CN109342150B - Test device and method for gas-containing soil sample consolidation test and permeation test - Google Patents
Test device and method for gas-containing soil sample consolidation test and permeation test Download PDFInfo
- Publication number
- CN109342150B CN109342150B CN201811566961.3A CN201811566961A CN109342150B CN 109342150 B CN109342150 B CN 109342150B CN 201811566961 A CN201811566961 A CN 201811566961A CN 109342150 B CN109342150 B CN 109342150B
- Authority
- CN
- China
- Prior art keywords
- water
- test
- gas
- soil sample
- top cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 121
- 239000002689 soil Substances 0.000 title claims abstract description 114
- 238000007596 consolidation process Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 228
- 229920001971 elastomer Polymers 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000010998 test method Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 53
- 230000035515 penetration Effects 0.000 claims description 25
- 239000011148 porous material Substances 0.000 claims description 15
- 230000035699 permeability Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 229940099259 vaseline Drugs 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- 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
-
- 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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a test device and a test method for a gas-containing soil sample consolidation test and a permeation test, wherein the test device comprises a base, the top of the base is connected with a middle ring, the top of the middle ring is provided with an upper ring, the lower part of the middle ring is provided with a rubber water bag, the outside of the middle ring is provided with a water injection pipe, the water injection pipe is communicated with a three-way valve A, the three-way valve A is communicated with a water inlet pipe and a water outlet pipe, and the water outlet pipe is provided with a pressure sensor B; the middle part of the middle ring is provided with a water flow channel B and a water flow channel C, the water flow channel B is hermetically connected with a pressure sensor A, the water flow channel C is communicated with a three-way valve B through a pipeline A, and the three-way valve B is respectively communicated with a flow measuring pipe and a water supply device through pipelines; the upper ring is internally provided with a piston, the top of the piston is provided with a top cap, the lower part of the top cap is provided with a drainage pipeline, and the drainage pipeline is communicated with a liquid measuring pipe through a pipeline B; an exhaust pipe is arranged at the top of the top cap. The invention is suitable for the gas-containing soil infiltration and consolidation test, has the advantages of novel structure, lower cost and the like, and improves the measurement precision of the test.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering geotechnical tests, in particular to a test device and a test method for a gas-containing soil sample consolidation test and a permeation test.
Background
The gas-containing soil is generally characterized by the existence of a closed gas phase, and the gas phase is in the form of free, dissolved or gas-water compound and the like and is widely distributed in the lake bottom, estuary, valley bottom, delta, seabed and shallow stratum with relatively rich oil-gas resources. The gas-containing soil which is rich in shallow gas and has the gas phase in the free bubble phase state generally has the characteristics of high water content, gas phase dissolution saturation, higher pressure than atmospheric pressure, small permeability coefficient, metastable equilibrium state and the like. In the geotechnical engineering field, there is little knowledge of the gas-bearing soil with special properties, engineering properties differing from general saturated and unsaturated soil, one of the main difficulties being the lack of dedicated test equipment. The conventional consolidation penetration test device is only suitable for measuring the consolidation deformation parameter and the penetration parameter of the conventional saturated soil, and cannot be suitable for the consolidation penetration test of the gas-containing soil because the displacement in the consolidation process can only be measured, but the displacement in the consolidation process cannot be measured. The Chinese patent number ZL201820038132.7 discloses a consolidation test device for gas-containing soil, which comprises a bracket, a pressure cylinder, a piston, a top cap, a porous plate, a guide rod, a displacement sensor, a total stress sensor, a water vapor measuring device, a pore water pressure measuring device for the upper surface and the lower surface of a soil sample to be tested, a water inlet, a guide pipe and a pressure cylinder, wherein the bracket is fixed with the pressure cylinder; the piston is arranged in the pressure cylinder; the guide rod is arranged at the bottom of the piston; the displacement sensor is arranged at the bottom of the bracket and connected with the guide rod; the top cap and the porous plate are arranged on the consolidation chamber from top to bottom; the total stress sensor is arranged on the upper surface of the piston; the water-gas measuring device is arranged on the top cap; a water inlet is arranged on the pressure cylinder; a guide pipe is arranged on the piston; the water inlet is communicated with the pressure chamber and externally connected with external pressurizing equipment; pore water pressure measuring devices on the upper surface and the lower surface of the soil sample to be measured are respectively communicated with the upper surface and the lower surface of the soil sample to be measured. The device can be suitable for gas-containing soil, can perform gas-water separation in the gas sealing and consolidation processes and can independently measure; however, the device cannot realize the gas-containing soil penetration test, is complex in operation, and is unfavorable for accurate and rapid measurement of the gas-containing soil sample consolidation test and the penetration test.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the test device and the method for the gas-containing soil sample consolidation test and the permeation test, which are not only suitable for the gas-containing soil to simultaneously cross the permeation test and the consolidation test, but also can overcome the influence of the friction resistance error of the piston side wall in the consolidation process, and have the advantages of novel structure, lower test cost and the like, and simultaneously improve the measurement precision of the test.
The aim of the invention is achieved by the following technical scheme:
the test device for the gas-containing soil sample consolidation test and the permeation test comprises a base, a middle ring, an upper ring, a piston, a top cap, a liquid measuring pipe, a flow measuring pipe and a water supply device, wherein the top of the base is connected with the middle ring in a sealing manner, the upper ring is arranged on the top of the middle ring in a sealing manner, an inner cavity of the middle ring comprises an upper soil sample cavity and a lower water bag placing cavity, a rubber water bag is placed in the lower water bag placing cavity, the rubber water bag is provided with a pipe head communicated with the inner cavity of the water bag, a water flow channel A communicated with the pipe head of the rubber water bag is arranged at the lower part of the middle ring, a water injection pipe communicated with the water flow channel A in a sealing manner is arranged at the outer part of the middle ring, a three-way valve A is communicated with a water inlet pipe and a water outlet pipe, and a pressure sensor B is arranged on the water outlet pipe; the middle part of the middle ring is provided with a water flow channel B and a water flow channel C which are higher than the rubber water bag, the water flow channel B is hermetically connected with a pressure sensor A, the water flow channel C is communicated with a three-way valve B through a pipeline A, and the three-way valve B is also respectively communicated with a flow measuring pipe and a water supply device through pipelines; the water-stopping clamp is characterized in that a water-permeable stone is placed at the top of a rubber water bag in an inner cavity of the middle ring, a piston is installed in the inner cavity of the upper ring, a plurality of vertical channels are penetrated through the piston, a top cap is installed at the top of the piston in a sealing manner, a top cap cavity communicated with the vertical channels is formed in the top cap, a drainage pipeline communicated with the side part of the top cap cavity is formed in the side wall of the lower part of the top cap, the drainage pipeline is communicated with a liquid measuring pipe through a pipeline B, and a water-stopping clamp is installed on the pipeline B; the top cap top is provided with an exhaust pipe communicated with the top of the top cap cavity, the top cap top is provided with an exhaust pipe communicated with the exhaust pipe, and the exhaust pipe is provided with an exhaust valve.
In order to better realize the invention, the invention also comprises a computer data processing system, and the pressure sensor A and the pressure sensor B are respectively electrically connected with the computer data processing system.
Preferably, the bottom of the piston is provided with a drainage pressure groove communicated with all vertical channels, a porous plate positioned below the drainage pressure groove is arranged at the bottom of the piston, and filter paper is also arranged between the porous plate and the bottom of the piston.
Preferably, a drain pipe communicated with the exhaust pipeline is arranged on the outer side wall of the top cap, and a drain valve is arranged on the drain pipe.
Preferably, the top plane of the top cap is provided with a bearing head.
Preferably, the height of the top plane of the permeable stone is higher than the height of the water flow channel B, and the height of the top plane of the permeable stone is higher than the height of the water flow channel C.
Preferably, three bolts which are 120 degrees each other are connected between the upper ring and the base to tightly press and fix the middle ring, a circular ring type groove A is arranged in the center of the top of the base, the bottom of the middle ring is matched and inserted into the circular ring type groove A of the base, and an O-shaped sealing ring B is matched and installed between the bottom of the middle ring and the top of the base; the bottom of the upper ring is provided with a circular ring type groove B, the top of the middle ring is matched and inserted into the circular ring type groove B of the upper ring, and an O-shaped sealing ring C is matched and installed between the top of the middle ring and the bottom of the upper ring.
Preferably, the bottom of the top cap is provided with a circular groove C, the top of the piston is matched and inserted into the circular groove C of the top cap, an O-shaped sealing ring A is also arranged between the top of the piston and the bottom of the top cap, and a plurality of O-shaped sealing rings A are matched and arranged on the outer side wall of the lower part of the piston; the top surface of the top cap cavity of the top cap forms an included angle of 15 degrees with the horizontal plane.
The O-shaped sealing ring A, the O-shaped sealing ring B and the O-shaped sealing ring C are all technical contents well known by the public in the technical field, are rubber rings with circular cross sections, are called O-shaped sealing rings because of the O-shaped overall appearance, are mainly used for preventing leakage of liquid and gas media between mechanical parts, and can be used as dynamic sealing elements for axial reciprocating motion and low-speed rotation motion; the o-ring may also be referred to as a circular ring, which acts as a seal between the two components.
The test method for the consolidation test and the penetration test of the gas-containing soil sample comprises a test device, and comprises the following steps:
A. and (3) installing a test device: placing the base on a level-adjusting consolidation apparatus, adjusting the base to a horizontal position, mounting the middle ring on the top of the base coated with vaseline, and before mounting the middle ring, sealing by an O-ring B between the top of the base and the bottom of the middle ring; placing a rubber water bag in a lower water bag placing cavity in the middle ring, enabling a pipe head of the rubber water bag to be communicated with a water flow channel A in a sealing way, installing a pressure sensor B on a water outlet pipe at a position of a three-way valve A, enabling the pressure sensor B to be connected with a computer data processing system, then opening a water inlet valve of the three-way valve A, pouring a base together with the middle ring side, enabling the water flow channel A to face upwards vertically, slowly injecting deaerated water into the rubber water bag through a water inlet at the position of the three-way valve A by adopting a medical injector, discharging air in the rubber water bag, and closing the water inlet valve of the three-way valve A when the rubber water bag is fully filled with water; resetting the base and the middle ring, and keeping the water outlet pipe at the position of the three-way valve A in a communication state with the pressure sensor B; the pipeline A is communicated with the water flow channel C of the middle ring in a sealing way, the three-way valve B is arranged on the pipeline A, and the water supply device and the flow measuring pipe are respectively communicated with the other two interfaces of the three-way valve B through the pipeline; the water flow channel B of the middle ring is hermetically connected with the pressure sensor A, and the pressure sensor A is connected with a computer data processing system; sealing the top of the middle ring by sealing the upper ring, sealing the top of the middle ring by an O-ring C, connecting and fixing the upper ring and the base by three bolts forming 120 degrees with each other, and tightening all the bolts to compress the middle ring; then sequentially placing wet water permeable stone and soaked filter paper on the top of a rubber water bag in a middle ring, filling the prepared gas-containing soil sample into an upper soil sample cavity on the upper part of the rubber water bag, standing for at least 36 hours, sucking away water separated out from the surface of the gas-containing soil sample after the self-weight consolidation sedimentation of the gas-containing soil sample is completed, placing a porous plate on the upper surface of the gas-containing soil sample, and then placing a layer of soaked filter paper; a piston is installed in the upper ring in a lifting and sliding manner, a plurality of O-shaped sealing rings A are arranged on the contact surface between the outer wall of the piston and the inner wall of the upper ring in a filling manner to seal, the lower surface of the piston is contacted with a porous plate, and meanwhile, a proper amount of vaseline is smeared on the outer side wall of the piston; covering a top cap, communicating a drainage pipeline at the side part of the top cap with a liquid measuring pipe through a pipeline B, opening an exhaust valve of the exhaust pipe, loosening a water stopping clamp on the pipeline B, injecting deaerated water into the liquid measuring pipe until the water overflows from the exhaust pipe of the top cap, stopping water injection, and closing the exhaust valve of the exhaust pipe; placing the test device with the gas-containing soil sample at a preset position of a pressurizing table, wherein the preset position of the pressurizing table is provided with a pressurizing device and a dial indicator, the pressurizing device is provided with a pressurizing rod, the bottom end of the pressurizing rod of the pressurizing device is contacted with a bearing head at the top end of a top cap, and the dial indicator is adjusted so that the dial indicator is just placed at the central position of the top end of the pressurizing rod;
B. before formal loading, pre-pressing load is firstly applied through a pressing device, so that the pressure applied to the gas-containing soil sample, displayed by a pressure sensor B, is 1kPa, after the pressure is stabilized, a dial indicator is reset to zero, the height H of the gas-containing soil sample at the moment is measured, and the pore ratio e is calculated 0 I.e. the initial void ratio before the test, and the reading of the measuring tube at this time was recorded as V 1 ；
C. Applying external load through a pressurizing device, enabling the pressure applied to the gas-containing soil sample displayed by a pressure sensor B to be 2kPa, recording readings of a dial indicator at all time nodes, observing dissipation conditions of pore pressure in the gas-containing soil sample through the pressure sensor A, and keeping the consolidation pressure of 2kPa unchanged until the pore pressure in the gas-containing soil sample is dissipated to be zero;
D. when the pore pressure dissipates to zero, the deformation h of the soil sample is obtained according to the reading of the dial indicator i1 The height of the gas-containing soil sample after consolidation under the current level load is H i1 ＝H-h i1 The current level load is the consolidation pressure of 2kPa of the step C, byObtaining the porosity of the gas-containing soil sample at the moment, and simultaneously reading the reading V of the measuring tube at the moment 2 There is V w +V g ＝V 2 -V 1 Wherein V is w Volume of discharged water of the gas-containing soil sample loaded in the stage V g The volume of the gas is discharged for the gas-containing soil sample loaded in the present stage; opening the exhaust valve of the exhaust pipe at the upper part of the top cap, completely removing the gas accumulated at the top part of the top cap cavity of the top cap, closing the exhaust valve of the exhaust pipe, recording the volume reading in the measuring tube at the moment, wherein the change amount before and after the exhaust is DeltaV, namely DeltaV=V g The volume quantity of the gas-containing soil sample exhaust gas in the current stage load consolidation test is V g The current level load consolidation test is a test under the consolidation pressure of 2kPa in the step C, and the corresponding volume amount of the gas-containing soil sample discharged water in the current level load consolidation test is V w ＝V 2 -V 1 -△V；
E. Penetration test: after the consolidation test is finished, a permeation test of the gas-containing soil sample can be carried out, a water stop clamp is used for pinching off a drainage pipeline to drain water outwards, a drainage valve on a drainage pipe at the top of the top cap is opened, and water entering a top cap cavity in the top cap is allowed to drain freely; regulating the three-way valve B, injecting deaerated water into the flow measuring pipe through the water supply device to enable the water head height in the flow measuring pipe to be 1m, and stopping water supply after the water head in the pipe is stable; the three-way valve B is regulated to enable the water in the measuring tube to slowly permeate into and pass through the gas-containing soil sample, and when the water is discharged from the drain pipe at the top of the top cap, the initial water head height h in the measuring tube is measured and recorded 1 And corresponding time t 1 Recording the water head height h in the flow measuring tube again after a period of time 2 And corresponding time t 2 Recording the water head height h and the corresponding time t in the flow measuring tube at the moment until the water head height in the final flow measuring tube is unchanged; repeating the operation of the permeability test for M times, changing the water head height in the measuring pipe during each permeability test, and finally calculating the permeability coefficient of the gas-containing soil sample according to the saturated soil water head-changing permeability test method in the conventional geotechnical test;
F. and (3) continuously applying external load through the pressurizing device, and repeating the operations from the step C to the step E, so that the consolidation test and penetration test result data of the gas-containing soil sample under the consolidation pressure of each level can be obtained sequentially.
Compared with the prior art, the invention has the following advantages:
(1) The invention can not only carry out consolidation test of the soil containing gas, but also carry out penetration test of the soil containing gas. Meanwhile, the invention also overcomes the influence of friction resistance on the side wall of the piston of the traditional device, can more accurately measure the consolidation pressure acting on the gas-containing soil sample, and has the advantages of novel structure, convenient operation and the like.
(2) The invention is not only suitable for the gas-containing soil to simultaneously and alternately perform the permeation test and the consolidation test, but also can overcome the influence of friction resistance errors on the side wall of the piston in the consolidation process, has the advantages of novel structure, lower test cost and the like, and simultaneously improves the measurement precision of the test.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic diagram of a drain pressing groove structure at the bottom of the piston of the present invention.
Wherein, the names corresponding to the reference numerals in the drawings are:
1 base, 2 rubber water bag, 3 three-way valve A,4 pressure sensor A,5 drain valve, 6 upper ring, 7O-ring A,8 top cap, 81 top cap cavity, 9 bearing head, 10 middle ring, 11 gas soil sample, 12 porous plate, 13 measuring tube, 14 measuring tube, 15 blast pipe, 16 water supply device, 17 bolt, 18 piston, 19 pressure sensor B,20 pipeline A,21 water flow channel B,22 water flow channel C,23 three-way valve B,24 drain pipe, 25 water permeable stone, 26O-ring B,27 vertical channel, 28 water pressure groove, 29 water stop clip, 30 water flow channel A,31 pipeline B, 32O-ring C,33 computer data processing system.
Detailed Description
The invention is further illustrated by the following examples:
examples
As shown in fig. 1-2, a test device for a gas-containing soil sample consolidation test and a permeation test comprises a base 1, a middle ring 10, an upper ring 6, a piston 18, a top cap 8, a liquid measuring tube 14, a flow measuring tube 13 and a water supply device 16, wherein the top of the base 1 is connected with the middle ring 10 in a sealing manner, the upper ring 6 is arranged at the top of the middle ring 10 in a sealing manner, an inner cavity of the middle ring 10 comprises an upper soil sample cavity and a lower water bag placing cavity, a rubber water bag 2 is placed in the lower water bag placing cavity, the rubber water bag 2 is provided with a tube head communicated with the water bag cavity, the lower part of the middle ring 10 is provided with a water flow channel A30 communicated with the tube head of the rubber water bag 2, a water injection tube communicated with the water flow channel A30 in a sealing manner is arranged outside the middle ring 10, a three-way valve A3 is communicated with a water inlet tube and a water outlet tube, and a pressure sensor B19 is arranged on the water outlet tube. The middle part of the middle ring 10 is provided with a water flow channel B21 and a water flow channel C22 which are higher than the rubber water bag 2, the water flow channel B21 is hermetically connected with a pressure sensor A4, the water flow channel C22 is communicated with a three-way valve B23 through a pipeline A20, and the three-way valve B23 is also respectively communicated with the flow measuring pipe 13 and the water supply device 16 through pipelines. The water permeable stone 25 is placed at the top of the rubber water bag 2 in the inner cavity of the middle ring 10, the piston 18 is installed in the inner cavity of the upper ring 6, a plurality of vertical channels 27 penetrate through the piston 18, the top cap 8 is installed at the top of the piston 18 in a sealing mode, a top cap cavity 81 communicated with the vertical channels 27 is formed in the top cap 8, a drainage pipeline 24 communicated with the side portion of the top cap cavity 81 is arranged on the side wall of the lower portion of the top cap 8, the drainage pipeline 24 is communicated with the liquid measuring pipe 14 through a pipeline B31, and a water stop clamp 29 is installed on the pipeline B31. The top of the top cap 8 is provided with an exhaust pipeline communicated with the top of the top cap cavity 81, the top of the top cap 8 is provided with an exhaust pipe 15 communicated with the exhaust pipeline, and the exhaust pipe 15 is provided with an exhaust valve.
The invention also comprises a computer data processing system 33, and the pressure sensor A4 and the pressure sensor B19 are respectively and electrically connected with the computer data processing system 33.
As shown in fig. 2, a drainage pressure groove 28 communicated with all vertical channels 27 is arranged at the bottom of the piston 18, a porous plate 12 positioned below the drainage pressure groove 28 is arranged at the bottom of the piston 18, and filter paper is also arranged between the porous plate 12 and the bottom of the piston 18.
As shown in fig. 1, a drain pipe communicated with an exhaust pipeline is arranged on the outer side wall of the top cap 8, and a drain valve 5 is arranged on the drain pipe. The top plane of the top cap 8 is provided with a bearing head 9.
The preferred water permeable stones 25 of the present invention have a top plane height higher than the height of the water flow channel B21, while the water permeable stones 25 have a top plane height higher than the height of the water flow channel C22.
Three bolts 17 which are 120 degrees each other are connected between the upper ring 6 and the base 1 to tightly press and fix the middle ring 10, a circular groove A is arranged in the center of the top of the base 1, the bottom of the middle ring 10 is matched and inserted into the circular groove A of the base 1, and an O-shaped sealing ring B26 is matched and installed between the bottom of the middle ring 10 and the top of the base 1. The bottom of the upper ring 6 is provided with a circular groove B, the top of the middle ring 10 is matched and inserted into the circular groove B of the upper ring 6, and an O-shaped sealing ring C32 is matched and installed between the top of the middle ring 10 and the bottom of the upper ring 6.
The bottom of the top cap 8 is provided with a circular groove C, the top of the piston 18 is matched and inserted into the circular groove C of the top cap 8, an O-shaped sealing ring A7 is further arranged between the top of the piston 18 and the bottom of the top cap 8, and a plurality of O-shaped sealing rings A7 are matched and arranged on the outer side wall of the lower part of the piston 18 (when the water-proof device is used, a gap less than or equal to 0.5mm is arranged between the piston 18 and the inner wall of the upper ring 6, and sealing water-proof is carried out between the piston 18 and the inner wall of the upper ring 6 through the O-shaped sealing rings A7). The top surface of the top cap cavity 81 of the top cap 8 is at an angle of 15 ° to the horizontal.
The test method for the consolidation test and the penetration test of the gas-containing soil sample comprises a test device, and comprises the following steps:
A. and (3) installing a test device: the base 1 was placed on a leveling consolidation apparatus and the base 1 was adjusted to a horizontal position, the middle ring 10 was mounted on top of the base 1 to which vaseline had been applied, and an o-ring B26 was placed between the top of the base 1 and the bottom of the middle ring 10 before the middle ring 10 was mounted. The rubber water bag 2 is placed in a lower water bag placing cavity in the middle ring 10, so that the pipe head of the rubber water bag 2 is communicated with the water flow channel A30 in a sealing way, a pressure sensor B19 is installed on a water outlet pipe at the position of the three-way valve A3, the pressure sensor B19 is connected with the computer data processing system 33, and then a water inlet valve of the three-way valve A3 is opened. The base 1 and the middle ring 10 are laterally reversed, the water flow channel A30 is vertically upwards, degassing water is slowly injected into the rubber water bag 2 through a water inlet at the position of the three-way valve A3 by a medical injector, air in the rubber water bag 2 is discharged, and when the rubber water bag 2 is completely filled with water, a water inlet valve of the three-way valve A3 is closed; and resetting the base 1 and the middle ring 10, and keeping the water outlet pipe at the position of the three-way valve A3 and the pressure sensor B19 in a communicating state. The pipeline A20 is communicated with the water flow channel C22 of the middle ring 10 in a sealing way, the three-way valve B23 is arranged on the pipeline A20, and the water supply device 16 and the measuring tube 13 are respectively communicated with the other two interfaces of the three-way valve B23 through the pipelines. The pressure sensor A4 is connected at the water flow channel B21 of the middle ring 10 in a sealing way, and the pressure sensor A4 is connected with the computer data processing system 33. The upper ring 6 is tightly covered on the top of the middle ring 10, an O-ring C32 is arranged between the upper ring 6 and the middle ring 10 in a sealing way, the upper ring 6 and the base 1 are connected and fixed by three bolts 17 which are 120 degrees each other, and all the bolts 17 are screwed to tightly press the middle ring 10. Then, sequentially placing a wet water permeable stone 25 saturated with water and soaked filter paper on the top of the rubber water bag 2 in the middle ring 10, filling the prepared gas-containing soil sample 11 into an upper soil sample cavity at the upper part of the rubber water bag 2, standing for at least 36 hours, sucking out water separated out from the surface of the gas-containing soil sample 11 after the self-weight consolidation sedimentation of the gas-containing soil sample 11 is completed, placing a porous plate 12 on the gas-containing soil sample 11, and then placing a layer of soaked filter paper. The piston 18 is installed in the upper ring 6 in a lifting and sliding manner, a plurality of O-shaped sealing rings A7 are arranged on the contact surface between the outer wall of the piston 18 and the inner wall of the upper ring 6 in a cushioning manner to seal, the lower surface of the piston 18 is contacted with the porous plate 12, and meanwhile, a proper amount of vaseline is smeared on the outer side wall of the piston 18. The top cap 8 is covered, the drainage pipeline 24 at the side part of the top cap 8 is communicated with the liquid measuring pipe 14 through the pipeline B31, the exhaust valve of the exhaust pipe 15 is opened, the water stop clamp 29 on the pipeline B31 is loosened, deaerated water is injected into the liquid measuring pipe 14 until the water overflows from the exhaust pipe 15 of the top cap 8, then the water injection is stopped, and the exhaust valve of the exhaust pipe 15 is closed. The test device with the gas-containing soil sample 11 is placed at a preset position of a pressurizing table, the pressurizing table is provided with a pressurizing device and a dial indicator, the pressurizing device is provided with a pressurizing rod, the bottom end of the pressurizing rod of the pressurizing device is contacted with a bearing head 9 at the top end of a top cap 8, and the dial indicator is adjusted so that the dial indicator is just placed at the central position of the top end of the pressurizing rod.
B. Before formal loading, a pre-pressing load is firstly applied by a pressing device, so that the pressure applied to the gas-containing soil sample 11, displayed by a pressure sensor B19, is 1kPa, after the pressure is stabilized, a dial indicator is reset to zero, the height H of the gas-containing soil sample 11 at the moment is measured, and the pore ratio e is calculated 0 I.e. the initial void ratio before the test, and the reading of the measuring tube 14 at this time is recorded as V 1 。
C. And (3) applying external load through a pressurizing device, so that the pressure applied to the gas-containing soil sample 11, which is displayed by the pressure sensor B19, is 2kPa, recording the readings of the dial indicators at all time nodes, and simultaneously observing the dissipation condition of the pore pressure in the gas-containing soil sample 11 through the pressure sensor A4, and keeping the consolidation pressure of 2kPa unchanged until the pore pressure in the gas-containing soil sample 11 is dissipated to be zero.
D. When the pore pressure dissipates to zero, the deformation h of the gas-containing soil sample 11 is obtained according to the reading of the dial indicator i1 The height of the gas-containing soil sample after consolidation under the current level load is H i1 ＝H-h i1 The current level load is the consolidation pressure of 2kPa of the step C, byThe porosity of the now aerated soil sample 11 is obtained, while the reading V of the now measuring tube 14 is read 2 There is V w +V g ＝V 2 -V 1 Wherein V is w Volume of water discharged for the aerated soil sample 11 loaded in the present stage, V g The volume of the gas is discharged for the gas-containing soil sample 11 loaded at this stage. Opening the exhaust valve of the exhaust pipe 15 at the upper part of the top cap 8, closing the exhaust valve of the exhaust pipe 15 when the gas accumulated at the top of the top cap cavity 81 of the top cap 8 is completely removed, recording the volume reading in the liquid measuring pipe 14 at the moment, wherein the change amount before and after the exhaust is DeltaV, namely DeltaV=V g The volume amount of the discharged gas of the gas-containing soil sample 11 in the current stage of load consolidation test is V g The present stage of load consolidation test is a test under the consolidation pressure of 2kPa in the step C, and the corresponding volume amount of the discharged water of the gas-containing soil sample 11 in the present stage of load consolidation test is V w ＝V 2 -V 1 -△V。
E. Penetration test: after the consolidation test is finished, the permeation test of the gas-containing soil sample 11 can be carried out, the water-stopping clamp 29 is used for pinching off the water-draining pipeline 24 to drain water outwards, the water-draining valve 5 on the water-draining pipe at the top of the top cap 8 is opened, and water entering the top cap cavity 81 inside the top cap 8 is allowed to drain freely. The three-way valve B23 is regulated, and deaerated water is injected into the flow measuring pipe 13 through the water supply device 16, so that the measurement is performedThe water head height in the flow pipe 13 is 1m, and water supply is stopped after the water head in the pipe is stable. The three-way valve B23 is regulated to enable the water in the measuring tube 13 to slowly permeate into and pass through the gas-containing soil sample 11, and when the water is discharged from the water discharge pipe at the top of the top cap 8, the initial water head height h in the measuring tube 13 is measured 1 And corresponding time t 1 The head height h in the flow tube 13 is recorded again after a while 2 And corresponding time t 2 Until the final head height in the flow tube 13 is unchanged, the head height h in the flow tube 13 at that time and the corresponding time t are recorded. Repeating the operation of the penetration test for M times, changing the water head height in the flow measuring pipe 13 during each penetration test, and finally calculating the permeability coefficient of the gas-containing soil sample 11 according to the saturated soil water head-changing penetration test method in the conventional geotechnical test.
F. And continuing to apply external load through the pressurizing device, repeating the operations of the steps C to E, sequentially obtaining the consolidation test and the permeability test result data of the gas-containing soil sample 11 under the consolidation pressures of all levels (the consolidation pressures of all levels comprise 4kPa, 8kPa, 16kPa, 32kPa … and the like, namely, the external load is applied through the pressurizing device, so that the pressure applied to the gas-containing soil sample 11 is 4kPa, 8kPa, 16kPa, 32kPa … and the like, which are displayed by the pressure sensor B19), namely, obtaining the compression coefficient, the permeability coefficient and the pore ratio of the gas-containing soil sample 11 under the consolidation pressures of all levels, and further evaluating the consolidation and permeability characteristics of the gas-containing soil sample 11.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A test device for gas soil sample consolidation test and penetration test, its characterized in that: the device comprises a base (1), a middle ring (10), an upper ring (6), a piston (18), a top cap (8), a measuring tube (14), a measuring tube (13) and a water supply device (16), wherein the top of the base (1) is connected with the middle ring (10) in a sealing way, the upper ring (6) is arranged on the top of the middle ring (10) in a sealing way, an inner cavity of the middle ring (10) comprises an upper soil sample cavity and a lower water bag placing cavity, a rubber water bag (2) is arranged in the lower water bag placing cavity, the rubber water bag (2) is provided with a tube head communicated with the inner cavity of the water bag, a water flow channel A (30) communicated with the tube head of the rubber water bag (2) is arranged at the lower part of the middle ring (10), a three-way valve A (3) is arranged on the water injection tube in a sealing way, a water inlet pipe and a water outlet pipe are also communicated with a water inlet pipe and a pressure sensor B (19) is arranged on the water outlet pipe; a water flow channel B (21) and a water flow channel C (22) which are higher than the rubber water bag (2) are arranged in the middle of the middle ring (10), a pressure sensor A (4) is connected to the water flow channel B (21) in a sealing way, a three-way valve B (23) is communicated with the water flow channel C (22) through a pipeline A (20), and the three-way valve B (23) is also respectively communicated with a flow measuring pipe (13) and a water supply device (16) through pipelines; the water permeable stone (25) is placed at the top of the rubber water bag (2) in the inner cavity of the middle ring (10), the piston (18) is installed in the inner cavity of the upper ring (6), a plurality of vertical channels (27) are penetrated and formed in the piston (18), a top cap (8) is hermetically installed at the top of the piston (18), a top cap cavity (81) communicated with the vertical channels (27) is formed in the top cap (8), a drainage pipeline (24) communicated with the side part of the top cap cavity (81) is formed in the side wall of the lower part of the top cap (8), the drainage pipeline (24) is communicated with the liquid measuring pipe (14) through a pipeline B (31), and a water stop clamp (29) is installed on the pipeline B (31); the top cap (8) top is opened there is the exhaust duct that is linked together with top cap chamber (81) top, top cap (8) top is equipped with blast pipe (15) that are linked together with the exhaust duct, is equipped with discharge valve on blast pipe (15).
2. A test apparatus for use in a soil sample consolidation test and penetration test with gas as claimed in claim 1, wherein: the system also comprises a computer data processing system (33), and the pressure sensor A (4) and the pressure sensor B (19) are respectively and electrically connected with the computer data processing system (33).
3. A test device for a soil sample consolidation test and penetration test with gas according to claim 1 or 2, wherein: the bottom of the piston (18) is provided with a drainage pressure groove (28) communicated with all vertical channels (27), a porous plate (12) positioned below the drainage pressure groove (28) is arranged at the bottom of the piston (18), and filter paper is also arranged between the porous plate (12) and the bottom of the piston (18).
4. A test device for a soil sample consolidation test and penetration test with gas according to claim 1 or 2, wherein: the outer side wall of the top cap (8) is provided with a drain pipe communicated with the exhaust pipeline, and the drain pipe is provided with a drain valve (5).
5. A test device for a soil sample consolidation test and penetration test with gas according to claim 1 or 2, wherein: the top plane of the top cap (8) is provided with a bearing head (9).
6. A test device for a soil sample consolidation test and penetration test with gas according to claim 1 or 2, wherein: the top plane height of the permeable stone (25) is higher than the height of the water flow channel B (21), and the top plane height of the permeable stone (25) is higher than the height of the water flow channel C (22).
7. A test device for a soil sample consolidation test and penetration test with gas according to claim 1 or 2, wherein: three bolts (17) which are 120 degrees each other are connected between the upper ring (6) and the base (1) to tightly press and fix the middle ring (10), a circular groove A is arranged in the center of the top of the base (1), the bottom of the middle ring (10) is matched and inserted into the circular groove A of the base (1), and an O-shaped sealing ring B (26) is matched and installed between the bottom of the middle ring (10) and the top of the base (1); the bottom of the upper ring (6) is provided with a circular groove B, the top of the middle ring (10) is matched and inserted into the circular groove B of the upper ring (6), and an O-shaped sealing ring C (32) is matched and installed between the top of the middle ring (10) and the bottom of the upper ring (6).
8. A test apparatus for use in a soil sample consolidation test and permeation test with gas as claimed in claim 4, wherein: the bottom of the top cap (8) is provided with a circular groove C, the top of the piston (18) is matched and inserted into the circular groove C of the top cap (8), an O-shaped sealing ring A (7) is also arranged between the top of the piston (18) and the bottom of the top cap (8), and a plurality of O-shaped sealing rings A (7) are matched and arranged on the outer side wall of the lower part of the piston (18); the top surface of the top cap cavity (81) of the top cap (8) forms an included angle of 15 degrees with the horizontal plane.
9. The test method for the consolidation test and the penetration test of the gas-containing soil sample is characterized by comprising the following steps of: the method comprises the following steps:
A. and (3) installing a test device: placing the base (1) on a level-adjusting consolidation apparatus, adjusting the base (1) to a horizontal position, mounting the middle ring (10) on the top of the base (1) coated with vaseline, and sealing an O-ring B (26) between the top of the base (1) and the bottom of the middle ring (10) before mounting the middle ring (10); placing a rubber water bag (2) in a lower water bag placing cavity in a middle ring (10), enabling a pipe head of the rubber water bag (2) to be communicated with a water flow channel A (30) in a sealing mode, installing a pressure sensor B (19) on a water outlet pipe at a three-way valve A (3), enabling the pressure sensor B (19) to be connected with a computer data processing system (33), then opening a water inlet valve of the three-way valve A (3), laterally pouring a base (1) together with the middle ring (10), enabling the water flow channel A (30) to face upwards vertically, slowly injecting deaerated water into the rubber water bag (2) through a water inlet at the three-way valve A (3) by adopting a medical injector, discharging air in the rubber water bag (2), and closing the water inlet valve of the three-way valve A (3) when the rubber water bag (2) is completely filled with water; resetting the base (1) together with the middle ring (10) and keeping the water outlet pipe at the position of the three-way valve A (3) and the pressure sensor B (19) in a communication state; the pipeline A (20) is communicated with the water flow channel C (22) of the middle ring (10) in a sealing way, the three-way valve B (23) is arranged on the pipeline A (20), and the water supply device (16) and the flow measuring pipe (13) are respectively communicated with the other two interfaces of the three-way valve B (23) through the pipeline; a pressure sensor A (4) is connected at a water flow channel B (21) of the middle ring (10) in a sealing way, and the pressure sensor A (4) is connected with a computer data processing system (33); sealing the upper ring (6) on the top of the middle ring (10), sealing an O-shaped sealing ring C (32) between the upper ring (6) and the middle ring (10), connecting and fixing the upper ring (6) and the base (1) by three bolts (17) forming 120 degrees with each other, and tightening all the bolts (17) to press the middle ring (10); then sequentially placing wet water-permeable stone (25) and soaked filter paper on the top of a rubber water bag (2) in a middle ring (10), filling the prepared gas-containing soil sample (11) into an upper soil sample cavity at the upper part of the rubber water bag (2), standing for at least 36 hours, sucking away water precipitated on the surface of the gas-containing soil sample (11) after the self-weight consolidation settlement of the gas-containing soil sample (11) is completed, placing a porous plate (12) on the upper surface of the gas-containing soil sample (11), and then placing a layer of soaked filter paper; a piston (18) is installed in the upper ring (6) in a lifting and sliding manner, a plurality of O-shaped sealing rings A (7) are arranged on the contact surface between the outer wall of the piston (18) and the inner wall of the upper ring (6) in a sealing manner, the lower surface of the piston (18) is in contact with a porous plate (12), and meanwhile, a proper amount of vaseline is smeared on the outer side wall of the piston (18); covering the top cap (8), communicating a drainage pipeline (24) at the side part of the top cap (8) with the liquid measuring pipe (14) through a pipeline B (31), opening an exhaust valve of the exhaust pipe (15) and loosening a water stopping clamp (29) on the pipeline B (31), injecting deaerated water into the liquid measuring pipe (14) until the water overflows from the exhaust pipe (15) of the top cap (8), stopping water injection, and closing the exhaust valve of the exhaust pipe (15); placing the test device with the gas-containing soil sample (11) at a preset position of a pressurizing table, wherein the pressurizing table is provided with a pressurizing device and a dial indicator, the pressurizing device is provided with a pressurizing rod, the bottom end of the pressurizing rod of the pressurizing device is contacted with a bearing head (9) at the top end of a top cap (8), and the dial indicator is adjusted so that the dial indicator is just placed at the central position of the top end of the pressurizing rod;
B. before formal loading, a pre-pressing load is firstly applied through a pressing device, so that the pressure applied to the gas-containing soil sample (11) displayed by a pressure sensor B (19) is 1kPa, after the pressure is stabilized, a dial indicator is reset to zero, the height H of the gas-containing soil sample (11) at the moment is measured, and the pore ratio e is calculated 0 I.e. the initial void ratio before the test, and the reading of the measuring tube (14) is recorded as V 1 ；
C. Applying external load through a pressurizing device, enabling the pressure applied to the gas-containing soil sample (11) displayed by a pressure sensor B (19) to be 2kPa, recording readings of a dial indicator at all time nodes, and simultaneously observing dissipation conditions of pore pressure in the gas-containing soil sample (11) through a pressure sensor A (4), and keeping the consolidation pressure of 2kPa unchanged until the pore pressure in the gas-containing soil sample (11) is dissipated to be zero;
D. when the pore pressure dissipates to zero, the deformation h of the gas-containing soil sample (11) is obtained according to the reading of the dial indicator i1 The height of the gas-containing soil sample (11) after consolidation under the current level load is H i1 ＝H-h i1 The current level load is the consolidation pressure of 2kPa of the step C, byObtaining the porosity of the gas-containing soil sample (11) at the moment, and simultaneously reading the reading V of the measuring tube (14) 2 There is V w +V g ＝V 2 -V 1 Wherein V is w The volume of water discharged for the gas-containing soil sample (11) loaded in the present stage, V g The volume of the discharged gas is used for the gas-containing soil sample (11) loaded at the current stage; opening the exhaust valve of the exhaust pipe (15) at the upper part of the top cap (8), completely removing the gas accumulated at the top of the top cap cavity (81) of the top cap (8), closing the exhaust valve of the exhaust pipe (15), recording the volume reading in the liquid measuring pipe (14) at the moment, wherein the change amount before and after the exhaust is DeltaV, namely DeltaV=V g The volume amount of the discharged gas of the gas-containing soil sample (11) in the current stage of load consolidation test is V g The present-stage load consolidation test is a test under the consolidation pressure of 2kPa in the step C, and the corresponding volume amount of the discharged water of the gas-containing soil sample (11) in the present-stage load consolidation test is V w ＝V 2 -V 1 -△V。
10. A test method for a soil sample consolidation test and penetration test with gas according to claim 9, wherein: the step D further comprises the following steps of E and F:
E. penetration test: after the consolidation test is finished, a permeation test of the gas-containing soil sample (11) can be carried out, the water-stopping clamp (29) is used for pinching off the water-draining pipeline (24) to drain water outwards, the water-draining valve (5) on the water-draining pipe at the top of the top cap (8) is opened, and water entering the top cap cavity (81) in the top cap (8) can be freely drained; regulating the three-way valve B (23) and injecting deaerated water into the flow measuring pipe (13) through the water supply device (16) to enable the water head height in the flow measuring pipe (13) to be 1m, and stopping water supply after the water head in the pipe is stable; regulating three-way valve B(23) The water in the measuring tube (13) slowly permeates and passes through the gas-containing soil sample (11), and when the water is discharged from the water discharge pipe at the top of the top cap (8), the initial water head height h in the measuring tube (13) is measured 1 And corresponding time t 1 Recording the head height h in the flow tube (13) again after a while 2 And corresponding time t 2 Recording the water head height h and the corresponding time t in the flow measuring tube (13) at the moment until the water head height in the final flow measuring tube (13) is unchanged; repeating the operation of the permeability test for M times, changing the water head height in the flow measuring pipe (13) during each permeability test, and finally calculating the permeability coefficient of the gas-containing soil sample (11) according to the saturated soil water head-changing permeability test method in the conventional geotechnical test;
F. and (3) continuously applying external load through the pressurizing device, and repeating the operations from the step C to the step E, so that the consolidation test and penetration test result data of the gas-containing soil sample (11) under the consolidation pressure of each level can be obtained sequentially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811566961.3A CN109342150B (en) | 2018-12-19 | 2018-12-19 | Test device and method for gas-containing soil sample consolidation test and permeation test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811566961.3A CN109342150B (en) | 2018-12-19 | 2018-12-19 | Test device and method for gas-containing soil sample consolidation test and permeation test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109342150A CN109342150A (en) | 2019-02-15 |
| CN109342150B true CN109342150B (en) | 2023-12-19 |
Family
ID=65304735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811566961.3A Active CN109342150B (en) | 2018-12-19 | 2018-12-19 | Test device and method for gas-containing soil sample consolidation test and permeation test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342150B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489882A (en) * | 2018-04-03 | 2018-09-04 | 榆林学院 | It is a kind of can more experiment control conditions Seep- Solidifying experimental provision and application method |
| CN110160925B (en) * | 2019-03-19 | 2024-02-23 | 云南省城乡建设投资有限公司 | Geotechnical test pneumatic consolidation permeameter and test monitoring method thereof |
| CN110044713A (en) * | 2019-04-22 | 2019-07-23 | 河海大学 | A kind of the piston vapour-pressure type consolidation testing device and method of grouting behind shaft or drift lining slurries |
| CN110389100A (en) * | 2019-08-21 | 2019-10-29 | 桂林理工大学 | Temperature Control Type permeameter and its experimental method |
| CN111982699B (en) * | 2020-09-01 | 2023-03-21 | 西南交通大学 | Unsaturated soil compression characteristic and permeability characteristic test device |
| CN112365782B (en) * | 2020-11-03 | 2022-10-04 | 浙大城市学院 | Gas-containing soil deformation experiment model system and experiment method |
| CN113848117B (en) * | 2021-09-26 | 2022-07-26 | 浙江大学 | Vertical shaft foundation hot drainage consolidation test device |
| CN113916674B (en) * | 2021-10-28 | 2023-12-26 | 江南工业集团有限公司 | U-shaped cylinder pressure test device and test method |
| CN114034620B (en) * | 2021-11-08 | 2022-09-16 | 四川大学 | Method for determining permeability of cohesive soil body by utilizing columnar experiment |
| CN114166601B (en) * | 2021-12-02 | 2022-10-21 | 浙江大学 | Bidirectional press-in type triaxial sample preparation device and method based on soil stress history |
| CN117589657B (en) * | 2024-01-19 | 2024-04-12 | 四川国齐检测技术有限公司 | Water conservancy project concrete material waterproof experiment equipment and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699997A (en) * | 2005-06-16 | 2005-11-23 | 长安大学 | Soil one-dimensional consolidation, penetration and stress looseness comprehensive test apparatus and method of use thereof |
| CN101915718A (en) * | 2010-08-20 | 2010-12-15 | 中国科学院武汉岩土力学研究所 | Multifunctional soil consolidation and penetration test device and test method thereof |
| CN103411869A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Negative pressure osmosis test device |
| CN107192811A (en) * | 2017-05-05 | 2017-09-22 | 哈尔滨工业大学深圳研究生院 | A kind of latent erosion visual measuring device of level of large deformation totally-enclosed |
| CN107436140A (en) * | 2017-07-22 | 2017-12-05 | 浙江大学 | The settling column test instrument and test method that vacuum preloading and piling prepressing are combined |
| CN107631976A (en) * | 2017-10-23 | 2018-01-26 | 桂林理工大学 | Seepage consolidation instrument and its application under chemico-mechanic coupling |
| CN107941604A (en) * | 2018-01-10 | 2018-04-20 | 中国科学院武汉岩土力学研究所 | A kind of consolidation testing device and test method of gassiness soil |
| CN208140705U (en) * | 2018-05-16 | 2018-11-23 | 武汉理工大学 | It is a kind of can automatic collection pore pressure permeability consolidometer |
| CN209327074U (en) * | 2018-12-19 | 2019-08-30 | 中国科学院武汉岩土力学研究所 | A kind of experimental rig for gassiness soil sample consolidation test and permeability test |
-
2018
- 2018-12-19 CN CN201811566961.3A patent/CN109342150B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699997A (en) * | 2005-06-16 | 2005-11-23 | 长安大学 | Soil one-dimensional consolidation, penetration and stress looseness comprehensive test apparatus and method of use thereof |
| CN101915718A (en) * | 2010-08-20 | 2010-12-15 | 中国科学院武汉岩土力学研究所 | Multifunctional soil consolidation and penetration test device and test method thereof |
| CN103411869A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Negative pressure osmosis test device |
| CN107192811A (en) * | 2017-05-05 | 2017-09-22 | 哈尔滨工业大学深圳研究生院 | A kind of latent erosion visual measuring device of level of large deformation totally-enclosed |
| CN107436140A (en) * | 2017-07-22 | 2017-12-05 | 浙江大学 | The settling column test instrument and test method that vacuum preloading and piling prepressing are combined |
| CN107631976A (en) * | 2017-10-23 | 2018-01-26 | 桂林理工大学 | Seepage consolidation instrument and its application under chemico-mechanic coupling |
| CN107941604A (en) * | 2018-01-10 | 2018-04-20 | 中国科学院武汉岩土力学研究所 | A kind of consolidation testing device and test method of gassiness soil |
| CN208140705U (en) * | 2018-05-16 | 2018-11-23 | 武汉理工大学 | It is a kind of can automatic collection pore pressure permeability consolidometer |
| CN209327074U (en) * | 2018-12-19 | 2019-08-30 | 中国科学院武汉岩土力学研究所 | A kind of experimental rig for gassiness soil sample consolidation test and permeability test |
Non-Patent Citations (1)
| Title |
|---|
| 逐级加载条件下低液限饱和黏土的渗透试验;李又云 等;公路交通科技;第34卷(第04期);第50-57页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109342150A (en) | 2019-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109342150B (en) | Test device and method for gas-containing soil sample consolidation test and permeation test | |
| CN107941604B (en) | Consolidation test device and test method for gas-containing soil | |
| US10488319B2 (en) | Testing apparatus for gas permeability in concrete and testing method therefor | |
| JP3381991B2 (en) | Water permeability measuring apparatus and water permeability measuring method using the same | |
| CN205246498U (en) | Infiltration consolidation apparatus | |
| CN109060543B (en) | Device for directly measuring insertion amount of rubber membrane in triaxial test and measuring method thereof | |
| CN209327074U (en) | A kind of experimental rig for gassiness soil sample consolidation test and permeability test | |
| CN109959553B (en) | Consolidation-permeation-shear wave velocity coupling experimental device | |
| CN105973782A (en) | Determination instrument and determination method for osmotic coefficients of drilling and coring test part | |
| CN104897540B (en) | A kind of unsaturated soil diffusion soil-column test device | |
| CN111238565B (en) | Test method for testing unsaturated geotechnical characteristic relation | |
| CN107063968B (en) | Concrete gas permeability testing device and method | |
| CN204255812U (en) | The device for testing permeability coefficient of original state coarse-grained soil | |
| CN103149341A (en) | Consolidation and penetration measuring device | |
| CN106706500A (en) | Device for determining permeability of concrete | |
| CN205280548U (en) | Simple and easy detection device of concrete porosity of permeating water | |
| CN106018239A (en) | Method and device for measuring permeability coefficients of stratums at different depths in field | |
| CN113218841A (en) | Device and method for testing reverse filtration characteristic of geotextile | |
| CN108397192A (en) | A kind of simple device and its method of grittiness soil body gas permeability measurement | |
| CN111610129A (en) | Method and device for measuring permeability coefficient of porous medium under multiple working conditions | |
| CN205981916U (en) | Controllable rock lateral restraint expansion rate survey device of side direction confined pressure | |
| CN110658120B (en) | Method and device for testing permeability coefficient of foam-improved sandy residue soil under high water pressure | |
| CN110487988A (en) | A kind of air pressure-loading type one-dimensional consolidation infiltration joint test device | |
| CN104359818A (en) | System for testing permeability coefficient of straw material | |
| CN116660305B (en) | Based on nuclear magnetism T 2 Method for measuring full-pore-size distribution of shale oil reservoir core of spectrum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |