CN209327074U - A kind of experimental rig for gassiness soil sample consolidation test and permeability test - Google Patents
A kind of experimental rig for gassiness soil sample consolidation test and permeability test Download PDFInfo
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- CN209327074U CN209327074U CN201822144115.4U CN201822144115U CN209327074U CN 209327074 U CN209327074 U CN 209327074U CN 201822144115 U CN201822144115 U CN 201822144115U CN 209327074 U CN209327074 U CN 209327074U
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- middle ring
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- 239000002689 soil Substances 0.000 title claims abstract description 93
- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 238000007596 consolidation process Methods 0.000 title claims abstract description 56
- 230000035699 permeability Effects 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 142
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229920001971 elastomer Polymers 0.000 claims abstract description 31
- 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 32
- 239000004575 stone Substances 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 5
- 239000002775 capsule Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims 1
- 238000001764 infiltration Methods 0.000 abstract description 11
- 230000008595 infiltration Effects 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 14
- 239000011148 porous material Substances 0.000 description 6
- 239000011800 void material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 229940099259 vaseline Drugs 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a kind of experimental rigs for gassiness soil sample consolidation test and permeability test, including pedestal, base top is connected with middle ring, ring is installed at the top of middle ring, middle ring lower part is equipped with rubber bag with water, is equipped with water injection pipe outside middle ring, triple valve A is communicated on water injection pipe, triple valve A is communicated with water inlet pipe and outlet pipe, and pressure sensor B is equipped on outlet pipe；It is provided with water stream channel B and water stream channel C in the middle part of middle ring, airtight connection has pressure sensor A, water stream channel C to be communicated with triple valve B by pipeline A at water stream channel B, and triple valve B is connected with flow tube and water supply device respectively by pipeline；Piston is installed, top land installs crown cap, and top cap lower part is provided with drainage pipeline, and drainage pipeline is connected to by pipeline B with measuring pipet in upper ring；Exhaust pipe is equipped at the top of top cap.The utility model is suitable for the infiltration of gassiness soil and consolidation test, has many advantages, such as that structure novel, cost is relatively low, improves the accuracy in measurement of test.
Description
Technical field
The utility model relates to geotechnical engineering soil test technique fields, more particularly to a kind of consolidate for gassiness soil sample to try
Test the experimental rig with permeability test.
Background technique
Gassiness soil, which refers to, has sealed gas phase, and the great soil group of gas phase preservation in the form of free, dissolution or air water compound etc.,
It is generally distributed in the shallow stratum of lakebed, river mouth, the lowest point, delta, sea bed and oily resource relative abundance.Wherein,
Rich in shallow gas and gas phase is with the gassiness soil for bubble phase preservation of dissociating, and generally has high moisture content, gas phase dissolution saturation and gas
Pressure is higher than the features such as atmospheric pressure, infiltration coefficient are small, in metastable equilibrium state.In geotechnical engineering field, for this generic attribute
Special, engineering properties is different from general saturated soil and the gassiness soil understanding of unsaturated soil is very few, and one of main difficulty is
It is short of exclusive testing equipment.And general consolidation infiltration experiment device is only suitable for the consolidation deformation parameter and infiltration of general saturated soil
The measurement of saturating parameter, due to that can only measure the displacement in consolidation process, and cannot measure the capacity in consolidation process,
Therefore it can not be suitable for the consolidation permeability test of gassiness soil.China Patent No. ZL201820038132.7 discloses a kind of gassiness soil
Consolidation testing device, including bracket, pressure measuring cylinder, piston, top cap, porous plate, guide rod, displacement sensor, total stress sensor,
Aqueous vapor measuring device, soil sample upper and lower surface hole water pressure measuring device to be measured, water inlet, conduit, pressure measuring cylinder are fixed on bracket
On；Piston is placed in pressure measuring cylinder；Guide rod is arranged in piston base；Displacement sensor is placed in frame bottom and is connected with guide rod；Top cap
And porous plate is arranged on consolidation chamber from top to bottom；The upper surface of piston is arranged in total stress sensor；Aqueous vapor measuring device
It is arranged in top cap；Water inlet is provided on pressure measuring cylinder；Conduit is provided on piston；Water inlet is connected with pressure chamber, external
External pressurized equipment；Soil sample upper and lower surface hole water pressure measuring device to be measured is connected with the upper and lower surface of soil sample to be measured respectively
It is logical.The device can be adapted for gassiness soil, can carry out the aqueous vapor separation and independent measurement in air seal and consolidation process；But
It is that the device cannot achieve the permeability test of gassiness soil, while operationally complex, is unfavorable for gassiness soil sample consolidation test
With the accurately and fast measurement of permeability test.
Utility model content
Place in view of the shortcomings of the prior art, it is solid for gassiness soil sample that the purpose of this utility model is to provide one kind
The experimental rig of knot test and permeability test had not only been suitable for gassiness soil while having intersected to carry out permeability test and consolidation test, but also energy
Overcome piston side wall frictional resistance error in consolidation process to influence, has many advantages, such as that structure novel, experimentation cost are lower, improve simultaneously
The accuracy in measurement of test.
The purpose of this utility model is achieved through the following technical solutions:
A kind of experimental rig for gassiness soil sample consolidation test and permeability test, including pedestal, middle ring, upper ring, piston,
Top cap, measuring pipet, flow tube and water supply device, the base top airtight connection have middle ring, closed installation at the top of the middle ring
There is upper ring, the internal cavities of the middle ring include top soil sample chamber and lower part water pocket placed cavity, are placed in the water pocket placed cavity of lower part
There is rubber bag with water, rubber bag with water has the tube head being connected with water pocket inner cavity, and the middle ring lower part is provided with the pipe with rubber bag with water
The water stream channel A that is connected of head, be equipped with outside the middle ring with the closed water injection pipe being connected to of water stream channel A, connect on water injection pipe
It is connected with triple valve A, the triple valve A is also communicated with water inlet pipe and outlet pipe, pressure sensor B is equipped on the outlet pipe；
Closed company at water stream channel B and water stream channel C, the water stream channel B higher than rubber bag with water height is provided in the middle part of the middle ring
It is connected to pressure sensor A, the water stream channel C is communicated with triple valve B by pipeline A, and the triple valve B is also distinguished by pipeline
It is connected with flow tube and water supply device；Be placed with permeable stone at the top of rubber bag with water in the middle ring internal cavities, it is described on
Piston is installed in the internal cavities of ring, runs through on piston and is provided with several Vertical Channels, the top land is closed to be equipped with
Top cap, the top cap inside have the top cap chamber being connected with Vertical Channel, and top cap lower sides are provided with and top cap chamber side phase
The drainage pipeline of connection, drainage pipeline are connected to by pipeline B with measuring pipet, are equipped with tongs on pipeline B；At the top of the top cap
It is provided with the exhaust pipe being connected with top cap top of chamber, the exhaust pipe being connected with exhaust pipe, row are equipped at the top of the top cap
Tracheae is equipped with exhaust valve.
In order to which the utility model is better achieved, the utility model further includes computer data processing system, the pressure
Sensors A is electrically connected with computer data processing system respectively with pressure sensor B.
Preferably, the piston base is equipped with the draining indent being connected with all Vertical Channels, the piston base
It is placed with the porous plate being located at below draining indent, is also placed with filter paper between the porous plate and piston base.
Preferably, the top cap top outer wall is equipped with the drainpipe being connected with exhaust pipe, the drainpipe
On drain valve is installed.
Preferably, being provided with carrier head in the plane of the top cap top.
Preferably, the top level of the permeable stone is higher than the height of water stream channel B, while the top plane of permeable stone
Height is higher than the height of water stream channel C.
Preferably, connection is there are three being mutually 120 ° of bolt to be fixed middle ring between the upper ring and pedestal, institute
Base top center is stated equipped with circular ring type groove A, the middle ring bottom cooperation is plugged in the circular ring type groove A of pedestal, middle ring
Zero type sealing ring B is fitted between bottom and base top；The upper ring bottom is equipped with circular ring type groove B, the middle ring
Top cooperation is plugged in the circular ring type groove B of ring, and it is close to be fitted with zero type between upper ring bottom at the top of the middle ring
Seal C.
Preferably, the top cap bottom is equipped with circular ring type groove C, the top land cooperation is plugged in the annulus of top cap
In type groove C, it is also equipped with zero type sealing ring A between the top land and top cap bottom, on the piston lower portion lateral wall
It is fitted with several zero type sealing rings A；The top surface of the top cap chamber of the top cap is horizontal by 15 ° of angles.
The zero type sealing ring A, zero type sealing ring B, zero type sealing ring C of the utility model are that the art public institute is ripe
It is circular rubber ring that the technology contents known, which are a kind of sections, because its overall appearance is in zero type, therefore is called zero type sealing ring,
It is mainly used between mechanical part the leakage for preventing liquids and gases medium, while can also be used as axially reciprocating and low speed
The dynamic sealing element of rotary motion；Zero type sealing ring is properly termed as circular seal ring again, plays to seal between two components and make
With.
A kind of test method for gassiness soil sample consolidation test and permeability test, including experimental rig, method and step
It is as follows:
A, experimental rig is installed: pedestal being placed on the consolidation apparatus of adjusting level and pedestal is adjusted to horizontal position, it will
Middle ring is installed to the base top for having applied vaseline, in an installation before ring, pads between base top and middle ring bottom
Upper zero type sealing ring B sealing；Rubber bag with water is placed in the lower part water pocket placed cavity in middle ring, so that the tube head of rubber bag with water
With water stream channel A is closed is connected to, pressure sensor B is installed on the outlet pipe at triple valve A, allows pressure sensor B and calculating
The connection of machine data processing system, then opens the water inlet valve of triple valve A, pedestal is fallen together with middle ring side, makes water stream channel A
Vertically upward, degassed water is slowly injected by the water inlet at triple valve A into rubber bag with water using injector for medical purpose, rubber is discharged
Air in glue capsule closes the water inlet valve of triple valve A when being completely filled in rubber bag with water by water；Pedestal is connected again
It is resetted with middle ring, and outlet pipe and pressure sensor B at triple valve A is kept to be in connected state；By the water of pipeline A and middle ring
The closed connection of circulation road C, triple valve B is installed on pipeline A, and water supply device, flow tube are passed through pipeline and threeway respectively
The another two interface of valve B is connected；The airtight connection pressure sensor A at the water stream channel B of middle ring, allow pressure sensor A with
Computer data processing system connection；By upper ring closed cover together at the top of middle ring, upper zero type is padded between upper ring and middle ring and is sealed
C sealing is enclosed, 120 ° of bolts is mutually with three and is connected and fixed upper ring with pedestal, tighten all bolts to compress middle ring；Then exist
The permeable stone of wet full water and the filter paper of infiltration, and the gassiness soil sample that will be prepared successively are put at the top of rubber bag with water in middle ring
Be fitted into the top soil sample chamber on rubber bag with water top, stand at least 36 hours, to gassiness soil sample self weight consolidation settlement complete with
Afterwards, the water that gassiness soil sample surface is precipitated is siphoned away, places porous plate in gassiness soil sample upper surface, then puts the filter of one layer of infiltration
Paper；Lifting carriage installs piston in upper ring, several upper zero types will be padded on the contact surface between piston outer wall and upper ring inner wall
Sealing ring A sealing, and piston lower surface is contacted with porous plate, while smearing suitable vaseline in the lateral wall of piston；
Top cap is covered, the drainage pipeline of top cap side is connected with measuring pipet by pipeline B, opens exhaust valve and the pine of exhaust pipe
Tongs on open pipe road B, degassed water is injected into measuring pipet, until water is overflowed from the exhaust pipe of top cap, then stops note
Water and the exhaust valve for closing exhaust pipe；The experimental rig for having installed gassiness soil sample is placed on pressurization platform predetermined position, pressurize platform
Predetermined position is equipped with pressurizing device and dial gauge, and pressurizing device has pressure rod, by the pressure rod bottom end of pressurizing device and top
The carrier head at crown end is in contact, and adjusts dial gauge, and dial gauge is made to be placed in the top central location of pressure rod just；
B, before formal load, prefabricating load is first applied by pressurizing device, so that being applied to of showing of pressure sensor B contains
Pressure in gas soil sample is 1kPa, by dial gauge rezeroing after stablizing, measures the height H of gassiness soil sample at this time, calculates hole
Compare e0, as test before initial void ratio, and write down at this time measuring pipet reading be V1；
C, external load is applied by pressurizing device, so that the pressure being applied in gassiness soil sample that pressure sensor B is shown
For 2kPa, dial gauge is recorded in the reading of each timing node, while pore pressure in gassiness soil sample is observed by pressure sensor A
Dissipation situation keeps the consolidation pressure of 2kPa constant until pore pressure is dissipated as zero in gassiness soil sample；
D, when pore pressure dissipation is zero, specimen deformation amount h is obtained according to percentage meter readingi1, then after being consolidated under the same level load
Gassiness soil sample height is Hi1=H-hi1, the same level load is the 2kPa consolidation pressure of step C, is passed throughIt obtains
The void ratio of gassiness soil sample at this time reads simultaneously the reading V of measuring pipet at this time2, there is Vw+Vg=V2-V1, wherein VwFor the same level load
Gassiness soil sample discharge water volume, VgThe volume of gas is discharged for the gassiness soil sample of the same level load；Open top cap top
The exhaust valve of exhaust pipe, the gas of the top cap top of chamber to exclude to be gathered in top cap completely close the exhaust valve of exhaust pipe, record
The variable quantity of volume reading in measuring pipet at this time, exhaust front and back is △ V, that is, has △ V=Vg, in the same level load consolidation test
The volume of middle gassiness soil sample discharge gas is Vg, the same level load consolidation test is the test under the 2kPa consolidation pressure of step C, phase
The volume for the discharge water of the gassiness soil sample in the same level load consolidation test answered is Vw=V2-V1-△V；
E, permeability test: after consolidation test, then the permeability test of gassiness soil sample can be carried out, nips off draining with tongs
Pipeline drains outward, opens the drain valve at the top of top cap on drainpipe, and the water allowed access into inside top cap in top cap chamber can be certainly
By being discharged；Regulating three-way valve B simultaneously infuses degassed water into flow tube by water supply device, makes the head height 1m in flow tube,
Stop supplying water after head in pipe is stablized；Regulating three-way valve B penetrates into the water in flow tube slowly and by gassiness soil sample, wait push up
When crown portion drainpipe has water discharge, start to survey starting head height h in note flow tube1With corresponding time t1, every a period of time
Record the head height h in flow tube again afterwards2With corresponding time t2, when the head height in final flow tube is constant,
Record the head height h and corresponding time t in the flow tube at the moment；Aforesaid operations M times of repeated penetration test, every sub-percolation
The head height in flow tube need to be converted when test, it finally can be according to saturated soil variable head permeability test in conventional soil test
The infiltration coefficient of gassiness soil sample at this time is calculated in method；
F, external load is continued to by pressurizing device, the operation for the C to step E that repeats the above steps can successively obtain
Consolidation test and permeability test result data of the gassiness soil sample under consolidation pressures at different levels.
The utility model compared with the prior art, have the following advantages that and the utility model has the advantages that
(1) the utility model can either carry out the consolidation test of gassiness soil, also be able to carry out the permeability test of gassiness soil.Together
When, the utility model also overcomes the influence of existing apparatus piston side wall frictional resistance, can measure to act on more accurately and contains
Consolidation pressure in gas soil sample has many advantages, such as structure novel, easy to operate.
(2) the utility model had not only been suitable for gassiness soil while having intersected to carry out permeability test and consolidation test, but also can overcome solid
Piston side wall frictional resistance error influences during knot, has many advantages, such as that structure novel, experimentation cost are lower, while improving test
Accuracy in measurement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the draining indent structural schematic diagram of the utility model piston base.
Wherein, title corresponding to the appended drawing reference in attached drawing are as follows:
1 pedestal, 2 rubber bag with water, 3 triple valve A, 4 pressure sensor A, 5 drain valves, ring on 6,7 zero type sealing ring A, 8 tops
Cap, 81 top cap chambers, 9 carrier heads, 10 middle rings, 11 gassiness soil samples, 12 porous plates, 13 flow tubes, 14 measuring pipets, 15 exhaust pipes, 16
Water supply device, 17 bolts, 18 pistons, 19 pressure sensor B, 20 pipeline A, 21 water stream channel B, 22 water stream channel C, 23 triple valves
B, 24 drainage pipelines, 25 permeable stones, 26 0 type sealing ring B, 27 Vertical Channels, 28 draining indents, 29 tongs, 30 water stream channels
A, 31 pipeline B, 32 0 type sealing ring C, 33 computer data processing systems.
Specific embodiment
The utility model is described in further detail below with reference to embodiment:
Embodiment
As shown in FIG. 1 to FIG. 2, a kind of experimental rig for gassiness soil sample consolidation test and permeability test, including pedestal
1, middle ring 10, upper ring 6, piston 18, top cap 8, measuring pipet 14, flow tube 13 and water supply device 16,1 top airtight connection of pedestal have
Middle ring 10,10 top of middle ring is closed to be equipped with ring 6, and the internal cavities of middle ring 10 include that top soil sample chamber and lower part water pocket are placed
Chamber, rubber bag with water 2 is placed in the water pocket placed cavity of lower part, and rubber bag with water 2 has the tube head being connected with water pocket inner cavity, middle ring 10
Lower part is provided with the water stream channel A30 being connected with the tube head of rubber bag with water 2, is equipped with outside middle ring 10 close with water stream channel A30
The water injection pipe of connection is closed, is communicated with triple valve A3 on water injection pipe, triple valve A3 is also communicated with water inlet pipe and outlet pipe, on outlet pipe
Pressure sensor B19 is installed.The water stream channel B21 and water stream channel higher than 2 height of rubber bag with water are provided in the middle part of middle ring 10
Airtight connection has pressure sensor A4, water stream channel C22 to be communicated with triple valve by pipeline A20 at C22, water stream channel B21
B23, triple valve B23 also pass through pipeline and are connected respectively with flow tube 13 and water supply device 16.Rubber in 10 internal cavities of middle ring
It is placed with permeable stone 25 at the top of glue capsule 2, piston 18 is installed in the internal cavities of upper ring 6, it is several through being provided on piston 18
Vertical Channel 27, the 18 closed installation crown cap 8 in top of piston, with the top cap being connected with Vertical Channel 27 inside top cap 8
Chamber 81,8 lower sides of top cap are provided with the drainage pipeline 24 being connected with 81 side of top cap chamber, and drainage pipeline 24 passes through pipeline B31
It is connected to measuring pipet 14, tongs 29 is installed on pipeline B31.The row being connected at the top of top cap chamber 81 is provided at the top of top cap 8
Feed channel, the exhaust pipe 15 being connected with exhaust pipe is equipped at the top of top cap 8, and exhaust pipe 15 is equipped with exhaust valve.
The utility model further includes computer data processing system 33, and pressure sensor A4 and pressure sensor B19 distinguish
It is electrically connected with computer data processing system 33.
As shown in Fig. 2, 18 bottom of piston is equipped with the draining indent 28 being connected with all Vertical Channels 27,18 bottom of piston
It is placed with the porous plate 12 for being located at 28 lower section of draining indent, porous plate 12 and piston are also placed with filter paper between 18 bottom.
As shown in Figure 1,8 top outer wall of top cap is equipped with the drainpipe being connected with exhaust pipe, installed on drainpipe
There is drain valve 5.Top cap 8 pushes up and is provided with carrier head 9 in plane.
The top level of the preferred permeable stone 25 of the utility model is higher than the height of water stream channel B21, while permeable stone
25 top level is higher than the height of water stream channel C22.
There are three be mutually 120 ° of bolt 17 to be fixed middle ring 10,1 top of pedestal for connection between upper ring 6 and pedestal 1
Center is equipped with circular ring type groove A, and the cooperation of 10 bottom of middle ring is plugged in the circular ring type groove A of pedestal 1,10 bottom of middle ring and pedestal
Zero type sealing ring B26 is fitted between 1 top.Upper 6 bottom of ring is equipped with circular ring type groove B, cooperates grafting at the top of middle ring 10
In the circular ring type groove B of Yu Shanghuan 6, zero type sealing ring C32 is fitted between 10 top of middle ring and 6 bottom of upper ring.
8 bottom of top cap is equipped with circular ring type groove C, cooperates at the top of piston 18 and is plugged in the circular ring type groove C of top cap 8, living
It is also equipped with zero type sealing ring A7 between 18 top of plug and 8 bottom of top cap, is fitted on 18 lower outside wall of piston several
A zero type sealing ring A7 (in use, be equipped between 6 inner wall of piston 18 and upper ring≤gap of 0.5mm, and in piston 18 and upper ring
Water proof is sealed by zero type sealing ring A7 between 6 inner walls).The top surface of the top cap chamber 81 of top cap 8 is horizontal by 15 °
Angle.
A kind of test method for gassiness soil sample consolidation test and permeability test, including experimental rig, method and step
It is as follows:
A, experimental rig is installed: pedestal 1 being placed on the consolidation apparatus of adjusting level and pedestal 1 is adjusted to horizontal position,
Middle ring 10 is installed to 1 top of pedestal for having applied vaseline, in an installation before ring 10, in 1 top of pedestal and middle ring 10
Upper zero type sealing ring B26 sealing is padded between bottom.Rubber bag with water 2 is placed in the lower part water pocket placed cavity in middle ring 10, is made
The tube head of rubber bag with water 2 with water stream channel A30 is closed is connected to, pressure sensor is installed on the outlet pipe at triple valve A3
B19 allows pressure sensor B19 to connect with computer data processing system 33, then opens the water inlet valve of triple valve A3.It will
Pedestal 1 falls together with 10 side of middle ring, and water stream channel A30 is made upward, to pass through the water inlet at triple valve A3 using injector for medical purpose vertically
Mouth slowly injects degassed water into rubber bag with water 2, and the air in rubber bag with water 2 is discharged, when being completely filled in rubber bag with water 2 by water
When, close the water inlet valve of triple valve A3；Pedestal 1 is resetted together with middle ring 10 again, and keeps the outlet pipe at triple valve A3
Connected state is in pressure sensor B19.By pipeline A20 with the water stream channel C22 of middle ring 10 is closed is connected to, by triple valve
B23 is installed on pipeline A20, and water supply device 16, flow tube 13 are passed through to the another two interface of pipeline and triple valve B23 respectively
It is connected.The airtight connection pressure sensor A4 at the water stream channel B21 of middle ring 10, allows pressure sensor A4 and computer data
Processing system 33 connects.By upper 6 closed cover of ring together in 10 top of middle ring, upper zero type sealing ring is padded between upper ring 6 and middle ring 10
C32 sealing, is mutually 120 ° of bolts 17 with three and is connected and fixed upper ring 6 with pedestal 1, tighten all bolts 17 to compress middle ring
10.Then the permeable stone 25 of wet full water and the filter paper of infiltration are successively put in 2 top of rubber bag with water in middle ring 10, and will system
The gassiness soil sample 11 got ready is fitted into the top soil sample chamber on 2 top of rubber bag with water, at least 36 hours is stood, to gassiness soil sample 11
After consolidation settlement of being self-possessed is completed, the water that 11 surface of gassiness soil sample is precipitated is sucked out, and porous plate 12 is placed in gassiness soil sample 11,
Then the filter paper of one layer of infiltration is put.Lifting carriage installs piston 18 in upper ring 6, will be between 6 inner wall of 18 outer wall of piston and upper ring
Contact surface on pad upper several zero type sealing ring A7 sealing, and 18 lower surface of piston is contacted with porous plate 12, at the same
The lateral wall of piston 18 smears suitable vaseline.Cover top cap 8, by pipeline B31 by the drainage pipeline 24 of 8 side of top cap with
Measuring pipet 14 is connected, and opens the exhaust valve of exhaust pipe 15 and unclamps the tongs 29 on pipeline B31, infuses into measuring pipet 14
Enter degassed water, until water is overflowed from the exhaust pipe 15 of top cap 8, then stops the exhaust valve for filling the water and closing exhaust pipe 15.It will
Installed gassiness soil sample 11 experimental rig be placed on pressurization platform predetermined position, pressurization platform predetermined position be equipped with pressurizing device and
Dial gauge, pressurizing device have pressure rod, the pressure rod bottom end of pressurizing device are in contact with the carrier head 9 on 8 top of top cap, and
Dial gauge is adjusted, dial gauge is made to be placed in the top central location of pressure rod just.
B, before formal load, prefabricating load is first applied by pressurizing device, so that being applied to of showing of pressure sensor B19
Pressure in gassiness soil sample 11 is that 1kPa by dial gauge rezeroing after stablizing measures the height H of gassiness soil sample 11 at this time, is calculated
Void ratio e out0, as test before initial void ratio, and write down at this time measuring pipet 14 reading be V1。
C, external load is applied by pressurizing device, so that being applied in gassiness soil sample 11 of showing of pressure sensor B19
Pressure is 2kPa, records dial gauge in the reading of each timing node, while observing gassiness soil sample 11 by pressure sensor A4
The dissipation situation of middle pore pressure keeps the consolidation pressure of 2kPa constant until pore pressure is dissipated as zero in gassiness soil sample 11.
D, when pore pressure dissipation is zero, 11 deflection h of gassiness soil sample is obtained according to percentage meter readingi1, then under the same level load
Gassiness soil sample height is H after consolidationi1=H-hi1, the same level load is the 2kPa consolidation pressure of step C, is passed throughThe void ratio for obtaining gassiness soil sample 11 at this time reads simultaneously the reading V of measuring pipet 14 at this time2, there is Vw+Vg
=V2-V1, wherein VwThe volume of water, V are discharged for the gassiness soil sample 11 of the same level loadgFor 11 row of gassiness soil sample of the same level load
The volume of outlet.Open the exhaust valve of the exhaust pipe 15 on 8 top of top cap, the top cap chamber 81 to exclude to be gathered in top cap 8 completely
The gas at top closes the exhaust valve of exhaust pipe 15, records the volume reading in measuring pipet 14 at this time, is vented the variation of front and back
Amount is △ V, that is, has △ V=Vg, it is V that the volume of gas, which is discharged, in gassiness soil sample 11 in the same level load consolidation testg, the same level load
Consolidation test is the test under the 2kPa consolidation pressure of step C, accordingly 11 row of gassiness soil sample in the same level load consolidation test
The volume of water outlet is Vw=V2-V1-△V。
E, permeability test: after consolidation test, then the permeability test of gassiness soil sample 11 can be carried out, is nipped off with tongs 29
Drainage pipeline 24 drains outward, opens the drain valve 5 on 8 top drainpipe of top cap, allows access into 8 inside top cap chamber 81 of top cap
Water can freely be discharged.Regulating three-way valve B23 simultaneously infuses degassed water into flow tube 13 by water supply device 16, makes flow tube 13
In head height be 1m, after in pipe head stablize after stop supply water.Regulating three-way valve B23 seeps the water in flow tube 13 slowly
Enter and pass through gassiness soil sample 11, when 8 top drainpipe of top cap has water discharge, starts to originate head height in survey note flow tube 13
h1With corresponding time t1, record the head height h in flow tube 13 again after a period of time2With corresponding time t2, until
When head height in final flow tube 13 is constant, the head height h and corresponding time t in the flow tube 13 at the moment are recorded.
Aforesaid operations M times of repeated penetration test, when each permeability test, need to convert the head height in flow tube 13, finally can root
The infiltration coefficient of gassiness soil sample 11 at this time is calculated according to saturated soil variable head permeability test method in conventional soil test.
F, external load is continued to by pressurizing device, the operation for the C to step E that repeats the above steps can successively obtain
(consolidation pressures at different levels include 4kPa, 8kPa, 16kPa, 32kPa ... etc. to gassiness soil sample 11, i.e., by adding under consolidation pressures at different levels
Pressure device applies external load so that the pressure being applied in gassiness soil sample 11 that show of pressure sensor B19 be 4kPa, 8kPa,
16kPa, 32kPa ... etc.) consolidation test and permeability test result data, i.e., acquisition gassiness soil sample 11 under consolidation pressures at different levels
The compressed coefficient, infiltration coefficient and void ratio, and then evaluate gassiness soil sample 11 consolidation and Penetration Signature.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (8)
1. a kind of experimental rig for gassiness soil sample consolidation test and permeability test, it is characterised in that: including pedestal (1), in
Ring (10), upper ring (6), piston (18), top cap (8), measuring pipet (14), flow tube (13) and water supply device (16), the pedestal
(1) top airtight connection has middle ring (10), closed at the top of the middle ring (10) to be equipped with ring (6), the middle ring (10) it is interior
Portion's cavity includes top soil sample chamber and lower part water pocket placed cavity, and rubber bag with water (2), robber cement are placed in the water pocket placed cavity of lower part
Capsule (2) has the tube head being connected with water pocket inner cavity, and middle ring (10) lower part is provided with to be connected with the tube head of rubber bag with water (2)
Water stream channel A(30), is equipped with and the closed water injection pipe being connected to of water stream channel A(30), water injection pipe outside the middle ring (10)
On be communicated with triple valve A(3), the triple valve A(3) be also communicated with water inlet pipe and outlet pipe, pressure is installed on the outlet pipe
Force snesor B(19)；Be provided with the water stream channel B(21 higher than rubber bag with water (2) height in the middle part of the middle ring (10)) and water flow lead to
Road C(22), the water stream channel B(21) at airtight connection have pressure sensor A(4), the water stream channel C(22) pass through pipeline
A(20) be communicated with triple valve B(23), the triple valve B(23) also by pipeline respectively with flow tube (13) and water supply device
(16) it is connected；It is placed with permeable stone (25) at the top of rubber bag with water (2) in middle ring (10) internal cavities, the upper ring
(6) it is equipped in internal cavities piston (18), runs through on piston (18) and be provided with several Vertical Channels (27), the piston
(18) the closed installation crown cap (8) in top, the top cap (8) is internal to have the top cap chamber being connected with Vertical Channel (27)
(81), top cap (8) lower sides are provided with the drainage pipeline (24) being connected with top cap chamber (81) side, and drainage pipeline (24) passes through
Pipeline B(31) be connected to, pipeline B(31 with measuring pipet (14)) on tongs (29) are installed；It is provided with and pushes up at the top of the top cap (8)
The exhaust pipe being connected at the top of cap chamber (81), top cap (8) top are equipped with the exhaust pipe (15) being connected with exhaust pipe,
Exhaust pipe (15) is equipped with exhaust valve.
2. a kind of experimental rig for gassiness soil sample consolidation test and permeability test described in accordance with the claim 1, feature
Be: further including computer data processing system (33), the pressure sensor A(4) with pressure sensor B(19) respectively with meter
Calculation machine data processing system (33) electrical connection.
3. a kind of experimental rig for gassiness soil sample consolidation test and permeability test according to claim 1 or 2, special
Sign is: piston (18) bottom is equipped with the draining indent (28) being connected with all Vertical Channels (27), the piston
(18) bottom is placed with the porous plate (12) being located at below draining indent (28), the porous plate (12) and piston (18) bottom it
Between be also placed with filter paper.
4. a kind of experimental rig for gassiness soil sample consolidation test and permeability test according to claim 1 or 2, special
Sign is: top cap (8) the top outer wall is equipped with the drainpipe being connected with exhaust pipe, is equipped on the drainpipe
Drain valve (5).
5. a kind of experimental rig for gassiness soil sample consolidation test and permeability test according to claim 1 or 2, special
Sign is: being provided with carrier head (9) in the plane of top cap (8) top.
6. a kind of experimental rig for gassiness soil sample consolidation test and permeability test according to claim 1 or 2, special
Sign is: height of the top level of the permeable stone (25) higher than water stream channel B(21), while the top of permeable stone (25) is flat
Height of the face height higher than water stream channel C(22).
7. a kind of experimental rig for gassiness soil sample consolidation test and permeability test according to claim 1 or 2, special
Sign is: there are three be mutually 120 ° of bolt (17) to be fixed middle ring for connection between the upper ring (6) and pedestal (1)
(10), pedestal (1) top center is equipped with circular ring type groove A, and middle ring (10) the bottom cooperation is plugged in the circle of pedestal (1)
In ring groove A, zero type sealing ring B(26 is fitted between middle ring (10) bottom and pedestal (1) top)；The upper ring
(6) bottom is equipped with circular ring type groove B, and cooperation is plugged in the circular ring type groove B of ring (6) at the top of the middle ring (10), described
Zero type sealing ring C(32 is fitted between upper ring (6) bottom at the top of middle ring (10)).
8. a kind of experimental rig for gassiness soil sample consolidation test and permeability test according to claim 4, feature
Be: top cap (8) bottom is equipped with circular ring type groove C, and cooperation is plugged in the circular ring type of top cap (8) at the top of the piston (18)
In groove C, zero type sealing ring A(7 is also equipped between top cap (8) bottom at the top of the piston (18)), the piston (18)
Several zero types sealing ring A(7 is fitted on lower outside wall)；The top surface of the top cap chamber (81) of the top cap (8)
Horizontal by 15 ° of angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822144115.4U CN209327074U (en) | 2018-12-19 | 2018-12-19 | A kind of experimental rig for gassiness soil sample consolidation test and permeability test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822144115.4U CN209327074U (en) | 2018-12-19 | 2018-12-19 | A kind of experimental rig for gassiness soil sample consolidation test and permeability test |
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| Publication Number | Publication Date |
|---|---|
| CN209327074U true CN209327074U (en) | 2019-08-30 |
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ID=67727608
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822144115.4U Withdrawn - After Issue CN209327074U (en) | 2018-12-19 | 2018-12-19 | A kind of experimental rig for gassiness soil sample consolidation test and permeability test |
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| Country | Link |
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| CN (1) | CN209327074U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342150A (en) * | 2018-12-19 | 2019-02-15 | 中国科学院武汉岩土力学研究所 | A kind of experimental rig and method for gassiness soil sample consolidation test and permeability test |
| CN111982699A (en) * | 2020-09-01 | 2020-11-24 | 西南交通大学 | Unsaturated soil compression characteristic and permeability characteristic test device |
| CN113495048A (en) * | 2021-09-08 | 2021-10-12 | 南通华兴石油仪器有限公司 | High-pressure seepage test device |
-
2018
- 2018-12-19 CN CN201822144115.4U patent/CN209327074U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342150A (en) * | 2018-12-19 | 2019-02-15 | 中国科学院武汉岩土力学研究所 | A kind of experimental rig and method for gassiness soil sample consolidation test and permeability test |
| CN109342150B (en) * | 2018-12-19 | 2023-12-19 | 中国科学院武汉岩土力学研究所 | Test device and method for gas-containing soil sample consolidation test and permeation test |
| CN111982699A (en) * | 2020-09-01 | 2020-11-24 | 西南交通大学 | Unsaturated soil compression characteristic and permeability characteristic test device |
| CN113495048A (en) * | 2021-09-08 | 2021-10-12 | 南通华兴石油仪器有限公司 | High-pressure seepage test device |
| CN113495048B (en) * | 2021-09-08 | 2021-11-16 | 南通华兴石油仪器有限公司 | High-pressure seepage test device |
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