CN108279199B - High-stress osmometer device - Google Patents
High-stress osmometer device Download PDFInfo
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- CN108279199B CN108279199B CN201810346827.6A CN201810346827A CN108279199B CN 108279199 B CN108279199 B CN 108279199B CN 201810346827 A CN201810346827 A CN 201810346827A CN 108279199 B CN108279199 B CN 108279199B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 188
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 66
- 238000007596 consolidation process Methods 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 abstract description 14
- 238000001764 infiltration Methods 0.000 abstract description 5
- 230000008595 infiltration Effects 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract 2
- 230000035515 penetration Effects 0.000 description 20
- 230000035699 permeability Effects 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a high-stress osmometer device, wherein a rigid base is connected with a loading frame, through holes in the rigid base are respectively connected with a water inlet pipe, a water inlet pipe valve, an exhaust hole and an exhaust hole valve, a lower water permeable plate is respectively connected with the rigid base, the water inlet pipe and the water inlet pipe valve, the upper part of a protective ring is connected with a rigid upper cover, the lower part of the protective ring is connected with the rigid base, the rigid upper cover is pressed on the upper water permeable plate, through holes in the rigid upper cover are respectively connected with a water outlet pipe and a water outlet pipe valve, an oil cylinder is connected with the loading frame, the lower part of the oil cylinder is connected with the rigid upper cover, a shaft pressure sensor is connected with the oil cylinder, a displacement sensor is connected with the rigid upper cover and the rigid base, the hole pressure sensor is connected with a lower water permeable plate 4 through the rigid base, a water head measuring device is connected with the water inlet pipe, and a water outlet flow device is connected with the water outlet pipe. Simple structure, convenient to use has realized the accurate measurement of simultaneously carrying out to the infiltration of tailing material and consolidation test under the high stress condition.
Description
Technical Field
The invention relates to the technical field of rock-soil material permeability and consolidation state testing equipment under the condition of high stress, in particular to a high-stress osmometer device which is suitable for testing a wide permeability coefficient range (10) 1 ~10 -8 cm/s）。
Background
The tailing dam is an important facility for the capital construction of various concentrating mills and thermal power plants in the metallurgical industry, and is an important link for ensuring the normal production of various concentrating mills and thermal power plants. With the improvement of the mineral separation technology and the increasing maturity of the tailing dam piling technology, the tailing dam tends to be fine-grained and high-dam. The mechanical properties of the tailings under high stress state can change significantly, and it is necessary to perform an indoor test of basic physical properties of the tailings material under high stress. The permeability of the tailing material is a key parameter affecting the infiltration line of the tailing dam body, and further affects the stability of the tailing dam body to a great extent. The consolidation state affects the values of the mechanical parameters c and c of the tailing materials to a great extent, thereby affecting the dam strength. Therefore, the permeability parameter and consolidation parameter of the tailing materials under the condition of high stress are accurately obtained, and the method plays a vital role in the development of tailing dams and geotechnical engineering. However, most of the current penetration instrument testing principles are simple and unitary, high stress cannot be applied to the sample, penetration tests and consolidation tests are respectively measured on different experimental instruments, constant head penetration tests and variable head penetration tests in the penetration tests are respectively measured on different experimental instruments, and the instrument precision for accurately measuring the long-time penetration and consolidation of fine-grained materials cannot be achieved. In order to solve the problem of incomplete infiltration consolidation test, the invention realizes accurate measurement of constant and variable water head infiltration and consolidation tests of the tailing materials under the condition of high stress, and conforms to the development direction of fine grains and high dams of the tailing dam.
Disclosure of Invention
The invention aims to provide a high-stress measuring permeation and consolidation test device for rock-soil materials such as tailings. The device has the advantages of simple structure, convenient use, accurate measurement result and large testing range, and realizes that the constant and variable water head penetration tests and the consolidation tests of rock and soil materials such as tailings and the like under the condition of high stress are carried out on the same instrument.
In order to achieve the above object, the present invention adopts the following technical measures:
a high stress osmometer device, comprising: the device comprises a rigid base, an exhaust hole valve, a lower water permeable plate, a sample, a sheath, a cutting ring, a guard ring, an upper water permeable plate, a rigid upper cover, a loading frame, an oil cylinder, a shaft pressure sensor, a displacement sensor, an orifice pressure sensor, a water inlet pipe valve, a measuring scale, a water outlet pipe valve, a water head measuring device, a constant water head pipe valve, a water outlet flow measuring device, a servo oil source and an oil source valve. The method is characterized in that: the rigid base is connected with the loading frame, the through holes in the rigid base 1 are respectively connected with the water inlet pipe, the water inlet pipe valve, the air outlet hole and the air outlet hole valve, the lower water permeable plate is respectively connected with the rigid base, the water inlet pipe and the water inlet pipe valve, the sheath is arranged between the rigid base and the guard ring, the ring knife is wrapped on the side face of the sample, and the guard ring is wrapped on the ring knife sampleThe side, the shroud upper portion is connected with the rigidity upper cover, the shroud lower part is connected with the rigidity base, the rigidity upper cover is pressed on the upper water permeable plate, the perforating is connected outlet pipe, outlet pipe valve respectively in the rigidity upper cover, be connected with loading frame on the hydro-cylinder, be connected with the rigidity upper cover under the hydro-cylinder, the axle pressure sensor is connected with the hydro-cylinder, displacement sensor connects and is connected at rigidity upper cover and rigidity base, pore pressure sensor is connected with lower water permeable plate 4 through the rigidity base, the measurement scale cover is on loading frame, the water head measuring device is connected with the inlet tube, on constant head pipe and constant head pipe valve connect the inlet tube, the water flow device is connected with the outlet pipe, the hydraulic system of device is as shown in figure 2: the servo oil source is controlled by an oil source valve, and a series of three servo oil sources are respectively connected to the oil cylinders of three devices with different volumes. The servo oil source 25 is respectively connected with the first cylinder valve and the container V through servo valves Big size The oil cylinders in the device are connected, and a second oil cylinder valve and a container V In (a) The oil cylinders in the device are connected, and a third oil cylinder valve and a container V Small size The oil cylinders are connected.
The oil cylinder and the shaft pressure sensor are connected between the rigid upper cover and the loading frame.
The displacement sensor is connected with the lower water permeable plate through the rigid base 1.
The loading frame is respectively connected with the oil cylinder and the rigid base.
The displacement sensor is respectively connected with the rigid upper cover and the rigid base.
The measuring scale is sleeved on the vertical rod of the loading frame.
The water outlet pipe and the water outlet pipe valve are connected from the rigid upper cover, and the water outlet pipe valve has the function of enabling water passing through the sample to flow into the water outlet measuring device for subsequent osmotic coefficient calculation.
The constant water head pipe and the valve of the constant water head pipe are connected to the water inlet pipe.
The connection and function of the other components are described below: the rigid base is connected with the loading frame and is used for providing counter force when the oil cylinder is pressurized. The through holes in the rigid base are respectively connected with a water inlet pipe, a water inlet pipe valve, an exhaust hole and an exhaust hole valve, and are respectively used for allowing water to enter the instrument from the water inlet pipe valve and pass through a sample during a high-stress penetration test; and in order to prevent air in the instrument from influencing the test result, the vent hole and the vent hole valve are used for exhausting the air in the instrument.
The lower water permeable plate is respectively connected with the rigid base, the water inlet pipe and the water inlet pipe valve, and the lower water permeable plate is used for transmitting axial force and allowing water passing through the water inlet pipe and the water inlet pipe valve to pass through, and the cylindrical shape of the sample is kept unchanged, so that the accuracy of calculation after the test is ensured. The sheath is arranged between the rigid base 1 and the guard ring, the outer diameter is unchanged, and the sheath is divided into a plurality of models with different inner diameters so as to adapt to samples with different sizes. The function is to determine the position of the guard ring to adapt to samples with different sizes; the ring knife wraps the side surface of the sample, and the ring knife is used for preventing the sample from loosening and keeping the cylindrical shape of the sample together with the lower water permeable plate and the upper water permeable plate. The guard ring is wrapped on the side face of the ring cutter sample, and has the function of limiting the lateral deformation of the sample, so that preconditions are provided for subsequent calculation; the upper part of the guard ring is connected with the rigid upper cover, and the lower part of the guard ring is connected with the rigid base, so that the container is sealed. The rigid upper cover is pressed on the upper water permeable plate and is used for transmitting axial force; the through holes in the rigid upper cover are respectively connected with a water outlet pipe and a water outlet pipe valve, and are used for discharging water out of the container through the sample during a high-stress penetration test. The upper part of the oil cylinder is connected with the loading frame, and the lower part of the oil cylinder is connected with the rigid upper cover, so that the axial pressure of the sample is provided, the maximum axial stress can reach 10MPa, and the sample is in an axial high-stress state so as to meet the test requirement. The axial pressure sensor is connected with the oil cylinder and can directly display the magnitude of axial stress. The displacement sensor is connected with the rigid upper cover and the rigid base, and is used for measuring the relative displacement of the rigid base and the rigid upper cover, namely the axial deformation of the sample during the high-stress consolidation test. The pore pressure sensor is connected with the lower water permeable plate through the rigid base and is used for measuring pore water pressure. The measuring scale is sleeved on the loading frame and is used for measuring the water head height of the water outlet pipe. The water head measuring device is connected with the water inlet pipe and is used for measuring the change of the water head during the high-stress penetration test and used for subsequent calculation. The constant water head pipe and the valve of the constant water head pipe are connected with the water inlet pipe, and the constant water head pipe and the valve of the constant water head pipe are used for keeping the water head unchanged when the constant water head permeation test is carried out. The water outlet flow device is connected with the water outlet pipe and is used for measuring the water outlet flow, and the hydraulic system of the device is shown in fig. 2: the servo oil source is controlled by an oil source valve, and the oil source is connected to the oil cylinders of the three devices with different volumes in series, and the servo oil source is used for providing axial pressure for the devices with the large volume, the medium volume and the small volume respectively.
Through the technical measures: A. the axial compression device can realize accurate measurement of the permeation and consolidation parameters of the rock-soil materials under the condition of high stress. B. The hydraulic system is respectively connected with three instruments (shown in figure 2) with different volumes, so that the invention can realize the measurement of permeability coefficients in different ranges, and the three instruments can simultaneously operate by sharing the same pressurizing system, thereby greatly shortening the test time. C. The constant water head pipe and the constant water head pipe valve are connected to the water inlet pipe, so that the constant water head pipe valve can be switched to realize the constant water head permeation test and the variable water head permeation test on the same instrument. The cost is greatly saved. D. The three sizes of the sheath directly determine the volume of the container, and the adjustment is simple, convenient and quick. E. The sample can generate axial deformation under the action of high stress, so that the water head during water outlet is changed. The arrangement of the scale will solve this problem, making the measurement result more accurate.
The main differences between the technical scheme and the prior art are as follows: A. and high-stress penetration and consolidation tests are realized. B. The penetration and consolidation test is carried out on the same instrument. C. The constant water head penetration test and the variable water head penetration test are carried out on the same instrument.
Compared with the prior art, the invention has the following advantages and effects:
1) Accurate measurement of the seepage and consolidation parameters of the tailing materials under the condition of high stress is realized.
2) The penetration test and the consolidation test are measured on the same test instrument.
3) The constant head permeation test and the variable head permeation test are measured on the same test instrument.
4) Can respectively measure samples with larger difference of permeation and consolidation coefficients. Multiple samples can be tested simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a high stress osmometer device.
Fig. 2 is a schematic diagram of a hydraulic system connected to 3 testers of different sizes, respectively.
The names corresponding to the reference numerals in the figures are: 1-rigid base, 2-vent, 3-vent valve (ordinary), 4-lower water permeable plate, 5-sample, 6-sheath, 7-ring knife, 8-grommet, 9-upper water permeable plate, 10-rigid upper cover, 11-loading rack, 12-cylinder, 13-axle pressure sensor (ZSL-A type and ZLF-A type spoke type (200 KN)), 14-displacement sensor (JINAKAISI KS15 series), 15-hole pressure sensor (ZSL-A type and ZLF-A type spoke type (40 KN)), 16-water inlet pipe, 17-water inlet pipe valve (ordinary), 18-measuring scale, 19-water outlet pipe, 20-water outlet pipe valve (ordinary), 21-water head measuring device (scale), 22-constant head pipe, 23-constant head pipe valve (ordinary), 24-water outlet flow measuring device (flowmeter), 25-servo oil source (10 MCY-Y2-132S-4), 26-oil source valve (ordinary), 27-first cylinder valve (ordinary), 28-second cylinder valve (ordinary), and third cylinder valve (ordinary 29-ordinary).
V in the figure Big size 、V In (a) And V Small size A high stress osmometer apparatus as in figure 1 except that the container is sized differently to accommodate samples of different permeability and consolidation coefficients. Wherein V is Big size The size was 150 Xh 150mm, and it was recommended to measure the permeability coefficient 10 1 -10 - 2 cm/s of sample, wherein V In (a) The size was phi 100 Xh 100mm, and it was recommended to measure the permeability coefficient 10 -2 -10 -5 cm/s of sample, wherein V Small size The size was phi 50 Xh 50mm, and it was recommended to measure the permeability coefficient 10 -5 -10 -9 cm/s, and can test three samples simultaneously, thus greatly shortening the test time.
Detailed Description
Example 1:
the invention is further elaborated with reference to the following drawings:
as can be seen from fig. 1, a high stress osmometer device comprises a rigid base 1, an exhaust hole 2, an exhaust hole valve 3, a lower water permeable plate 4, a sample 5, a sheath 6, a cutting ring 7, a guard ring 8, an upper water permeable plate 9, a rigid upper cover 10, a loading frame 11, an oil cylinder 12, an axial pressure sensor 13, a displacement sensor 14, an aperture pressure sensor 15, a water inlet pipe 16, a water inlet pipe valve 17, a measuring scale 18, a water outlet pipe 19, a water outlet pipe valve 20, a water head measuring device 21, a constant water head pipe 22, a constant water head pipe valve 23, a water outlet flow measuring device 24, a servo oil source 25, an oil source valve 26, a first servo valve 27, a second servo valve 28 and a third servo valve 29, and a high stress osmometer device, and is characterized in that: the rigid base 1 is connected to a loading frame 11 for providing a counter force when the cylinder 12 is pressurized. The perforation in the rigid base 1 is respectively connected with the water inlet pipe 16 and the water inlet pipe valve 17, the air exhaust hole 2 and the air exhaust hole valve 3, and is respectively used for allowing water to enter the instrument from the water inlet pipe 16 and the water inlet pipe valve 17 to pass through the sample 5 during a high stress penetration test; and in order to prevent air in the instrument from influencing the test result, the vent hole 2 and the vent hole valve 3 are used for exhausting the air in the instrument.
The lower water permeable plate 4 is respectively connected with the rigid base 1, the water inlet pipe 16 and the water inlet pipe valve 17, and has the functions of transmitting axial force, allowing water passing through the water inlet pipe 16 and the water inlet pipe valve 17 to pass through, keeping the cylindrical shape of the sample 5 unchanged and ensuring the accuracy of calculation after the test.
The sheath 6 is arranged between the rigid base 1 and the guard ring 8, has unchanged outer diameter and is divided into a plurality of models with different inner diameters so as to adapt to samples with different sizes. The function of which is to position the grommet 8 to accommodate samples of different sizes
The ring 7 is wrapped around the sides of the sample 5 and serves to prevent the sample from loosening and to maintain the cylindrical shape of the sample together with the lower 4 and upper 9 water permeable plates.
The guard ring 8 wraps the side face of the ring cutter sample and has the function of limiting the lateral deformation of the sample, so that preconditions are provided for subsequent calculation; the upper part of the grommet 7 is connected to the rigid upper cover 10 and the lower part of the grommet 7 is connected to the rigid base 1, which functions to form a container seal.
The rigid upper cover 10 is pressed on the upper water permeable plate 9 and is used for transmitting axial force; the perforations in the rigid upper cover 10 are respectively connected with a water outlet pipe 19 and a water outlet pipe valve 20, and are used for discharging water out of the container through the sample 5 during a high-stress penetration test.
The oil cylinder 12 and the servo oil source 25 are respectively connected with a first oil cylinder valve 27 and a container V through servo valves Big size Is connected to cylinder 12A, second cylinder valve 28 and vessel V In (a) The cylinder 12B in the middle is connected with a third cylinder valve 29 and a container V Small size Is connected with the cylinder 12C. The upper part of the oil cylinder 12 is connected with the loading frame 11, and the lower part of the oil cylinder 12 is connected with the rigid upper cover 10, so that the axial pressure of the sample is provided, the maximum axial stress can reach 10MPa, and the sample is in an axial high-stress state so as to meet the test requirement. The axial pressure sensor 13 is connected with the oil cylinder 12 and can directly display the magnitude of axial stress.
The displacement sensor 14 is connected to the rigid upper cover 10 and the rigid base 1, and is used for measuring the relative displacement of the rigid base 1 and the rigid upper cover 10, namely the axial deformation of the test sample 5 during the high-stress consolidation test.
The pore pressure sensor 15 is connected with the lower water permeable plate 4 through the rigid base 1, and is used for measuring pore water pressure.
The measuring scale 18 is sleeved on the loading frame 11 and is used for measuring the water head height of the water outlet pipe 19.
The head measuring device 21 is connected to the inlet pipe 16 and functions to measure the head change during high stress penetration tests for subsequent calculations.
The constant head pipe 22 and the constant head pipe valve 23 are connected to the water inlet pipe 16, and function to keep the head unchanged when the constant head permeation test is performed.
The water outlet flow device 24 is connected with the water outlet pipe 19 and is used for measuring the water outlet flow.
The invention increases the supply of high stress, realizes the accurate measurement of the permeation and consolidation test of the tailing materials under the condition of high stress, integrates the constant and variable water head permeation test and the consolidation test, and greatly simplifies the prior segmentation.
Through the technical measures:
1. the oil cylinder 12 enables the invention to realize accurate measurement of the infiltration and consolidation parameters of the geotechnical material under high stress.
2. The servo oil sources 25 are respectively connected with the oil cylinders (shown in figure 2) on three instruments with different volumes, so that the invention can realize the measurement of the permeability coefficients in different ranges, and the three instruments can simultaneously operate by sharing the same pressurizing system, thereby greatly shortening the test time.
3. The constant water head pipe 22 and the constant water head pipe valve 23 are connected to the water inlet pipe 16, so that the constant water head pipe valve 23 can be opened and closed to realize the conversion between the constant water head permeation test and the variable water head permeation test on the same instrument. The cost is greatly saved.
4. The three sizes of the sheath 6 directly determine the volume of the container, and the adjustment is simple, convenient and quick.
5. The specimen 5 is deformed axially by the high stress, thereby changing the water head at the time of water discharge. The provision of the scale 18 will solve this problem, making the measurement more accurate.
By the technical measures of the invention, the following tests are carried out:
(1) High stress tailing penetration test (variable head test)
The present invention is a hydraulic system with three vessels tested, here in V Big size For template description, the remaining container methods are similar.
The vent valve 3, the water inlet valve 17 and the constant water head valve 23 are opened, and the bubble remained at the bottom is removed by using airless water. And the lower water permeable plate 4 is saturated with airless water. A thin filter paper is placed on the lower water permeable plate 4 until no bubbles are emitted from the air exhaust holes 2.
Will be suitable for V Big size The sheath 6 of the test piece is arranged, a ring knife with the test piece is put into the guard ring and is pressed into the sealing ring, and the upper part and the lower part of the guard ring are respectively connected with the rigid upper cover 10 and the rigid base 1. And then the oil cylinder 12, the shaft pressure sensor 13 and the loading frame 11 are connected.
Opening valves K0 and V of hydraulic system Big size Valve K1, observing the shaft pressure sensor 13 until it is addedThe pressurization is stopped when the shaft pressure is needed. The state of the axial pressure is maintained. The measuring scale 18 is moved to measure the height of the water outlet head.
The exhaust valve 3 is closed, and the water inlet pipe valve 17 and the water outlet pipe valve 19 are opened. The water is filled in the water inlet pipe 16 and injected into the container, and the container is kept stand for a period of time under the action of a certain water head, and when the water outlet pipe 18 overflows, the test measurement is started.
(2) High stress tailing penetration test (constant head test)
The present invention is a hydraulic system with three vessels tested, here in V Big size For template description, the remaining container methods are similar.
The vent valve 3, the water inlet valve 17 and the constant water head valve 23 are opened, and the bubble remained at the bottom is removed by using airless water. And the lower water permeable plate 4 is saturated with airless water. A thin filter paper is placed on the lower water permeable plate 4 until no bubbles are emitted from the air exhaust holes 2.
Will be suitable for V Big size The sheath 6 of the test piece is arranged, a ring knife with the test piece is put into the guard ring and is pressed into the sealing ring, and the upper part and the lower part of the guard ring are respectively connected with the rigid upper cover 10 and the rigid base 1. And then the oil cylinder 12, the shaft pressure sensor 13 and the loading frame 11 are connected.
Opening valves K0 and V of hydraulic system Big size Valve K1, the shaft pressure sensor 13 is observed and the pressurization is stopped until the pressurization is required. The state of the axial pressure is maintained. The measuring scale 18 is moved to measure the height of the water outlet head.
The exhaust valve 3 is closed, and the water inlet pipe valve 17 and the water outlet pipe valve 19 are opened. The valve 23 is opened to fill the water inlet pipe 16 with water, and the water is injected into the container, and the container is kept stand for a period of time under the action of a certain water head, and when the water outlet pipe 18 overflows, the test measurement is started.
(3) High stress tailing consolidation test
The present invention is a hydraulic system with three vessels tested, here in V Big size For template description, the remaining container methods are similar.
The vent valve 3 and the water inlet valve 17 are opened, and residual bubbles at the bottom are removed by airless water. And the lower water permeable plate 4 is saturated with airless water. A thin filter paper is placed on the lower water permeable plate 4 until no bubbles are emitted from the air exhaust holes 2.
The ring knife with the sample is put into the guard ring and pressed into the sealing ring, and the upper and lower parts of the ring knife are respectively connected with the rigid upper cover 10 and the rigid base 1. And then the oil cylinder 12, the shaft pressure sensor 13 and the loading frame 11 are connected.
Closing the exhaust hole valve 3, installing a displacement sensor 13 and a hole pressure sensor 14, and opening the hydraulic system valves K0 and V Big size Valve K1 applies a set pressure of 1KPa to sample 5 and then adjusts the initial or zero readings of displacement sensor 13 and pore pressure sensor 14.
The loading is continued until the desired axial stress value or strain. When the axial direction is completed, the pore water pressure is dissipated under the condition that the axial load is unchanged or deformation is unchanged.
Claims (1)
1. The utility model provides a high stress osmometer device, includes rigid base (1), lower water permeable plate (4), sheath (6), cutting ring (7), go up water permeable plate (9), add loading frame (11), hydro-cylinder (12), axle pressure sensor (13), displacement sensor (14), hole pressure sensor (15), inlet tube (16), outlet pipe (19), outlet pipe valve (20), water head measuring device (21), play water flow measuring device (24), its characterized in that: the rigid base (1) is connected with the loading frame 11, the through holes in the rigid base (1) are respectively connected with the water inlet pipe (16), the water inlet pipe valve (17), the air outlet hole (2) and the air outlet hole valve (3), the lower water permeable plate (4) is respectively connected with the rigid base (1) and the water inlet pipe (16) and the water inlet pipe valve (17), the sheath (6) is arranged between the rigid base (1) and the guard ring (8), the ring knife (7) is wrapped on the side surface of the sample (5), the guard ring (8) is wrapped on the side surface of the ring knife, the upper part of the guard ring (8) is connected with the rigid upper cover (10), the lower part of the guard ring (8) is connected with the rigid base (1), the rigid upper cover (10) is pressed on the upper water permeable plate (9), the through holes in the rigid upper cover (10) are respectively connected with the water outlet pipe (19) and the water outlet pipe valve (20), the oil cylinder (12) is connected with the loading frame (11), the oil cylinder (12) is connected with the rigid upper cover (10), the shaft pressure sensor (13) is connected with the oil cylinder (12), the displacement sensor (14) is connected with the rigid upper cover (1) and the rigid upper cover (1) through the rigid upper cover (1) and the rigid upper measuring scale (15), the water head measuring device (21) is connected with the water inlet pipe (16), the constant water head pipe (22) and the constant water head pipe valve (23) are connected with the water inlet pipe (16), and the water outlet flow measuring device (24) is connected with the water outlet pipe (19);
the oil cylinder (12) and the shaft pressure sensor (13) are connected between the rigid upper cover (10) and the loading frame (11); the displacement sensor (14) is connected with the lower water permeable plate (4) through the rigid base (1), the loading frame (11) is respectively connected with the oil cylinder (12) and the rigid base (1), and the displacement sensor (14) is respectively connected with the rigid upper cover (10) and the rigid base (1);
the measuring scale (18) is sleeved on a vertical rod of the loading frame (11), the oil cylinder (12) and the servo oil source (25) are respectively connected with a first oil cylinder valve (27) and a first oil cylinder (12A) in a container V through a servo valve (26), a second oil cylinder valve (28) and a second oil cylinder (12B) in the container V, and a third oil cylinder valve (29) and a third oil cylinder (12C) in a container V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810346827.6A CN108279199B (en) | 2018-04-18 | 2018-04-18 | High-stress osmometer device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810346827.6A CN108279199B (en) | 2018-04-18 | 2018-04-18 | High-stress osmometer device |
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| CN108279199A CN108279199A (en) | 2018-07-13 |
| CN108279199B true CN108279199B (en) | 2024-02-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110243726B (en) * | 2019-05-31 | 2020-06-16 | 山东科技大学 | Testing device and testing method for wetting characteristics of coal particles containing gas |
| CN110736692A (en) * | 2019-11-04 | 2020-01-31 | 三峡大学 | automatic device and method for measuring permeability coefficient of soil body |
| CN112816383B (en) * | 2020-12-28 | 2024-08-13 | 宁波市华欣建材测试有限公司 | Penetrometer |
| CN112859945B (en) * | 2021-01-15 | 2022-06-17 | 四川大学 | Calibration platform pore pressure control system and control method thereof |
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