CN108593517B - Device and method for measuring permeability coefficient of viscous soil body - Google Patents
Device and method for measuring permeability coefficient of viscous soil body Download PDFInfo
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- CN108593517B CN108593517B CN201810340149.2A CN201810340149A CN108593517B CN 108593517 B CN108593517 B CN 108593517B CN 201810340149 A CN201810340149 A CN 201810340149A CN 108593517 B CN108593517 B CN 108593517B
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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
Abstract
The invention discloses a device and a method for measuring permeability coefficient of a viscous soil body. The device comprises a detector, a liner tube, a sieve leakage tube, a bottom tray, an air valve, a compressor, a directional valve, a pressure gauge, an extension rod and a lifting rope; the sieve leakage pipe is sleeved in the liner pipe, the bottom tray is arranged at the lower end part of the sieve leakage pipe, the detector is placed in the liner pipe and is positioned at the upper end part of the sieve leakage pipe, the pressure gauge, the air valve, the directional valve and the compressor are sequentially connected onto the detector through the air guide pipe, the extension rod is arranged on the push rod of the detector, and the lifting rope is tied onto the change-over switch on the detector. Compared with the conventional measuring equipment, the invention does not need a water pumping or water injection device, utilizes the balance water pipe to automatically regulate the pressure, realizes static balance of the water pressure before measurement, can greatly shorten the measuring time, adopts the pressure sensor and the recorder to record the change process of the water pressure along with the time in real time, and improves the accuracy of the test. The device is characterized by convenient carrying, simple operation and high measurement efficiency.
Description
Technical Field
The invention relates to the field of geotechnical engineering rock-soil body parameter measurement, in particular to a device for measuring permeability coefficient of a viscous soil body and a use method thereof.
Background
The permeability coefficient is an important index for measuring the permeability of a rock-soil body, and is generally measured by an on-site water pumping method or a water injection method. The two methods have the advantages that water pumping or water injection is needed for measurement, the testing process is complex, more manpower and material resources are needed, the permeability coefficient of a viscous soil body is low, the time for water pressure dissipation is long, the corresponding testing time is long, and inconvenience is brought to engineering practice. In addition, due to variability of the permeability coefficient, the permeability coefficient of different parts is changed, and the measurement range of the water pumping method or the water injection method is large, the obtained permeability coefficient is the average value of the permeability coefficient in the whole measurement range, and the non-uniformity of the permeability coefficient cannot be reflected. With the development of technology, the sensor is widely applied, and the pressure sensor and the digital processing technology are also suitable for the development of modern technology.
Disclosure of Invention
The invention aims to overcome the defects of the conventional test equipment and provide a device and a method for measuring the permeability coefficient of a viscous soil body for rapidly testing the permeability coefficient of the viscous soil body on site.
The device for measuring the permeability coefficient of the viscous soil body comprises a detector, a liner tube, a sieve leakage tube, a bottom tray, an air valve, a compressor, a directional valve, a pressure gauge, an extension bar and a lifting rope; the sieve leakage pipe is sleeved in the liner pipe, the bottom tray is arranged at the lower end part of the sieve leakage pipe, the detector is placed in the liner pipe and is positioned at the upper end part of the sieve leakage pipe, the pressure gauge, the air valve, the directional valve and the compressor are sequentially connected onto the detector through the air guide pipe, the extension rod is arranged on the push rod of the detector, and the lifting rope is tied onto the change-over switch on the detector.
The detector comprises a pressure sensor, an end cover, a balance water pipe, an inner liner pipe, a rubber air bag, a flange, a tightening hoop, a sealing gasket, a backstop nut, a change-over switch, a lip-shaped sealing ring, a push rod, a recorder, an air inlet pipe, a sealing nut, a gasket, a sealing plug, a transmission line and an O-shaped sealing ring; the pressure sensor is arranged on the end cover and is connected with the recorder through a transmission line, a sealing plug is arranged in a hole of the transmission line passing through the flange, the inner liner pipe is arranged in the rubber air bag, two clamping rings are arranged at two ends of the inner liner pipe to tightly clamp the rubber air bag on the inner liner pipe, the flange and the end cover are respectively arranged at the upper port and the lower port of the inner liner pipe, a pair of O-shaped sealing rings are respectively arranged on the outer cylindrical surfaces of the flange and the end cover, a lip-shaped sealing ring is respectively arranged in the central holes of the flange and the end cover, two ends of the balance water pipe are respectively fixed on the flange and the end cover through two retaining nuts, sealing gaskets are respectively arranged at the contact surfaces of the two ends of the balance water pipe, a change-over switch is arranged at the upper port of the balance water pipe, the push rod penetrates through the central holes of the flange and the end cover, the air inlet pipe is arranged on the flange through the sealing nuts and the gaskets, one port is arranged outside, and the other port extends into the inner liner pipe.
Preferably, the liner tube, the sieve leakage tube and the bottom tray are assembled into a tube pressing assembly before measurement; the lining pipe is sleeved outside the sieve leakage pipe, the bottom tray is arranged at the bottom end of the sieve leakage pipe, and the bottom tray and the inner hole of the sieve leakage pipe form interference fit, so that the sieve leakage pipe can bear larger thrust and cannot deviate from; when the assembled pipe pressing assembly is placed into the drilled hole, the pipe pressing assembly can enter the preset depth of the hole as long as a certain pressure is applied to the liner tube, the liner tube pushes the bottom tray, the bottom tray drives the sieve leakage pipe to move downwards; the sieve leakage pipe is provided with small holes distributed on the cylindrical surface of the pipe, water can pass through, but large sand grains can not pass through.
The using method of the device for measuring the permeability coefficient of the viscous soil body comprises the following steps:
1) Drilling and pressing a pipe: firstly, assembling a liner tube, a screen leakage tube and a bottom tray into a tube pressing assembly, drilling holes in soil to be measured, pressing the tube pressing assembly into the drilled holes, carrying out back lifting on the liner tube to a preset depth, fixing the position of the liner tube, backfilling coarse sand grains around the screen leakage tube of the original drilling hole, and backfilling cement paste around the liner tube;
2) The detector is in place: placing a detector communicated with an inflation system into a pre-buried liner tube, placing the detector on a sieve leakage tube, starting a compressor, inflating the detector, gradually opening a rubber air bag, blocking a gap between the air bag with an abdominal distention and the liner tube, forming a closed cavity at a position below the detector until the reading of a pressure gauge reaches a preset value, and stopping the compressor;
3) Water level recovery: after the detector is inflated, the water level to be affected is restored for 3-5 minutes, so that the water pressure of the upper end surface and the lower end surface of the detector is balanced, and then the lifting rope is pulled, so that the change-over switch is in a closed state;
4) Pressing a push rod: standing for 3-5 minutes, pushing a push rod after the water pressure in the sieve leakage pipe and the water pressure between the sieve leakage pipe are balanced, and downwards extruding water in the sieve leakage pipe by the push rod, wherein the pressed water permeates into soil through the sieve leakage pipe;
5) And (3) data processing: the pressure sensor transmits the measured water pressure value to the recorder in real time, the recorder stores the pressure value, and the permeability coefficient of the measured soil mass is calculated according to a preset algorithm.
The invention provides a device for measuring permeability coefficient of a viscous soil body, which is characterized by rapid measurement and portability compared with conventional test equipment. The invention omits a water injection device, does not need to pump water or inject water at the test point, and simplifies the test process; automatic pressure regulation is carried out by using a balance water pipe, so that static balance of the water pressure before measurement is realized; the pressure sensor and the recorder are cited, the change process of the water pressure along with the time is recorded in real time, and the testing accuracy is improved; the push rod small-area pressurization method is adopted, so that the change range of water pressure in the test process is small, the water pressure can be dissipated in a short time, and the test time is shortened. Through the integration to functions such as shutoff and pressurization, equipment is simple, portable, easy and simple to handle more high-efficient.
Drawings
FIG. 1 is a schematic structural diagram of a device for measuring permeability coefficient of a viscous soil body;
FIG. 2 is a schematic diagram of a detector structure;
FIG. 3 is a schematic illustration of a crimp assembly;
FIG. 4 is a schematic cross-sectional view of a flange;
in the figure: the detector 1, the liner tube 2, the sieve drain tube 3, the bottom tray 4, the air valve 5, the compressor 6, the direction valve 7, the pressure gauge 8, the extension rod 9, the lifting rope 10, the pressure sensor 11, the end cover 12, the balance water pipe 13, the inner liner tube 14, the rubber air bag 15, the flange 16, the clamping ring 17, the sealing gasket 18, the retaining nut 19, the change-over switch 20, the lip-shaped sealing ring 21, the push rod 22, the recorder 23, the air inlet pipe 24, the sealing nut 25, the gasket 26, the sealing plug 27, the transmission line 28 and the O-shaped sealing ring 29.
Detailed Description
As shown in fig. 1, the device for measuring the permeability coefficient of the viscous soil mass comprises a detector 1, a liner tube 2, a sieve leakage tube 3, a bottom tray 4, an air valve 5, a compressor 6, a directional valve 7, a pressure gauge 8, an extension rod 9 and a lifting rope 10; the sieve leakage pipe 3 is sleeved in the liner pipe 2, the bottom tray 4 is arranged at the lower end part of the sieve leakage pipe 3, the detector 1 is placed in the liner pipe 2 and positioned at the upper end part of the sieve leakage pipe 3, the pressure gauge 8, the air valve 5, the directional valve 7 and the compressor 6 are sequentially connected to the detector 1 through air ducts, the extension rod 9 is arranged on a push rod of the detector 1, and the lifting rope 10 is tied to the change-over switch 20 of the detector 1.
As shown in fig. 2, the detector comprises a pressure sensor 11, an end cover 12, a balance water pipe 13, an inner bile duct 14, a rubber air bag 15, a flange 16, a tightening ring 17, a sealing gasket 18, a backstop nut 19, a change-over switch 20, a lip sealing ring 21, a push rod 22, a recorder 23, an air inlet pipe 24, a sealing nut 25, a gasket 26, a sealing plug 27, a transmission line 28 and an O-shaped sealing ring 29; the pressure sensor 11 is arranged on the end cover 12 and is connected with the recorder 23 through a transmission line 28, a sealing plug 27 is arranged in a hole of the transmission line 28 passing through the flange 16, the inner liner tube 14 is arranged in the rubber air bag 15, two clamping rings 17 are arranged at two ends of the inner liner tube 14 to tightly clamp the rubber air bag 15 on the inner liner tube 14, the flange 16 and the end cover 12 are respectively arranged at the upper port and the lower port of the inner liner tube 14, a pair of O-shaped sealing rings 29 are respectively arranged on the outer cylindrical surfaces of the flange 16 and the end cover 12, a lip-shaped sealing ring 21 is respectively arranged in the central holes of the flange 16 and the end cover 12, two ends of the balance water tube 13 are respectively fixed on the flange 16 and the end cover 12 through two retaining nuts 19, sealing gaskets 18 are respectively arranged at the contact surfaces of the two ends of the balance water tube 13, a change-over switch 20 is arranged at the upper port of the balance water tube 13, a push rod 22 passes through the central holes of the flange 16 and the end cover 12, the inner liner tube 24 penetrates through the upper port and the lower port, the flange 16 is arranged on the flange 16, one port is arranged outside, and the other port extends into the inner liner tube 14.
As shown in fig. 3, the liner tube 2, the screen leakage tube 3 and the bottom tray 4 are assembled into a tube pressing assembly before measurement; the lining pipe is sleeved outside the screen leakage pipe 3, the bottom tray 4 is arranged at the bottom end of the screen leakage pipe 3, when the pipe pressing component is placed in a drilled hole, only a certain pressure is applied to the lining pipe 2, the lining pipe 2 pushes the bottom tray 4, the bottom tray 4 drives the screen leakage pipe 3 to move downwards, and the pipe pressing component can enter the preset depth of the hole. The inner diameter of the liner tube 2 is slightly larger than the outer diameter of the screen leakage tube 3, the length is equal to the drilling depth, the screen leakage tube 3 is provided with small holes like a screen and distributed on the cylindrical surface of the tube, water can pass through, but large sand grains can not pass through, the bottom tray 4 is a disc part with a boss, the boss is arranged at the end part of the screen leakage tube 3, and interference fit is formed between the boss and the inner hole of the screen leakage tube 3, so that the screen leakage tube 3 can bear larger thrust without falling out.
The end cover 12 is a disc-like part with a convex edge, and two sinking grooves are arranged on the outer cylindrical surface of the end cover 12 and are used for placing O-shaped sealing rings 29 so as to ensure that the contact surface of the end cover 12 and the inner bile duct 14 is sealed after the end cover 12 is arranged in the inner bile duct 14, namely, no air leakage and no water leakage are caused; three through holes are arranged on the disk surface of the end cover 12, wherein two through holes are used for installing the pressure sensor 11 and the balance water pipe 13, a sealing gasket 18 is arranged at the installation position to ensure that no air leakage and no water leakage are caused, the other through hole is used for installing the push rod 22, a sinking groove is arranged at the port of the central hole and used for placing the lip-shaped sealing ring 21 to ensure that the push rod 22 passes through the central hole of the end cover 12, namely, no air leakage and no water leakage are caused.
The balance water pipe 13 is a vertically installed straight pipe, the upper end of the balance water pipe 13 is installed on the flange 16, the lower end of the balance water pipe is installed on the end cover 12 and is fixed through two retaining nuts 19, a change-over switch 20 is installed at the upper port of the balance water pipe 13, water flow flowing through the balance water pipe 13 can be controlled according to requirements, the balance water pipe 13 and the change-over switch 20 jointly form an automatic balance system for adjusting up and down water pressure, and two functions are provided in the balance system: the pressure release is firstly over-pressure release, when the detector 1 is inflated, the rubber air bag 15 generates certain pressure to the water body at the lower part of the detector 1 while the abdominal distention is carried out, and excessive pressure can be released upwards through the balance water pipe 13, and the water level is regulated, and if the water level is not high enough or does not return to the original water level before measurement, the water level can be regulated through the change-over switch 20.
The inner bile duct 14 is a stainless steel thin-wall circular tube, is a main framework of the detector, plays a role of supporting the upper and lower parts, is provided with a flange 16 at the upper end and an end cover 12 at the lower end, is wrapped with a rubber air bag 15 at the outer part, and is provided with a plurality of circular through holes on the cylindrical surface, wherein the through holes are used as necessary channels for gas entering from the air inlet pipe to flow to the rubber air bag 15.
As shown in fig. 4, which is a sectional view of a flange 16, the flange 16 is similar to the end cover 12 in shape and size, two sinking grooves for placing an O-shaped sealing ring 29 are arranged on the outer cylindrical surface of the flange 16, a sinking pit for accommodating a lip-shaped sealing ring 21 is arranged at the upper end opening of the central hole, and a through hole for accommodating a balance water pipe 13 is arranged on the disk surface; except that two other through holes are provided in the disk surface of the flange 16, one of which is for passing through the transmission line 22, a sealing plug 27 is provided in the hole, and the other is for mounting the air inlet pipe 24, and the air inlet pipe 24 is fixed on the flange 16 by a sealing nut 25 and a gasket 26, and the contact surface is ensured to be airtight and watertight.
The recorder 23 is an electronic component with storage and reading functions, and is connected with the pressure sensor 11 through a transmission line 28, the pressure sensor 11 transmits the sensed pressure to the recorder 23 in real time, the recorder 23 processes the transmitted information according to a preset algorithm rule, and the processed information data is recorded and stored in a memory card of the recorder 23 for later retrieval and copying.
The push rod 22 is a hollow stainless steel tube with two closed ends, is installed in the central holes of the end cover 12 and the flange 16, and the outer cylindrical surface is directly contacted with a pair of lip-shaped sealing rings 21 and can move up and down under the action of external force. In use, the extension bar 9 can be connected to the upper end of the push rod 22 according to actual needs.
The measuring method of the measuring device for the permeability coefficient of the viscous soil body comprises the following steps:
1) Drilling and pressing a pipe: firstly, assembling a liner tube 2, a screen leakage tube 3 and a bottom tray 4 into a pipe pressing assembly, drilling holes in soil to be measured, pressing the pipe pressing assembly into the drilled holes, carrying out back lifting on the liner tube 2 to a preset depth, fixing the position of the liner tube 2, backfilling coarse sand around the screen leakage tube 3 of the original drilling hole, and backfilling cement paste around the liner tube 2;
2) The detector is in place: placing a detector 1 communicated with an inflation system into a pre-buried liner tube 2, placing the pre-buried liner tube 2 on a sieve leakage tube 3, starting a compressor 6, inflating the detector 1, gradually opening a rubber air bag 15, blocking a gap between the detector 1 and the liner tube 2, enabling a part below the detector 1 to form a closed cavity until the reading of a pressure gauge 8 reaches a preset value, and stopping the compressor 6;
3) Water level recovery: after the detector 1 is inflated, the water level to be affected is restored within 3-5 minutes, so that the water pressures of the upper end surface and the lower end surface of the detector 1 are balanced, and then the lifting rope 10 is pulled, so that the change-over switch 20 is in a closed state;
4) Pressing a push rod: standing for 3-5 minutes, pushing the push rod 22 after the water pressure in the sieve leakage pipe 3 and the osmotic layer are balanced, and downwards extruding the water in the sieve leakage pipe 3 by the push rod 22, wherein the pressed water permeates into soil through the sieve leakage pipe 3;
5) And (3) data processing: the pressure sensor 11 transmits the measured water pressure value to the recorder 23 in real time, the recorder 23 stores the pressure value, and the permeability coefficient of the measured soil mass is calculated.
The working principle of the device for measuring the permeability coefficient of the viscous soil mass is as follows: placing the measuring device into the drilled hole, backfilling coarse sand grains around the measuring device, and plugging by cement paste to ensure that the periphery of the measuring device is not leaked; after the detector is placed at a proper position, the rubber air bag is inflated into the detector to block the liner tube, so that an isolated test cavity is formed at the lower part of the detector. By downward movement of the push rod, hyperstatic pressure is generated in the closed test cavity, water gradually permeates and dissipates to peripheral soil under the action of the hyperstatic pressure, and the permeation and dissipation speed depends on the water permeability of the soil. As the water is permeated and dissipated to the periphery, the hyperstatic pressure is gradually reduced, and the pressure sensor records the change process of the hyperstatic pressure, so that a curve of the hyperstatic pressure of the closed test cavity, which changes along with time, is obtained, and the curve can be used for calculating the permeability coefficient of soil.
Claims (2)
1. The measuring device comprises a detector (1), a liner tube (2), a sieve leakage tube (3), a bottom tray (4), an air valve (5), a compressor (6), a directional valve (7), a pressure gauge (8), an extension bar (9) and a lifting rope (10); the sieve leakage pipe (3) is sleeved in the liner pipe (2), the bottom tray (4) is arranged at the lower end part of the sieve leakage pipe (3), the detector (1) is placed in the liner pipe (2) and positioned at the upper end part of the sieve leakage pipe (3), the pressure gauge (8), the air valve (5), the directional valve (7) and the compressor (6) are sequentially connected onto the detector (1) through the air duct, the extension rod (9) is arranged on a push rod of the detector (1), and the lifting rope (10) is tied onto a change-over switch of the detector (1);
the detector (1) comprises a pressure sensor (11), an end cover (12), a balance water pipe (13), an inner liner pipe (14), a rubber air bag (15), a flange (16), a tightening ring (17), a sealing gasket (18), a retaining nut (19), a change-over switch (20), a lip-shaped sealing ring (21), a push rod (22), a recorder (23), an air inlet pipe (24), a sealing nut (25), a gasket (26), a sealing plug (27), a transmission line (28) and an O-shaped sealing ring (29);
the inner liner tube (14) is arranged in the rubber air bag (15), two clamping rings (17) are arranged at two ends of the inner liner tube (14) to clamp the rubber air bag (15) on the inner liner tube (14), a flange (16) and an end cover (12) are respectively arranged at the upper port and the lower port of the inner liner tube (14), a pressure sensor (11) is arranged on the end cover (12), the pressure sensor is connected with a recorder (23) through a transmission line (28), a sealing plug (27) is arranged in a hole of the transmission line (28) passing through the flange (16), a pair of O-shaped sealing rings (29) are respectively arranged on the outer cylindrical surfaces of the flange (16) and the end cover (12), a lip-shaped sealing ring (21) is respectively arranged in the central holes of the flange (16) and the end cover (12), two ends of the balance water tube (13) are respectively fixed on the flange (16) and the end cover (12) through two stop nuts (19), sealing gaskets (18) are respectively arranged at the contact surfaces of each other, a change-over switch (20) is arranged at the upper port of the balance water tube (13), a push rod (22) passes through the flange (16) and the central hole (24) of the air inlet tube (12), a pair of O-shaped sealing rings (24) are respectively arranged in the central holes of the flange (16) and the end cover (12) through the sealing rings (24), the other port extends into the inner bile duct (14);
the measuring method of the measuring device is characterized by comprising the following steps of:
1) Drilling and pressing a pipe: firstly, assembling a liner tube (2), a screen leakage tube (3) and a bottom tray (4) into a pressure tube assembly, drilling holes in soil to be measured, applying pressure to the liner tube (2) when the assembled pressure tube assembly is put into the drilled holes, pushing the bottom tray (4) by the liner tube (2), driving the screen leakage tube (3) to downwards move by the bottom tray (4), lifting the liner tube (2) back to a preset depth, fixing the position of the liner tube (2) without exceeding the length of the screen leakage tube (3), backfilling coarse sand grains around the screen leakage tube (3) of the original drilling holes, and backfilling cement paste around the liner tube (2);
2) The detector is in place: placing a detector (1) communicated with an inflation system into a pre-buried liner tube (2), placing the detector on a sieve leakage tube (3), starting a compressor (6), inflating the detector (1), gradually opening a rubber air bag (15), blocking a gap between the detector (1) and the liner tube (2), enabling a part below the detector (1) to form a closed cavity until the reading of a pressure gauge (8) reaches a preset value, and stopping the compressor (6);
3) Water level recovery: after the detector (1) is inflated, waiting for 3-5 minutes, recovering the water level to be affected, balancing the water pressure of the upper end face and the lower end face of the detector (1), and then pulling the lifting rope (10) to enable the change-over switch (20) to be in a closed state;
4) Pressing a push rod: standing for 3-5 minutes, pushing the push rod (22) after the water pressure in the sieve leakage pipe (3) and the permeable layer are balanced, and downwards extruding the water in the sieve leakage pipe (3) by the push rod (22), wherein the pressed water permeates into soil through the sieve leakage pipe (3);
5) And (3) data processing: the pressure sensor (11) transmits the measured water pressure value to the recorder (23) in real time, the recorder (23) stores the pressure value, and the permeability coefficient of the measured soil body is calculated.
2. The measuring method of the measuring device for the permeability coefficient of the viscous soil body according to claim 1, wherein the bottom tray (4) and the inner hole of the sieve leakage pipe (3) form interference fit, and the sieve leakage pipe (3) is provided with small holes distributed on the cylindrical surface of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810340149.2A CN108593517B (en) | 2018-04-16 | 2018-04-16 | Device and method for measuring permeability coefficient of viscous soil body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810340149.2A CN108593517B (en) | 2018-04-16 | 2018-04-16 | Device and method for measuring permeability coefficient of viscous soil body |
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| Publication Number | Publication Date |
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| CN108593517A CN108593517A (en) | 2018-09-28 |
| CN108593517B true CN108593517B (en) | 2023-09-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3158023A (en) * | 1960-06-01 | 1964-11-24 | Soletanche Soc | Method and means for measuring permeability in situ |
| JP2001132375A (en) * | 1999-10-29 | 2001-05-15 | Nishi Nippon Chishitsu Chiyousashiyo:Kk | Double tube type on-site permeability test method and device |
| CN201716256U (en) * | 2010-07-14 | 2011-01-19 | 中原工学院 | Soil mass permeability testing device |
| CN102749277A (en) * | 2012-06-30 | 2012-10-24 | 东南大学 | Device for testing performance of cohesive soil sample and testing method thereof |
| CN208060345U (en) * | 2018-04-16 | 2018-11-06 | 浙江大学 | A kind of measuring device of stickiness soil body osmotic coefficient |
-
2018
- 2018-04-16 CN CN201810340149.2A patent/CN108593517B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3158023A (en) * | 1960-06-01 | 1964-11-24 | Soletanche Soc | Method and means for measuring permeability in situ |
| JP2001132375A (en) * | 1999-10-29 | 2001-05-15 | Nishi Nippon Chishitsu Chiyousashiyo:Kk | Double tube type on-site permeability test method and device |
| CN201716256U (en) * | 2010-07-14 | 2011-01-19 | 中原工学院 | Soil mass permeability testing device |
| CN102749277A (en) * | 2012-06-30 | 2012-10-24 | 东南大学 | Device for testing performance of cohesive soil sample and testing method thereof |
| CN208060345U (en) * | 2018-04-16 | 2018-11-06 | 浙江大学 | A kind of measuring device of stickiness soil body osmotic coefficient |
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| CN108593517A (en) | 2018-09-28 |
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