Water seepage experiment device for geotechnical investigation

Abstract

The utility model discloses a geotechnical investigation-oriented water seepage experiment device, which comprises: a concentric circular ring, which comprises an inner ring and an outer ring, the outer ring is located at the periphery of the inner ring, and the outer ring and the inner ring are concentrically arranged; the slow flow structure is mounted between the inner ring and the inner ring and the outer ring to form a slow flow space, and the slow flow space is used for preventing the pressure of a water outlet from damaging surface soil during water injection; the flow slowing structure comprises a flow slowing plate with honeycomb-shaped holes, and the flow slowing plate can move up and down along the inner wall of the inner ring and the inner wall of the outer ring. The flow slowing structure is arranged, the flow speed of fluid passing through the flow slowing plate with the honeycomb-shaped holes tends to be stable on the whole, and the situation that rock soil at the bottom of the ring is locally blown up is avoided.

Description

Technical Field

[0001] The present application relates to a water seepage test device for geotechnical investigation, belonging to the technical field of geotechnical engineering experimental equipment. Background Art

[0002] The seepage test of geotechnical investigation is a test of the water permeability of geotechnical materials, which is mainly used to evaluate the permeability, water content, groundwater level, permeability rate and stability of soil. The double ring permeability test is a commonly used test method, which is mainly used to determine the permeability coefficient of soil. In the double ring permeability test, water of the same flow rate is usually injected into two annular spaces (double rings) with a close distance and the same shape at the same time. One ring (inner ring) is filled with the soil sample to be tested, and the other ring (outer ring) is used to measure and control the injection pressure of the permeate. During the test, by measuring the liquid level changes of the inner and outer rings, the permeability coefficient of the soil can be calculated, that is, the water flow rate of the soil passing through a unit area per unit time. For example, the utility model patent with the publication number CN208060346 U discloses a double ring permeability test device, which is specifically: the device can be used to replenish water autonomously according to the drop in the water level in the ring, and accurately measure the amount of water injected into the inner ring. However, during the water injection process, the rock and soil at the bottom of the ring may be blown up, so it is necessary to stabilize the flow rate of water injection into the rock and soil. Utility Model Content

[0003] According to one aspect of the present application, a water seepage experimental device for geotechnical investigation is provided, in which a slow-flow structure is arranged, and a slow-flow plate with honeycomb pores stabilizes the overall flow rate of the fluid passing through, thereby avoiding the situation where the bottom rock and soil of the ring is partially blown up.

[0004] A water seepage experimental device for rock and soil investigation, characterized by comprising:

[0005] Concentric rings, including an inner ring and an outer ring, wherein the outer ring is located outside the inner ring and is concentric with the inner ring;

[0006] A slow-flow structure, which is installed between the inner ring and the outer ring to form a slow-flow space for preventing the pressure of the water outlet from damaging the surface soil during water injection;

[0007] The slow flow structure comprises a slow flow plate with honeycomb pores, and the slow flow plate can move up and down along the inner walls of the inner ring and the outer ring.

[0008] Furthermore, the porosity of the honeycomb pores on the slow flow plate is the same;

[0009] The honeycomb plate pores on the slow flow plate are all open at the periphery.

[0010] Furthermore, the slow flow plate is a flexible slow flow plate;

[0011] The slow flow plate is connected to the inner ring and the outer ring through sliding and interference fit, so as to change the position of the slow flow plate in the concentric rings.

[0012] Further, the height of the concentric rings is 50-80 cm;

[0013] The thickness of the slow flow plate is 3-5 cm.

[0014] Furthermore, the bottoms of the inner ring and the outer ring are both blade-like structures.

[0015] The beneficial effects of this application include:

[0016] The water seepage experimental device for geotechnical investigation provided in the present application has a slow flow structure, including a slow flow plate with honeycomb pores. The slow flow structure is installed in the inner ring and between the inner ring and the outer ring to form a slow flow space, which will make the overall flow rate of the fluid passing through the slow flow space tend to be stable, avoid the situation where the bottom rock and soil of the ring is locally blown up, thereby preventing the pressure of the water outlet from damaging the surface soil during water injection; at the same time, the slow flow plate can move up and down along the inner walls of the inner ring and the outer ring, and can adapt to the application requirements of different insertion heights of the concentric rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a water seepage experimental device for geotechnical investigation in one embodiment of the present application;

[0018] List of parts and reference numerals: 1 - inner ring; 2 - outer ring; 3 - flow control plate; 4 - blade-like structure. DETAILED DESCRIPTION

[0019] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0020] See also Figure 1 , a water seepage experimental device for geotechnical investigation, characterized by comprising:

[0021] Concentric rings, including an inner ring 1 and an outer ring 2, wherein the outer ring 2 is located outside the inner ring 1 and is concentric with the inner ring 1;

[0022] A slow-flow structure, which is installed between the inner ring and the outer ring to form a slow-flow space for preventing the pressure of the water outlet from damaging the surface soil during water injection;

[0023] The slow flow structure includes a slow flow plate 3 with honeycomb pores, and the slow flow plate can move up and down along the inner walls of the inner ring 1 and the outer ring 2.

[0024] Specifically, during water injection, excessive water pressure at the outlet of the water pipe may cause local surface soil to be blown up. Therefore, a slow-flow structure is provided to form a slow-flow space, which will stabilize the overall flow rate of the fluid passing through the slow-flow space, thereby avoiding the situation where the bottom rock and soil of the ring are locally blown up, thereby preventing the pressure of the water outlet from damaging the surface soil during water injection; at the same time, the slow-flow plate can move up and down along the inner walls of the inner ring and the outer ring, and can adapt to the application requirements of different insertion heights of the concentric rings.

[0025] It is worth noting that the flow-decelerating structure is installed between the inner ring and the outer ring, and the width or size of the flow-decelerating plate further fixes the distance between the inner ring and the outer ring.

[0026] The porosity of the honeycomb pores on the slow flow plate 3 is the same;

[0027] The honeycomb-shaped pores on the slow flow plate 3 are all open at their peripheries.

[0028] Specifically, the porosity of the honeycomb pores is the same, which further ensures the smooth flow of the fluid flow rate.

[0029] It is worth noting that the honeycomb pores can be configured as a multi-layer pore framework to further even out the fluid flow rate.

[0030] The slow flow plate 3 is a flexible slow flow plate;

[0031] The deceleration plate 3 is slidably connected to the inner ring 1 and the outer ring 2 and is interference fit therebetween, so as to change the position of the deceleration plate 3 within the concentric rings.

[0032] Specifically, the slow flow plate 3 is a flexible slow flow plate, and the transverse dimensions of the slow flow plate are reasonably designed with the inner diameter of the inner cylinder and the distance between the outer cylinder and the inner cylinder to ensure that the fluid passes through the slow flow plate normally. A guide block is arranged on the side wall of the slow flow plate, and a guide groove is arranged on the side wall of the inner ring and the outer ring. The outer periphery of the slow flow plate is slidably connected with the inner ring and the outer ring, and has an interference fit. Since the slow flow plate is made of flexible material, when adjusted to the corresponding position, the slow flow plate and the concentric ring are confined to the position to achieve position adjustment. Therefore, when the insertion depth of the concentric ring changes, the position of the slow flow plate in the concentric ring can be adjusted.

[0033] The height of the concentric rings is 50-80 cm;

[0034] The thickness of the slow flow plate 3 is 3-5 cm.

[0035] The bottoms of the inner ring 1 and the outer ring 2 are both blade-shaped structures 4 .

[0036] Specifically, the bottoms of the inner ring and the outer ring are both configured as blade structures, so as to facilitate the insertion of the concentric rings into the soil;

[0037] Among them, the inner ring and the outer ring have a certain thickness to meet the hardness requirements. The blade-like structure makes the bottom of the inner ring and the outer ring pointed, and its thickness increases successively along the height direction of the inner ring and the outer ring until it is equal to the thickness of the inner ring and the outer ring.

[0038] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A water seepage test device for geotechnical investigation, characterized in that: include: Concentric rings, comprising an inner ring (1) and an outer ring (2), wherein the outer ring (2) is located outside the inner ring (1) and is arranged concentrically with the inner ring (1); A slow-flow structure, which is installed between the inner ring and the outer ring to form a slow-flow space for preventing the pressure at the water outlet from damaging the surface soil during water injection; The slow flow structure comprises a slow flow plate (3) having honeycomb pores, and the slow flow plate can move up and down along the inner walls of the inner ring (1) and the outer ring (2).

2. The water seepage experimental device for geotechnical investigation according to claim 1 is characterized in that: The porosity of the honeycomb pores on the slow flow plate (3) is the same; The honeycomb-shaped pores on the slow flow plate (3) are all open at their peripheries.

3. The water seepage experimental device for geotechnical investigation according to claim 1 is characterized in that: The slow flow plate (3) is a flexible slow flow plate; The slow flow plate (3) is slidably connected to the inner ring (1) and the outer ring (2) and is interference fit therebetween, so as to change the position of the slow flow plate (3) within the concentric rings.

4. The water seepage experimental device for geotechnical investigation according to claim 1 is characterized in that: The height of the concentric rings is 50-80 cm; The thickness of the slow flow plate (3) is 3-5 cm.

5. The water seepage experimental device for geotechnical investigation according to claim 1 is characterized in that: The bottoms of the inner ring (1) and the outer ring (2) are both blade-shaped structures (4).

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