the vibration table for providing different slope angles; a model box placed on the adjusting mechanism, the model box comprising an open-top box body with transparent side walls, which carries a slope model; a rainfall simulation assembly arranged at the open end of the top of the model box for simulating a natural rainfall environment; and a data acquisition and processing unit for collecting real-time change information inside and outside the slope model during the experiment, and analyzing response rules and instability evolution processes of the slope model under rainfall and / or earthquake action according to the collected data. The device has high structural integration, perfect functions, is suitable for slope response simulation under the coupling action of earthquake and rainfall, and has good visual effect and application promotion value.

The invention discloses an instability failure simulation method for a soft and hard interbedding counter-tilt slope under a rainfall condition, and relates to the technical field of rock mechanics and rock engineering. The method comprises the following steps: constructing an FDEM numerical model of a target soft and hard interbed counter-dip slope; setting boundary conditions for the numerical model, and applying initial gravity until a stress balance state is reached; based on the numerical model of stress balance, rainfall simulation is executed; according to a rainfall simulation result, judging whether slope instability failure occurs or not; if the slope instability failure does not occur and the load increasing condition is met, executing gravity load increasing simulation until the slope instability failure occurs while the rainfall simulation is maintained; and according to the critical gravity load when the slope is unstable, determining the slope safety coefficient of the target soft and hard interbed counter-tilt slope under the rainfall condition. According to the invention, fine simulation of the whole deformation and instability process of the soft and hard interbedding counter-dip slope under the rainfall condition can be realized.

The application belongs to the field of cold region track engineering and subgrade engineering, and specifically discloses a high-speed rail ballastless track-subgrade freezing characteristic simulation test device based on meteorological conditions in cold regions, which comprises a programmable high-low temperature test box for controlling the alternating change of environmental temperature, a rainfall simulation device for adjusting according to different rainfall in cold regions, a solar radiation simulation device for adjusting according to different illumination in cold regions, a ballastless track structure composed of unit block type structure, a subgrade structure composed of three-layer structure, and a data acquisition and monitoring module for monitoring and collecting deformation displacement, temperature, moisture and radiation data in real time. Through the device, real-time monitoring of relevant parameters such as the temperature of the high-speed rail ballastless track, deformation, the temperature of the subgrade, moisture and deformation in cold regions can be realized, the freezing depth of the subgrade and the contribution of each soil layer in frost heaving deformation can be determined, and the influence of the ballastless track on the freezing characteristics of the subgrade can be further analyzed.

The invention belongs to the technical field of artificial rainfall simulation, and particularly relates to a rainfall intensity adjusting and controlling system and device of an artificial rainfall device. According to the invention, through dynamic closed-loop control, each spraying unit can be adjusted in real time according to local monitoring data, drastic rainfall intensity fluctuation caused by non-uniform water power distribution of a pipe network is eliminated to the greatest extent, water pressure and flow of the spraying units and the whole simulated rainfall area are accurately regulated and controlled, and simulation distortion of the area rainfall process is avoided; meanwhile, unnecessary opening degree adjustment of a pump station and a valve is reduced, energy consumption is reduced, multi-stage modules are clear in labor division, initial regulation, water pressure compensation and dynamic fine adjustment are conducted, the rapid response and self-adaptive capacity is achieved, convergence to the target strength can be achieved in a short time, modular design is achieved, all subsystems are clear in responsibility, and the system is suitable for large-scale popularization and application. And flexible adjustment can be realized according to project scale or special requirements without large-scale overall transformation.