Visualized soil pressure seepage test device

Abstract

The utility model provides a kind of soil visible pressurized seepage test device, including water device and monitoring device, water device includes water storage tank, water pump connected with water storage tank by water delivery pipe, transparent soil sample chamber communicated with water pump by inlet pipe, and drainage pipe and water system controller are communicated with the top of transparent soil sample chamber, inlet pipe is connected with tracer delivery opening, monitoring device includes vertical cavity surface laser, electric control slide rail with the horizontal motion of vertical cavity surface laser, slide rail controller, L type connecting rod is connected with the base of vertical cavity surface laser, high-speed camera is fixed on L type connecting rod, high-speed camera is connected with data processor by camera data line, and optical filter is installed before high-speed camera.The utility model is to realize under the condition of different water pressure of soil, real-time monitoring seepage path in soil sample under pressurized seepage condition.

Description

Technical Field

[0001] This utility model belongs to the field of pressurized seepage testing in geotechnical engineering, and specifically relates to a soil visualization pressurized seepage testing device. Background Technology

[0002] Soil is a relatively loose medium. Under the influence of a hydraulic head difference, water flows from the side with a higher hydraulic head through the pores of the soil to the side with a lower hydraulic head. In practical engineering, soil layers or building foundations are easily affected by seepage. The internal stress state of the soil, as well as the structure and strength of the foundation itself, will change under seepage, affecting the stability of the building or foundation and posing a serious threat to engineering safety.

[0003] Seepage tests can realistically reflect the complex multiphase seepage characteristics of fluids in the three-dimensional structure of underground pores and fissures. Understanding the seepage path of water in soil is crucial for studying various hydraulic factors affecting soil safety (including head, velocity, pore water pressure, hydraulic gradient, seepage force, and seepage flow rate). However, soil is not a transparent structure, and traditional seepage tests often require techniques such as CT scans and nuclear magnetic resonance to visualize the seepage process. These methods are cumbersome and the equipment is expensive. Therefore, this invention proposes a low-cost, simple, and practical soil visualization pressurized seepage test device and method. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a device capable of real-time monitoring of the water movement trajectory in soil under dynamic water pressure. This device can accurately perform the following test procedures: after installing and adjusting the monitoring device, maintaining a constant dynamic water pressure after the soil sample is installed, adding a tracer after the soil sample is saturated, and using a vertical cavity laser, high-speed camera, and data processor for real-time monitoring. The test process is automated, the method is simple to operate, and the monitoring is convenient, practical, and fast.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A soil visualization pressurized seepage test device includes a dynamic water device and a monitoring device. The dynamic water device includes a water storage tank, a water pump connected to the water storage tank via a water supply pipe, a transparent soil sample chamber connected to the water pump via an inlet pipe, a drain pipe connected to the top of the transparent soil sample chamber, and a dynamic water system controller. The inlet pipe is connected to the bottom of the transparent soil sample chamber, the drain pipe is connected to the water storage tank, a tracer dosing port is connected to the inlet pipe, a first solenoid valve is installed at the water pump outlet, and a second solenoid valve is installed between the tracer and the inlet pipe.

[0007] The monitoring device includes a vertical cavity surface laser (VCSEL), an electrically controlled slide rail that drives the VCSEL to move horizontally, a slide rail controller, an L-shaped connecting rod connected to the VCSEL base, and a high-speed camera fixed on the L-shaped connecting rod. The high-speed camera is connected to a data processor via a camera data cable, and a filter is installed in front of the high-speed camera. The VCSEL is located directly in front of the transparent soil sample chamber, and the high-speed camera is located on the side of the transparent soil sample chamber. The dynamic water system controller is connected to the water pump, the first solenoid valve, and the second solenoid valve.

[0008] Preferably, the transparent soil sample chamber includes an open, bottomless glass box, a waterproof base plate, and a waterproof top plate. The lower end of the transparent soil sample chamber is sealed to the waterproof base plate with a water inlet and perforations via rubber gaskets. The upper end of the transparent soil sample chamber is sealed to the waterproof top plate with a drainage outlet and perforations via rubber gaskets. The waterproof top plate and the waterproof base plate are fixed by vertical support rods with threads at both ends that pass through the perforations and self-locking nuts screwed onto both ends of the vertical support rods.

[0009] Preferably, both the inlet pipe and the outlet pipe include multiple parallel branch pipes, which are distributed at equal intervals on the diagonal lines of the waterproof base plate and the waterproof top plate, and the straight line connecting the branch pipes of the inlet pipe is perpendicular to the straight line connecting the branch pipes of the outlet pipe.

[0010] Preferably, it also includes an uncovered glass box, a transparent soil sample chamber located in the middle of the uncovered glass box, vertical support rods fixed to the bottom four corners inside the uncovered glass box, a through hole at the bottom of the uncovered glass box for the water inlet pipe to pass through, and a dynamic water system controller located on the lower surface of the uncovered glass box.

[0011] Preferably, the diameter of the tracer inlet is larger than the diameter of the pipe opening below the inlet.

[0012] Compared with existing testing devices, this invention has the following advantages:

[0013] (1) This utility model can simulate soil seepage under different conditions by setting the dynamic water pressure and water flow speed through the dynamic water system controller. In specific use, the liquid is pumped from the water storage tank by the water pump and transported to the transparent soil sample chamber to saturate the sample. Then, the first solenoid valve is closed, the second solenoid valve is opened, a certain amount of tracer is poured in, the second solenoid valve is closed, the first solenoid valve is opened to allow the fluorescent tracer to flow into the soil sample, and then the electric control slide rail is opened to allow the vertical cavity laser to move on the electric control slide rail at the set moving speed and moving mode. The laser scanning surface scans each cross section of the soil sample, and at the same time, the high-speed camera is turned on to capture the specific light emitted after the fluorescent solution in the soil is excited. Real-time observation of the movement of water in the soil under saturated dynamic water pressure is achieved by repeatedly scanning back and forth.

[0014] (2) The transparent soil sample chamber of this utility model is set in an open glass box. The laser emitted by the laser completely scans the cross section of the soil sample. The upper and lower ends are enclosed by a water-proof top plate and a water-proof bottom plate. Multiple microporous filter membranes are laid at the upper and lower ends of the soil sample to ensure that the soil particles are not washed away by the water flow and to ensure that the fluorescent tracer molecules can pass through the filter membrane into the soil sample normally. The straight line connecting the water inlet pipe and the water outlet pipe is perpendicular to the opposite plane to ensure that the dynamic water pressure of the soil sample is the same in the vertical direction. Attached Figure Description

[0015] Figure 1 This is a front view of the device for real-time monitoring of water movement trajectory in soil under hydrodynamic pressure according to this utility model;

[0016] Figure 2 This is a top view of the dynamic water device in the device for monitoring the movement trajectory of water in soil under dynamic water pressure provided by this utility model.

[0017] In the diagram: 1-Rubber gasket, 2-Multilayer microporous filter membrane, 3-Waterproof top plate, 4-Self-locking nut, 5-Drainage pipe, 6-Vertical support rod, 7-Open glass box, 8-Transparent soil sample chamber, 9-Soil sample, 10-Tracer inlet, 11-Water inlet pipe, 12-Dynamic water system controller, 13-Water storage tank, 14-Slide rail controller, 15-Electrically controlled slide rail, 16-Vertical cavity laser, 17-Water pump, 18-First solenoid valve, 19-Second solenoid valve, 20-Data processor, 21-Filter, 22-High-speed camera, 23-L-shaped connecting rod, 24-Water supply pipe, 25-Waterproof bottom plate, 26-Camera data cable. Detailed Implementation

[0018] To clearly illustrate the beneficial effects of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. Specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0019] An embodiment of a soil visualization pressurized seepage test apparatus, such as Figure 1 , Figure 2 As shown, the device includes a water-moving device and a monitoring device. The water-moving device includes an open glass box 7, a water tank 13, a water pump 17 connected to the water tank via a water supply pipe 24, a transparent soil sample chamber 8 connected to the water pump via an inlet pipe 11, a drain pipe 5 connected to the top of the transparent soil sample chamber, and a water-moving system controller 12. The inlet pipe is connected to the bottom of the transparent soil sample chamber, and the drain pipe is connected to the water tank. A tracer inlet 10 is connected to the inlet pipe. A first solenoid valve 18 is installed at the water pump outlet, and a second solenoid valve 19 is installed between the tracer and the inlet pipe. The transparent soil sample chamber is located in the middle of the open glass box.

[0020] In this embodiment, the transparent soil sample chamber includes an open, bottomless glass box, a waterproof base plate 25, and a waterproof top plate 3. The lower end of the transparent soil sample chamber is sealed to the waterproof base plate 25, which has a water inlet and perforations, via a rubber gasket 1. The upper end of the transparent soil sample chamber is sealed to the waterproof top plate 3, which has a drain outlet and perforations, via a rubber gasket 1. The waterproof top plate and waterproof base plate are fixed by vertical support rods 6 with threads at both ends, which pass through the perforations, and self-locking nuts 4 screwed onto both ends of the vertical support rods. Both the water inlet pipe and the water outlet pipe include multiple parallel branch pipes, which are equally distributed on the diagonals of the waterproof base plate and the waterproof top plate. The straight line formed by the branch pipes of the water inlet pipe is perpendicular to the straight line formed by the branch pipes of the water outlet pipe. The vertical support rods 6 are fixed to the four bottom corners inside the open glass box. The bottom of the open glass box has through holes for the water inlet pipe to pass through. The dynamic water system controller 12 is located on the lower surface of the open glass box. In this embodiment, the diameter of the tracer inlet is larger than the diameter of the pipe below it. This allows for more efficient distribution and control of the tracer flow rate, increasing the speed at which the tracer flows into the water inlet channel. The second solenoid valve is opened via the water flow system controller, allowing the fluorescent tracer to flow into the water inlet channel and mix thoroughly with the water.

[0021] The monitoring device includes a vertical cavity surface laser (VCSEL) 16, an electrically controlled slide rail 51 that drives the VCSEL horizontally, a slide rail controller 14, an L-shaped connecting rod 23 connected to the VCSEL base, and a high-speed camera 22 fixed on the L-shaped connecting rod. The high-speed camera is connected to a data processor 20 via a camera data cable 26. A filter 21 is installed in front of the high-speed camera. The VCSEL is located directly in front of the transparent soil sample chamber, and the high-speed camera is located on the side of the transparent soil sample chamber. The dynamic water system controller 12 is connected to a water pump 17, a first solenoid valve 18, and a second solenoid valve 19. The electrically controlled slide rail is existing technology. In this embodiment, the electrically controlled slide rail is a lead screw and nut structure. The VCSEL base is fixed on the lead screw and nut, and a guide rod is arranged parallel to one side of the lead screw and nut. The VCSEL base and the guide rod are guided and engaged. The slide rail controller can control the electric slide rail to move back and forth, so as to realize the repeated scanning of various cross sections of soil sample 9 in the soil sample chamber by the surface laser. At the same time, the two-dimensional planar image captured and recorded by the high-speed camera is reconstructed by the data processor to obtain a three-dimensional image, so as to realize the real-time observation of the pressurized seepage of the soil.

[0022] The soil visualization pressurized seepage test device of this embodiment can simulate soil seepage under different conditions by setting the dynamic water pressure and water flow velocity through the dynamic water system controller. In specific use, the liquid is drawn from the water storage tank by the water pump and transported to the transparent soil sample chamber to saturate the sample. Then, the first solenoid valve is closed, the second solenoid valve is opened, a certain amount of tracer is poured in, the second solenoid valve is closed, the first solenoid valve is opened to allow the fluorescent tracer to flow into the soil sample, and then the electrically controlled slide rail is opened to move the vertical cavity laser on the electrically controlled slide rail at the set moving speed and moving mode. The emitting surface laser scans each cross section of the soil sample, and at the same time, the high-speed camera is activated to capture the specific light emitted after the fluorescent solution in the soil is excited. By repeatedly scanning back and forth, real-time observation of the movement of water in the soil under saturated dynamic water pressure is achieved.

[0023] The transparent soil sample chamber and the uncovered glass box allow laser penetration. The surface laser emitted by the laser completely scans the cross-section of the soil sample, exciting an aqueous solution containing a fluorescent tracer in one section of the soil sample. The surface laser emitted by the vertical cavity laser completely covers the soil sample installed in the soil sample chamber from top to bottom. The upper and lower ends of the transparent soil sample chamber are enclosed by a water-proof top plate and a water-proof bottom plate. Multiple layers of microporous filter membranes are laid at the upper and lower ends of the soil sample to ensure that soil particles are not washed away by the water flow and that the fluorescent tracer molecules can pass through the filter membrane normally into the soil sample. The straight line connecting the water inlet and outlet pipes is perpendicular to each other to ensure that the dynamic water pressure of the soil sample is the same in the vertical direction.

[0024] The technical solution of this embodiment provides a hardware foundation for the above process and a system guarantee for the implementation of the process.

[0025] The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art to which this invention pertains may make any modifications, additions, or equivalent substitutions to the described embodiments without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A soil visualization pressurized seepage test device, comprising a dynamic water device and a monitoring device, characterized in that: The dynamic water device includes a water storage tank, a water pump connected to the water storage tank via a water supply pipe, a transparent soil sample chamber connected to the water pump via an inlet pipe, a drain pipe connected to the top of the transparent soil sample chamber, and a dynamic water system controller. The inlet pipe is connected to the bottom of the transparent soil sample chamber, the drain pipe is connected to the water storage tank, a tracer dosing port is connected to the inlet pipe, a first solenoid valve is installed at the water pump outlet, and a second solenoid valve is installed between the tracer and the inlet pipe. The monitoring device includes a vertical cavity surface laser (VCSEL), an electrically controlled slide rail that drives the VCSEL to move horizontally, a slide rail controller, an L-shaped connecting rod connected to the VCSEL base, and a high-speed camera fixed on the L-shaped connecting rod. The high-speed camera is connected to a data processor via a camera data cable, and a filter is installed in front of the high-speed camera. The VCSEL is located directly in front of the transparent soil sample chamber, and the high-speed camera is located on the side of the transparent soil sample chamber. The dynamic water system controller is connected to the water pump, the first solenoid valve, and the second solenoid valve.

2. The soil visualization pressurized seepage test device as described in claim 1, characterized in that: The transparent soil sample chamber includes an open, bottomless glass box, a waterproof bottom plate, and a waterproof top plate. The lower end of the transparent soil sample chamber is sealed to the waterproof bottom plate with a water inlet and perforations via rubber gaskets. The upper end of the transparent soil sample chamber is sealed to the waterproof top plate with a drainage outlet and perforations via rubber gaskets. The waterproof top plate and waterproof bottom plate are fixed by vertical support rods with threads at both ends that pass through the perforations and self-locking nuts screwed onto both ends of the vertical support rods.

3. The soil visualization pressurized seepage test device as described in claim 2, characterized in that: Both the inlet pipe and the outlet pipe include multiple parallel branch pipes, which are distributed at equal intervals on the diagonal lines of the waterproof base plate and the waterproof top plate. The straight line connecting the branch pipes of the inlet pipe is perpendicular to the straight line connecting the branch pipes of the outlet pipe.

4. The soil visualization pressurized seepage test device as described in claim 3, characterized in that: It also includes an open glass box, a transparent soil sample chamber located in the middle of the open glass box, vertical support rods fixed to the bottom four corners inside the open glass box, a through hole at the bottom of the open glass box for the water inlet pipe to pass through, and a dynamic water system controller located on the lower surface of the open glass box.

5. The soil visualization pressurized seepage test device as described in claim 1, characterized in that: The diameter of the tracer inlet is larger than the diameter of the pipe opening below it.

6. The soil visualization pressurized seepage test device as described in claim 1, characterized in that: Multiple layers of microporous filter membranes were laid at both the top and bottom of the soil sample.

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