CN219328712U - Variable water head permeation system - Google Patents
Variable water head permeation system Download PDFInfo
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- CN219328712U CN219328712U CN202223183168.XU CN202223183168U CN219328712U CN 219328712 U CN219328712 U CN 219328712U CN 202223183168 U CN202223183168 U CN 202223183168U CN 219328712 U CN219328712 U CN 219328712U
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Abstract
A variable water head infiltration system comprises a pressure-stabilizing water supply device and an infiltration device, wherein the infiltration device comprises a base, a sleeve, a cutting ring, an upper permeable stone and a lower permeable stone; the ring cutter is arranged in the sleeve in a clamping way through the clamping groove at the upper end and the top of the sleeve, the upper permeable stone is positioned above the sleeve, and a sealing ring is arranged between the upper permeable stone and the ring cutter; an upper cover provided with a water outlet is covered on the top of the upper permeable stone and the sleeve; a lower permeable stone is arranged in the groove of the base and is contacted with a soil sample in the cutting ring; the base is provided with a water inlet and an air outlet, the water inlet and the air outlet are communicated with the groove, and the water inlet is used for being connected with the pressure-stabilizing water supply device; the pressure sensor is arranged above the permeation device through a bracket, and a probe of the pressure sensor passes through the upper cover to be propped against the upper permeable stone. The utility model can simulate the stable high water pressure condition of soil layers under different depths, thereby being beneficial to the measurement of the permeability coefficient of deep soil under the high water pressure effect.
Description
Technical Field
The utility model belongs to the field of variable water head permeation tests, and particularly relates to a variable water head permeation system.
Background
The variable water head permeability test is a test method for measuring the permeability coefficient of soil in a drill hole, and in the test process, the test water head gradually descends and finally approaches zero. And calculating the permeability coefficient of the test soil layer according to the relation between the falling speed of the test water head in the sleeve and time. The existing variable water head infiltration device (TST-55 soil infiltration instrument) is mainly suitable for testing the permeability coefficient of a sample by observing the change of a water head along with time, and is mainly suitable for cohesive soil with weak permeability. The existing variable water head penetrating device can not solve the problem that the permeability coefficient of a sample can not be measured under the action of certain water pressure of deep soil, and the existing variable water head can not simulate the stable high water pressure condition. In addition, the existing variable head osmotic devices cannot measure the pressure generated by the sample in the osmotic device under the action of water.
Disclosure of Invention
The utility model aims to provide a variable water head infiltration system which can simulate stable high water pressure conditions of soil layers under different depths, thereby being beneficial to measurement of sample infiltration coefficients of deep soil bodies under the action of high water pressure.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the variable water head infiltration system comprises a pressure-stabilizing water supply device and an infiltration device, wherein the pressure-stabilizing water supply device is used for providing water pressure required by a test for a soil sample in the infiltration device, and the infiltration device comprises a base, a sleeve, a cutting ring, an upper permeable stone and a lower permeable stone; the ring cutter is arranged in the sleeve in a clamping way through the clamping groove at the upper end and the top of the sleeve, the upper permeable stone is positioned above the sleeve, and a sealing ring is arranged between the upper permeable stone and the ring cutter; an upper cover provided with a water outlet is covered on the top of the upper permeable stone and the sleeve; a lower permeable stone is arranged in the groove of the base and is contacted with a soil sample in the cutting ring; the base is provided with a water inlet and an air outlet, the water inlet and the air outlet are communicated with the groove, and the water inlet is used for being connected with the pressure-stabilizing water supply device; the pressure sensor is arranged above the permeation device through the support, and a probe of the pressure sensor passes through the opening of the upper cover and is propped against the upper permeable stone.
A sealing ring is arranged in the base around the upper edge of the groove.
Two oblique beam supports with the tops connected are arranged on the base to form a bracket for installing the pressure sensor.
And the intersection of the two inclined beam supports is provided with a mounting hole for mounting the pressure sensor.
The pressure sensor comprises a display, a handle and a probe, and the handle is fixed in the mounting hole.
The pressure-stabilizing water supply device comprises a pressure tank and a water supply pipe, and the water supply pipe is connected with the water inlet.
The water supply pipe is a metal pipe.
The height of the water inlet on the base is the same as the height of the water supply pipe on the pressure tank.
The beneficial effects of the utility model are as follows: the variable water head of the existing variable water head penetrating device can only provide relatively small water pressure conditions, and the water pressure conditions of deep soil cannot be accurately reflected. Compared with the existing variable water head permeation device, the variable water head permeation system can simulate the water pressure of the soil body under the condition of soil layers with different depths, and meanwhile, the water supply pressure tank provides different pressure stabilization for the permeation device, so that the variable water head permeation system is more flexible.
The utility model can measure the true pressure of soil under the action of water in the infiltration device through the pressure sensor.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a base portion of a permeation device according to the present utility model;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic view of the structure above the base of the osmotic engine according to the present utility model;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a schematic diagram of the relationship between a pressure sensor and a permeation device according to the present utility model;
the marks in the figure: 1. the support platform, 2, the base, 201, the water inlet, 202, the recess, 203, the gas vent, 204, the sealing washer groove, 3, the sleeve, 4, the upper cover, 5, the sloping support, 6, pressure sensor, 601, probe, 602, handle, 603, the display, 7, the overhead tank, 8, the delivery pipe, 9, go up the permeable stone, 10, go up sealing washer, 11, the cutting ring, 12, lower permeable stone, 13, delivery port, 14, lower sealing washer.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples, which are not intended to be limiting.
Referring to the drawings, a variable head infiltration system comprises a pressure-stabilizing water supply device and an infiltration device, wherein the infiltration device is placed on a supporting table 1, so that the water inlet of the infiltration device is equal in height to a water supply pipe 8 of the pressure-stabilizing water supply device. A pressure sensor 6 is also mounted on the permeation device.
As shown in fig. 2-5, the infiltration device comprises a base 2, a sleeve 3, a cutting ring 11, an upper permeable stone 9 and a lower permeable stone 12, a sunken groove 202 is arranged in the center of the base 2, a water inlet 201 and an air outlet 203 are respectively arranged on two opposite sides of the base 2, the water inlet 202 and the air outlet 203 are communicated with the groove 202, and a sealing ring groove 204 is arranged on the upper surface of the base 2 around the upper edge of the groove 202. Two opposite sides of the base 2 are connected with two inclined beam supports 5, the upper ends of the two inclined beam supports 5 are connected to form an inverted V shape, and mounting holes for mounting the pressure sensor 6 are formed in the connection positions of the upper ends of the two inclined beam supports 5.
The upper end and the lower end of the sleeve 3 are open, a cutting ring 11 for soil taking is arranged in the sleeve, and an annular clamping groove is formed in the upper end port of the sleeve 3 along the position so as to clamp the upper end of the cutting ring 11 into the clamping groove, so that the cutting ring 11 is connected with the sleeve 3; the upper permeable stone 9 is assembled at the upper end of the sleeve 3 through the upper sealing ring 10, the upper permeable stone 9 is pressed on a soil sample in the cutting ring 11, the upper end of the sleeve 3 is also provided with the upper cover 4, the upper permeable stone 9 and the upper sealing ring 10 are covered in the upper cover 4, and the side surface of the upper cover 4 is provided with the water outlet 13 of the penetrating device. The lower permeable stone 12 is placed in the groove 202 of the base 2, the bottom of the soil sample in the cutting ring 11 is pressed on the lower permeable stone 12, and the lower sealing ring 14 arranged in the sealing ring groove 204 seals between the lower permeable stone 9 and the soil sample.
Valves are installed on the exhaust port 203 and the water outlet 13 to realize the control of exhaust or drainage.
The pressure-stabilizing water supply device comprises a pressure tank 7 and a water supply pipe 8, wherein the water supply pipe 8 is connected with the water inlet 201 of the base 2, and the pressure tank 7 provides pressure water with different pressures required by the test for the osmosis device.
The pressure sensor 6 comprises a probe 601, a handle 602 and a display 603, wherein the handle 602 is arranged in a mounting hole of the inclined beam support 5, and the height of the probe 601 is adjusted up and down, so that the probe 601 is propped against the upper permeable stone 9 through an opening of the upper cover 4.
The utility model performs the following preparation before use: firstly, a layer of vaseline is coated on the inner wall of a cutting ring 11, then the cutting ring 11 is used for cutting a circular soil sample, then the soil sample at the upper end and the lower end of the cutting ring 11 is scraped to be flat by a soil cutting knife, and then the outer wall of the cutting ring 11 is wiped clean. Then put cutting ring 11 and soil sample together in sleeve 3, the upper end card of cutting ring 11 is in the draw-in groove at sleeve 3 top, then with the sealed assembly of upper permeable stone 9 that has upper seal ring 10 in sleeve 3 upper end, install upper cover 4 on sleeve 3, put lower permeable stone 12 in recess 202 of base 2 at last, put the sleeve 3 that is equipped with the soil sample above base 2 again, and ensure the sealed effect of lower seal ring 14.
When the permeation test is carried out, firstly, the gas in the permeation device is required to be discharged, the permeation device can be transversely placed, the air outlet 203 and the water outlet 13 are upwards, then water is fed into the permeation device through the water inlet 201, meanwhile, the valve of the water outlet 13 is closed, the valve of the air outlet 203 is opened, redundant gas in the device is discharged from the air outlet 203 until water is discharged from the air outlet 203, and the air in the device is completely discharged. After the air is exhausted, the osmotic test is carried out on the righting position of the osmotic device, at the moment, the valve of the air outlet 203 is required to be closed, pressurized water enters from the water inlet 201 of the osmotic device and enters into a soil sample through the lower permeable stone 12, the soil sample stands for a period of time under the action of a certain water head, then the soil sample flows out from the water outlet 13 on the side surface of the upper cover 4, the water yield of the water outlet in unit time is recorded, and the osmotic coefficient of the soil body can be calculated by repeating the same experimental operation for several times.
In performing the penetration test, the pressure tank 7 may provide different water pressures to simulate the water pressure conditions experienced by the soil body at different depths. At the same time, the soil sample will generate a certain pressure under the action of the water head, so that the upper permeable stone 9 is displaced to a certain extent, recorded by the pressure sensor 6 and displayed on the sensor display 603.
The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present utility model with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present utility model are within the scope of the claims appended hereto.
Claims (8)
1. The utility model provides a variable head infiltration system, includes steady voltage water supply installation and infiltration device, and steady voltage water supply installation is used for providing the required water pressure of experiment to the soil sample in the infiltration device, its characterized in that: the infiltration device comprises a base, a sleeve, a cutting ring, an upper permeable stone and a lower permeable stone; the ring cutter is arranged in the sleeve in a clamping way through the clamping groove at the upper end and the top of the sleeve, the upper permeable stone is positioned above the sleeve, and a sealing ring is arranged between the upper permeable stone and the ring cutter; an upper cover provided with a water outlet is covered on the top of the upper permeable stone and the sleeve; a lower permeable stone is arranged in the groove of the base and is contacted with a soil sample in the cutting ring; the base is provided with a water inlet and an air outlet, the water inlet and the air outlet are communicated with the groove, and the water inlet is used for being connected with the pressure-stabilizing water supply device; the pressure sensor is arranged above the permeation device through the support, and a probe of the pressure sensor passes through the opening of the upper cover and is propped against the upper permeable stone.
2. A variable head infiltration system according to claim 1, in which: a sealing ring is arranged in the base around the upper edge of the groove.
3. A variable head infiltration system according to claim 1, in which: two oblique beam supports with the tops connected are arranged on the base to form a bracket for installing the pressure sensor.
4. A variable head infiltration system according to claim 3, in which: and the intersection of the two inclined beam supports is provided with a mounting hole for mounting the pressure sensor.
5. A variable head infiltration system according to claim 4, in which: the pressure sensor comprises a display, a handle and a probe, and the handle is fixed in the mounting hole.
6. A variable head infiltration system according to claim 1, in which: the pressure-stabilizing water supply device comprises a pressure tank and a water supply pipe, and the water supply pipe is connected with the water inlet.
7. The variable head infiltration system of claim 6, wherein: the water supply pipe is a metal pipe.
8. A variable head infiltration system according to claim 1, in which: the height of the water inlet on the base is the same as the height of the water supply pipe on the pressure tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223183168.XU CN219328712U (en) | 2022-11-29 | 2022-11-29 | Variable water head permeation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223183168.XU CN219328712U (en) | 2022-11-29 | 2022-11-29 | Variable water head permeation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219328712U true CN219328712U (en) | 2023-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223183168.XU Active CN219328712U (en) | 2022-11-29 | 2022-11-29 | Variable water head permeation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219328712U (en) |
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2022
- 2022-11-29 CN CN202223183168.XU patent/CN219328712U/en active Active
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