CN108035722A - Earth pressure balanced shield, EPBS high permeability sand modification method - Google Patents
Earth pressure balanced shield, EPBS high permeability sand modification method Download PDFInfo
- Publication number
- CN108035722A CN108035722A CN201711331938.1A CN201711331938A CN108035722A CN 108035722 A CN108035722 A CN 108035722A CN 201711331938 A CN201711331938 A CN 201711331938A CN 108035722 A CN108035722 A CN 108035722A
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- shield
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- earth pressure
- soil
- bentonite
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- 239000004576 sand Substances 0.000 title claims abstract description 22
- 230000035699 permeability Effects 0.000 title claims abstract description 20
- 238000002715 modification method Methods 0.000 title claims abstract description 12
- 239000002689 soil Substances 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 29
- 239000000440 bentonite Substances 0.000 claims abstract description 29
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 29
- 230000006872 improvement Effects 0.000 claims abstract description 26
- 229920000642 polymer Polymers 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 239000000243 solution Substances 0.000 claims abstract description 14
- 229920002521 macromolecule Polymers 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 230000008674 spewing Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 210000002966 serum Anatomy 0.000 claims description 5
- 230000008719 thickening Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 238000011049 filling Methods 0.000 abstract description 3
- 238000013019 agitation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000008961 swelling 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0678—Adding additives, e.g. chemical compositions, to the slurry or the cuttings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of earth pressure balanced shield, EPBS high permeability sand modification method, including soil improvement agent to prepare, and soil improvement agent application, the soil improvement agent is made of the raw material of volumes below amount：1）Bentonite slurry：System mixes viscosity after 24h：100s, 100 120 parts of bentonite, CMC（Chemical paste）5 parts, 1000 parts of water, 2）Macromolecule polymer solution：20 25 parts of high molecular polymer A300 crystal, 1000 parts of water.In construction, bentonite and high molecular polymer are each after wiring solution-forming, and bentonite independently injects Tu Cang by injected hole by the porous point injection Tu Cang of shield machine filling system, macromolecule polymer solution with pump, and modifying agent mixes and stirs in native storehouse under the agitation of cutterhead.Improve the mobility of dregs, establish earth pressure balance condition, stablize the unearthed smooth of screw machine, improve drivage efficiency.
Description
Technical field
The present invention relates to a kind of earth pressure balance shield construction method, especially a kind of strong permeability for soft soil foundation to be rich in
Earth pressure balance shield construction method during the saturated sand mobility of water is extremely strong.
Background technology
Earth pressure balanced shield, EPBS method is constructed, and excavation floor space is small, it is small that traffic and environment are influenced, and construction speed is stable, sets
Standby configuration and the factor such as easy to operate, in city, rail gives the field extensive use such as urban construction, engineering tunnel.
Earth pressure balanced shield, EPBS method is constructed, and excavation floor space is small, it is small that traffic and environment are influenced, and construction speed is stable, sets
Standby configuration and the factor such as easy to operate, in city, rail gives the field extensive use such as urban construction, engineering tunnel.But rich in water
Highly permeable saturated sand geology in construct, during screw machine casting mud extraction, quicksand spewing phenomenon easily occurs, causes hopper dredger soil pressure not
Balance, excavation face unstability.Screw machine is set to be difficult to continuously slag tap, unearthed amount is unable to control, and fltting speed fluctuation is big, cutterhead load
Weight, moment of torsion are high.Especially in southern region of China, such soil layer geology is very big to earth pressure balanced shield, EPBS construction infection than wide,
It is a great problem of earth pressure balanced shield, EPBS construction technology.
The content of the invention
The technical problem to be solved in the present invention is：A kind of earth pressure balanced shield, EPBS high permeability sand modification method is provided, it is right
The modification method of high permeability sand, improves the mobility of the soil body in earth pressure balanced shield, EPBS soil storehouse, when making screw machine casting mud extraction,
Quicksand spewing phenomenon does not occur, establishes earth pressure balance, it is ensured that the normal construction of shield.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：A kind of earth pressure balanced shield, EPBS high permeability sand changes
Good recipe method, including soil improvement agent are prepared, soil improvement agent application, and the soil improvement agent is prepared by the raw material of volumes below amount
Form：
1) bentonite slurry：System mixes viscosity after 24h：100s
100-120 parts of bentonite
5 parts of chemical paste
1000 parts of water
2) macromolecule polymer solution：
20-25 parts of high molecular polymer A300 crystal
1000 parts of water
Soil improvement agent is prepared：The saturation degree and water penetration of water sand soil are rich according to shield-tunneling construction soil layer, carries out modifying agent
The sample of solution concentration is prepared, and is tried out on the spot；During driving, it is unearthed no spewing phenomenon with screw machine spoil disposal, soil in hopper dredger
Flattening surely, can keep the earth pressure balance of shield-tunneling construction.
Soil improvement agent application：Bentonite slurry is mixed thoroughly with CMC mixed serums, is conveyed into shield machine bentonite injection system
System, injects hopper dredger by a side nozzle of hopper dredger plastron；Meanwhile 2.5% concentration high molecular polymer by it is special storage starch pumping system,
With another side nozzle of plastron injection hopper dredger, by cutterhead stirring rod in hopper dredger by soil improvement agent together with the dregs under cutting
Mix and stir, cohesive thickening, reach the mobility for alleviating high permeability sand, the spoil disposal of screw machine is unearthed into plasticity and show without gushing
As hopper dredger soil pressure is steady, keeps the earth pressure balance of shield-tunneling construction.
The beneficial effects of the invention are as follows：The earth pressure balanced shield, EPBS high permeability sand modification method of the present invention, in weak soil
In base, saturated sand mobility of the strong permeability rich in water is extremely strong, by the effect of modifying agent, improves the mobility of dregs, establishes
The pressure balance of Tu Cang, stablizes the unearthed smooth of screw machine.
Brief description of the drawings
Fig. 1 is the construction process schematic diagram of the earth pressure balanced shield, EPBS high permeability sand body modification method of the present invention.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the construction process schematic diagram of the earth pressure balanced shield, EPBS high permeability sand body modification method of the present invention,
Specific implementation step：Prepared including soil improvement agent, soil improvement agent application,
Soil improvement agent is formulated by the raw material of volumes below amount：
1) bentonite slurry：System mixes viscosity after 24h：100s
100-120 parts of bentonite
5 parts of CMC (chemical paste)
1000 parts of water
2) macromolecule polymer solution：
20-25 parts of high molecular polymer A300 crystal
1000 parts of water.
Earth pressure balanced shield, EPBS enters high permeability sand when constructing, and it is unstable hopper dredger soil pressure occur, screw machine be unearthed it is not smooth,
Or spewing phenomenon, soil improvement must be carried out with modifying agent.Sampled according to saturation degree of the construction soil layer rich in water sand soil with water penetration
The sample of modifying agent solution concentration is prepared, and is tried out on the spot.When reaching shield machine driving, the sandy soil of modifying agent is added in hopper dredger
Thickening is bonded, soil pressure is stablized, and screw machine spoil disposal is unearthed no spewing phenomenon, can keep the earth pressure balance of shield-tunneling construction, is formulated with this
Soil improvement agent processed.
It is prepared by soil improvement：Empirically it is formulated, mixes at the construction field (site) and bentonite is mixed with CMC, mixes thoroughly, ferment in stock tank
Slurrying is spare, in use, the bentonite slurry after directly ground system is mixed with pipeline is delivered to shield machine bentonite injected system
Slurry storing tube sets be pumped into hopper dredger on request；Empirically it is formulated, 2.5% concentration high molecular polymer special storage stock pump in shield machine
Send mixing solution for standby in system.By special storage slurry and pumping system by the flow instrument of human-computer interface automatic control system into
Row control in real time, use.
Soil improvement agent application：Bentonite and CMC mixed solutions are by shield machine muddy water filling system, with the one of hopper dredger plastron
Side nozzle injects hopper dredger；Meanwhile 2.5% concentration high molecular polymer by it is special storage starch pumping system, with another side nozzle of plastron
Hopper dredger is injected, soil improvement agent is mixed and stirred together with the dregs under cutting in hopper dredger by cutterhead stirring rod, bonds thickening, is reached
To the mobility for alleviating high permeability sand, the spoil disposal of screw machine is set to be unearthed into plasticity without spewing phenomenon, hopper dredger soil pressure is steady,
Keep the earth pressure balance of shield-tunneling construction.
Soil improvement agent application：Empirically it is formulated, bentonite is mixed thoroughly with CMC mixed serums, is conveyed into shield machine bentonite
Injected system is spare；Empirically it is formulated, 2.5% concentration high molecular polymer is separately made in shield machine in special storage slurry pumping system
Mixing solution for standby.The bentonite slurry of preparation is with macromolecule polymer solution using respective pumping system by man-machine automation
Control system is controlled in real time by flow instrument.By grouting pipeline, two kinds of slurries are pumped into shield soil storehouse respectively and mixes and stirs, make to cut
Dregs under cutting bonds thickening, alleviates its strong mobility, it is ensured that screw machine spoil disposal is unearthed no spewing phenomenon, and soil pressure is put down in hopper dredger
Surely, the earth pressure balance of shield-tunneling construction is kept.
It is simple to add high concentration bentonite slurry (i.e. bentonite slurry and CMC mixed serums) for topsoil, collapse to it
Degree of falling has good improving effect, but for saturated sand, since it contains a large amount of water, it is more tight that slurries are diluted situation
Weight, a large amount of bentonite clay particles are suspended in the liquid of supersaturated part, and sediment improvement influential effect is larger, in the mixing of low concentration
Under slurries, its slump is more difficult to meet the requirements.Simultaneously as the large-scale slurries mixing equipment of shield machine pumpability and scene
Limitation, can not merely using high concentration bentonite slurry when carrying out sediment improvement to saturation and the permeable middle Flooding in Borehole of supersaturation
Meet engineering demand.When polymer solution and high concentration bentonite slurry are used cooperatively, polymer can be by the swelling of the overwhelming majority
Native particulate and hydrone lock forms the dregs of similar clay character so that mixed serum improved effect can between gravel
Give full play to.EPB shield tunneling effectively accomplishes that side uses soil improvement in the severe stratum such as high permeability sand or rich water sand bed
Agent carries out sediment improvement, side tunneling construction.And prevent screw machine from gushing, reduce cutter head torque, reducing the parameter indexes such as gross thrust
Bring notable results, be allowed to normal tunneling construction.
Construction in the soft soil foundation high permeability sand that the present invention uses, the modification method of shield machine spoil disposal dregs, for solution
Certainly during shield-tunneling construction, screw machine is easily gushed, and support pressure is unbalance, fluctuates big control hardly possible, tunnels the situation of difficulty.Shield is dug
Into in construction, improved, that is, realized " earth pressure balance " in shield tunneling process with modifying agent for the easy mobility of dregs.
The match ratio (volume ratio) of modifying agent：Water (1)+bentonite (20%)+CMC (5 ‰)+2.5% concentration high molecular polymer
(3%).In construction, each after wiring solution-forming, bentonite is porous by shield machine filling system for bentonite and high molecular polymer
Point injection Tu Cang, macromolecule polymer solution independently inject Tu Cang by injected hole with pump, and modifying agent cutterhead in native storehouse stirs
Mixed and stirred under dynamic.Improve the mobility of dregs, establish earth pressure balance condition, stablize the unearthed smooth of screw machine, improve drivage efficiency.
Claims (3)
1. a kind of earth pressure balanced shield, EPBS high permeability sand modification method, including soil improvement agent are prepared, soil improvement agent application,
It is characterized in that：Soil improvement agent is formulated by the raw material of volumes below amount：
1）Bentonite slurry：System mixes viscosity after 24h：100s
100-120 parts of bentonite
5 parts of chemical paste
1000 parts of water
2）Macromolecule polymer solution：
20-25 parts of high molecular polymer A300 crystal
1000 parts of water.
2. earth pressure balanced shield, EPBS high permeability sand modification method according to claim 1, it is characterised in that：The soil body
Modifying agent is prepared：The saturation degree and water penetration of water sand soil are rich according to shield-tunneling construction soil layer, carries out the small of modifying agent solution concentration
Sample is prepared, and is tried out on the spot；During driving, it is unearthed no spewing phenomenon with screw machine spoil disposal, soil pressure is steady in hopper dredger, can keep
The earth pressure balance of shield-tunneling construction.
3. earth pressure balanced shield, EPBS high permeability sand modification method according to claim 1, it is characterised in that：The soil body
Modifying agent application：Bentonite slurry is mixed thoroughly with CMC mixed serums, shield machine bentonite injected system is conveyed into, by hopper dredger plastron
A side nozzle injection hopper dredger；Meanwhile 2.5% concentration high molecular polymer by it is special storage starch pumping system, with another side spray of plastron
Mouth injects hopper dredger, and soil improvement agent is mixed and stirred together with the dregs under cutting in hopper dredger by cutterhead stirring rod, bonds thickening,
Reach the mobility for alleviating high permeability sand, the spoil disposal of screw machine is unearthed into plasticity and put down without spewing phenomenon, hopper dredger soil pressure
Surely, the earth pressure balance of shield-tunneling construction is kept.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331938.1A CN108035722A (en) | 2017-12-11 | 2017-12-11 | Earth pressure balanced shield, EPBS high permeability sand modification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331938.1A CN108035722A (en) | 2017-12-11 | 2017-12-11 | Earth pressure balanced shield, EPBS high permeability sand modification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108035722A true CN108035722A (en) | 2018-05-15 |
Family
ID=62102853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711331938.1A Pending CN108035722A (en) | 2017-12-11 | 2017-12-11 | Earth pressure balanced shield, EPBS high permeability sand modification method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108035722A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577993A (en) * | 2018-12-06 | 2019-04-05 | 中交公局第三工程有限公司 | The determination method of the dense mud sediment improvement economical formula of sand-pebble layer EPB shield tunneling |
| CN110331986A (en) * | 2019-08-14 | 2019-10-15 | 江苏格睿特管网工程有限公司 | A kind of spoil disposal structure and engineering method for middle-size and small-size balancing earth-pressure shielding machine |
| CN112159165A (en) * | 2020-10-23 | 2021-01-01 | 中铁二十五局集团有限公司 | Shield freezing and opening material and preparation method thereof |
| CN113374485A (en) * | 2021-06-28 | 2021-09-10 | 中铁(上海)投资集团有限公司 | Shield grouting method based on shield muck improvement under water-rich sand layer condition |
| CN113482626A (en) * | 2021-07-08 | 2021-10-08 | 上海市基础工程集团有限公司 | Method for reinforcing soil body at entrance and exit of high-pressure-bearing underwater shield |
| CN113775345A (en) * | 2021-09-01 | 2021-12-10 | 浙江杭海城际铁路有限公司 | Method for improving full-section muck in silt layer in construction of connecting channel pipe jacking machine |
| CN114033406A (en) * | 2021-11-17 | 2022-02-11 | 中交天和机械设备制造有限公司 | Shield tunneling machine and method for improving large boulder sand gravel stratum muck by utilizing same |
| CN114456812A (en) * | 2022-01-07 | 2022-05-10 | 福州大学 | Method for preparing sandy soil muck modifier by using cohesive soil muck with granite residual soil, muck modifier and using method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577993A (en) * | 2018-12-06 | 2019-04-05 | 中交公局第三工程有限公司 | The determination method of the dense mud sediment improvement economical formula of sand-pebble layer EPB shield tunneling |
| CN110331986A (en) * | 2019-08-14 | 2019-10-15 | 江苏格睿特管网工程有限公司 | A kind of spoil disposal structure and engineering method for middle-size and small-size balancing earth-pressure shielding machine |
| CN110331986B (en) * | 2019-08-14 | 2020-02-14 | 江苏格睿特管网工程有限公司 | Mud discharging structure and construction method for small and medium-sized earth pressure balance shield machine |
| CN112159165A (en) * | 2020-10-23 | 2021-01-01 | 中铁二十五局集团有限公司 | Shield freezing and opening material and preparation method thereof |
| CN113374485A (en) * | 2021-06-28 | 2021-09-10 | 中铁(上海)投资集团有限公司 | Shield grouting method based on shield muck improvement under water-rich sand layer condition |
| CN113482626A (en) * | 2021-07-08 | 2021-10-08 | 上海市基础工程集团有限公司 | Method for reinforcing soil body at entrance and exit of high-pressure-bearing underwater shield |
| CN113775345A (en) * | 2021-09-01 | 2021-12-10 | 浙江杭海城际铁路有限公司 | Method for improving full-section muck in silt layer in construction of connecting channel pipe jacking machine |
| CN114033406A (en) * | 2021-11-17 | 2022-02-11 | 中交天和机械设备制造有限公司 | Shield tunneling machine and method for improving large boulder sand gravel stratum muck by utilizing same |
| CN114033406B (en) * | 2021-11-17 | 2024-01-23 | 中交天和机械设备制造有限公司 | Shield machine and method for improving slag soil of large-boulder sandy pebble stratum by using same |
| CN114456812A (en) * | 2022-01-07 | 2022-05-10 | 福州大学 | Method for preparing sandy soil muck modifier by using cohesive soil muck with granite residual soil, muck modifier and using method |
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Application publication date: 20180515 |