CN104481549B - Bentonite injection method and system for blocking gushing water and sand - Google Patents
Bentonite injection method and system for blocking gushing water and sand Download PDFInfo
- Publication number
- CN104481549B CN104481549B CN201410658969.8A CN201410658969A CN104481549B CN 104481549 B CN104481549 B CN 104481549B CN 201410658969 A CN201410658969 A CN 201410658969A CN 104481549 B CN104481549 B CN 104481549B
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- Prior art keywords
- bentonite
- shield
- injection
- sand
- decanting point
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- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 85
- 239000000440 bentonite Substances 0.000 title claims abstract description 85
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000004576 sand Substances 0.000 title claims abstract description 33
- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000000903 blocking effect Effects 0.000 title claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 239000006260 foam Substances 0.000 claims abstract description 5
- 230000005641 tunneling Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 18
- 230000014759 maintenance of location Effects 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000002689 soil Substances 0.000 claims description 14
- 238000005187 foaming Methods 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000001141 propulsive effect Effects 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Provided is a bentonite injection method and system for blocking gushing water and sand and applied to the technical field of earth pressure balance shield machines. The bentonite slurry is pumped from a first bentonite tank on a rear supporting vehicle to injection points around a shield body of a shield machine through a first quantitative centrifugal pump, the injection points of the shield body are circumferentially and uniformly arranged to provide sufficient and effective propulsion for the tunneling of the shield machine, the bentonite slurry liquid is switched to a foam system by being switched to the same injection opening of a rotary connector and a foam injection system through a control valve to for achieving the independent injection of the bentonite to the outside of a tool plate and completing muck improvement, and the bentonite slurry in an excavation chamber is pumped to a muck vehicle through a second quantitative centrifugal pump. The bentonite injection method and system for blocking gushing water and sand effectively solves the problem that a pressure balance is difficult to establish in the excavation chamber when the shield machine works on a sandy gravel stratum containing abundant moisture so as to effectively avoid road collapse, endangering the personal safety and damaging equipment.
Description
Technical field
The present invention relates to one of balancing earth-pressure shielding machine technical field is used for blocking the bentonite injection that retention of excessive fluid gushes sand
Method and system.
Background technology
At present, when balancing earth-pressure shielding machine meets with sand-pebble layer, aqueous abundant, and permeability of aquifer is stronger, excavates
It is difficult to set up earth pressure balance in storehouse, when at this moment easily causing conveying worm casting, retention of excessive fluid gushes the generation of husky event, and causes
Road surface subsides, or even work the mischief personal safety and the damage of equipment.Run into rich in water sand cobble in balancing earth-pressure shielding machine
During stratum, easily cause the accident of gushing, a kind of bentonite method for implanting gushing sand for blocking retention of excessive fluid that we develop not only can
Lubrication shield body, reduces the frictional resistance between shield body and sand, and can effectively block the generation that retention of excessive fluid gushes husky event.Cause
This, development is a kind of, and for blocking, retention of excessive fluid gushes the bentonite method for implanting of sand and system is always new problem anxious to be resolved.
Content of the invention
It is an object of the invention to provide a kind of bentonite method for implanting and system gushing sand for blocking retention of excessive fluid, for richness
Aqueous sand-pebble layer, shield machine excavates when being difficult to set up earth pressure balance in storehouse, injects bentonite slurry around shield body, stops
Subsoil water and fine sand collect and form even surface collapse construction accident of gushing, and inject bentonite slurry in anterior shield pressure-bearing dividing plate,
Some centimetres of injection stratum, the gap between embedded cobble is mixed with forming mud film, plays sealing and pressure maintaining effect.
The object of the present invention is achieved like this：A kind of bentonite method for implanting gushing sand for blocking retention of excessive fluid, with shield
Structure machine moves ahead, need to by bentonite slurry, the first bentonite tank from rear matching vehicle is pumped to shield machine with the first quantitative centrifugal pump
At decanting point around shield body, the volume of the first bentonite tank is 3m3, and the decanting point in shield body is usually the uniform cloth of circumferencial direction
Put, such bentonite slurry is mixed with surrounding soil, form thin mud film around shield body, shield body not only can be lubricated, reduce shield
Frictional resistance between body and sand, tunneling for shield machine provides more sufficient effective propulsive force, and the thin mud film of formation can hinder
Only subsoil water and fine sand collect, and play the effect of sealing, block water and blowout enters in front of shield machine；Another of bentonite system
Branch road is the serosity being stirred the second bentonite tank on rear matching vehicle, is pumped into anterior shield pressure-bearing dividing plate with frequency conversion screw
Decanting point and the decanting point of foaming system switching, the volume of the second bentonite tank is 7m3；Swelling in the injection of anterior shield pressure-bearing dividing plate
Soil paste liquid, can be deep with some centimetres of injection stratum, and the gap between embedded cobble is mixed with forming mud film, plays sealing and pressurize
Effect；The bentonite slurry being switched to foaming system is to be switched at swivel joint with foam injection systems altogether by control valve
Use identical inlet, realize the independent injection bentonite to outside cutterhead, completing sediment improvement, if meeting with aqueous big stratum, opening
Dig the bentonite slurry in storehouse and become sposh shape, it is possible to use the second quantitative centrifugal pump is mixed excavating the bentonite slurry in storehouse with water
Compound is retracted on slag-soil truck；A kind of described injected system gushing husky bentonite method for implanting for blocking retention of excessive fluid, including
Decanting point around first bentonite tank, the first quantitative centrifugal pump, shield body, the second bentonite tank, frequency conversion screw pump, anterior shield pressure-bearing
The decanting point of dividing plate, the decanting point of foaming system switching, the second quantitative centrifugal pump, the first bentonite tank connects via valve, reducing
Head and play the expansion joint of adjusting position to the first quantitative centrifugal pump, then by the first quantitative expanded section of centrifugal pump, reducer union,
The decanting point to around shield body for the valve, according to the needs of physical location, each connector adopts hard tube or hose connection；Second swelling
Native tank via valve, reducer union and expansion joint to frequency conversion screw pump, then by the expanded section of frequency conversion screw pump, 2 reducer unions,
Flow transducer, pressure transducer, valve and check valve are to the decanting point of anterior shield pressure-bearing dividing plate, or the note to foaming system switching
Access point, each connector adopts hard tube or hose connection；If meeting with aqueous big stratum, the bentonite slurry excavating in storehouse becomes sposh
Shape, via valve and expansion joint to the second quantitative centrifugal pump, then being connected in slag-soil truck by expansion joint, hard tube and flexible pipe；Institute
A kind of bentonite method for implanting gushing sand for blocking retention of excessive fluid stated, its operation principle is, rich in water sand pebble layer, shield
Machine excavates when being difficult to set up earth pressure balance in storehouse, and the decanting point around shield body injects bentonite mud with the first quantitative centrifugal pump
Slurry, stops subsoil water and fine sand from collecting and form even surface collapse construction accident of gushing；With frequency conversion screw pump by bentonite mud
Slurry is injected into the decanting point of anterior shield pressure-bearing dividing plate, some centimetres of injection stratum, and the gap between embedded cobble is mixed with forming mud
Film, plays sealing and pressure maintaining effect, will excavate unnecessary bentonite slurry and aqueous mixtures in storehouse using the second quantitative centrifugal pump
It is retracted on slag-soil truck.
The present invention is characterized by its method for implanting and system.Its operation principle is, rich in water sand pebble layer, shield
Structure machine excavates when being difficult to set up earth pressure balance in storehouse, and the decanting point around shield body injects bentonite mud with the first quantitative centrifugal pump
Slurry, stops subsoil water and fine sand from collecting and form even surface collapse construction accident of gushing；With frequency conversion screw pump by bentonite mud
Slurry is injected into the decanting point of anterior shield pressure-bearing dividing plate, some centimetres of injection stratum, and the gap between embedded cobble is mixed with forming mud
Film, plays sealing and pressure maintaining effect, will excavate unnecessary bentonite slurry and aqueous mixtures in storehouse using the second quantitative centrifugal pump
It is retracted on slag-soil truck.
A kind of for block retention of excessive fluid gush sand bentonite method for implanting and system compared with prior art, have and effectively solve
Certainly shield machine meets with sand-pebble layer, aqueous abundant, and permeability of aquifer is stronger, excavates in storehouse and is difficult to set up earth pressure balance,
When easily causing conveying worm casting, retention of excessive fluid gushes the generation of husky event, is prevented effectively from road surface and subsides, in addition harm personal safety with
And equipment damage the advantages of, will be widely used in balancing earth-pressure shielding machine technical field.
Brief description
Below in conjunction with the accompanying drawings and embodiment the present invention is described in detail.
Fig. 1 is the systematic schematic diagram of the present invention.
Specific embodiment
Referring to the drawings, a kind of bentonite method for implanting gushing sand for blocking retention of excessive fluid, with shield going-forward, need to be with first
Quantitative centrifugal pump 2（Power 18.5kW）First bentonite tank 1 from rear matching vehicle for the bentonite slurry is pumped to shield machine shield
At decanting point 3 around body, the volume of the first bentonite tank 1 is 3m3, and it is uniform that the decanting point 3 in shield body is usually circumferencial direction
Arrangement, such bentonite slurry is mixed with surrounding soil, forms thin mud film around shield body, not only can lubricate shield body, reduces
Frictional resistance between shield body and sand, tunneling for shield machine provides more sufficient effective propulsive force, and the thin mud film of formation is permissible
Stop subsoil water and fine sand from collecting, play the effect of sealing, block water and blowout enters in front of shield machine；Bentonite system another
Bar branch road is the serosity being stirred the second bentonite tank 4 on rear matching vehicle, with frequency conversion screw pump 5（Power 22kW）It is transported to
The decanting point 6 of anterior shield pressure-bearing dividing plate and the decanting point 7 of foaming system switching, the volume of the second bentonite tank 4 is 7m3；In anterior shield
The bentonite slurry of pressure-bearing dividing plate injection, can be deep with some centimetres of injection stratum, and the gap between embedded cobble is mixed with being formed
Mud film, plays sealing and pressure maintaining effect；The bentonite slurry being switched to foaming system is to switch over rotation by control valve to connect
Share identical inlet with foam injection systems at head, realize the independent injection bentonite to outside cutterhead, complete sediment improvement, such as
Fruit meets with aqueous big stratum, and the bentonite slurry excavating in storehouse becomes sposh shape, it is possible to use the second quantitative centrifugal pump 8（Power
5.5kW）The bentonite slurry excavating in storehouse is retracted on slag-soil truck with aqueous mixtures.
A kind of described injected system gushing husky bentonite method for implanting for blocking retention of excessive fluid, including the first bentonite tank
1（Volume is 3m3）, the first quantitative centrifugal pump 2（Power 18.5kW）, the decanting point 3 around shield body, the second bentonite tank 4（Volume
For 7m3）, frequency conversion screw pump 5（Power 22kW）, anterior shield pressure-bearing dividing plate decanting point 6, foaming system switching decanting point 7, second
Quantitative centrifugal pump 8（Power 5.5kW）, the first bentonite tank 1（Volume is 3m3）Via valve, reducer union and an adjusting position
Expansion joint is to the first quantitative centrifugal pump 2（Power 18.5kW）, then by the first quantitative expanded section of centrifugal pump 2, reducer union,
The decanting point 3 to around shield body for the valve, according to the needs of physical location, each connector adopts hard tube or hose connection；Second is swollen
Profit native tank 4（Volume is 7m3）Via valve, reducer union and expansion joint to frequency conversion screw pump 5（Power 22kW）, then by frequency conversion spiral shell
The expanded section of bar pump 5,2 reducer unions, flow transducer, pressure transducer, valve and check valve are to anterior shield pressure-bearing dividing plate
Decanting point 6, or the decanting point 7 to foaming system switching, each connector adopts hard tube or hose connection；If meeting with aqueous the earth
Layer, the bentonite slurry excavating in storehouse becomes sposh shape, via valve and expansion joint to the second quantitative centrifugal pump 8（Power 5.5kW）,
Being connected in slag-soil truck by expansion joint, hard tube and flexible pipe again.
A kind of described bentonite method for implanting gushing sand for blocking retention of excessive fluid, its operation principle is, rich in water sand ovum
Stone stratum, shield machine excavates in storehouse when being difficult to set up earth pressure balance, the first quantitation centrifugal pump 2 of the decanting point 3 around shield body
（Power 18.5kW）Injection bentonite slurry, stops subsoil water and fine sand from collecting and form even surface collapse construction thing of gushing
Therefore；With frequency conversion screw pump 5（Power 22kW）Bentonite slurry is injected into the decanting point 6 of anterior shield pressure-bearing dividing plate, if injection stratum
Dry centimetre, the gap between embedded cobble is mixed with forming mud film, plays sealing and pressure maintaining effect, using the second quantitative centrifugal pump
8（Power 5.5kW）The unnecessary bentonite slurry excavating in storehouse is retracted on slag-soil truck with aqueous mixtures.
Claims (2)
1. a kind of for block retention of excessive fluid gush sand bentonite method for implanting it is characterised in that：With shield going-forward, need to be with first
By bentonite slurry, the first bentonite tank from rear matching vehicle is pumped to the decanting point around shield machine shield body to quantitative centrifugal pump
Place, the volume of the first bentonite tank is 3m3, usually circumferencial direction is evenly arranged the decanting point in shield body, such bentonite slurry
Liquid is mixed with surrounding soil, forms thin mud film around shield body, not only can lubricate shield body, reduces rubbing between shield body and sand
Wipe resistance, tunneling for shield machine provides more sufficient effective propulsive force, the thin mud film of formation can stop subsoil water and fine sand from converging
Collection, plays the effect of sealing, blocks water and blowout enters in front of shield machine；Another branch road of bentonite system is by rear matching vehicle
On the serosity that is stirred of the second bentonite tank, be pumped into decanting point and the foaming system of anterior shield pressure-bearing dividing plate with frequency conversion screw
The decanting point of switching, the volume of the second bentonite tank is 7m3；On the bentonite slurry of anterior shield pressure-bearing dividing plate injection, injection stratum
Some centimetres deep, and the gap between embedded cobble is mixed with forming mud film, plays sealing and pressure maintaining effect；It is switched to foaming system
Bentonite slurry be by control valve switch at swivel joint with foam injection systems share identical inlet, realize
To outside cutterhead, independent injection bentonite, completes sediment improvement, if meeting with aqueous big stratum, the bentonite slurry excavating in storehouse becomes
The bentonite slurry excavating in storehouse is retracted on slag-soil truck with aqueous mixtures by sposh shape using the second quantitative centrifugal pump；Described
A kind of for blocking the injected system that retention of excessive fluid gushes the bentonite method for implanting of sand, include the first bentonite tank, first quantitatively from
Decanting point around heart pump, shield body, the second bentonite tank, frequency conversion screw pump, the decanting point of anterior shield pressure-bearing dividing plate, foaming system are cut
The decanting point that changes, the second quantitative centrifugal pump, the first bentonite tank is via valve, reducer union and the expansion joint playing adjusting position
To the first quantitative centrifugal pump, then by the decanting point around the first quantitative expanded section of centrifugal pump, reducer union, valve to shield body,
According to the needs of physical location, each connector adopts hard tube or hose connection；Second bentonite tank via valve, reducer union and
Expansion joint to frequency conversion screw pump, then by the expanded section of frequency conversion screw pump, 2 reducer unions, flow transducer, pressure transducer,
Valve and check valve are to the decanting point of anterior shield pressure-bearing dividing plate, or the decanting point to foaming system switching, and each connector adopts hard tube
Or it is hose connection；If meeting with aqueous big stratum, the bentonite slurry excavating in storehouse becomes sposh shape, arrives via valve and expansion joint
Second quantitative centrifugal pump, then being connected in slag-soil truck by expansion joint, hard tube and flexible pipe.
2. according to claim 1 a kind of for block retention of excessive fluid gush sand bentonite method for implanting it is characterised in that：Its work
It is that, rich in water sand pebble layer, shield machine excavates when being difficult to set up earth pressure balance in storehouse, the injection around shield body as principle
Point, with the first quantitative centrifugal pump injection bentonite slurry, stops subsoil water and fine sand from collecting and form even surface collapse of gushing and apply
Fortification event；With frequency conversion screw pump, bentonite slurry is injected into the decanting point of anterior shield pressure-bearing dividing plate, some centimetres of injection stratum, embedding
Enter the gap between cobble to be mixed with forming mud film, play sealing and pressure maintaining effect, storehouse will be excavated using the second quantitative centrifugal pump
Interior unnecessary bentonite slurry and aqueous mixtures are retracted on slag-soil truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658969.8A CN104481549B (en) | 2014-11-19 | 2014-11-19 | Bentonite injection method and system for blocking gushing water and sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658969.8A CN104481549B (en) | 2014-11-19 | 2014-11-19 | Bentonite injection method and system for blocking gushing water and sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104481549A CN104481549A (en) | 2015-04-01 |
| CN104481549B true CN104481549B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410658969.8A Active CN104481549B (en) | 2014-11-19 | 2014-11-19 | Bentonite injection method and system for blocking gushing water and sand |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593456A (en) * | 2016-12-08 | 2017-04-26 | 中铁十四局集团隧道工程有限公司 | Method for setting shield tunneling machine free in water-rich sand cobble stratum due to stuck cutter |
| CN108343441A (en) * | 2017-12-21 | 2018-07-31 | 北方重工装备（沈阳）有限公司 | A kind of auxiliary pressurize method for balancing earth-pressure shielding machine |
| CN109026040A (en) * | 2018-08-03 | 2018-12-18 | 中国电建集团铁路建设有限公司 | A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS |
| CN110656656A (en) * | 2019-10-21 | 2020-01-07 | 吉林大学 | Fast and efficient blocking material for groundwater pollution and its application method |
| CN113153321B (en) * | 2021-03-30 | 2023-03-14 | 中建八局轨道交通建设有限公司 | Muck improvement system for shield construction and construction method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191417A (en) * | 2007-12-21 | 2008-06-04 | 沈阳重型机械集团有限责任公司 | Bentonite mud water pressurization equilibration shield machine |
| CN101210494A (en) * | 2007-12-24 | 2008-07-02 | 沈阳重型机械集团有限责任公司 | Gas cushion type mud water pressurization equilibration shield machine |
| CN101539023B (en) * | 2008-03-21 | 2012-07-04 | 中铁二局股份有限公司 | Shield machine belt pressure chamber opening operation construction method |
| CN101298837A (en) * | 2008-06-23 | 2008-11-05 | 沈阳重型机械集团有限责任公司 | Apparatus for reducing friction resistance between shield machine shield body and tunneling wall |
| CN103603670B (en) * | 2013-11-21 | 2019-03-05 | 上海市基础工程集团有限公司 | Ultra-deep earthing shield crossing bad ground construction method |
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