CN-122016572-A - Transparent soil experimental device

Abstract

The invention discloses a transparent soil experimental device, which relates to the technical field of soil experiments and comprises a transparent soil experimental platform, a seepage pressurizing module, a vertical pressurizing module, a camera shooting module and an information acquisition and processing module, wherein the transparent soil experimental platform comprises a base, a portal frame and a light source structure, a model box is arranged on the base, a transparent soil model is arranged in the model box, a cross beam is arranged above the portal frame corresponding to the model box, and the light source structure is arranged corresponding to the model box; the seepage pressurizing module is communicated with the model box, the vertical pressurizing module is arranged on the portal frame, and the camera shooting module is arranged on the side of the model box. The invention can truly reproduce complex stress states of the dam body under the combined action of the overlying load and the lateral head difference in projects such as water conservancy embankments and the like, and develop test researches aiming at the change of the geometric characteristics and the hydraulic characteristics of soil caused by the loss of fine particles under the coupling action of circulating seepage and stress.

Inventors

• WANG BIN
• WANG ZHEN

Assignees

• 中国科学院武汉岩土力学研究所

Dates

Publication Date

20260512

Application Date

20260306

Claims (10)

1. 1. The utility model provides a transparent soil experimental apparatus which characterized in that includes: The transparent soil experiment platform comprises a base, a portal frame and a light source structure, wherein a model box is arranged on the base, a transparent soil model is arranged in the model box, the portal frame is provided with a cross beam corresponding to the upper part of the model box, and the light source structure is arranged corresponding to the model box and used for polishing the transparent soil model; the seepage pressurizing module is communicated with the model box and is used for providing a horizontal seepage field for the model box; The vertical pressurizing module is arranged on the portal frame and is used for applying vertical load to the transparent soil model in the model box; the camera module is arranged at the side of the model box and is used for shooting an image of the transparent soil model; The information acquisition and processing module, the seepage pressurization module, the vertical pressurization module and the camera shooting module are all electrically connected with the information acquisition and processing module.
2. 2. The transparent soil experiment device according to claim 1, wherein a rigid loading block is arranged at the top of the transparent soil model, the vertical pressurizing module comprises a vertical pushing piece, the vertical pushing piece is arranged on the cross beam, the output end of the vertical pushing piece pushes the rigid loading block to be pressed down through a telescopic dowel so as to apply vertical load to the transparent soil model, a pressure sensor is arranged on the telescopic dowel, and the pressure sensor and the vertical pushing piece are electrically connected with the information acquisition and processing module.
3. 3. The transparent soil experiment device according to claim 2, wherein a displacement sensor is arranged on the vertical pushing piece or the cross beam, the displacement sensor is used for detecting vertical sedimentation of the transparent soil model, and the displacement sensor is electrically connected with the information acquisition and processing module.
4. 4. The transparent soil experiment device according to claim 1, wherein the model box comprises a water inlet side and a water outlet side, the seepage pressurization module comprises an oil storage box, an upstream oil delivery box, a downstream oil collection box and a water diversion assembly, the upstream oil delivery box is communicated with the oil storage box through a liquid inlet pipe, an oil inlet pump is arranged on the liquid inlet pipe, the upstream oil delivery box is communicated with the water diversion assembly, and the water diversion assembly is used for dividing liquid in the upstream oil delivery box into a plurality of branches and respectively communicated with the water inlet side, and the water outlet side is communicated with the downstream oil collection box.
5. 5. The transparent soil experiment device according to claim 4, wherein the water diversion assembly comprises a water diversion device and a plurality of water diversion pipes communicated with the water diversion device, the water diversion device is communicated with the upstream oil delivery box through an oil delivery pipe, a multifunctional valve is arranged on the oil delivery pipe and is used for cutting off the oil delivery pipe or adjusting the flow of the oil delivery pipe or stopping the oil delivery pipe, and the multifunctional valve can collect the flow and the flow rate of liquid flowing through the oil delivery pipe; and/or the upstream oil delivery tank is communicated with the oil storage tank through an overflow pipe, and the overflow pipe is used for controlling the liquid level in the upstream oil delivery tank to be kept at a preset height.
6. 6. The transparent soil experiment device according to claim 4, wherein liquid level sensors are arranged in the upstream oil conveying tank and the downstream oil collecting tank, and the two liquid level sensors are electrically connected with the information acquisition and processing module.
7. 7. The apparatus according to any one of claims 1 to 6, wherein the number of the light source structures is plural, light holes are formed in the base at positions corresponding to the bottom observation areas of the model boxes, at least one light source structure is disposed at the bottom of the model boxes and corresponds to the light holes, the rest of the light source structures are disposed on the portal frame and above the model boxes, and the light source structure comprises a driving assembly and a light source assembly connected with the driving assembly, and the driving assembly is used for driving the light source assembly to move relative to the model boxes.
8. 8. The apparatus according to claim 7, wherein a bottom rail is provided at a bottom of the mold box, the driving assembly includes a slider and a telescopic bracket, the slider of the light source structure at a top of the mold box is slidably connected to the cross beam, the slider of the light source structure at a bottom of the mold box is slidably connected to the bottom rail, the slider is connected to the light source assembly through the telescopic bracket, and the telescopic bracket is used for driving the light source assembly to move toward or away from the mold box.
9. 9. The transparent soil experiment device according to any one of claims 1 to 6, wherein the model box is made of transparent materials, the model box is divided into an upstream buffer zone, a middle experiment filling zone and a downstream monitoring collecting zone in sequence along the fluid flow direction in the model box, a liquid inlet buffer layer and a porous flow equalizing plate are arranged in the upstream buffer zone, the liquid inlet buffer layer is used for eliminating turbulence effect at a fluid inlet and dispersing pore water pressure, the bottom of the downstream monitoring collecting zone extends downwards to form a filter tank, a filter screen is arranged in the filter tank, the middle experiment filling zone is provided with a transparent soil model, a guide plate is arranged at a slope foot of the transparent soil model, a discharge end of the guide plate extends into the filter screen to receive and guide erosion and loss transparent soil particles, a hook is fixed on the cross beam, a tension sensor is hung at the lower end of the hook, the filter screen is connected with the tension sensor through a lifting rope, and the tension sensor is electrically connected with the information collecting and processing module and used for weighing the collected loss particles in real time.
10. 10. The apparatus according to any one of claims 1 to 6, wherein the top of the model box is provided with an opening, the transparent soil test platform further comprises an upper cover plate, the upper cover plate is adapted to the opening, a sealing lock catch is arranged on the periphery of the upper cover plate, the sealing lock catch is used for being matched with the edge of the opening to seal the model box, and a vacuum saturation interface is further arranged on the upper cover plate and is used for being communicated with external vacuumizing equipment to suck air from the model box.

Description

Transparent soil experimental device Technical Field The invention relates to the technical field of soil experiments, in particular to a transparent soil experiment device. Background The safety of water conservancy projects such as seawall, along river embankment and the like belongs to one of the most critical indexes. The engineering is in a complex hydrologic environment and under the action of frequent tides for a long time, and is extremely easy to generate water flow scouring and infiltration erosion, thereby inducing side slope instability and even structural dam break. The piping is an important cause of the damage of the internal structure of the embankment, and the exploration of the microscopic occurrence mechanism and evolution rule of the piping is of great significance to engineering disaster prevention. In recent years, a transparent soil model test technology is combined with a particle image velocimetry technology or a plane laser induced fluorescence technology, and by virtue of the advantages of non-invasive and full-field visualization, the transparent soil model test technology has become an important means for observing the seepage field in the soil body, capturing the migration track of fine particles and analyzing the evolution of pore channels in the geotechnical engineering field. However, the existing transparent soil experimental model is limited to single fluid seepage simulation, and cannot truly reproduce the complex stress state of the coupling of the upper load and the lateral water head difference in the dam engineering. And moreover, the measurable parameters are few, and the calculation accuracy of the simulation result is insufficient. Disclosure of Invention The invention mainly aims to provide a transparent soil experimental device, and aims to solve the problems that complex stress states of coupling of an upper load and a lateral water head difference in dam engineering cannot be truly reproduced, measurable parameters are few, and calculation accuracy of a simulation result is insufficient in the prior art. In order to achieve the above object, the present invention provides a transparent soil experimental apparatus, comprising: The transparent soil experiment platform comprises a base, a portal frame and a light source structure, wherein a model box is arranged on the base, a transparent soil model is arranged in the model box, the portal frame is provided with a cross beam corresponding to the upper part of the model box, and the light source structure is arranged corresponding to the model box and used for polishing the transparent soil model; the seepage pressurizing module is communicated with the model box and is used for providing a horizontal seepage field for the model box; The vertical pressurizing module is arranged on the portal frame and is used for applying vertical load to the transparent soil model in the model box; the camera module is arranged at the side of the model box and is used for shooting an image of the transparent soil model; The information acquisition and processing module, the seepage pressurization module, the vertical pressurization module and the camera shooting module are all electrically connected with the information acquisition and processing module. In an embodiment, the top of the transparent soil model is provided with a rigid loading block, the vertical pressurizing module comprises a vertical pushing piece, the vertical pushing piece is mounted on the cross beam, the output end of the vertical pushing piece pushes the rigid loading block to be pressed down through a telescopic dowel bar so as to apply vertical load to the transparent soil model, the telescopic dowel bar is provided with a pressure sensor, and the pressure sensor and the vertical pushing piece are electrically connected with the information acquisition and processing module. In an embodiment, a displacement sensor is disposed on the vertical pushing member or the cross beam, the displacement sensor is used for detecting vertical sedimentation of the transparent soil model, and the displacement sensor is electrically connected with the information acquisition and processing module. In an embodiment, the model case includes intake side and play water side, seepage flow pressurization module includes oil storage tank, upstream oil tank, low reaches oil collecting tank and water dividing assembly, upstream oil tank pass through the feed liquor pipe with the oil storage tank intercommunication, be provided with the oil feed pump on the feed liquor pipe, upstream oil tank with water dividing assembly intercommunication, water dividing assembly be used for with liquid in the upstream oil tank divide into a plurality of branches and respectively with intake side intercommunication, play water side with low reaches oil collecting tank intercommunication. In an embodiment, the water diversion assembly comprises a water diversion device and a plurality of water diver