CN216669668U - Tester for coarse-grained soil osmotic deformation test - Google Patents

Abstract

The utility model discloses a tester for a coarse-grained soil seepage deformation test, relates to the technical field of water conservancy and hydropower construction devices, and solves the problem that in the prior art, when people read the water level value in a piezometer pipe, estimation errors are easy to occur, and the accuracy of the final experimental result is low. The key points of the technical scheme are as follows: the method comprises the following steps: water supply installation, infiltration appearance, connecting pipe, pressure-measuring pipe, floater sensor and display, the water supply installation passes through the connecting pipe and is connected with the infiltration appearance, and the infiltration appearance passes through the connecting pipe and is connected with the pressure-measuring pipe, is provided with the floater sensor in the pressure-measuring pipe, floater sensor and display electric connection or wireless connection. Through the structure, the purposes of displaying the measurement result in real time, enabling the measurement value to be more accurate, reducing the reading error and improving the accuracy of the final experiment result are achieved.

Description

Tester for coarse-grained soil osmotic deformation test

Technical Field

The utility model relates to the technical field of water conservancy and hydropower construction devices, in particular to a tester for a coarse-grained soil seepage deformation test.

Background

The pores in the soil can form a water-permeable channel when being communicated with each other. Although these channels are irregular and often narrow, water can flow in the soil along these channels by its gravity. The phenomenon of water flow in the earth pore channels, called water seepage; the property of soil that can be penetrated by water, called permeability or water permeability of soil, is one of the mechanical properties of soil. The permeability coefficient of the soil is a parameter for evaluating the permeability of the soil, and the larger the permeability coefficient of the soil is, the stronger the water permeability is; otherwise, the weaker the result.

The theoretical basis for measuring the permeability coefficient of soil in an indoor test is as follows: the seepage flow q or the flow velocity v of the cross section A of the soil sample is measured, and the hydraulic gradient i which is the head loss of the unit process is inversely calculated according to Darcy's law v-ki to obtain the permeability coefficient k of the soil. The indoor determination method for the permeability coefficient of coarse-grained soil specified by various specifications adopts a constant head permeability test, namely: preparing a sample in a sample cylinder in a layering manner, preparing the sample, and continuously injecting water at constant pressure (applying a constant head) into the sample after the sample is saturated by water; and then reading the water level value, the seepage water amount and the seepage time of the piezometer pipe, and calculating the permeability coefficient of the soil according to the Darcy law.

At present, when people read the water level value in the piezometer tube, a large estimation error is easy to occur, so that the accuracy of the final experimental result is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tester for a coarse-grained soil permeability deformation test, which solves the problem that in the prior art, when people read the water level value in a pressure measuring pipe, estimation errors are easy to occur, so that the accuracy of the final experiment result is low.

The technical purpose of the utility model is realized by the following technical scheme:

a tester for coarse-grained soil permeability deformation test comprises: the water supply device is connected with the permeameter through the connecting pipe; the permeameter is connected with the piezometer tube through a connecting tube; the floating ball sensor is arranged in the pressure measuring pipe and used for detecting the water level value of water in the pressure measuring pipe; the display is connected with the floating ball sensor and used for displaying the water level value detected by the floating ball sensor.

Further, the permeameter comprises a meter barrel, an upper porous plate and a lower porous plate; the bottom of the instrument barrel is provided with a bracket for supporting the instrument barrel; the instrument barrel comprises a barrel body and a barrel cover; a lower porous plate and an upper porous plate are sequentially arranged in the barrel body from bottom to top; an accommodating cavity is formed between the lower permeable plate and the upper permeable plate and used for placing a sample; the barrel cover is positioned above the upper permeable plate.

Further, a movable valve is arranged on the barrel cover and used for fastening the upper permeable plate downwards. Utilize the movable valve to compress tightly the porous disk to hold the sample of intracavity through last porous disk compaction, reduce the gap between porous disk and the sample, between the sample, thereby improve the accuracy of final experimental result.

Furthermore, an overflow port is arranged at the upper end of the barrel body; the overflow port is positioned between the barrel cover and the upper permeable plate. The purpose of measuring the seepage flow is achieved through the overflow gap.

Further, a connecting pipe between the water feeder and the permeameter is connected to the lower end of the barrel body and is positioned between the bottom of the barrel body and the lower permeable plate. The lower part of following the infiltration appearance is intake, and the water that sees through down the porous disk can soak the sample that holds the intracavity better, simulates the permeability of sample better to further improve the accuracy of final experimental result.

Furthermore, an inclined permeable plate is arranged between the lower permeable plate and the bottom of the barrel body; and the upper end of the inclined permeable plate is provided with an exhaust hole. The water that comes from the water supply ware before the chamber is held in the entering, when advancing lower porous disk, reduces the aquatic through the exhaust hole and contains gas to further improve the accuracy of final experimental result.

Further, a drain valve is arranged below the barrel body. The blowoff valve sets up in the bottom of staving, after the experiment, can clean this infiltration appearance better to reduce the inside residue of infiltration appearance, and then reduce the error influence that causes the experiment next time, be favorable to improving the accuracy of the final experimental result of experiment next time.

Furthermore, the barrel body is provided with 4 pipe heads at equal intervals from bottom to top, wherein the first pipe head is positioned between the bottom of the barrel body and the lower water permeable plate, the second pipe head is positioned between the upper water permeable plate and the lower water permeable plate, the third pipe head is positioned between the second pipe head and the upper water permeable plate, and the fourth pipe head is positioned between the upper water permeable plate and the overflow port; the first pipe head, the second pipe head, the third pipe head and the fourth pipe head are all connected with an exhaust pipe and a connecting pipe, the connecting pipes are all communicated with a pressure measuring pipe, and the connecting pipes are provided with pressure measuring switches; the third end is connected with an exhaust pipe, and an exhaust valve is arranged on the exhaust pipe. Through the blast pipe, can reduce in the experimentation, come from between porous disk and the bung, in the connecting tube and the pressure measurement intraductal air to reduce the air and cause the error to the experimental result, and then improve the accuracy of final experimental result.

Furthermore, the upper part of the lower porous plate, the lower part of the upper porous plate and the first end of the pipe head are provided with water permeable non-woven fabrics. Reduce the sample from last porous disk, lower porous disk and tube head and go out to reveal and hold the chamber to reduce the error that causes the experimental result because of the sample is lost, and then improve the accuracy of final experimental result.

Further, the water supplier includes a water supply tub, a lift assembly for lifting the water supply tub; the bottom of the water supply barrel is connected with a water supply pipe, an overflow pipe and a connecting pipe for communicating the permeameter.

Compared with the prior art, the utility model has the following beneficial effects:

a tester for coarse-grained soil permeability deformation test comprises: the water feeder, the infiltration appearance, the connecting pipe, the pressure-measuring pipe, floater sensor and display, the water feeder passes through the connecting pipe and is connected with the infiltration appearance, the infiltration appearance passes through the connecting pipe and is connected with the pressure-measuring pipe, be provided with the floater sensor in the pressure-measuring pipe, floater sensor and display electric connection or wireless connection, supply water for the infiltration appearance when the water feeder after, the completion passes through the connecting pipe to the water after coarse grain soil infiltration in the infiltration appearance and gets into the pressure-measuring pipe, at this moment, the floater sensor accuracy detects the water level value of pressure-measuring pipe internal water, and give the display with the water level value output that detects, the display demonstrates the water level value. Through the structure, the purposes of displaying the measurement result in real time, enabling the measurement value to be more accurate, reducing the reading error and improving the accuracy of the final experiment result are achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a tester for a coarse-grained soil permeability deformation test in an embodiment of the utility model;

FIG. 2 is a schematic structural diagram of a main view of a permeameter of a tester for a permeability deformation test of coarse-grained soil according to an embodiment of the utility model;

FIG. 3 is a schematic cross-sectional view of the permeameter shown in FIG. 2;

FIG. 4 is a schematic structural diagram of a pressure measuring pipe of the tester for the infiltration deformation test of coarse-grained soil according to the embodiment of the utility model in a front view;

FIG. 5 is a schematic cross-sectional view of the piezometer tube shown in FIG. 4.

Reference numbers and corresponding part names in the figures:

1-a water supply; 11-overflow pipe; 12-a pulley; 13-a water supply pipe; 14-a winch; 15-small wire rope; 16-a water supply bucket;

2-a permeameter; 20-a blowdown valve; 21-installing a permeable plate; 22-lower permeable plate; 23-barrel body; 24-a barrel cover; 25-a containment chamber; 26-a movable valve; 27-a spillway; 28-inclined permeable plate;

3-connecting the pipes; 31-a pressure measurement switch; 32-an exhaust pipe; 33-an exhaust valve;

4-piezometric tube; 5-a floating ball sensor; 6-a display;

7-a tube head; 71-first stub off; 72-a second stub pipe head; 73-a third tube head; 74-fourth tube head;

8-water permeable non-woven fabric.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example (b): a tester for coarse-grained soil permeability deformation test comprises: the device comprises a water feeder 1, a permeameter 2, a connecting pipe 3, a pressure measuring pipe 4, a floating ball sensor 5 and a display 6.

Wherein, water feeder 1 links together through connecting pipe 3 and permeameter 2, and permeameter 2 links together through connecting pipe 3 and pressure-measuring pipe 4, has placed floater sensor 5 in pressure-measuring pipe 4's inside, and floater sensor 5 passes through AD converter and 6 electric connection of display. Water feeder 1 supplies water through connecting pipe 3 and gives permeameter 2, accomplish the infiltration back to the sample in the permeameter 2 through permeameter 2 and water, water after the infiltration enters into pressure-measuring pipe 4 through connecting pipe 3, the floater sensor 5 in pressure-measuring pipe 4 detects the water in pressure-measuring pipe 4 this moment, detect out present water level value, and export the water level value that detects for display 6, display 6 is after receiving the water level value that floater sensor 5 detected, show the water level value result at display 6, people are through the display result who watches display 6, can accurately obtain present water level value. In the in-service use process, the height of test tube can reach the height of 5m, when people read the water level value in the test tube, need go on with the help of high ladder, has certain distance between high ladder and test tube, consequently has great estimation error at reading in-process, simultaneously, has certain risk of falling at the in-process of people climbing, and need consume longer cat ladder reading time, causes the cost extravagant. According to the tester for the coarse-grained soil osmotic deformation test, provided by the utility model, the water level value in the pressure measuring pipe 4 is detected by using the floating ball sensor 5, so that the purposes of reducing estimation errors and improving the accuracy of a final test result can be achieved. Meanwhile, the water level value detected by the floating ball sensor 5 is displayed in real time by the display 6, so that the aim of facilitating people to read the current water level value is fulfilled. And people can adjust the position of display 6 as required, reach and reduce the climbing time to and the purpose of climbing in-process risk of falling.

An alternative implementation of this embodiment: the permeameter 2 comprises a meter barrel, an upper porous plate 21 and a lower porous plate 22. A support is fixedly welded or screwed at the bottom of the instrument barrel, and a larger space is formed between the bottom of the instrument barrel and the ground through the support. Wherein, the appearance bucket divide into staving 23 and bung 24, is provided with lower porous disk 22 and last porous disk 21 in staving 23 from bottom to top, goes up porous disk 21 and lower porous disk 22 and cup joints in staving 23, cup joints in staving 23 last porous disk 21 and form between the lower porous disk 22 and hold chamber 25, is carrying out the experimentation, and the sample is placed in holding chamber 25. During the in-service use, earlier put into the back with lower porous disk 22 from the upper portion of staving 23, put into staving 23 with the sample many times again, after putting into the sample at every turn, all need strike the sample of putting into and strickle the sample top surface, reached the space that reduces between the sample, improved the purpose of final experimental result accuracy. Wherein, the ratio of the inner diameter of the barrel body 23 to the maximum grain size in the sample is not less than 5, and the height of the barrel body 23 is not less than the maximum grain size in the sample. After the sample is completely put in, the upper porous plate 21 is pressed on the top surface of the sample, the sealing rubber rope and the upper pressure ring are arranged on the upper porous plate 21, finally, the barrel cover 24 is covered, and the barrel cover 24 is fixed on the barrel body 23 in a screwing and fixing mode.

An alternative implementation of this embodiment: the lid 24 is provided with a movable valve 26. After the barrel cover 24 is screwed and fixed on the barrel body 23, the bottom of the movable valve 26 is gradually close to the upper permeable plate 21 by screwing the movable valve 26, and finally abuts against the upper permeable plate 21. Through this movable valve 26, will go up the porous disk 21 and tie and support at the sample top surface, when experimenting, can effectively reduce the clearance between porous disk 21 and the sample, also can consolidate the sample better simultaneously, and then reduce the air volume that exists in the clearance between the porous disk 21 and the sample, the clearance between the sample, reached the error that reduces the air and led to the fact the experimental result, improve the purpose of final experimental result accuracy.

An alternative implementation of this embodiment: a spillway 27 is provided on the upper end of the tub 23, the spillway 27 is located between the tub cover 24 and the upper permeable plate 21, and the purpose of measuring the permeation flow rate is achieved through the spillway 27.

An alternative implementation of this embodiment: the connecting pipe 3 connecting the water feeder 1 and the permeameter 2 is connected to the lower end of the barrel 23 of the permeameter 2 and is located between the bottom of the barrel 23 and the lower porous plate 22. The water supplied from the water supply device 1 enters between the bottom of the barrel 23 and the lower permeable plate 22 from the lower part of the permeameter 2, and as the amount of water increases, the water enters into the accommodating cavity 25 from between the lower permeable plates 22, so that the sample is completely soaked from the bottom to the top surface of the sample. Through this mode, can soak the sample in holding the chamber 25 better, simulate the permeability of sample better to reach the purpose that further improves final experimental result accuracy.

An alternative implementation of this embodiment: before the above-mentioned porous disk 22 of putting into down, oblique porous disk 28 has still been placed, and the slope is 1: 1-1: 1.5, the upper end of the inclined permeable plate 28 is provided with an air vent through which the air in the water coming from the water feeder 1 is discharged. Through this mode, reach the aquatic air content that reduces to get into in the chamber 25 that holds, and then further improve the purpose of final experimental result accuracy.

An alternative implementation of this embodiment: a drain valve 20 is provided below the tub 23. The blowoff valve 20 sets up in the bottom of staving 23, after the experiment, washes 2 internal devices of infiltration appearance from the upper portion of infiltration appearance 2, and the waste liquid after the washing can be better through the blowoff valve 20 of bottom from the inside outflow of infiltration appearance 2. Through the mode that this blowoff valve 20 combines to wash, can clean this 2 insides of infiltration appearance better to reduce 2 inside residuals of infiltration appearance, and then reduce the error influence that causes the experiment next time, be favorable to improving the accuracy of the final experimental result of experiment next time.

An alternative implementation of this embodiment: this a tester for coarse grain soil osmotic deformation test still includes tee bend tube head 7, and the first end and the staving 23 of tube head 7 are connected, and the second end is connected with blast pipe 32, and the third end is connected with connecting pipe 3, is provided with pressure measurement switch 31 on the connecting pipe 3, is provided with discharge valve 33 on the blast pipe 32. 4 pipe heads 7 are arranged on the barrel body 23 from bottom to top at equal intervals, wherein the first pipe head 71 is positioned between the bottom of the barrel body 23 and the lower permeable plate 22, when an experiment is carried out, after the exhaust valve 33 and the pressure measuring switch 31 on the second pipe head 72, the third pipe head 73 and the fourth pipe head 74 are closed, the exhaust valve 33 on the exhaust pipe 32 on the first pipe head 71 is opened, the pressure measuring switch 31 of the connecting pipe 3 on the first pipe head 71 is closed, and then the water feeder 1 is opened to supply water into the barrel body 23, so that the purpose of discharging air between the bottom of the barrel body 23 and the lower permeable plate 22 is achieved. The second pipe head 72 is located between the upper permeable plate 21 and the lower permeable plate 22, after air between the bottom of the barrel 23 and the lower permeable plate 22 is exhausted, the exhaust valve 33 on the exhaust pipe 32 on the second pipe head 72 is opened after the exhaust valve 33 and the pressure measuring switch 31 on the first pipe head 71, the third pipe head 73 and the third pipe head 74 are closed, the pressure measuring switch 31 on the connecting pipe 3 on the second pipe head 72 is closed, then water is continuously supplied into the barrel 23 through the water feeder 1 until the lower layer of the sample in the accommodating cavity 25 is submerged, and the water is soaked for a period of time, so that the purpose of exhausting air between the samples on the lower layer in the accommodating cavity 25 is achieved. The third pipe head 73 is positioned between the second pipe head 72 and the upper permeable plate 21, after air between samples at the lower layer in the accommodating cavity 25 is discharged, the first pipe head 71, the second pipe head 72, the exhaust valve 33 and the pressure measuring switch 31 on the fourth pipe head 74 are closed, the exhaust valve 33 on the exhaust pipe 32 on the third pipe head 73 is opened, the pressure measuring switch 31 of the connecting pipe 3 on the third pipe head 73 is closed, then water is continuously supplied into the barrel body 23 through the water feeder 1 until the upper layer of the samples in the accommodating cavity 25 is submerged, and the water is soaked for a period of time, so that the purpose of discharging air between samples at the upper layer in the accommodating cavity 25 is achieved. The fourth pipe head 74 is positioned between the upper permeable plate 21 and the overflow port 27, after the air between the upper samples in the containing cavity 25 is discharged, the exhaust valve 33 and the pressure measuring switch 31 of the first pipe head 71, the second pipe head 72 and the third pipe head 73 are closed, the exhaust valve 33 of the exhaust pipe 32 on the fourth pipe head 74 is opened, the pressure measuring switch 31 of the connecting pipe 3 on the fourth pipe head 74 is closed, and then the water is continuously supplied into the barrel body 23 through the water supply device 1, so that the purpose of air between the upper permeable plate 21 and the barrel cover 24 is achieved. Through the exhaust pipe 32, the air from the inside of the permeameter 2 and between samples can be reduced in the experimental process, so that the error of the experimental result caused by the air is reduced, and the accuracy of the final experimental result is improved.

An alternative implementation of this embodiment: all be provided with the type of permeating water non-woven fabrics 8 on the port of the above-mentioned top of lower porous disk 22, the top of going up porous disk 21 and the one end that tube head 7 and permeameter 2 are connected, wherein the thickness of the non-woven fabrics 8 of permeating water is 0.5mm, and the less follow lower porous disk 22 of diameter and last porous disk 21 drop out and hold chamber 25 in the effective sample that reduces to and go out to get into connecting pipe 3 from the port of tube head 7, get into in the pressure-measuring pipe 4 even. Reduce through this type of permeating water non-woven fabrics 8 and hold chamber 25 interior sample loss volume to reduce and lose because of holding chamber 25 interior sample and cause the error to the experimental result, reach the purpose that further improves final experimental result accuracy.

An alternative implementation of this embodiment: the water supplier 1 includes a water supply tub 16 and a lifting assembly, and a water supply pipe 13, an overflow pipe 11 and a connection pipe 3 for communicating with the permeameter 2 are connected to the bottom of the water supply tub 16. Wherein the lifting assembly may optionally be replaced by a hydraulic lift, or by other structures that can be lifted. Preferably, the hoist assembly includes a sheave 12, a slickline 15 and a winch 14. A water supply barrel 16 support is arranged at a position higher than 5m and is provided with a pulley 12, a small steel wire rope 15 is used for hanging the water supply barrel 16 (the bottom surface of the water supply barrel 16 must be higher than 5m to ensure the height pressure of a water head) through the pulley 12, and a fixed winch 14 is arranged at a position 1 m away from the ground by using an expansion screw. The slickline 15 is pressed onto the drum of the winch 14. The other end is connected with a water supply barrel 16, and the water supply barrel 16 can be lifted and lowered by shaking the winch 14. The winch 14 is rocked to raise each bucket 1 cm. The water supply pipe 13 of the water supply tub 16 is connected to a water source, and the overflow pipe 11 (the highest water pipe in the tub) of the water supply tub 16 is connected to a gutter on the ground, facilitating the overflow water to be drained to the gutter. The water head pressure is controlled by the water flow supplied by the tap water, the overflow of the special water supply barrel 16, and the water head pressure is changed by adjusting the height of the water supply barrel 16 by the winch 14. Through this structure, through convenient control flood peak pressure, reach the purpose that further improves final experimental result accuracy.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a tester for coarse grain soil osmotic deformation is experimental which characterized in that includes:

a water feeder (1), a permeameter (2), a connecting pipe (3), a pressure measuring pipe (4), a floating ball sensor (5) and a display (6),

the water feeder (1) is connected with the permeameter (2) through a connecting pipe (3);

the permeameter (2) is connected with the piezometer tube (4) through a connecting tube (3);

the floating ball sensor (5) is arranged in the pressure measuring pipe (4) and is used for detecting the water level value of water in the pressure measuring pipe (4);

the display (6) is connected with the floating ball sensor (5) and is used for displaying the water level value detected by the floating ball sensor (5).

2. The tester for the infiltration deformation test of coarse-grained soil according to claim 1, wherein:

the permeameter (2) comprises a meter barrel, an upper permeable plate (21) and a lower permeable plate (22);

the bottom of the instrument barrel is provided with a bracket for supporting the instrument barrel;

the instrument barrel comprises a barrel body (23) and a barrel cover (24);

a lower permeable plate (22) and an upper permeable plate (21) are sequentially arranged in the barrel body (23) from bottom to top;

an accommodating cavity (25) is formed between the lower permeable plate (22) and the upper permeable plate (21) and is used for placing a sample;

the barrel cover (24) is positioned above the upper permeable plate (21).

3. The tester for the infiltration deformation test of coarse-grained soil according to claim 2, wherein:

the barrel cover (24) is provided with a movable valve (26), and the movable valve (26) is used for fastening the upper porous plate (21) downwards.

4. The tester for the infiltration deformation test of coarse-grained soil according to claim 2, wherein:

an overflow port (27) is arranged at the upper end of the barrel body (23);

the overflow port (27) is positioned between the barrel cover (24) and the upper permeable plate (21).

5. The tester for the infiltration deformation test of coarse-grained soil according to claim 2, wherein:

the connecting pipe (3) between the water feeder (1) and the permeameter (2) is connected to the lower end of the barrel body (23) and is positioned between the bottom of the barrel body (23) and the lower permeable plate (22).

6. The tester for the infiltration deformation test of coarse-grained soil according to claim 2, wherein:

an inclined permeable plate (28) is arranged between the lower permeable plate (22) and the bottom of the barrel body (23);

and the upper end of the inclined permeable plate (28) is provided with an exhaust hole.

7. The tester for the infiltration deformation test of coarse-grained soil according to claim 2, characterized in that:

a drain valve (20) is arranged below the barrel body (23).

8. The tester for the infiltration deformation test of coarse-grained soil according to claim 4, wherein:

the tester for the coarse-grained soil permeability deformation test further comprises a three-way pipe head (7);

the barrel body (23) is provided with 4 pipe heads (7) at equal intervals from bottom to top, wherein the first pipe head (71) is positioned between the bottom of the barrel body (23) and the lower water permeable plate (22), the second pipe head (72) is positioned between the upper water permeable plate (21) and the lower water permeable plate (22), the third pipe head (73) is positioned between the second pipe head (72) and the upper water permeable plate (21), and the fourth pipe head (74) is positioned between the upper water permeable plate (21) and the overflow port (27);

the first pipe head (71), the second pipe head (72), the third pipe head (73) and the fourth pipe head (74) are all connected with an exhaust pipe (32) and a connecting pipe (3), the connecting pipe (3) is all communicated with a pressure measuring pipe, and the connecting pipe (3) is provided with a pressure measuring switch (31); the third end is connected with an exhaust pipe (32), and an exhaust valve (33) is arranged on the exhaust pipe (32).

9. The tester for the infiltration deformation test of coarse-grained soil according to claim 8, wherein:

the upper part of the lower porous plate (22), the lower part of the upper porous plate (21) and the first end of the pipe head (7) are both provided with a permeable non-woven fabric (8).

10. The tester for the infiltration deformation test of coarse-grained soil according to claim 1, wherein:

the water feeder (1) comprises a water supply barrel (16) and a lifting assembly for lifting the water supply barrel (16);

the bottom of the water supply barrel (16) is connected with a water supply pipe (13), an overflow pipe (11) and a connecting pipe (3) for communicating the permeameter (2).

Images