CN106092849B - 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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- CN106092849B CN106092849B CN201610365907.7A CN201610365907A CN106092849B CN 106092849 B CN106092849 B CN 106092849B CN 201610365907 A CN201610365907 A CN 201610365907A CN 106092849 B CN106092849 B CN 106092849B
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- 238000000034 method Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000012360 testing method Methods 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 56
- 239000002689 soil Substances 0.000 claims abstract description 50
- 238000002474 experimental method Methods 0.000 claims abstract description 45
- 230000035699 permeability Effects 0.000 claims description 9
- 230000006378 damage Effects 0.000 claims description 4
- 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 description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 230000008595 infiltration Effects 0.000 description 9
- 238000001764 infiltration Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 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
- 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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- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- 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 discloses a kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method, device includes experiment cylinder, water supplying pipe and pressurizing device, it tests cylinder inner bottom surface and is equipped with base support, the top of base support is equipped with lower metal plate hole, the upper surface of lower metal plate hole is equipped with lower filter screen, filling test soil sample on lower filter screen, the top surface for testing soil sample are equipped with upper filter screen, and the upper surface of upper filter screen is equipped with upper metal plate hole.The lower metal plate hole side wall connection connection overflow pipe below for testing cylinder, tests and is connected to connection pressure-measuring pipe on the side wall between the lower metal plate hole of cylinder and upper metal plate hole, tests the side wall connection connection water inlet pipe of the upper metal plate hole of cylinder or more.Fixed setting servo water pump and water pressure gauge, pressurizing device are connect with water supplying pipe in pressurizing device.The high hydraulic condition of servo water pump analog, the critical pressure that measurement sandy gravel is gushed under high hydraulic condition.The apparatus structure is simple, strong operability, has stronger directive significance for practice of construction.
Description
Technical field
The present invention relates to geotechnical testament apparatus technical fields, and in particular to a kind of sand-pebble layer earth pressure balanced shield, EPBS
Driving anti-gush experimental provision and method.
Background technique
Sand-pebble layer is tunneled using earth pressure balanced shield, EPBS under high hydraulic condition, since sandy gravel infiltration coefficient is big, water
Head pressure is big, and needing to add additive progress sediment improvement reduces its infiltration coefficient, to guarantee shield machine internal screw conveyer not
It gushs, guarantees support pressure, but how improve dregs effect, how much infiltration coefficient can prevent hair of gushing less if reducing
Raw, when hydraulic pressure is much, improvement sandy gravel will gush, and there is presently no preferable methods and experimental rig to be tested.And
Sandy gravel is improved in balancing earth-pressure shielding machine Tu Cang and screw conveyor by certain Water And Earth Pressures, infiltration coefficient and often
Different when pressure condition, conventional infiltration experiment device can not carry out pressure test infiltration coefficient to soil sample, need to be to improvement sandy gravel
Anti- test method of gushing is improved and is innovated with device.
Accordingly, it is desirable to provide a kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method, the dress
Permeability apparatus with pressure is installed, which can pressurize to soil sample, test infiltration of the soil sample under different Water And Earth Pressures
Coefficient, and by pressure water injection, test soil sample generates 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-experiments of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving
Device and method carry out the constant head permeability test and not under normal pressure state by the way that the sandy gravel of improvement to be put into experiment cylinder
With the constant head permeability test under soil pressure, and soil sample is tested by simulating high hydraulic pressure test sandy gravel and is gushed destruction
Critical pressure.
In order to solve the above technical problems, the present invention adopts the following technical solutions:
A kind of anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving, including experiment cylinder, water supplying pipe and pressurization
Device, the experiment cylinder inner bottom surface are equipped with base support, and the top of base support is equipped with lower metal plate hole, the lower metal plate
The upper surface in hole is equipped with lower filter screen, and the top surface of filling test soil sample on the lower filter screen, the test soil sample is equipped with upper filter screen, institute
The upper surface for stating upper filter screen is equipped with upper metal plate hole.
The lower metal plate hole of experiment cylinder side wall connection connection overflow pipe below, the lower metal plate hole of the experiment cylinder
It is sequentially communicated from bottom to top on side wall between upper metal plate hole and connect the first pressure-measuring pipe, the second pressure-measuring pipe and third survey pressure
It manages, side wall connection connection the water inlet pipe more than upper metal plate hole of the experiment cylinder.
Fixed setting servo water pump and water pressure gauge, the pressurizing device are connect with water supplying pipe in the pressurizing device.Servo
The high hydraulic condition of water pump analog, the critical pressure that measurement improvement sandy gravel is gushed under high hydraulic condition.
Preferably, which further includes increased pressure beam, jack and axle power meter, and the increased pressure beam is located at experiment cylinder
Top, the pedestal of the jack are fixed at the lower surface of increased pressure beam, the mandril of the jack and upper metal plate hole
Upper surface contact, the axle power meter is fixed on increased pressure beam.Increased pressure beam can be that test soil sample is applied by jack
Add soil pressure, upper metal plate hole is placed in test soil sample, water penetration can be made to go out, can test practical work while applying pressure
Infiltration coefficient of the sandy gravel in screw machine under different soil pressures in journey.
Preferably, water check valve is fixedly installed on the water supplying pipe.Water check valve can control the water supply and closing of water supplying pipe.
Preferably, scale plate, the scale plate and the first pressure-measuring pipe, the second survey are fixedly installed on the side wall of the experiment cylinder
The position of pressure pipe and third pressure-measuring pipe is corresponding.Scale plate can show the first pressure-measuring pipe, the second pressure-measuring pipe and third pressure-measuring pipe
Interior height of water level.
Preferably, which further includes sliding support and graduated cylinder, and the overflow pipe rides upon on sliding support, the spilling water
Pipe is connected with graduated cylinder.Graduated cylinder can directly display the volume of the water infiltrated.
Preferably, the diameter ratio of metal plate hole, upper filter screen and lower filter screen tests cylinder under the base support, upper metal plate hole
The small 0.5cm of internal diameter.
The upper metal plate hole is consistent with the aperture of lower metal plate hole.
Utilize a kind of above-mentioned experimental method of the anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving, the experiment
Method the following steps are included:
A, base support, lower metal plate hole, lower filter screen being sequentially placed into experiment cylinder, layering, which is packed into, tests soil sample, and every layer
10cm connects water supplying pipe and water inlet pipe, opens water check valve, after being saturated test soil sample gradually, is again loaded into test soil sample, until
The last layer test soil sample is higher by third piezometric level 10cm, and test soil sample top is sequentially placed upper filter screen and upper metal plate
There is water spilling in hole when the water surface is higher by test soil sample and continues to be filled with water to overflow pipe, closes water check valve, stand to third piezometric level
When flushing with experiment cylinder, the constant head permeability test under normal pressure state is carried out；
B, start jack, the mandril of jack is made to apply downward pressure to upper metal plate hole, axle power measurement examination applies
The size of pressure carries out the constant head permeability test under different soil pressures；
C, the first pressure-measuring pipe, the second pressure-measuring pipe and third pressure-measuring pipe are closed, servo water pump is connect with overflow pipe, pressurizeed
There is water to gush at the top of test soil sample in experiment cylinder, water pressure gauge measures test soil sample and gushs the water pressure of destruction.
Beneficial effects of the present invention are as follows:
A kind of sand-pebble layer earth pressure balanced shield, EPBS driving of the invention is anti-to gush experimental provision and method due to using
Above technical scheme, increased pressure beam can be that test soil sample applies soil pressure by jack, and upper metal plate hole is placed in test soil sample
On, water penetration can be made to go out while applying pressure, sandy gravel can be tested in Practical Project in screw machine under different soil pressures
Infiltration coefficient.The high hydraulic condition of servo water pump analog, what measurement improvement sandy gravel was gushed under high hydraulic condition faces
Boundary's water pressure.The apparatus structure is simple, strong operability, has stronger directive significance for practice of construction.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows a kind of anti-experimental provision band pressurizing device of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving of the invention
Structural schematic diagram.
Fig. 2 shows a kind of sand-pebble layer earth pressure balanced shield, EPBS of the invention drivings to prevent gushing experimental provision with jack
Structural schematic diagram.
Description of symbols: 1 experiment cylinder, 2 water, 3 pressurizing devices, 4 sliding supports, 5 graduated cylinders, 6 increased pressure beams, 7 pedestal branch
Frame, metal perforated plate on 8,9 lower metal perforated plates, 10 upper filter screens, 11 lower filter screens, 12 overflow pipes, 13 first pressure-measuring pipes, 14 second survey pressure
Pipe, 15 third pressure-measuring pipes, 16 scale plates, 17 water inlet pipes, 18 water supplying pipes, 19 water check valves, 20 jack, 21 axle power meters, 22 servos
Water pump, 23 water pressure gauges, 24 test soil samples
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited 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, water supplying pipe 18 and pressurizing device 3,1 inner bottom surface of experiment cylinder are equipped with base support 7, and the top of base support 7 is equipped with down
Metal plate hole 9, the upper surface of the lower metal plate hole 9 are equipped with lower filter screen 11, filling test soil sample 24 on the lower filter screen 11, institute
The top surface for stating test soil sample 24 is equipped with upper filter screen 10, and the upper surface of the upper filter screen 10 is equipped with upper metal plate hole 8.The experiment cylinder
1 side wall below of lower metal plate hole 9 connection connection overflow pipe 12, the lower metal plate hole 9 and upper metal plate hole of the experiment cylinder 1
The first pressure-measuring pipe 13 of connection, the second pressure-measuring pipe 14 and third pressure-measuring pipe 15 are sequentially communicated on side wall between 8 from bottom to top, it is described
It tests and scale plate 16, the scale plate 16 and the first pressure-measuring pipe 13, the second pressure-measuring pipe 14 and third is fixedly installed on the side wall of cylinder 1
The position of pressure-measuring pipe 15 is corresponding.The side wall connection connection water inlet pipe 17 of 8 or more the upper metal plate hole of the experiment cylinder 1.It is described
Fixed setting servo water pump 22 and water pressure gauge 23, the pressurizing device 3 are connect with water supplying pipe 18 in pressurizing device 3, the water supply
Water check valve 19 is fixedly installed on pipe 18.
The device further includes increased pressure beam 6, jack 20 and axle power meter 21, and the increased pressure beam 6 is located at experiment cylinder 1
Top, the pedestal of the jack 20 are fixed at the lower surface of increased pressure beam 6, the mandril and upper metal of the jack 20
The upper surface of plate hole 8 contacts, and the axle power meter 21 is fixed on increased pressure beam 6.
The device further includes sliding support 4 and graduated cylinder 5, and the overflow pipe 12 rides upon on sliding support 4, the overflow pipe
12 are connected with graduated cylinder 5.
The diameter of the base support 7, upper metal plate hole 8 lower metal plate hole 9, upper filter screen 10 and lower filter screen 11 is than experiment cylinder
The small 0.5cm of 1 internal diameter.
The upper metal plate hole 8 is consistent with the aperture of lower metal plate hole 9.
Utilize a kind of above-mentioned experimental method of the anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving, the experiment
Method the following steps are included:
A, base support 7, lower metal plate hole 9, lower filter screen 11 are sequentially placed into experiment cylinder 1, layering is packed into test soil sample
24, every layer of 10cm connect water supplying pipe 18 and water inlet pipe 17, open water check valve 19, after being saturated test soil sample 24 gradually, fill again
Enter to test soil sample 24, until the last layer test soil sample 24 is higher by 15 water level 10cm of third pressure-measuring pipe, test 24 top of soil sample according to
Secondary placement upper filter screen 10 and upper metal plate hole 8 have when the water surface elevation of water 2 is higher by test soil sample 24 and continues to be filled with water to overflow pipe 12
Water 2 overflows, and closes water check valve 19, when standing to 15 water level of third pressure-measuring pipe is flushed with experiment cylinder 1, carries out normal under normal pressure state
Head permeability experiment；
B, start jack 20, the mandril of jack 20 is made to apply downward pressure to upper metal plate hole 8, axle power meter 21 is surveyed
Stressed size is applied in examination, carries out the constant head permeability test under different soil pressures；
C, the first pressure-measuring pipe 13, the second pressure-measuring pipe 14 and third pressure-measuring pipe 15 are closed, by servo water pump 22 and overflow pipe
12 connections, being forced at the top of the test soil sample 24 tested in cylinder 1 has water to gush, and water pressure gauge 23 measures test soil sample 24 and gushs
The water pressure of destruction.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
Bright technical solution changes and variations that derived from are still in the scope of protection of the present invention.
Claims (5)
1. a kind of experimental method for tunneling anti-experimental provision of gushing using sand-pebble layer earth pressure balanced shield, EPBS, it is characterised in that:
The anti-experimental provision of gushing of sand-pebble layer earth pressure balanced shield, EPBS driving includes experiment cylinder (1), water supplying pipe (18) and pressurizing device
(3), experiment cylinder (1) inner bottom surface is equipped with base support (7), and the top of base support (7) is equipped with lower metal plate hole (9),
The upper surface of the lower metal plate hole (9) is equipped with lower filter screen (11), filling test soil sample (24) on the lower filter screen (11), described
The top surface for testing soil sample (24) is equipped with upper filter screen (10), and the upper surface of the upper filter screen (10) is equipped with upper metal plate hole (8)；
The lower metal plate hole (9) of experiment cylinder (1) side wall connection connection overflow pipe (12) below, experiment cylinder (1)
It is sequentially communicated from bottom to top on side wall between lower metal plate hole (9) and upper metal plate hole (8) and connect the first pressure-measuring pipe (13),
Two pressure-measuring pipes (14) and third pressure-measuring pipe (15), it is described experiment cylinder (1) upper metal plate hole (8) more than side wall connect into
Water pipe (17)；
Fixed setting servo water pump (22) and water pressure gauge (23), the pressurizing device (3) and water supplying pipe in the pressurizing device (3)
(18) it connects；
The device further includes increased pressure beam (6), jack (20) and axle power meter (21), and the increased pressure beam (6) is located at experiment
The top of cylinder (1), the pedestal of the jack (20) are fixed at the lower surface of increased pressure beam (6), the jack (20)
Mandril contacted with the upper surface of upper metal plate hole (8), the axle power meter (21) is fixed on increased pressure beam (6)；
Water check valve (19) are fixedly installed on the water supplying pipe (18)；
Experimental method the following steps are included:
A, base support (7), lower metal plate hole (9), lower filter screen (11) are sequentially placed into experiment cylinder (1), layering is packed into test
Soil sample (24), every layer of 10cm, connection water supplying pipe (18) and water inlet pipe (17) are opened water check valve (19), make test soil sample (24) by
After being gradually saturated, it is again loaded into test soil sample (24), until the last layer test soil sample (24) is higher by third 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 is higher by test soil sample (24)
Being filled with water to overflow pipe (12) has water spilling, closes water check valve (19), stands neat to third pressure-measuring pipe (15) water level and experiment cylinder (1)
Usually, the constant head permeability test under normal pressure state is carried out；
B, start jack (20), the mandril of jack (20) is made to apply downward pressure, axle power meter to upper metal plate hole (8)
(21) stressed size is applied in test, carries out the constant head permeability test under different soil pressures；
C, the first pressure-measuring pipe (13), the second pressure-measuring pipe (14) and third pressure-measuring pipe (15) are closed, by servo water pump (22) and is overflow
Water pipe (12) connection, test soil sample (24) top being forced into experiment cylinder (1) have water to gush, and water pressure gauge (23) measures test soil
Sample (24) is gushed the water pressure of destruction.
2. experimental method according to claim 1, it is characterised in that: be fixedly installed and carve on the side wall of experiment cylinder (1)
It spends plate (16), the position of the scale plate (16) and the first pressure-measuring pipe (13), the second pressure-measuring pipe (14) and third pressure-measuring pipe (15)
It is corresponding.
3. experimental method according to claim 1, it is characterised in that: the device further includes sliding support (4) and graduated cylinder
(5), the overflow pipe (12) rides upon on sliding support (4), and the overflow pipe (12) is connected with graduated cylinder (5).
4. experimental method according to claim 1, it is characterised in that: the base support (7), upper metal plate hole (8), under
The diameter of metal plate hole (9), upper filter screen (10) and lower filter screen (11) is 0.5cm smaller than the internal diameter for testing cylinder (1).
5. experimental method according to claim 1, it is characterised in that: the upper metal plate hole (8) and lower metal plate hole (9)
Aperture it is consistent.
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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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| 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 true CN106092849B (en) | 2019-02-05 |
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| 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 |
| 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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