CN106092849A - A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method - Google Patents
A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method Download PDFInfo
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- CN106092849A CN106092849A CN201610365907.7A CN201610365907A CN106092849A CN 106092849 A CN106092849 A CN 106092849A CN 201610365907 A CN201610365907 A CN 201610365907A CN 106092849 A CN106092849 A CN 106092849A
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- 238000000034 method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000002184 metal Substances 0.000 claims abstract description 54
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 239000002689 soil Substances 0.000 claims abstract description 50
- 238000002474 experimental method Methods 0.000 claims abstract description 46
- 230000035699 permeability Effects 0.000 claims description 10
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000008595 infiltration Effects 0.000 description 9
- 238000001764 infiltration Methods 0.000 description 9
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- Life Sciences & Earth Sciences (AREA)
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- Dispersion Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention open a kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method, device includes testing cylinder, feed pipe and pressue device, experiment cylinder inner bottom surface is provided with base support, the top of base support is provided with lower metal plate hole, the upper surface of lower metal plate hole is provided with lower filter screen, filling test soil sample on lower filter screen, the end face of test soil sample is provided with upper filter screen, and the upper surface of upper filter screen is provided with metal plate hole.Sidewall connection below the lower metal plate hole of experiment cylinder connects overflow pipe, and the sidewall between lower metal plate hole and the upper metal plate hole of experiment cylinder is connected pressure-measuring pipe, and sidewall the connection more than upper metal plate hole of experiment cylinder connects water inlet pipe.Being fixedly installed servo water pump and water pressure gauge in pressue device, pressue device is connected with feed pipe.Servo water pump can simulate high hydraulic condition, measures the critical pressure that sandy gravel is gushed under high hydraulic condition.This apparatus structure is simple, workable, has stronger directive significance for practice of construction.
Description
Technical field
The present invention relates to geotechnical testament apparatus technical field, be specifically related to a kind of sand-pebble layer earth pressure balanced shield, EPBS
Driving anti-gush experimental provision and method.
Background technology
Under high hydraulic condition, sand-pebble layer uses earth pressure balanced shield, EPBS driving, owing to sandy gravel infiltration coefficient is big, and water
Head pressure is big, needs interpolation additive to carry out sediment improvement and reduces its infiltration coefficient, to ensure shield machine internal screw conveyer not
Gushing, it is ensured that support pressure, but how improve dregs effect, its infiltration coefficient reduces how much can prevent from less gushing to be sent out
Raw, when hydraulic pressure is much, improvement sandy gravel will appear from gushing, and there is presently no preferable method and assay device is tested.And
Improvement sandy gravel is all by certain Water And Earth Pressures in balancing earth-pressure shielding machine Tu Cang and conveying worm, and its infiltration coefficient is with often
Difference during pressure condition, conventional infiltration experiment device cannot carry out pressure test infiltration coefficient to soil sample, need to be to improvement sandy gravel
Anti-test method of gushing improves with device and innovates.
Accordingly, it is desirable to provide a kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method, this dress
Having installed permeability apparatus with pressure, soil sample can be pressurizeed by this permeability apparatus, the infiltration under different Water And Earth Pressures of the test soil sample
Coefficient, and by pressure water injection, test soil sample produces the critical pressure gushed.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of anti-experiment of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving
Apparatus and method, by the sandy gravel of improvement is put into experiment cylinder, carry out the constant head permeability test under atmospheric pressure state and not
With the constant head permeability test under soil pressure, and gush destruction by simulating high hydraulic pressure test sandy gravel test soil sample
Critical pressure.
For solving above-mentioned technical problem, the present invention uses following technical proposals:
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving, including experiment cylinder, feed pipe and pressurization
Device, described experiment cylinder inner bottom surface is provided with base support, and the top of base support is provided with lower metal plate hole, described lower metallic plate
The upper surface in hole is provided with lower filter screen, filling test soil sample on described lower filter screen, and the end face of described test soil sample is provided with upper filter screen, institute
The upper surface stating upper filter screen is provided with metal plate hole.
Sidewall connection below the lower metal plate hole of described experiment cylinder connects overflow pipe, the lower metal plate hole of described experiment cylinder
It is connected the first pressure-measuring pipe, the second pressure-measuring pipe and the 3rd pressure measurement with being sequentially communicated from bottom to top on the sidewall between upper metal plate hole
Pipe, sidewall the connection more than upper metal plate hole of described experiment cylinder connects water inlet pipe.
Being fixedly installed servo water pump and water pressure gauge in described pressue device, described pressue device is connected with feed pipe.Servo
Water pump can simulate high hydraulic condition, measures the critical pressure that improvement sandy gravel is gushed under high hydraulic condition.
Preferably, this device also includes increased pressure beam, jack and axle power meter, and described increased pressure beam is located at experiment cylinder
Top, the base of described jack is fixedly installed on the lower surface of increased pressure beam, the push rod of described jack and upper metal plate hole
Upper surface, described axle power meter is fixedly installed on increased pressure beam.Increased pressure beam can be executed for test soil sample by jack
Adding soil pressure, upper metal plate hole is placed in test soil sample, water penetration can be made to go out, can test actual work while applying pressure
Sandy gravel infiltration coefficient under different soil pressures in screw machine in journey.
Preferably, described feed pipe is fixedly installed water check valve.Water check valve can control water supply and the closedown of feed pipe.
Preferably, the sidewall of described experiment cylinder is fixedly installed graduated tile, described graduated tile and the first pressure-measuring pipe, the second survey
Pressure pipe is corresponding with the position of the 3rd pressure-measuring pipe.Graduated tile can show the first pressure-measuring pipe, the second pressure-measuring pipe and the 3rd pressure-measuring pipe
Interior height of water level.
Preferably, this device also includes that sliding support and graduated cylinder, described overflow pipe ride upon on sliding support, described spilling water
Pipe is connected with graduated cylinder.Graduated cylinder can directly display the volume of the water infiltrated.
Preferably, the diameter ratio experiment cylinder of metal plate hole, upper filter screen and lower filter screen under described base support, upper metal plate hole
The little 0.5cm of internal diameter.
Described upper metal plate hole is consistent with the aperture of lower metal plate hole.
Utilize the experimental technique of the anti-experimental provision of gushing of above-mentioned a kind of sand-pebble layer earth pressure balanced shield, EPBS driving, this experiment
Method comprises the following steps:
A, base support, lower metal plate hole, lower filter screen being sequentially placed in experiment cylinder, layering loads test soil sample, every layer
10cm, connects feed pipe and water inlet pipe, opens water check valve, after making test soil sample the most saturated, is again loaded into testing soil sample, until
Last layer of test soil sample exceeds the 3rd piezometric level 10cm, and test soil sample top is sequentially placed upper filter screen and upper metallic plate
Hole, continues to be filled with water to overflow pipe have water to overflow when the water surface exceeds test soil sample, close water check valve, and standing is to the 3rd piezometric level
When flushing with experiment cylinder, carry out the constant head permeability test under atmospheric pressure state；
B, startup jack, make the push rod of jack that upper metal plate hole to apply downward pressure, and the measurement examination of axle power applies
The size of pressure, carries out the constant head permeability test under different soil pressure；
C, by the first pressure-measuring pipe, the second pressure-measuring pipe and the 3rd pressure-measuring pipe close, servo water pump is connected with overflow pipe, pressurize
To experiment cylinder in test soil sample top have water to gush, water pressure gauge record test soil sample gush destruction water pressure.
Beneficial effects of the present invention is as follows:
A kind of sand-pebble layer earth pressure balanced shield, EPBS driving of the present invention is anti-gushs experimental provision and method owing to have employed
Above technical scheme, increased pressure beam can apply soil pressure by jack for test soil sample, and upper metal plate hole is placed in test soil sample
On, can apply while pressure, make water penetration go out, sandy gravel can tested in Practical Project in screw machine under different soil pressures
Infiltration coefficient.Servo water pump can simulate high hydraulic condition, and what mensuration improvement sandy gravel was gushed under high hydraulic condition faces
Boundary's water pressure.This apparatus structure is simple, workable, has stronger directive significance for practice of construction.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Fig. 1 illustrates the anti-experimental provision band pressue device of gushing of a kind of sand-pebble layer earth pressure balanced shield, EPBS driving of the present invention
Structural representation.
Fig. 2 illustrates the anti-experimental provision band jack of gushing of a kind of sand-pebble layer earth pressure balanced shield, EPBS driving of the present invention
Structural representation.
Description of reference numerals: 1 experiment cylinder, 2 water, 3 pressue devices, 4 sliding supports, 5 graduated cylinders, 6 increased pressure beams, 7 bases prop up
Frame, metal perforated plate on 8,9 times metal perforated plates, 10 upper filter screens, 11 lower filter screens, 12 overflow pipes, 13 first pressure-measuring pipes, 14 second pressure measurement
Pipe, 15 the 3rd pressure-measuring pipes, 16 graduated tiles, 17 water inlet pipes, 18 feed pipes, 19 water check valves, 20 jack, 21 axle power meters, 22 servos
Water pump, 23 water pressure gauges, 24 test soil samples
Detailed description of the invention
In order to be illustrated more clearly that the present invention, below in conjunction with preferred embodiments and drawings, the present invention is done further
Bright.Parts similar in accompanying drawing are indicated with identical reference.It will be appreciated by those skilled in the art that institute is concrete below
The content described is illustrative and be not restrictive, and should not limit the scope of the invention with this.
As Figure 1-Figure 2, a kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving, including experiment cylinder
1, feed pipe 18 and pressue device 3, described experiment cylinder 1 inner bottom surface is provided with base support 7, and the top of base support 7 is provided with down
Metal plate hole 9, the upper surface of described lower metal plate hole 9 is provided with lower filter screen 11, filling test soil sample 24 on described lower filter screen 11, institute
The end face stating test soil sample 24 is provided with upper filter screen 10, and the upper surface of described upper filter screen 10 is provided with metal plate hole 8.Described experiment cylinder
The sidewall connection of the lower metal plate hole less than 9 of 1 connects overflow pipe 12, lower metal plate hole 9 and the upper metal plate hole of described experiment cylinder 1
Connection the first pressure-measuring pipe the 13, second pressure-measuring pipe 14 and the 3rd pressure-measuring pipe 15 it is sequentially communicated from bottom to top on sidewall between 8, described
It is fixedly installed graduated tile 16, described graduated tile 16 and first pressure-measuring pipe the 13, second pressure-measuring pipe 14 and the 3rd on the sidewall of experiment cylinder 1
The position of pressure-measuring pipe 15 is corresponding.The sidewall connection of the upper metal plate hole more than 8 of described experiment cylinder 1 connects water inlet pipe 17.Described
Being fixedly installed servo water pump 22 and water pressure gauge 23 in pressue device 3, described pressue device 3 is connected with feed pipe 18, described water supply
Water check valve 19 it is fixedly installed on pipe 18.
This device also includes increased pressure beam 6, jack 20 and axle power meter 21, and described increased pressure beam 6 is located at experiment cylinder 1
Top, the base of described jack 20 is fixedly installed on the lower surface of increased pressure beam 6, the push rod of described jack 20 and upper metal
The upper surface of plate hole 8, described axle power meter 21 is fixedly installed on increased pressure beam 6.
This device also includes that sliding support 4 and graduated cylinder 5, described overflow pipe 12 ride upon on sliding support 4, described overflow pipe
12 are connected with graduated cylinder 5.
The diameter of described base support 7,8 times metal plate holes 9 of upper metal plate hole, upper filter screen 10 and lower filter screen 11 is than experiment cylinder
The little 0.5cm of internal diameter of 1.
Described upper metal plate hole 8 is consistent with the aperture of lower metal plate hole 9.
Utilize the experimental technique of the anti-experimental provision of gushing of above-mentioned a kind of sand-pebble layer earth pressure balanced shield, EPBS driving, this experiment
Method comprises the following steps:
A, base support 7, lower metal plate hole 9, lower filter screen 11 being sequentially placed in experiment cylinder 1, layering loads test soil sample
24, every layer of 10cm, connect feed pipe 18 and water inlet pipe 17, open water check valve 19, after making test soil sample 24 the most saturated, again fill
Entering to test soil sample 24, until last layer of test soil sample 24 exceeds the 3rd pressure-measuring pipe 15 water level 10cm, test soil sample 24 top depends on
Secondary placement upper filter screen 10 and upper metal plate hole 8, continue to be filled with water to overflow pipe 12 have when the water surface elevation of water 2 exceed test soil sample 24
Water 2 overflows, and closes water check valve 19, stand to the 3rd pressure-measuring pipe 15 water level with test cylinder 1 flush time, carry out under atmospheric pressure state is normal
Head permeability is tested；
B, startup jack 20, make the push rod of jack 20 that upper metal plate hole 8 to apply downward pressure, and axle power meter 21 is surveyed
Stressed size is executed in examination, carries out the constant head permeability test under different soil pressure；
C, first pressure-measuring pipe the 13, second pressure-measuring pipe 14 and the 3rd pressure-measuring pipe 15 are closed, by servo water pump 22 and overflow pipe
12 connect, and test soil sample 24 top being forced in experiment cylinder 1 has water to gush, and water pressure gauge 22 records test soil sample 24 and gushs
The water pressure destroyed.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, the most also may be used
To make other changes in different forms, cannot all of embodiment be given exhaustive here, every belong to this
What bright technical scheme was amplified out obviously changes or changes the row still in protection scope of the present invention.
Claims (8)
1. the anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving, it is characterised in that: include testing cylinder (1),
Feed pipe (18) and pressue device (3), described experiment cylinder (1) inner bottom surface is provided with base support (7), the top of base support (7)
Portion is provided with lower metal plate hole (9), and the upper surface of described lower metal plate hole (9) is provided with lower filter screen (11), on described lower filter screen (11)
Filling test soil sample (24), the end face of described test soil sample (24) is provided with upper filter screen (10), the upper surface of described upper filter screen (10)
It is provided with metal plate hole (8)；
The sidewall connection below of the lower metal plate hole (9) of described experiment cylinder (1) connects overflow pipe (12), described experiment cylinder (1)
Be sequentially communicated from bottom to top on sidewall between lower metal plate hole (9) with upper metal plate hole (8) be connected the first pressure-measuring pipe (13),
Two pressure-measuring pipes (14) and the 3rd pressure-measuring pipe (15), the sidewall more than upper metal plate hole (8) of described experiment cylinder (1) connect into
Water pipe (17)；
Servo water pump (22) and water pressure gauge (23), described pressue device (3) and feed pipe it is fixedly installed in described pressue device (3)
(18) connect.
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving the most according to claim 1, its feature
Being: this device also includes increased pressure beam (6), jack (20) and axle power meter (21), described increased pressure beam (6) is located at experiment
The top of cylinder (1), the base of described jack (20) is fixedly installed on the lower surface of increased pressure beam (6), described jack (20)
The upper surface of push rod and upper metal plate hole (8), described axle power meter (21) is fixedly installed on increased pressure beam (6).
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving the most according to claim 1, its feature
It is: on described feed pipe (18), be fixedly installed water check valve (19).
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving the most according to claim 1, its feature
It is: on the sidewall of described experiment cylinder (1), be fixedly installed graduated tile (16), described graduated tile (16) and the first pressure-measuring pipe (13),
Second pressure-measuring pipe (14) is corresponding with the position of the 3rd pressure-measuring pipe (15).
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving the most according to claim 1, its feature
Being: this device also includes sliding support (4) and graduated cylinder (5), described overflow pipe (12) rides upon on sliding support (4), described
Overflow pipe (12) is connected with graduated cylinder (5).
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving the most according to claim 1, its feature
It is: described base support (7), upper metal plate hole (8), lower metal plate hole (9), upper filter screen (10) and the diameter of lower filter screen (11)
The little 0.5cm of internal diameter than experiment cylinder (1).
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving the most according to claim 1, its feature
It is: described upper metal plate hole (8) is consistent with the aperture of lower metal plate hole (9).
8. utilize the anti-reality of gushing of the driving of a kind of sand-pebble layer earth pressure balanced shield, EPBS described in claim 1-7 any claim
The experimental technique of experiment device, it is characterised in that: this experimental technique comprises the following steps:
A, base support (7), lower metal plate hole (9), lower filter screen (11) being sequentially placed in experiment cylinder (1), layering loads test
Soil sample (24), every layer of 10cm, connect feed pipe (18) and water inlet pipe (17), open water check valve (19), make test soil sample (24) by
After the most saturated, it is again loaded into testing soil sample (24), until last layer test soil sample (24) exceeds the 3rd pressure-measuring pipe (15) 10cm,
Test soil sample (24) top is sequentially placed upper filter screen (10) and upper metal plate hole (8), continues when the water surface exceeds test soil sample (24)
Being filled with water to overflow pipe (12) has water to overflow, and closes water check valve (19), stands to the 3rd pressure-measuring pipe (15) water level neat with experiment cylinder (1)
At ordinary times, the constant head permeability test under atmospheric pressure state is carried out；
B, startup jack (20), make the push rod of jack (20) that upper metal plate hole (8) is applied downward pressure, axle power meter
(21) stressed size is executed in test, carries out the constant head permeability test under different soil pressure；
C, by the first pressure-measuring pipe (13), the second pressure-measuring pipe (14) and the 3rd pressure-measuring pipe (15) close, by servo water pump (22) with overflow
Water pipe (12) connects, and test soil sample (24) top being forced in experiment cylinder (1) has water to gush, and water pressure gauge (22) records test soil
Sample (24) gush destroy water pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610365907.7A CN106092849B (en) | 2016-05-27 | 2016-05-27 | A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method |
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| CN201610365907.7A CN106092849B (en) | 2016-05-27 | 2016-05-27 | A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method |
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| CN106092849B CN106092849B (en) | 2019-02-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769787A (en) * | 2017-02-17 | 2017-05-31 | 宿州学院 | A kind of multimedium infiltration experiment device and its method of testing |
| CN106918536A (en) * | 2017-02-24 | 2017-07-04 | 同济大学 | The measure device and method of the vertical effective diffusion cofficient of solute in a kind of saturation soil layer |
| CN108061698A (en) * | 2017-12-11 | 2018-05-22 | 叶剑红 | The full-automatic experimental rig and its method of measurement fluctuation current infiltration towing force coefficient |
| CN108169459A (en) * | 2018-01-11 | 2018-06-15 | 河海大学 | EPB shield tunneling pressure chamber-spiral dumper is gushed laboratory apparatus and its experimental method |
| CN109060526A (en) * | 2018-07-05 | 2018-12-21 | 沈阳工业大学 | Thief zone sand-pebble layer earth pressure balanced shield, EPBS consolidates permeability experimental facility and method |
| CN110658120A (en) * | 2018-06-28 | 2020-01-07 | 中南大学 | Method and device for testing permeability coefficient of foam-improved sandy residue soil under high water pressure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769787A (en) * | 2017-02-17 | 2017-05-31 | 宿州学院 | A kind of multimedium infiltration experiment device and its method of testing |
| CN106918536A (en) * | 2017-02-24 | 2017-07-04 | 同济大学 | The measure device and method of the vertical effective diffusion cofficient of solute in a kind of saturation soil layer |
| CN108061698A (en) * | 2017-12-11 | 2018-05-22 | 叶剑红 | The full-automatic experimental rig and its method of measurement fluctuation current infiltration towing force coefficient |
| CN108169459A (en) * | 2018-01-11 | 2018-06-15 | 河海大学 | EPB shield tunneling pressure chamber-spiral dumper is gushed laboratory apparatus and its experimental method |
| CN110658120A (en) * | 2018-06-28 | 2020-01-07 | 中南大学 | Method and device for testing permeability coefficient of foam-improved sandy residue soil under high water pressure |
| CN110658120B (en) * | 2018-06-28 | 2021-04-16 | 中南大学 | Method and device for testing permeability coefficient of foam-improved sandy residue soil under high water pressure |
| CN109060526A (en) * | 2018-07-05 | 2018-12-21 | 沈阳工业大学 | Thief zone sand-pebble layer earth pressure balanced shield, EPBS consolidates permeability experimental facility and method |
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