284 results about "Rainfall simulation" patented technology

The invention discloses a system for testing a physical model for large-scale landslides under the action of multiple factors, which comprises a reservoir level fluctuation simulation unit, a landslide experiment slot section, an artificial rainfall simulation unit and a measuring unit, wherein the landslide experiment slot section comprises a horizontal slot section and a slope slot section, the horizontal slot section and the slope slot section are respectively paved with a slope body consisting of sand-soil mixtures, and the rear end of the horizontal slot section is hinged with the front end of the slope slot section; the slope slot section is composed of more than two slot sections which are sequentially hinged end to end, and the bottom of each slot section is provided with a lifting unit which can adjust the dip angle of the slot section; the rear end of the slope slot section is provided with a Malpighian-tube rear-edge water-replenishing unit; and the measuring unit comprises a deformation measuring part and a stress measuring part, wherein the deformation measuring part is used for measuring the deformation process of the slope body, and the stress measuring part is used for measuring the water pressure and water content of a pore of the slope body. By using the system disclosed by the invention, the changing regularity of each measurable physical quantity of a landslide in different development stages can be grasped accurately, thereby providing a possibility for better developing the studies on key parameters of landslides in different evolution stages.

The invention discloses a testing device and a testing device method for simulating collapse of tunnel surrounding rock under conditions of rainfall and underground water seepage. The testing device comprises a model testing box, a rainfall adjustable simulating system, an underground water seepage simulating system, an underground water supplying system, a water content testing system, a stress monitoring system, a digital radiography noncontact measuring system and an optical fiber bragg grating displacement monitoring system. By simulating a progressive failure process of tunnel weak broken surrounding rock under the action of seepage of surface water and underground water, mechanical behaviors of crushing the surrounding rock under different rainfall conditions and different underground water seepage path conditions are quantitatively researched. By obtaining multiple-physical field information in a tunnel surrounding rock collapse process, multi-information features in different evolutionary phases and internal links of information of all fields of the collapse are analyzed, a progressive failure process and fracture morphology and ranges of the tunnel weak broken surrounding rock under different factors are determined, and the effective basis is provided for disclosing a progressive failure principle and a dynamic pressure arch effect of the weak broken surrounding rock under conditions of rainfall and underground water seepage.

The invention relates to a slope water-soil loss experiment device and method under combined extreme meteorological conditions. The experiment device comprises an experiment table, a combined extreme environment simulation unit and a control system unit, wherein the experiment table comprises a bottom base, a slope base plate, a downstream baffle plate, soil block standard elements and an experiment table regulating device; the combined extreme environment simulation unit comprises a rainfall simulation device, an air field simulation device, a freezing rain simulation device, a snowfall simulation device, a sunlight simulation device, an air temperature simulation device and an overland flow simulation device; the control system unit comprises a power supply system, a water supply system and a signal acquisition and processing system. According to the invention, the slope water-soil loss experiment device and method under combined extreme meteorological conditions perform indoor simulation and measurement of a slope water body loss situation under a single or combined extreme meteorological conditions of rain storm, rain and snow, freezing rain, flood, drought, high temperature and the like, can achieve accurate and reliable results, and can be widely applied to water-soil loss monitoring, principle analysis and governance under complex variable meteorological conditions.

The invention relates to a testing device for researches on a covered karst collapse process mechanism under influence of a hydraulic condition. The device comprises a water level control unit, an artificial rainfall simulation unit, a testing unit and an intelligent monitoring unit, wherein the water level control unit is used for controlling a pressure water head and a phreatic water level of the testing unit in a testing process; the artificial rainfall simulation unit is used for simulating rainfall by virtue of a peristaltic pump; the testing unit is used for covered karst collapse testing; the intelligent monitoring unit is used for monitoring the water pressure, soil pressure, displacement and surface deformation of a soil body of a cover layer in the testing unit and particle sizes and concentration of particles in case of damage to the soil layer. The testing device is applied to tests in researches on a covered karst collapse formation processing mechanism under a complex groundwater boundary condition, and is higher in stability, and meanwhile, testing equipment is simplified, and testing cost is reduced. By the device, the whole covered karst collapse process can be visually observed to fulfill the aim of deeply exploring the covered karst collapse mechanism.

The invention discloses a multifunctional unsaturated soil permeameter and a testing method thereof. The permeameter comprises a first bracket, a second bracket, a water supplementing device which is fixed on the first bracket and can perform up-and-down adjustment, and a soil sample permeation device which is fixed on the second bracket and can perform up-and-down adjustment, wherein the water supplementing device and the soil sample permeation device can be combined to form an underground water level rise simulation device, a flooding simulation device or a rainfall simulation device. The testing method comprises the following steps of: 1, performing underground water level rise, flooding and rainfall simulation tests, namely respectively performing the underground water level rise, flooding and rainfall simulation tests on the same tested soil sample by employing the underground water level rise simulation device, the flooding simulation device and the rainfall simulation device; 2, performing test data arrangement, and acquiring a permeation characteristic testing result of the tested soil sample. The multifunctional unsaturated soil permeameter is reasonable in design, low in investment cost, simple in operation, convenient in realization and good in using effect and can simply and rapidly finish the permeation characteristic testing process of unsaturated soil.

The invention relates to a side slope rainfall simulation testing apparatus. The side slope rainfall simulation testing apparatus is composed of a side slope model, a simulated rainfall device, an underground water level simulation system, a heating-chilling integrated air supplying system and a mechanical loading mechanism, wherein the side slope model is arranged in a model box body, the model box body is of rectangular shape with an opening upside, the simulated rainfall device is arranged at the upper part of the model box body and is provided with a plurality of rainfall pipes arranged together, a plurality of nozzles are formed at the bottom of each rainfall pipe and water flows are sprayed out through the nozzles; the underground water level simulation system is composed of the model box body with a porous flexible pipe network, a grid screen and a water drainage pipe network, and is used for simulating the influence of the fluctuation of underground water level on the slide slope model; the mechanical loading mechanism is composed of a stress application plate and a hydraulic jack; and the heating-chilling integrated air supplying system is arranged at the circumferential side of the top part, the bottom part and the periphery of the model box body. The side slope rainfall simulation testing apparatus has simple testing behavior process, can be applied to most of side slope conditions, has low requirements on area size and clearance, and is good in self-stability, moderate in size and convenient for transportation.

A rainfall simulation apparatus for a structure is provided, comprising a water source, an electric pump, a vertically oriented riser pipe, a perforated header pipe along the roof of the structure, a V-shaped aperture-containing trough connected to the roof, and an elongated collection bin below the trough and connected to the pump. The rainfall simulation apparatus has particular utility in connection with providing the relaxing acoustic effect of rainfall on a structure while additionally providing the visual effect of rainfall through the windows of the structure.

The invention discloses an indoor rainfall infiltration test simulation system. The indoor rainfall infiltration test simulation system comprises a support, an indoor rainfall simulation system, a soil slope seepage simulation system and a measuring system; the indoor rainfall simulation system comprises a base, a bracket and a test trough, and a soil groove, a bottom seepage collection groove, a side seepage collection groove and a runoff collection groove are formed in the test trough; the base is provided with a hinge support and a pin support, the hinge support is connected with the base in a sliding manner, the support is provided with pin holes which are sequentially distributed from bottom to top, and the hinge support is fixedly connected with the base; the test trough is fixed on the bracket, and one side, which is provided with the runoff collection groove, of the test trough is adjacent to the hinge support. By adopting the indoor rainfall infiltration test simulation system, a water transfer form and a variation rule of various physical quantities in the rainfall infiltration process in different soil textures under different slopes and different rainfall intensities can be researched.

The invention relates to a system for simulating the regional rainfall process, which comprises a hydro-meteorological database, a rainfall process generation subsystem, a rainfall process control subsystem and a rainfall simulation subsystem, and further comprises a regional climate model database, a station information database, a regional climate model, a station information interpolation device, a scale transformation device, a water spray control device, a water supplying device, a spray device, and a sensor mounted on a regional physical model, wherein spray units are arranged crosswise to form a spray unit array. Through the integration of the hydro-meteorological database, the rainfall process generation subsystem, the rainfall process control system and the rainfall simulation units, the generation and the simulation of the past, present and future rainfall processes in the designated area are achieved. The natural rainfall process can be better simulated, and the system has an important scientific research value in the fields of the watershed runoff generation and flow routing process, the research on hydrology and water resources in the lack-data watershed, the inspection and the optimization of the hydrographic station net arrangement, and the intelligence watershed research, and provides a scientific tool for simulation study and application of the regional hydrology.

The invention relates to a side slope mining model testing device and method under the action of surface and underground water, which can effectively meet experiment requirements, improve experimental efficiency and greatly facilitate experimental operation and is high in comprehensiveness. The device comprises a vertical baffle wall with holes and a vertical side slope base plate with holes; the side slope base plate with holes is arranged on a device base; a steel frame is arranged outside the vertical baffle wall with holes and the vertical side slope base plate with holes; visible glass is installed around the steel frame; a lane opening is formed in the front side of the steel frame; side slope soil is arranged inside a space formed by the whole steel frame; a vertical counter force rack is installed on the outer side of the steel frame; a rainfall simulation device is installed at the upper part of the vertical counter force rack; a ground stress simulation jack is further arranged on the inner side of the vertical counter force rack; the vertical baffle wall with holes and the side slope base plate with holes are respectively connected with a corresponding lifting water supply device; and the steel frame and the vertical baffle wall with holes are respectively connected with a support device.

The invention provides a wind blowing and precipitation system, which is used for airplane windscreen rain removal system tests. The wind blowing and precipitation system comprises a wind blowing system, a precipitation system and a measurement and control system, wherein the wind blowing system adopts a straight-flow low-speed wind tunnel and a variable-frequency fan is arranged in the wind tunnel; the precipitation system comprises a water pump and a precipitation device, the water pump delivers tap water to the precipitation device, the precipitation device comprises a frame and a wing-shaped plate installed in the frame, a plurality of nozzles are arranged at the rear edge of the wing-shaped plate, and the spray direction of the plurality of nozzles is in parallel with the chord length direction of the wing-shaped plate; the measurement and control system comprises a wind speed sensor, a rainfall sensor and a controller, wherein the controller adjusts the frequency of the variable-frequency fan to adjust wind speed according to the feedback of the wind speed sensor and adjusts the revolving speed of the water pump to adjust rainfall according to the feedback of the rainfall sensor. The invention further provides a rainfall simulation method using the wind blowing and precipitation system.

The invention provides an urban accumulated water prediction and safety early warning system based on a flood drainage model. The urban accumulated water prediction and safety early warning system combines the flood drainage model, weather forecast, an accumulated water on-line monitoring system and a decision support system, and achieves support for urban accumulated water prediction and safety early warning. The urban accumulated water prediction and safety early warning system comprises the following steps: (1) combining a pipe network model with a production and confluence model to construct a flood drainage model; (2) depending on a flood drainage model, performing multi-scenario rainfall simulation and warehousing; (3) collecting and reporting real-time rain condition data; (4) calling a multi-scene rainfall bank; and (5) carrying out online prediction and safety early warning on road ponding. The urban accumulated water prediction and safety early warning system based on a flooddrainage model can effectively, accurately and dynamically forecast the flood prevention and drainage conditions of urban ponding-prone points in real time, and can facilitate decision support of a management department.

The invention discloses an indoor artificial rainfall-simulation testing system. The indoor artificial rainfall-simulation testing system is mainly composed of a water supply system, a rainfall simulator, a test chamber and a water sampling device, wherein the water supply system is mainly composed of an artificial rainwater storage water tank, a flow sensor, a submersible pump, an air-operated thin film regulating valve and a water duct; the rainfall simulator is mainly composed of a rainfall support, a micro sprinkler and a universal pipe; the testing chamber is composed of a testing chamber body, a humidity sensor, an air pressure sensor, a temperature sensor and a stainless steel drain pipe; the water sampling device is composed of a stainless steel drain pipe, a funnel-shaped liquid collector and a manual water valve. The indoor artificial rainfall-simulation testing system is used for indoor rainfall simulation, for weather and rainfall characteristics of different areas, through a Chicago rainstorm process curve model and different spray head combining forms, the control and change of rainfall intensity in time and space can be achieved, and the rainfall intensity can be recorded in real time.

The invention relates to a model testing device for an influence caused by a tunnel passing through a landslide mass under a rainfall condition. A model box is filled with clay to form a sliding bed which is downward from the left side to the right side; a sliding mass is arranged in the sliding bed; a tunnel lining model is horizontally placed inside a soil mass in the model box; a tunnel excavation construction simulation device is arranged in the tunnel lining model which is partitioned into a plurality of sections of tunnels; two resistance strain gauges are horizontally stuck to the inside of each section of tunnel; resistance wires with the same length are wound inside each section of tunnel and are connected with controllers through conductors; each section of tunnel is filled with paraffin; dial indicator probes are respectively fixedly arranged in an upper soil mass and a lower soil mass of the tunnel lining model and on the surface of the sliding mass and are connected with dial indicators through pre-embedded slim aluminum alloy tubes and flexible steel wire filaments arranged inside the pre-embedded slim aluminum alloy tubes; the upper end of the model box is provided with a rainfall simulation device comprising a plurality of displacement meters, a water inlet valve and a water outlet valve; and each displacement meter is fixedly arranged on the surface of the soil mass, the inside of the soil mass and the top of the tunnel through a displacement meter bracket.

The invention provides a rainfall simulation system, comprising a water supply system, a pressure system, a rainfall device and a model box, wherein the water supply system replenishes water for the rainfall device; the pressure system controls the pressure in the rainfall device; the width of the rainfall device is greater than that of the model box; the model box is provided with a side wall cut to be side slope-shaped. The width of the rainfall device is much greater than that of the model box, so that even the rainfall deflection of the rainfall device is relatively large, the side slope surface of the model box can receive the rain completely. The organic glass sidewall of the model box is cut to be side-shaped so as to prevent the blockage for two sidewalls when the rain has inclination in the falling process, thus the surface of the side slope receives the rain uniformly. Furthermore, the U-shaped groove cut on the top inner side of the organic glass sidewall on two sides of the model box leads the fallen rain to flow to the outside of the model box along the groove other than the side slope.

The invention provides a multifunctional geotechnical model testing system and method and relates to a geotechnical model testing system and method, aiming at solving the problem that an existing model box cannot simulate conditions of a temperature field. The multifunctional geotechnical model testing system comprises an outer framework, the model box, a rainfall simulation mechanism, a refrigerating mechanism, a heating mechanism and a data acquisition system, wherein the model box is mounted on the outer framework; a water outlet of the rainfall simulation mechanism is arranged at the top of the model box; the refrigerating mechanism and the heating mechanism can provide environment temperature to the model box; the data acquisition system is used for acquiring frozen soil working condition indexes in the model box. The method comprises the following steps: 1, determining the size and the model similarity ratio of the model box and the length and the slope ratio of a roadbed model;2, preparing a soil body material for simulation; 3, establishing a corresponding simulation procedure; 4, acquiring and displaying data. The multifunctional geotechnical model testing system and method are used for a frozen soil test.

A portable artificial rainfall simulation device is composed of a water power device, a rainfall shower, a bracket, a quadrat device and a soil water monitoring device. The rainfall shower is fixed on the top of the bracket and is placed right over the quadrat device; the rainfall shower is connected to a pressure meter, a flowmeter, an artificial pressure pump and a bucket in the water power device through a water pipe of the water power device; a quadrat frame in the quadrat device is embedded into a soil quadrat; the quadrat frame has three closed faces, and one opening face in seamless integration with a collecting groove in the device; a rain cover completely covers the collecting groove; a counting cup is below a water outlet end of the collecting groove; a soil water sensor in the soil water monitoring device is connected with an HOBO collector in the device through a network port type socket; and the HOBO collector and a notebook computer are connected through an HOBO data line. The portable artificial rainfall simulation device has scientific design and simple structure, and enhances adaptability of the device in field, thus providing technical guarantee for conducting a large number of experiments and acquiring experimental data in the field.

The invention relates to a slope instability physical model test device under joint action of rainfall and traffic vibration. The device comprises a model test box with openings in the top and one side, an artificial rainfall simulation unit for providing rainfall, a kinematic simulation unit for outputting a traffic vibration load, a monitoring unit for tracking a slope instability process, and acontrol unit, wherein the artificial rainfall simulation unit is located above the model test box; the kinematic simulation unit is located at the bottom of the model text box; the artificial rainfall simulation unit, the kinematic simulation unit and the monitoring unit are all electrically connected with the control unit. The device can simulate a slope instability evolution rule under single action, mutual action and coupled action of the rainfall and the traffic vibration, and also can carry out a synchronous comparison test on slope instability evolution through multiple combinations. The slope instability physical model test device has the beneficial effects of simple structure, simplicity and convenience in operation and multifunctionality, and provides a certain guidance effect for pre-warning of landslide hazards and prevention and treatment of projects.

The invention relates to a needle-type simulated rain device and a method for simulating rainfall thereof. The simulated rain device includes a rain device and a water supply device, wherein the rain device includes a frame, a transmission device and a rain collection box; the frame has two vertically connected frames; the transmission The device includes two identical sub-transmission systems fixed on the two frames; the rain collection box is a sealed cuboid, and two adjacent sides are connected to the two sub-transmission devices. The upper end of the rain collection box is equipped with a reactor, and the lower The end face is connected with a plurality of raindrop generators. The water supply unit includes a peristaltic pump. The present invention can fine-tune the size of raindrops, conveniently control the range of rain intensity and rainfall height, and is convenient to install and adjust the needle-type rainfall device indoors and outdoors, and is used for studying rainfall characteristic parameters such as raindrop diameter, rain intensity, raindrop terminal velocity, and raindrop kinetic energy.

The invention discloses a large-sized previous concrete blocking simulation device and a retained particle measuring method and belongs to the field of perviousness test for pervious concrete. The large-sized previous concrete blocking simulation device comprises a fixing support, a blocking simulation sample box, a rainfall simulation device and a surface runoff simulation device; the rainfall simulation device and the surface runoff simulation device are utilized to simulate dust particle retention in a previous concrete sample under rainfalls different in strength and pavement runoffs; thesimulated conditions are closer to that of a real service scene of a pervious pavement; the real conditions of the pervious concrete pavement can be better simulated; a cylindrical small sample is utilized to collect retention data of the particles in the pervious concrete; the influences upon pervious concrete pore blocking from the factors, such as different rainfall strengths, pavement runoff strengths and quantity of rainfalls can be simulated; accuracy of the pervious concrete blocking test is improved; the device herein has the advantages of simple structure, good operational convenience, good test data accuracy and the like.

The invention discloses a needle-socket type anti-blocking artificial field rainfall simulation device. The device is composed of an artificial rainfall device, a raininess test device and a lifting type rainfall machine needle dredging device; with the lifting type rainfall machine needle dredging device, a needle does not need to be pulled out to clean by an iron wire after each rainfall, the cleaning process of the needle is time-saving and labor-saving, the permeability of the needle of a rainfall machine is guaranteed, and stable raininess is provided for an experiment. Furthermore, a whole bottom plate is divided into parts through a needle distribution plate at the bottom of an artificial rainfall machine water tank, and a whole line of needles can be fast replaced by replacing needle distribution plates on which needles of different specifications are distributed, thereby achieving the aim of fast regulating different raininess according to experiment demands, and simplifying the process of replacing the needles while regulating the raininess. Therefore, the needle-socket type anti-blocking artificial field rainfall simulation device disclosed by the invention is excellent in experimental result, and can be widely applied to the artificial field rainfall simulation.

The invention discloses a slope scouring simulation test device which comprises a slope simulation device and a rainfall simulation device, wherein the slope simulation device comprises a panel groove, and the panel groove is provided with an angle indicator I; the rainfall simulation device comprises sprayers, a spraying tank, an angle indicator II, a support arm I and a support arm II, the sprayers are evenly distributed on the spraying tank, the axis of a water outlet hole of the sprayer is perpendicular to the surface of the spraying tank, and the angle indicator II is installed on the spraying tank; the support arm I is of a telescopic structure, one end of the support arm II is hinged with the support arm I, and the other end of the support arm II is hinged with the spraying tank; a lifting device I and a pushing device are connected on the support arm II, the lifting device I supports the support arm II to elevate the height of the support arm II, and the spraying tank is pushed by the pushing device to move forward and backward to regulate the angle between the spraying tank and the horizontal plane. Researches are conducted on the slope scouring performances at different rainfall angles, more sufficient test evidences are provided for the design and construction of a roadbed slope structure, and the slope scouring simulation test device is more beneficial to slope treatment.

The invention discloses an aircraft test system and a test method for simulating a flight environment. The system comprises a simulation cabin, a simulated aircraft, terminal equipment, a controller,a vibration sensor, a processor, a display, sand and dust simulation equipment, rainfall simulation equipment and strong wind simulation equipment. The simulated aircraft, the sand and dust simulationequipment, the rainfall simulation equipment and the strong wind simulation equipment are all arranged in the simulation cabin. When the simulated aircraft flies in a raining simulated environment, areal raining environment is provided for the simulated aircraft. In this way, a tester can conveniently judge the influence of the real environment on the simulated aircraft in the flight process. When the simulated aircraft flies in a strong wind simulation environment, the real strong wind weather is provided for the simulated aircraft. By simulating multiple real flight environments, the shaking condition test of the simulated aircraft in the flight process is comprehensively judged. As a result, the tested structure is more specific, more accurate and more representative.

The invention relates to an intelligent outdoor artificial rainfall simulation device which comprises a control end, a water conveying system, a rain dropping machine and a group of rain gauges arranged within a rain dropping range of the rain dropping machine, wherein the control end is used for setting rainfall experiment parameters, sending a control instruction to the rain dropping machine and the water conveying system, and acquiring data of the rain gauges; the water conveying system comprises a water tank, a water pump and a water conveying pipe; one end of the water conveying pipe is connected with the water pump, and the other end of the water conveying pipe is connected with the rain dropping machine; the rain dropping machine comprises a pipe rack; the pipe rack is a cubic framework consisting of two steel pipe vertical columns and surrounding steel pipe transverse columns; rain dropping sprayers are mounted at the four corners of the upper end of the cubic framework; first signal receiving ends are mounted on the rain dropping sprayers; and the rain gauges are used for transmitting the acquired rainfall data to the control end. The intelligent outdoor artificial rainfall simulation device has the advantage of convenience in assembling and disassembling; furthermore, a rainfall experiment is simpler, and the experiment cost is reduced; meanwhile, experiment data can be continuously measured, recorded and processed in real time, and the accuracy and the effectiveness of the rainfall experiment are guaranteed.