CN212844908U - Soil permeameter capable of applying confining pressure - Google Patents
Soil permeameter capable of applying confining pressure Download PDFInfo
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- CN212844908U CN212844908U CN202021862508.XU CN202021862508U CN212844908U CN 212844908 U CN212844908 U CN 212844908U CN 202021862508 U CN202021862508 U CN 202021862508U CN 212844908 U CN212844908 U CN 212844908U
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Abstract
The utility model discloses a can apply soil infiltration appearance of confined pressure, including water supply installation, penetrant unit, supercharging device, the water supply installation below is connected with penetrant unit through the rubber tube, and penetrant unit's side is provided with supercharging device, and penetrant unit includes the barrel, and the barrel surface is provided with first graduation apparatus, and the barrel bottom is provided with the base that can dismantle the connection, and the inside metal orifice plate that is provided with of barrel, metal orifice plate top are provided with the cotton that permeates water, the barrel top is provided with the sealed lid that can dismantle the connection, has seted up a plurality of pressure taps with the fixed spacing on the lateral wall between sealed lid and the metal orifice plate, is connected with the pressure-measuring pipe of fixing on the. The utility model discloses the external supercharging device of first mouth of pipe that sets up, when the change state of soil permeability under the different water pressures of needs test, open supercharging device, supercharging device exerts pressure in to the barrel, satisfies no cohesive nature soil, the penetration test of cohesive nature soil and rock sample, and application scope is extensive.
Description
Technical Field
The utility model belongs to geotechnical test instrument field especially relates to a can apply hydraulic soil infiltration appearance.
Background
The permeability is an important performance index of the soil body, and the permeability coefficient is used as an important physical property parameter of the soil material to be tested. At present, a type 70 soil permeameter is basically adopted in a constant head permeability test, however, the type 70 soil permeameter commonly used has the following disadvantages in the constant head permeability test process. Because the natural water actually acting on soil is complex, the test is usually carried out by adopting distilled water or filtered clean water, but the water needs to be boiled and degassed, the water temperature is controlled to be 3-4 ℃ higher than the temperature of a test room, the existing device cannot be operated and realized, only a heating device and a cooling measure can be additionally used for degassing and temperature regulation, the operation is complex, the artificial influence factors are more, and the problems that the test requirements are not met and the like easily occur; the wall of the cylinder is not transparent and has no scale, so that the filling and water seepage conditions of the soil sample cannot be mastered. Therefore, a soil permeameter which can ensure the water supply quality, is simple to operate, can adjust the water pressure and is convenient to observe and can apply the water pressure needs to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at guaranteeing the water supply quality for the design, a can apply hydraulic soil permeameter that easy operation, water pressure are adjustable, be convenient for observe.
Based on the above-mentioned purpose, the utility model discloses take following technical scheme:
a soil permeameter capable of applying confining pressure comprises a water supply device, a permeation device and a pressurizing device, wherein the permeation device is connected below the water supply device through a rubber pipe, the pressurizing device is arranged on the side edge of the permeation device, the permeation device comprises a barrel body, a first scale is arranged on the surface of the barrel body, a base which is detachably connected is arranged at the bottom of the barrel body, a metal orifice plate is arranged inside the barrel body, permeable cotton is arranged above the metal orifice plate, the top of the cylinder body is provided with a sealing cover which is detachably connected, a plurality of pressure measuring holes are arranged on the side wall between the sealing cover and the metal pore plate at fixed intervals, pressure measuring pipes fixed on the scale plate are connected on the pressure measuring holes, a first pipe orifice arranged at the upper part of the barrel body is connected with a supercharging device through a rubber pipe, a second pipe orifice arranged at the lower part of the barrel body enters the water seepage cup through the rubber pipe, and a second dial gauge is arranged on the surface of the water seepage cup.
Further, the water supply device comprises a water storage device, a heater is arranged in the water storage device, a temperature regulator is arranged on the inner wall of the water storage device, a display screen is arranged on the front face of the water storage device, and the temperature regulator is electrically connected with the display screen and the heater through conducting wires.
Furthermore, the barrel comprises two semicircular barrels which are detachably connected, the barrels are made of transparent materials, and the inner walls of the barrels are subjected to sanding treatment.
Further, a sealing gasket is arranged at the joint of the two semicircular cylinders.
Furthermore, a filter plug is detachably mounted in the hole of the pressure measuring hole, and a filter screen is arranged on the filter plug.
Furthermore, a cup cover with holes is arranged at the top of the water seepage cup, and a thermometer is inserted into the opening of the cup cover.
Furthermore, the display screen is a touch display screen.
Furthermore, valves are arranged at the pressure measuring hole, the first pipe orifice, the second pipe orifice and the water outlet of the water storage device.
Further, the thickness of the permeable cotton is 2cm, and the diameter of the permeable cotton is larger than the inner diameter of the cylinder.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a water supply installation is provided with water receiver, heater, temperature regulator, display screen, can boil the degasification through the heater with supplying water, controls the temperature through temperature regulator simultaneously and is higher than laboratory temperature 3-4 ℃, and intelligent control temperature has saved artifical processing to water, improves test efficiency and degree of accuracy.
2. The utility model discloses be provided with supercharging device, when the change state of soil permeability under the different water pressures of needs test, operating personnel closes the valve of water receiver delivery port, opens supercharging device, and supercharging device exerts pressure in to the barrel, can be used for testing the permeability change of soil under the different water pressures, and water pressure is adjustable, and application scope is extensive, satisfies the penetration test of no cohesive soil, cohesive soil and rock sample.
3. The utility model is provided with a cylinder made of transparent material, the surface of which is marked with scales, which can visually observe the loading condition of the soil body and better control the compactness and uniformity of the soil body; the inner surface of the cylinder body is subjected to frosting treatment, so that the friction force between the inner surface of the cylinder body and a soil body is increased, and the floating of the whole soil body in the test process is avoided; the barrel is formed by combining two half barrels, so that the sample is convenient to clean.
4. The utility model discloses the cotton that permeates water that sets up, thickness 2cm, diameter slightly are greater than the barrel internal diameter, have better compressibility and can replace the coarse sand as the buffer layer, prevent that the soil body fine grain from being washed away by the water-washed, easy operation promotes test efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the filter plug of the present invention;
FIG. 3 is a top view of the plug of the present invention;
fig. 4 is a longitudinal view of the expanded cylinder of the present invention;
fig. 5 is a schematic cross-sectional view of the cylinder of the present invention.
1. A water reservoir; 11. a display screen; 12. a heater; 13. a temperature regulator; 2. a barrel; 21. a sample to be tested; 211. a first nozzle; 212. a second orifice; 213. a bolt; 214. a gasket; 22. a metal orifice plate; 23. water-permeable cotton; 24. a piezometric tube; 241. a pressure measuring hole; 242. a scale plate; 243. a filter plug; 244. filtering with a screen; 25. a sealing cover; 26. a base; 3. a pressure boosting device; 4. a water seepage cup; 41. a thermometer.
Detailed Description
As shown in fig. 1-5, the utility model discloses a can exert soil infiltration appearance of confined pressure, including water supply installation, penetrant unit, supercharging device 3, water supply installation includes water receiver 1, and water receiver 1 is inside to be provided with heater 12, and water receiver 1 inner wall is provided with temperature regulator 13, is provided with display screen 11 on the water receiver 1 openly. The display screen 11 is a touch display screen, and the temperature regulator 13 is electrically connected with the display screen 11 and the heater 12 through wires. The water supply device is arranged at a position higher than the top of the penetration device by a certain height, and test water meeting the standard requirement is provided for the test through the rubber tube. The side of penetrant unit is provided with supercharging device 3, and the penetrant unit includes barrel 2, and 2 surfaces of barrel are provided with first graduation apparatus, and barrel 2 comprises two semi-circular barrels can dismantle the connection, and two semi-circular barrel junctions are provided with sealed pad 214, can ensure semi-circular barrel seamless connection. The barrel 2 is made of transparent materials, and the inner wall of the barrel 2 is subjected to frosting treatment. The bottom of the cylinder body 2 is provided with a base 26 which is detachably connected, and the base 26 is screwed with the cylinder body 2 through threads, so that water tightness can be ensured. The metal pore plate 22 is arranged in the cylinder 2, and the metal pore plate 22 is horizontally arranged at a certain distance from the bottom of the cylinder 2. The permeable cotton 23 is arranged above the metal pore plate 22, the permeable cotton 23 is 2cm thick, the diameter of the permeable cotton is larger than the inner diameter of the cylinder 2, the permeable cotton has good compressibility and can replace coarse sand to serve as a buffer layer, and soil fine particles are prevented from being washed away by water. The top of the cylinder body 2 is provided with a sealing cover 25 which is detachably connected, and the sealing cover 25 is connected by threads. Three pressure measuring holes 241 are arranged on the side wall between the sealing cover 25 and the metal hole plate 22 at a fixed interval, and the interval is 100mm and is vertically arranged. A filter plug 243 is detachably mounted in the hole of the pressure measuring hole 241, a filter screen 244 is arranged on the filter plug 243, and the filter screen 244 is made of copper wires. The pressure measuring hole 241 is connected with a pressure measuring pipe 24 fixed on the scale plate 242, the upper part of the cylinder 2 is provided with a first pipe orifice 211 connected with a rubber pipe, and the first pipe orifice 211 is connected with an interface of the supercharging device 3. The lower part of barrel 2 is provided with the second mouth of pipe 212 of connecting the rubber tube, enters into infiltration cup 4 through the rubber tube, and infiltration cup 4 surface is provided with the second graduation apparatus, and the top of infiltration cup 4 is provided with foraminiferous bowl cover, and the bowl cover can avoid moisture evaporation to cause the influence to the test result, and bowl cover trompil department inserts thermometer 41. Valves are arranged at the pressure measuring hole 241, the first pipe orifice 211, the second pipe orifice 212 and the water outlet of the water storage device 1.
When measuring the permeability of the non-cohesive soil sample, the semicircular cylinder 2 is connected and fastened through the bolt 213, the base 26 and the cylinder 2 are tightly installed, the metal pore plate 22 and the permeable cotton 23 are placed in the cylinder 2, the tested sample 21 is filled and compacted according to the JTG E40 standard requirement, the soil filling and compacting conditions can be accurately controlled through the transparent cylinder 2 and the scales on the cylinder 2, after the soil sample is filled in layers according to the JTG E40 standard, a piece of permeable cotton 23 is placed at the top to prevent the soil sample from being disturbed by the impact force of water, then the sealing cover 25 is installed, and the second pipe opening 212 is connected with the water seepage cup 4 through the rubber pipe. An external water source is connected to supply water to the water storage device 1, the water is boiled and the water temperature is adjusted to be 3-4 ℃ higher than the test environment temperature under the control of the display screen 11 and the temperature regulator 13, and the subsequent steps are carried out according to the test specification requirements to finish the soil body penetration test.
When measuring the permeability of the rock sample, the semicircular cylinder body 2 is preliminarily connected through the bolt 213, the metal pore plate 22 and the permeable cotton 23 are placed in the cylinder body 2 after the base 26 is installed, the rock sample 21 sleeved with the rubber sleeve is placed in the cylinder body 2, the bolt 213 is screwed to enable the rock to be tightly attached to the rubber sleeve and the cylinder body 2, the permeable cotton 23 is placed at the top of the rock sample 21 to prevent the soil sample from being disturbed by water impact force, the second pipe opening 212 is connected with the water seepage cup 4 through the rubber pipe, and the sealing cover 25 is installed. And (3) connecting an external water source to supply water to the water receiver 1, simultaneously opening the pressurizing device 3, and after pressurizing according to the test requirements, completing the rock permeability test according to the steps.
Claims (9)
1. A soil permeameter capable of applying confining pressure is characterized in that: including water supply installation, penetrant unit, supercharging device, the water supply installation below is connected with penetrant unit through the rubber tube, and penetrant unit's side is provided with supercharging device, and penetrant unit includes the barrel, and the barrel surface is provided with first graduation apparatus, and the barrel bottom is provided with the base that can dismantle the connection, and the inside metal orifice plate that is provided with of barrel, metal orifice plate top are provided with the cotton that permeates water, the barrel top is provided with the sealed lid that can dismantle the connection, has seted up a plurality of pressure taps with the fixed interval on the lateral wall between sealed lid and the metal orifice plate, is connected with the pressure-measuring pipe of fixing on the scale plate on the pressure tap, the first mouth of pipe that the upper portion of barrel set up passes through rubber tube and connects supercharging device, and the second mouth of pipe that the lower part of barrel set.
2. The confining pressure applicable soil permeameter according to claim 1, wherein: the water supply device comprises a water storage device, a heater is arranged in the water storage device, a temperature regulator is arranged on the inner wall of the water storage device, a display screen is arranged on the front face of the water storage device, and the temperature regulator is electrically connected with the display screen and the heater through conducting wires.
3. The confining pressure applicable soil permeameter according to claim 2, wherein: the barrel comprises two semicircular barrels which are detachably connected, the barrels are made of transparent materials, and the inner wall of the barrel is subjected to frosting treatment.
4. The confining pressure applicable soil permeameter according to claim 3, wherein: the joint of the two semicircular cylinders is provided with a sealing gasket.
5. The confining pressure applicable soil permeameter according to claim 1, wherein: the downthehole demountable installation of pressure cell has the filter stopper, is provided with the filter screen on the filter stopper.
6. The confining pressure applicable soil permeameter according to claim 1, wherein: the top of the water seepage cup is provided with a cup cover with a hole, and a thermometer is inserted into the hole of the cup cover.
7. The confining pressure applicable soil permeameter according to claim 2, wherein: the display screen is a touch display screen.
8. The confining pressure applicable soil permeameter according to claim 7, wherein: valves are arranged at the pressure measuring hole, the first pipe orifice, the second pipe orifice and the water outlet of the water storage device.
9. The confining pressure applicable soil permeameter according to claim 8, wherein: the thickness of the permeable cotton is 2cm, and the diameter of the permeable cotton is larger than the inner diameter of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021862508.XU CN212844908U (en) | 2020-08-31 | 2020-08-31 | Soil permeameter capable of applying confining pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021862508.XU CN212844908U (en) | 2020-08-31 | 2020-08-31 | Soil permeameter capable of applying confining pressure |
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| CN212844908U true CN212844908U (en) | 2021-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397237A (en) * | 2022-01-19 | 2022-04-26 | 成都理工大学 | Water bath type temperature control variable water head seepage instrument and method for testing permeability by using same |
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2020
- 2020-08-31 CN CN202021862508.XU patent/CN212844908U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397237A (en) * | 2022-01-19 | 2022-04-26 | 成都理工大学 | Water bath type temperature control variable water head seepage instrument and method for testing permeability by using same |
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