Testing device for research on impermeability stability of soil body

Abstract

The utility model provides a testing device for researching the impermeability stability of a soil body. A testing device for soil impermeability stability research comprises a compressor, a first water pipe, a water tank, a second water pipe, a first testing pipe body, a second testing pipe body and a water collecting tank which are sequentially connected, and a detachable iron gauze is arranged at the open end of the first testing pipe body; a flow velocity sensor for measuring the water velocity is arranged in the water outlet end of the second test tube; and a filter layer through which water passes but not soil passes is arranged in the middle of the water collection tank. The device disclosed by the utility model is specially used for researching the impermeability stability of the soil body and has the advantages of simple structure, simplicity and convenience in operation and the like; by replacing different anti-piping material layers, the most effective anti-piping material for the tested soil can be obtained according to a test result; the applicability of the same anti-piping material layer to the test soil with different particle gradation can be obtained according to the test result by replacing the test soil with different particle gradation.

Description

Technical Field

[0001] The utility model relates to the technical field of research on soil anti-seepage stability, and particularly relates to a test device for research on soil anti-seepage stability. Background Art

[0002] During the water-blocking process of a dike, water flow will flow from the high-water-level side along the pores in the soil to the low-water-level side; when the flow velocity of the seepage water is too large, the fine particles filled in the pores of the soil skeleton will be carried away by the seepage water and form a concentrated seepage channel. This phenomenon is called piping, which is the most common form of seepage failure in hydraulic engineering; after piping occurs in the dike, the sediment inside the dike foundation continuously gushes out at the piping overflow point, and the diameter of the piping will become larger and larger, resulting in uneven settlement of the dike foundation and ultimately possibly leading to the collapse of the dike. Therefore, improving the permeability stability of soil particles during the dike design process and construction process to prevent piping from occurring is of great significance for ensuring the safety of the dike.

[0003] Measures to strengthen the seepage stability of the dike mainly include three aspects: (1) increasing the dike cross-section to extend the seepage path and indirectly reducing the seepage gradient and seepage velocity; (2) using a filter layer to control the loss of soil particles; (3) enhancing the anti-seepage stability of the soil. The existing design concepts and engineering measures mainly focus on the first two aspects, while less attention is paid to enhancing the anti-seepage stability of the soil. To conduct research on the anti-seepage stability of soil, corresponding experimental test devices are required, but such experimental test devices are lacking at present. Content of the Utility Model

[0004] The utility model provides a test device for research on soil anti-seepage stability, which solves the problem of lacking corresponding experimental test devices during the research on soil anti-seepage stability.

[0005] The technical solution of the utility model is specifically as follows:

[0006] A test device for research on soil anti-seepage stability includes a compressor, a water tank, a first test tube, a second test tube, and a water collection tank. Both the first test tube and the second test tube are hollow tubes. The two opposite ends of the first test tube are respectively a closed end and an open end, and the two opposite ends of the second test tube are respectively a water inlet end and a water outlet end. The compressor is connected to the top of the water tank through a first water pipe, the water tank is connected to the closed end of the first test tube through a second water pipe, a detachable wire mesh is arranged on the open end of the first test tube, the open end of the first test tube is detachably connected to the water inlet end of the second test tube, a flow velocity sensor for measuring the water flow velocity is arranged inside the water outlet end of the second test tube, the water inlet end of the second test tube is connected to the top of the water collection tank through a third water pipe, and a filter layer that allows water to pass through but not soil is arranged in the middle of the water collection tank.

[0007] Preferably, a plurality of spaced anti-piping material layers are provided in the first test tube body, and the anti-piping material layers are placed at both the opening end of the wire mesh away from the first test tube body and the closed end of the first test tube body.

[0008] Preferably, the first test tube body is filled with test soil to be tested, and the anti-piping material layers are distributed at intervals in the test soil.

[0009] Preferably, the water tank is filled with water, and one end of the second water pipe extends from the top of the water tank to the inner bottom of the water tank and is immersed under the water in the water tank.

[0010] Preferably, flange plates are fixed around the opening end of the first test tube body and the water inlet end of the second test tube body, and the two flange plates are connected by the cooperation of bolts and nuts.

[0011] Preferably, a sealing gasket is also clamped between the two flange plates.

[0012] Preferably, the second test tube body is a right-angled tube, the water outlet end of the second test tube body is downward, and the water outlet end of the second test tube body is a reduced neck end.

[0013] Preferably, the filter layer is a filter paper layer.

[0014] Advantages of the present utility model:

[0015] 1. The present utility model provides a test device for studying the anti-seepage stability of soil masses, which can be specifically used for studying the anti-seepage stability of soil masses, and has the advantages of simple structure and convenient operation.

[0016] 2. The test device of the present utility model can obtain the most effective anti-piping material for the test soil according to the test results by replacing different anti-piping material layers; by replacing the test soil with different particle gradations, the applicability of the same anti-piping material layer to the test soil with different particle gradations can be obtained according to the test results. Description of the drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a structural schematic diagram of the present utility model;

[0019] Figure 2This is a schematic structural diagram of the anti-piping material layer in the present utility model.

[0020] Reference numerals in the figure: 1 - compressor, 2 - first water pipe, 3 - water tank, 4 - second water pipe, 5 - first test tube body, 6 - test soil, 7 - anti-piping material layer, 8 - wire mesh, 9 - flange, 10 - second test tube body, 11 - flow velocity sensor, 12 - third water pipe, 13 - water collecting tank, 14 - filter layer. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1

[0023] Referring to Figure 1-2 , a test device for studying the anti-seepage stability of soil masses, including a compressor 1, a water tank 3, a first test tube body 5, a second test tube body 10, and a water collecting tank 13. Both the first test tube body 5 and the second test tube body 10 are hollow tube bodies. The two opposite ends of the first test tube body 5 are a closed end and an open end respectively. The two opposite ends of the second test tube body 10 are a water inlet end and a water outlet end respectively. The compressor 1 is connected to the top of the water tank 3 through the first water pipe 2. The water tank 3 is connected to the closed end of the first test tube body 5 through the second water pipe 4. A detachable wire mesh 8 is provided on the open end of the first test tube body 5. The open end of the first test tube body 5 is detachably connected to the water inlet end of the second test tube 10. A flow velocity sensor 11 for measuring the water flow velocity is provided inside the water outlet end of the second test tube 10. The water inlet end of the second test tube 10 is connected to the top of the water collecting tank 13 through the third water pipe 12. A filter layer 14 through which water passes but soil does not pass is provided in the middle of the water collecting tank 13.

[0024] A plurality of spaced anti-piping material layers 7 are provided inside the first test tube body 5, and the anti-piping material layers 7 are placed at both the open end of the wire mesh 8 away from the first test tube body 5 and the closed end of the first test tube body 5. The first test tube body 5 is filled with test soil 6 to be tested, and the anti-piping material layers 7 are distributed at intervals in the test soil 6.

[0025] The water tank is filled with water, and one end of the second water pipe 4 extends from the top of the water tank 3 to the inner bottom of the water tank 3 and is immersed under the water in the water tank 3.

[0026] Flange plates 9 are fixed around the open end of the first test tube body 5 and the water inlet end of the second test tube body 10. The two flange plates 9 are connected by the cooperation of bolts and nuts. To ensure the sealing performance, a sealing gasket can also be clamped between the two flange plates 9. Connecting by the flange plate 9 plus bolts is just one way, and it can also be detachably connected through other clamping structures, not limited to the flange plate plus bolts method.

[0027] As a preferred technical solution, the second test tube body 10 is a right-angled tube. The water outlet end of the second test tube 10 body faces downward, and the water outlet end of the second test tube body 10 is a reduced neck end.

[0028] As a preferred technical solution, the filter layer 14 is a filter paper layer. The filter paper layer has a low cost and is convenient to use. Of course, other filter layers can also be selected as long as the purpose of allowing water to pass through but not soil is achieved.

[0029] For the connection between the ends of the first water pipe 2, the second water pipe 4, and the third water pipe 12 and other components, the sealing performance should be ensured to prevent water leakage.

[0030] The present utility model provides a test device for studying the anti-seepage stability of soil bodies, which can be specifically used for studying the anti-seepage stability of soil bodies and has the advantages of simple structure and convenient operation. The test device of the present utility model can obtain the most effective anti-piping material for the tested soil 6 according to the test results by replacing different anti-piping material layers 7; by replacing the tested soil 6 with different particle gradations, the applicability of the same anti-piping material layer 7 to the tested soil 6 with different particle gradations can be obtained according to the test results.

[0031] Embodiment 2

[0032] A test method for studying the anti-seepage stability of soil bodies, which is used to support the test device for studying the anti-seepage stability of soil bodies in Embodiment 1, includes the following steps:

[0033] Step 1: Fill the test soil in the first test tube body and place several layers of anti-piping material layers at uniform intervals. After setting up the wire mesh at the open end of the first test tube body, fixedly connect the open end of the first test tube body with the water inlet end of the second test tube;

[0034] Step 2: Operate the compressor at low power until the water outlet condition of the third water pipe is stable;

[0035] Step 3: Adjust the power of the compressor to the test value, operate for a period of time, stop the test after the water outlet condition of the third water pipe is stable, and comprehensively evaluate the anti-piping ability of the fiberglass material to the soil body based on the flow rate data collected by the flow rate sensor and the volume of soil particles collected on the filter layer;

[0036] Step 4: Replace the anti-piping material layer and repeat Steps 1-3. Compare the results of the anti-piping tests on the test soil with different anti-piping material layers to obtain the most effective anti-piping material for the test soil. Alternatively, replace the test soil with different particle gradations and repeat Steps 1-3. Compare the results of the anti-piping tests on the test soil with different particle gradations using the same anti-piping material layer to obtain the applicability of the anti-piping material layer to the test soil with different particle gradations.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A testing device for studying soil anti-seepage stability, characterized in that: It includes a compressor, a water tank, a first test tube body, a second test tube body and a water collecting tank. The first test tube body and the second test tube body are both hollow tubes. The opposite ends of the first test tube body are a closed end and an open end respectively, and the opposite ends of the second test tube body are a water inlet end and a water outlet end respectively. The compressor is connected to the top of the water tank through a first water pipe, and the water tank is connected to the closed end of the first test tube body through a second water pipe. A detachable wire mesh is arranged on the open end of the first test tube body. The open end of the first test tube body is detachably connected to the water inlet end of the second test tube. A flow rate sensor for measuring water flow rate is arranged in the water outlet end of the second test tube. The water inlet end of the second test tube is connected to the top of the water collecting tank through a third water pipe. A filter layer through which water passes but soil does not pass is arranged in the middle of the water collecting tank.

2. The testing device for studying soil anti-seepage stability according to claim 1, characterized in that: A plurality of interval anti-piping material layers are arranged in the first test tube body, and the anti-piping material layers are placed on both the open end of the wire mesh away from the first test tube body and the closed end of the first test tube body.

3. The testing device for studying soil anti-seepage stability according to claim 2, characterized in that: The first test tube body is filled with test soil for testing, and the anti-pipe surge material layers are distributed in the test soil at intervals.

4. The testing device for studying soil anti-seepage stability according to claim 1, characterized in that: The water tank is filled with water, and one end of the second water pipe extends from the top of the water tank to the inner bottom of the water tank and is immersed in the water in the water tank.

5. The testing device for studying soil anti-seepage stability according to claim 1, characterized in that: Flanges are fixed to the peripheries of the opening end of the first test tube body and the water inlet end of the second test tube body, and the two flanges are connected by bolts and nuts.

6. The testing device for studying soil anti-seepage stability according to claim 5, characterized in that: A sealing gasket is also sandwiched between the two flanges.

7. The testing device for studying soil anti-seepage stability according to claim 1, characterized in that: The second test tube body is a right-angle tube, the water outlet end of the second test tube body is downward, and the water outlet end of the second test tube body is a reduced neck end.

8. The testing device for studying soil anti-seepage stability according to claim 1, characterized in that: The filter layer is a filter paper layer.

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