CN109030315A - Low stress originates one-dimensional compression-infiltration experiment system and its working method - Google Patents
Low stress originates one-dimensional compression-infiltration experiment system and its working method Download PDFInfo
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- CN109030315A CN109030315A CN201810959372.5A CN201810959372A CN109030315A CN 109030315 A CN109030315 A CN 109030315A CN 201810959372 A CN201810959372 A CN 201810959372A CN 109030315 A CN109030315 A CN 109030315A
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- 238000001764 infiltration Methods 0.000 title claims abstract description 28
- 238000002474 experimental method Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000007596 consolidation process Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 239000011148 porous material Substances 0.000 claims abstract description 14
- 230000008595 infiltration Effects 0.000 claims abstract description 8
- 239000004575 stone Substances 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000009738 saturating Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000012669 compression test Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a kind of low stresses to originate one-dimensional compression-infiltration experiment system, including testing stand, the top of the testing stand is provided with consolidation container, the top of the consolidation container is provided with pressure transmission bolt, the pressure transmission bolt is connected through pressure transmission frame with force transferring lever, low stress charging assembly and high stress charging assembly are provided on the force transferring lever, the lower part of the consolidation container is provided with head test suite；The invention further relates to the working methods that a kind of low stress originates one-dimensional compression-infiltration experiment system.Not only structure design is simple, reasonable by the present invention, but also not only realizes the compressive behavior of low stress Yu high stress soil sample, while can measure the infiltration coefficient and pore water pressure of different stress level soil samples.
Description
Technical field
The present invention relates to a kind of low stresses to originate one-dimensional compression-infiltration experiment system and its working method.
Background technique
In order to maintain the unimpeded and river flood carrying capacity in navigation channel, China inevitably carries out navigation channel and river on a large scale every year
The dredging dredging engineering in road, to generate a large amount of dredged mud.High-moisture percentage dredged mud mobility is big, and skeleton is in fluidised form, by force
Spend low, the ability of resistance to deformation is poor, since there are the essence of mobility and intensity is poor for crude sedimentation soil and high-moisture percentage dredged mud
Different, when the soil sample to high-moisture percentage carries out one-dimensional compression test, routine test instrument often has two: first is that conventional
The sample cap of consolidation container is metal material (copper 300g or so), and the higher soil sample of initial aqueous rate can be made to overflow sample preparation ring
Knife；Second is that the metal hanger (quality is about 319g) of normal pressures loading system, applies, soil sample area when as first order load
For 30cm2, then the load for being applied to soil sample is about 12.5kPa, native under the pressure for soil sample higher for initial aqueous rate
Sample easily overflows sample preparation cutting ring.
The processing mode of extensive dredged mud is nearest land acquisition at present, builds cofferdam, discarded dredged mud is discharged into
It is stored in stockyard, forms dredged mud stockyard, and the infiltration coefficient of dredged mud is technology ginseng very crucial in the disposition design of stockyard
Number, traditional penetration instrument can not carry out permeability test to fluidised form dredged mud, traditional consolidation container used in one-dimensional compression test due to
Bottom is not sealed processing to drainage channel, can not also carry out the permeability test of the soil body after different load actions.
Through to existing technical literature retrieve find, in recent years for one-dimensional compression test device carried out Self-pressurizing agri and
The improvement of data acquisition etc., but all fail to overcome the test predicament of above-mentioned fluidised form soil.
Summary of the invention
In view of the deficiencies in the prior art, technical problem to be solved by the invention is to provide a kind of low stresses to originate one-dimensional pressure
Contracting-infiltration experiment system and its working method, it is not only reasonable in design but also efficiently convenient.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of low stress originates one-dimensional compression-infiltration examination
Check system, including testing stand, the top of the testing stand are provided with consolidation container, and the top of the consolidation container is provided with pressure transmission
Bolt, the pressure transmission bolt are connected through pressure transmission frame with force transferring lever, and low stress load group is provided on the force transferring lever
Part and high stress charging assembly, the lower part of the consolidation container is provided with head test suite.
Further, the consolidation container includes the chassis that sequence is arranged from top to bottom, the first permeable stone, cutting ring, second
Permeable stone and sample cap are contained with soil sample in the cutting ring, and first permeable stone is placed in inside the center groove on chassis, institute
The lateral wall for stating cutting ring is arranged with the first retaining collar, and first retaining collar is placed on the outer ring surface on chassis, and described first
The first O font rubber ring is provided between retaining collar and chassis, it is fixed that the lateral wall of second permeable stone is arranged with second
Lantern ring, second retaining collar are placed on the first retaining collar, are set between second retaining collar and the first retaining collar
It is equipped with the 2nd O font rubber ring, the upper outside wall of the cutting ring is arranged with the 3rd O font rubber ring, the 3rd O font rubber
Cushion rubber is arranged between cutting ring and the first retaining collar.
Further, several tie down screws, several locks are equipped between the chassis and the second retaining collar
The circumferentially spaced-apart setting of tight screw rod, one end of the tie down screw are threadedly coupled with chassis, and the other end of the tie down screw passes through
It is locked after second retaining collar using locking nut.
Further, the head test suite includes head pipe, the first water pipe and the second water pipe, the head Guan Zong
To the side that consolidation container is arranged in, first water pipe and the second water pipe are horizontally installed on the two sides of consolidation container, the water
The upper end of head tube is provided with head graduated scale panel, and the lower end of the head pipe is through the first-class road junction of triple valve, second
One end of the first water pipe is accessed at road junction, and the third flow channel mouth of the triple valve is connected with pore pressure gauge, first water
The other end of pipe is connected after passing through chassis with the first permeable stone, and one end of second water pipe is connected with the first permeable stone,
The other end of second water pipe is provided with two-port valve.
Further, displacement dial gauge is provided at the top of the pressure transmission bolt, the bottom of the pressure transmission bolt is pressed in examination
In the top groove of sample cap, the pressure transmission frame includes upper beam interconnected, power transmission pull rod and lower beam, described
The middle part of pressure transmission bolt is connected through screw thread with upper beam, and the lower beam is connected through first axle with force transferring lever.
Further, the low stress charging assembly includes low stress counterweight hanging scaffold, the low stress counterweight hanging scaffold setting
In the underface of power transmission pull rod, the high stress charging assembly includes high stress counterweight hanging scaffold, and the high stress counterweight hanging scaffold is set
Set the side end in force transferring lever.
A kind of low stress originates the working method of one-dimensional compression-infiltration experiment system, including described in above-mentioned any one
Low stress originates one-dimensional compression-infiltration experiment system comprising the steps of: passes through low stress charging assembly, force transferring lever, consolidation
Container carries out low stress load to soil sample, carries out high stress to soil sample by high stress charging assembly, force transferring lever, consolidation container
Load, utilized head test suite can measure the infiltration coefficient and pore water pressure of different stress level soil samples.
Compared with prior art, the invention has the following advantages: the present invention not only structure design is simple, rationally, and
And the compressive behavior of low stress Yu middle high stress soil sample is not only realized, while the infiltration of different stress level soil samples can be measured
Coefficient and pore water pressure.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the organigram of the embodiment of the present invention.
Fig. 2 is the consolidation container schematic front view of the embodiment of the present invention.
Fig. 3 is the consolidation container schematic top plan view of the embodiment of the present invention.
Fig. 4 is the pressure transmission frame schematic side view of the embodiment of the present invention.
In figure: 1- testing stand, 2- consolidation container, the chassis 201-, the first permeable stone of 202-, 203- cutting ring, 204- second are saturating
Water stone, 205- sample cap, the first retaining collar of 206-, the first O font rubber ring of 207-, the second retaining collar of 208-, 209-
Two O font rubber rings, the 3rd O font rubber ring of 210-, 211- tie down screw, 212- locking nut, 3- pressure transmission bolt, 4- pressure transmission
Frame, 401- upper beam, 402- power transmission pull rod, 403- lower beam, 5- force transferring lever, 6- low stress charging assembly, 601-
Low stress counterweight hanging scaffold, 7- high stress charging assembly, 701- high stress counterweight hanging scaffold, 8- head test suite, 801- head pipe,
The first water pipe of 802-, the second water pipe of 803-, 804- head graduated scale panel, 805- triple valve, 806- pore pressure gauge,
807- two-port valve, 9- displacement dial gauge, 10- first axle, 11- leveling component, 1101- regulating box, 1102- adjusting handle,
1103- adjusting screw rod, 1104- adjust sleeve, and 1105- balances screw rod, 1106- counterweight, and 1107- is linked up with, 12- second hinge,
13- level, 14- third hinge, a- soil sample, b- fulcrum force.
Specific embodiment
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make detailed
Carefully it is described as follows.
As shown in Fig. 1 ~ 4, a kind of one-dimensional compression-infiltration experiment system of low stress starting, including testing stand 1, the test
The top of platform 1 is provided with consolidation container 2, and the top of the consolidation container 2 is provided with pressure transmission bolt 3, and the pressure transmission bolt 3 is through passing
Press box frame 4 is connected with force transferring lever 5, is provided with low stress charging assembly 6 and high stress charging assembly on the force transferring lever 5
7, the lower part of the consolidation container 2 is provided with head test suite 8.
In embodiments of the present invention, the consolidation container 2 includes that the chassis 201, first of sequence setting from top to bottom is permeable
Stone 202, cutting ring 203, the second permeable stone 204 and sample cap 205 are contained with soil sample in the cutting ring 203, and described first is permeable
Stone 202 is placed in inside the center groove on chassis 201, and the lateral wall of the cutting ring 203 is arranged with the first retaining collar 206, described
First retaining collar 206 is placed on the outer ring surface on chassis 201, and is provided between first retaining collar 206 and chassis 201
One O font rubber ring 207, the lateral wall of second permeable stone 204 are arranged with the second retaining collar 208, and described second is fixed
Lantern ring 208 is placed on the first retaining collar 206, and is provided between second retaining collar 208 and the first retaining collar 206
Two O font rubber rings 209, the upper outside wall of the cutting ring 203 are arranged with the 3rd O font rubber ring 210, the 3rd O word
Type rubber ring 210 is arranged between cutting ring 203 and the first retaining collar 206；The sample cap 205 is organic using existing lightweight
Glass is made.
In embodiments of the present invention, several tie down screws are equipped between the chassis 201 and the second retaining collar 208
211, several circumferentially spaced-apart settings of the tie down screw 211, one end of the tie down screw 211 is threadedly coupled with chassis 201,
The other end of the tie down screw 211 is locked after passing through the second retaining collar 208 using locking nut 212；Preferably, the lock
The quantity of tight screw rod 211 is three, and the present invention realizes institute by three tie down screws 211, the confining pressure of locking nut 212
The 3rd O font rubber ring 210 is stated to set to sealing function, realization the first O between cutting ring 203 and the first retaining collar 206
Font rubber ring 207 is set to sealing function, realization the 2nd O font rubber between chassis 201 and the first retaining collar 206
Circle 209 is set to the sealing function between the second retaining collar 208 and third retaining collar, realizes 2 bottom of consolidation container
Water can only be by getting to 2 top of consolidation container inside 203 soil sample of cutting ring.
In embodiments of the present invention, when the original state of soil sample is the plastic state soil body, using the edge of a knife of the cutting ring 203
The slow insertion soil body vertically downward, during pushing for avoid soil sample cracking need to by 203 outer wall of cutting ring more than the soil body by
Step is rejected, and finally scabbles the extra soil body in 203 top and the bottom of cutting ring, and the filter paper after degassed water saturation is affixed on soil sample or more
Two surfaces；The first permeable stone 202 after degassed water saturation is put at the center groove on chassis 201, and on the chassis
201 outer ring surface places the first O font rubber ring 207；Upper 3rd O font rubber is bound round on the top for cutting the excellent cutting ring 203
After cushion rubber 210, first retaining collar 206 in the outer cover of the cutting ring 203；Second is consolidated by three tie down screws 211
Determine lantern ring 208 to connect with chassis 201, and locked using the locking nut 212, makes the first O font rubber ring between any two
207, the 2nd O font rubber ring 209, the 3rd O font rubber ring 210, which are pressurized, plays sealing function；It successively puts at the top of soil sample
Second permeable stone 204 and sample cap 205；The outer ring surface on the chassis 201 is provided with to place the first O font rubber ring 207
The first groove, the lower surface of second retaining collar 208 be provided with to place the 2nd O font rubber ring 209 second
Groove, the medial surface of first retaining collar 206 are provided with the third groove to place the 3rd O font rubber ring 210；Institute
The top for stating the first retaining collar 206 is provided with bump to connect with the lower part of the second retaining collar 208.
It in embodiments of the present invention, first will be after degassed water saturation when the original state of soil sample is the liquid-plastic state soil body
The first permeable stone 202 be put at the center groove on chassis 201, and the outer ring surface on the chassis 201 place the first O font rubber
Cushion rubber 207；After upper 3rd O font rubber ring 210 is bound round on the top of the cutting ring 203, the in the outer cover of the cutting ring 203
One retaining collar 206；Fluidised form remoulded sample is poured slowly into after mixing evenly in cutting ring 203, the process of pouring into can be with above and below iron wire
It mentions slotting mud and excludes bubble in mud, soil sample upper face is struck off after filling；By three tie down screws 211 by the second retaining collar
208 connect with chassis 201, and are locked using the locking nut 212, make the first O font rubber ring between component two-by-two
207, the 2nd O font rubber ring 209, the 3rd O font rubber ring 210, which are pressurized, plays sealing function；24 hours are placed to guarantee stream
Excess pore pressure dissipation in state remoulded sample.
In embodiments of the present invention, the head test suite 8 includes head pipe 801, the first water pipe 802 and the second water
Pipe, the head pipe 801 are disposed longitudinally on the side of consolidation container, and first water pipe 802 is horizontally installed on the second water pipe
The two sides of consolidation container, the upper end of the head pipe 801 are provided with head graduated scale panel 804, under the head pipe 801
The first-class road junction through triple valve 805, second road junction is held to access one end of the first water pipe 802, the third of the triple valve 805
Runner mouth is connected with pore pressure gauge 806, and the other end of first water pipe 802 is permeable with first behind chassis 201
Stone 202 is connected, and one end of second water pipe is connected with the first permeable stone 202, the other end setting of second water pipe
There is two-port valve 807；The head graduated scale panel 804 can require to connect in the pulley on wall by nail according to head height
It is gone up and down.
In embodiments of the present invention, the top of the pressure transmission bolt 3 is provided with displacement dial gauge 9, the pressure transmission bolt 3
Bottom is pressed in the top groove of sample cap 205, and the pressure transmission frame 4 includes upper beam 401 interconnected, power transmission pull rod
402 and lower beam 403, the middle part of the pressure transmission bolt 3 be connected through screw thread with upper beam 401, the lower beam
403 are connected through first axle 10 with force transferring lever 5；Soil sample height change is measured by the reading of the displacement dial gauge 9；Institute
It states first axle 10 and uses diamond shape edge of a knife pin, the adjustable upper and lower position relative to crossbeam 401 of pressure transmission bolt 3；Institute
It states consolidation container 2 to be placed between two power transmission pull rods 402, the upper beam 401, two power transmission pull rods 402 and lower laterals
The pressure transmission frame 4 of the formation hollow of beam 403；The displacement dial gauge 9 is connected through stand with testing stand 1.
In embodiments of the present invention, the low stress charging assembly 6 includes low stress counterweight hanging scaffold 601, the low stress
Counterweight hanging scaffold 601 and power transmission pull rod 402 are located at same vertical guide, and the high stress charging assembly 7 includes high stress counterweight hanging scaffold
701, the side end of force transferring lever 5 is arranged in the high stress counterweight hanging scaffold 701；Pass through the low stress counterweight hanging scaffold 601
On counterweight load be transmitted to sample cap 205 by the transfer mode of 1:1；Sample cap 205 act on soil sample load be 0.5 ~
12.5kPa；It is transmitted to sample cap 205 by the transfer mode of 12:1 by the counterweight load on the high stress counterweight hanging scaffold 701,
The load that sample cap 205 acts on soil sample is 25 ~ 1600kPa.
In embodiments of the present invention, the other side end of the force transferring lever 5 is provided with leveling component 11, the leveling group
Part 11 includes the regulating box 1101 that the lower part of testing stand 1 is arranged in, and the regulating box 1101 is internally provided with bevel gear pair, group
It is connected at the first bevel gear of the bevel gear pair with the adjusting handle 1102 being laterally arranged, forms the of the bevel gear pair
Two bevel gears are connected with longitudinally disposed adjusting screw rod 1103, and the adjusting bolt external screw thread, which is connected with, adjusts rod piece 1104,
The adjusting rod piece 1104 is connected through second hinge 12 with the fulcrum force of force transferring lever 5, horizontal on the adjusting rod piece 1104
It is connect to through third hinge 14 with balance screw rod 1105, the left end of the balance screw rod 1105 is threaded with counterweight 1106；
The right end of the balance screw rod 1105 is connected by hook 1107 with 403 center of lower beam of pressure transmission frame 4, described
Second hinge 12 uses diamond shape edge of a knife pin；Third hinge 14 uses rotational pin；Rotate the adjusting handle 1102, described first
Bevel gear transfers second bevel gear and rotates, so that the adjustings bolt be driven to rotate, due to the force transferring lever 5 and
The limitation of second hinge 12 adjusts rod piece 1104 and rotates, so as to adjust the adjusting bolt and adjust the phase between rod piece 1104
It adjusts the distance, while adjusting the position of the counterweight 1106, so that the force transferring lever 5 is sent out around second hinge 12
Raw rotation, so as to adjust balance of the force transferring lever 5 in the case where zero load；Certainly, the leveling component 11 can be with
Directly adopt the leveling component in existing simple lever consolidation apparatus.
In embodiments of the present invention, the side end of the force transferring lever 5 is provided with level 13, and the level 13 is auxiliary
Help the balance for adjusting force transferring lever 5 in the case where zero load.
In embodiments of the present invention, a kind of low stress originates the working method of one-dimensional compression-infiltration experiment system, including upper
It states low stress described in any one and originates one-dimensional compression-infiltration experiment system comprising the steps of: group is loaded by low stress
Part 6, force transferring lever 5, consolidation container carry out low stress load to soil sample, pass through high stress charging assembly 7, force transferring lever 5, consolidation
Container carries out high stress load to soil sample, and utilized head test suite 8 can measure the infiltration coefficient of different stress level soil samples
With pore water pressure.
In embodiments of the present invention, the second permeable stone 204 and sample cap 205 are successively put at the top of soil sample, and in sample cap
205 top fixed displacement dial gauges 9 adjust the leveling component 11, keep the bubble of the level 13 in an intermediate position, benefit
Balance of the force transferring lever 5 in the case where zero load is adjusted with leveling component 11；
Low stress bootstrap process: it when required load is less than 12.5kPa and is greater than 0.5kPa, is hung in the low stress counterweight
Counterweight is placed on disk 601, counterweight weight transfers the load to sample cap 205 by the transfer mode of 1:1；Soil sample bears sample at this time
The vertical consolidation pressure of 0.5kPa ~ 12.5kPa of cap 20 5 reads the deformation in soil sample consolidation process by displacement dial gauge 9
Data；
High stress bootstrap process: when required load is greater than 12.5kPa, by the high stress counterweight hanging scaffold 701
Counterweight is placed, counterweight weight transfers the load to sample cap by the transfer mode of 12:1, and soil sample bears the 25 of sample cap 205 at this time
The vertical consolidation pressure of ~ 1600kPa reads the deformation data in soil sample consolidation process by displacement dial gauge 9.
In embodiments of the present invention, pore pressure test process measures pore water pressure: opening the two-port valve 807, then will
The triple valve 805 is connected with head pipe 801, and the triple valve 805 is isolated with pore pressure gauge 806 at this time, to institute
The water outlet of two-port valve 807 is stated, and forms solid stream of water, illustrates that sample bottom residual air drains；Then by triple valve 805 and hole
Water pressure gauge 806 is connected, and the triple valve 805 is isolated with head pipe 801 at this time, closes two-port valve 807, and loading procedure is read
Take pore water pressure numerical value.
In embodiments of the present invention, permeability test process measurement infiltration coefficient: when soil body compressive deformation is steady under every grade of load
After fixed, pore water pressure drops to zero, the triple valve 805 is connected to head pipe 801, at this time the triple valve 805 and hole
Gap water pressure gauge 806 is isolated, and closes two-port valve 807, and the head pressure of head pipe 801, which cannot be greater than, to be applied at the top of soil sample
Vertical load, and initial head height is selected according to the permeability of soil sample, reached just by going up and down head graduated scale panel 804
The requirement of beginning head height reads head height later and changes with time, obtains the infiltration coefficient under current state of soil.
For indicating that the term of positional relationship or shape removes applied in any technical solution disclosed in aforementioned present invention
Its otherwise indicated outer meaning includes approximate with its, similar or close state or shape.
Either component provided by the invention by multiple individual component parts either assembled, or one
The separate part that forming technology manufactures.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；Although referring to preferred embodiment pair
The present invention is described in detail, it should be understood by those ordinary skilled in the art that: still can be to of the invention specific
Embodiment is modified or some technical features can be equivalently replaced；Without departing from the spirit of the technical scheme of the invention,
It should all cover within the scope of the technical scheme claimed by the invention.
Claims (7)
1. a kind of low stress originates one-dimensional compression-infiltration experiment system, it is characterised in that: including testing stand, the testing stand
Top is provided with consolidation container, and the top of the consolidation container is provided with pressure transmission bolt, the pressure transmission bolt through pressure transmission frame with
Force transferring lever is connected, and low stress charging assembly and high stress charging assembly are provided on the force transferring lever, and the consolidation is held
The lower part of device is provided with head test suite.
2. low stress according to claim 1 originates one-dimensional compression-infiltration experiment system, it is characterised in that: the consolidation
Container includes chassis, the first permeable stone, cutting ring, the second permeable stone and the sample cap of sequence setting from top to bottom, the cutting ring
It is inside contained with soil sample, first permeable stone is placed in inside the center groove on chassis, and the lateral wall of the cutting ring is arranged with first
Retaining collar, first retaining collar are placed on the outer ring surface on chassis, are provided between first retaining collar and chassis
First O font rubber ring, the lateral wall of second permeable stone are arranged with the second retaining collar, and second retaining collar is placed in
On first retaining collar, the 2nd O font rubber ring, the ring are provided between second retaining collar and the first retaining collar
The upper outside wall of knife is arranged with the 3rd O font rubber ring, and the 3rd O font rubber ring is arranged in cutting ring and the first fixing sleeve
Between ring.
3. low stress according to claim 2 originates one-dimensional compression-infiltration experiment system, it is characterised in that: the chassis
Several tie down screws, several circumferentially spaced-apart settings of tie down screw, the lock are equipped between the second retaining collar
One end of tight screw rod is threadedly coupled with chassis, and the other end of the tie down screw utilizes locking nut after passing through the second retaining collar
Locking.
4. low stress according to claim 2 originates one-dimensional compression-infiltration experiment system, it is characterised in that: the head
Test suite includes head pipe, the first water pipe and the second water pipe, and the head pipe is disposed longitudinally on the side of consolidation container, institute
It states the first water pipe and the second water pipe is horizontally installed on the two sides of consolidation container, the upper end of the head pipe is provided with head graduated scale
Ruler panel, the lower end of the head pipe accesses one end of the first water pipe through the first-class road junction of triple valve, second road junction, described
The third flow channel mouth of triple valve is connected with pore pressure gauge, and the other end of first water pipe is saturating with first behind chassis
Water stone is connected, and one end of second water pipe is connected with the first permeable stone, and the other end of second water pipe is provided with two
Port valve.
5. low stress according to claim 2 originates one-dimensional compression-infiltration experiment system, it is characterised in that: the pressure transmission
Displacement dial gauge is provided at the top of bolt, the bottom of the pressure transmission bolt is pressed in the top groove of sample cap, the pressure transmission
Frame includes upper beam interconnected, power transmission pull rod and lower beam, the middle part of the pressure transmission bolt through screw thread with it is upper
Portion's crossbeam is connected, and the lower beam is connected through first axle with force transferring lever.
6. low stress according to claim 5 originates one-dimensional compression-infiltration experiment system, it is characterised in that: described low to answer
Power charging assembly includes low stress counterweight hanging scaffold, and the underface of power transmission pull rod, the height is arranged in the low stress counterweight hanging scaffold
Stress loading component includes high stress counterweight hanging scaffold, and the side end of force transferring lever is arranged in the high stress counterweight hanging scaffold.
7. the working method that a kind of low stress originates one-dimensional compression-infiltration experiment system, which is characterized in that including such as claim
Low stress described in 1 ~ 6 any one originates one-dimensional compression-infiltration experiment system comprising the steps of: is loaded by low stress
Component, force transferring lever, consolidation container carry out low stress load to soil sample, are held by high stress charging assembly, force transferring lever, consolidation
Device carries out high stress load to soil sample, and utilized head test suite can measure infiltration coefficient and the hole of different stress level soil samples
Gap water pressure.
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| CN115979880A (en) * | 2022-11-25 | 2023-04-18 | 中国矿业大学 | Device and method for testing near-surface soil water retention curve in low-stress environment |
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| CN115979880A (en) * | 2022-11-25 | 2023-04-18 | 中国矿业大学 | Device and method for testing near-surface soil water retention curve in low-stress environment |
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| CN109030315B (en) | 2020-11-27 |
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