CN106522965A - Slurry for stabilizing shield excavated surface in marine stratum and construction method - Google Patents
Slurry for stabilizing shield excavated surface in marine stratum and construction method Download PDFInfo
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- CN106522965A CN106522965A CN201610953599.XA CN201610953599A CN106522965A CN 106522965 A CN106522965 A CN 106522965A CN 201610953599 A CN201610953599 A CN 201610953599A CN 106522965 A CN106522965 A CN 106522965A
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- mud
- sodium
- based bentonite
- face
- composite sodium
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 239000002002 slurry Substances 0.000 title abstract description 16
- 230000000087 stabilizing effect Effects 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 47
- 239000011734 sodium Substances 0.000 claims abstract description 47
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 47
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 46
- 239000000440 bentonite Substances 0.000 claims abstract description 46
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 45
- 239000000654 additive Substances 0.000 claims abstract description 13
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 229940092782 bentonite Drugs 0.000 claims description 41
- 238000009412 basement excavation Methods 0.000 claims description 38
- 230000005641 tunneling Effects 0.000 claims description 21
- 239000002689 soil Substances 0.000 claims description 16
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 13
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 12
- 229940080314 sodium bentonite Drugs 0.000 claims description 12
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 12
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 4
- VNSBYDPZHCQWNB-UHFFFAOYSA-N calcium;aluminum;dioxido(oxo)silane;sodium;hydrate Chemical compound O.[Na].[Al].[Ca+2].[O-][Si]([O-])=O VNSBYDPZHCQWNB-UHFFFAOYSA-N 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910000273 nontronite Inorganic materials 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims 2
- 239000013535 sea water Substances 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 6
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 235000006506 Brasenia schreberi Nutrition 0.000 abstract 1
- 244000267222 Brasenia schreberi Species 0.000 abstract 1
- 150000001768 cations Chemical class 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 208000035126 Facies Diseases 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007613 slurry method Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- -1 amine Compound Chemical class 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses slurry for stabilizing a shield excavated surface in a marine stratum and a construction method. The slurry is composite sodium-based bentonite slurry and is prepared by composite sodium-based bentonite. The composite sodium-based bentonite is formed by mixing sodium-based bentonite, polymers and an additive. According to the slurry for stabilizing the shield excavated surface in the marine stratum and the construction method, a shield excavated surface muddy water material is prepared by the composite sodium-based bentonite slurry adaptive to seawater and has the capability to resist seawater draining, and a research gap of stabilizing of the muddy water shield excavated surface in the marine stratum in the tunnel construction process is filled up; the idea of adopting muddy water high in seawater adaptability is put forward; the viscosity of the muddy water of the excavated surface is improved; and a high-quality mud film is formed to stabilize the excavated surface.
Description
Technical field
The present invention relates to shield-tunneling construction field, more particularly to a kind of it is applied to the stable mud in shield tunneling face in marine bed
Slurry and construction method.
Background technology
In recent years, track traffic development in domestic city is extremely rapid, and to before and after 2015, China builds up and building track friendship
Logical circuit is up to 158, and total kilometrage will be more than 4189 kilometers.Shield Method has mechanized construction degree height, opens
Dig efficiency high, the features such as effect on environment is little, obtained quite being widely applied in urban rail transit in China construction.
Modern tunnel construction engineering just gradually increases with cross section diameter, the trend of section complex formation.Existing shield
Construction is adapted to be constructed in more single soft soil layer, soft rock strata and layer of sand, and soft or hard it is uneven, on it is soft under
It is a greater impact when constructing in the hard and compound stratum containing high intensity hard rock, technical experience is deficient.
In existing shield construction, the stable method of slurry shield excavation face is in face shape using high-performance muddy water
Into high-quality mud film.In marine bed, seawater can make general muddy water material produce dripization, make muddy water performance decline to a great extent, from
And mud film quality is affected, certain difficulty is brought to stablizing for excavation face.Water quality used by existing muddy water preparation technique is running water,
Bad adaptability of the muddy water material to seawater.In slurry shield construction at present, the muddy water that seawater is adapted to used in marine bed is steady
Determine research or the blank of face.
The content of the invention
The technical problem to be solved is to provide and a kind of is applied to the stable mud in shield tunneling face in marine bed
Slurry and construction method, are the construction technology of the stable excavation face of muddy water that seawater is adapted in marine bed, solve marine bed shield
The stable problem of structure excavation face.
To realize above-mentioned technique effect, the invention discloses a kind of composite sodium-based bentonite mud, is applied to marine bed
Middle shield tunneling face is stable, and the composite sodium-based bentonite mud is formulated by composite sodium-based bentonite, described composite sodium-based
Bentonite is mixed by sodium bentonite, polymer and additive.
The composite sodium-based bentonite mud is further improved by, and includes sodium in the composition of the sodium bentonite
Base montmorillonite, includes montmorillonite, beidellite and nontronite.
The composite sodium-based bentonite mud is further improved by, and the polymer and the additive are gathered by amine
Compound is constituted with cellulose family additive.
The composite sodium-based bentonite mud is further improved by, the sodium bentonite, the polymer and institute
The content ratio for stating additive is 6：3：1.
The composite sodium-based bentonite mud is further improved by, the water content of the composite sodium-based bentonite mud
For 7%～10%, sand factor is less than 1%.
The composite sodium-based bentonite mud is further improved by, the colloidity of the composite sodium-based bentonite mud
More than 96%, filter loss is less than 20ml.
The composite sodium-based bentonite mud is further improved by, and the PF values of composite sodium-based bentonite mud are 7～
9。
The invention also discloses a kind of be applied to the stable construction method in shield tunneling face in marine bed, shield is in marine facies
Tunnel in stratum, composite sodium-based bentonite mud is sent into into excavation face, mud film, stable excavation face are formed in excavation face.
It is described be applied to marine bed in the stable construction method in shield tunneling face be further improved by, it is described compound
When the mud film is formed, produce mud pressure, and part mud pressure is changed into the soil body has effect to sodium bentonite mud
Power is acted in excavation face.
It is described be applied to marine bed in the stable construction method in shield tunneling face be further improved by, the soil body
Effective stress gradually increases from the top of the excavation face to bottom.
The present invention is as a result of above technical scheme so as to have the advantages that：Adapt to having to seawater
Property composite sodium-based bentonite mud configuration shield tunneling face muddy water material, the muddy water material has the ability of resistant to sea water dripization, uses
Amount is identical with general muddy water material；When shield is tunneled in marine bed, by the muddy water material for adding high viscosity and high concentration
Material, make the mud balance of feeding excavation face in 1.15g/cm3～1.25g/cm3, viscosity in more than 20s, so as to before face
It is square into high-quality mud film, keep excavation face stable.
Description of the drawings
Fig. 1 is that the excavation face stability principle for being applied to the stable construction method in shield tunneling face in marine bed of the invention shows
It is intended to.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further detailed explanation.
The present invention is applied to the main purpose of the stable mud in shield tunneling face and construction method in marine bed：Carry
For a kind of construction technology of the stable face of muddy water that seawater is adapted in marine bed, marine bed shield tunneling face is solved steady
Fixed problem.
Face is a term in tunnel construction, that is, excavate tunnel (mine, mining or Tunnel Engineering in) constantly to
The working face of front propulsion.Face is to excavate the working face constantly pushed ahead of tunnel, and it is not a fixed face, excavation face
There are face, abutment wall face and vault face, exactly face is that working face for constantly moving forward for facing shield.
Stable problem of the primary study just to the excavation face of shield in the present invention, therefore, face is exactly excavation face in the present invention,
That is, the working face that shield is constantly pushed ahead.
In existing shield construction, the stable method of slurry shield excavation face is in face shape using high-performance muddy water
Into high-quality mud film.In marine bed, seawater can make general muddy water material produce dripization, make muddy water performance decline to a great extent, from
And mud film quality is affected, certain difficulty is brought to stablizing for excavation face.Water quality used by existing muddy water configuring technical is running water,
Bad adaptability of the muddy water material to seawater.In slurry shield construction at present, the muddy water that seawater is adapted to used in marine bed is steady
Determine research or the blank of face.
Prior art：Hohai University professor Zhu Wei has done to the muddy water performance in slurry shield construction and has deeply ground for a long time
Study carefully.He thinks that part mud pressure is converted into effective stress and is acted in excavation face by the formation of mud film, supporting excavation face soil
Body, it is ensured that excavation face is stablized.Slip affects larger to mud film quality, and when level is matched somebody with somebody and density is identical, mud viscosity is high,
Physical stability is good, then mud film is easily formed, and formation mud film is thin, fine and close, and drainage amount is little.
General muddy water material is all to configure muddy water material, not only high cost, and the adaptability to seawater with running water
, arbitrarily there is dripization phenomenon in difference, and the mud film quality of formation is poor, stablizes unfavorable to shield tunneling face.
Therefore, the invention provides a kind of muddy water that seawater is adapted in marine bed stablizes the composite sodium-based swollen of face
The native mud of profit, in being applied to marine bed, shield tunneling face is stable.The composite sodium-based bentonite mud is by composite sodium-based bentonite
Directly it is formulated, and the composite sodium-based bentonite is mixed by two parts, a part is high-quality sodium bentonite, another portion
It has been the polymer and additive for proposing the effect of viscous, filtrate reducing to divide.Wherein, the content ratio of sodium bentonite, polymer and additive
Generally 6：3：1 (weight).
The main component of sodium bentonite is na-montmorillonite (ENa+/Σ EC >=50%).
Key component is：Montmorillonite Na+ 0.33(Al1.67Mg0.33)Si4O10(OH)2·nH2。
Beidellite Na+ 0.33Al2(Si3.67Al0.33)O10(OH)2·nH2O。
Nontronite Na+ 0.33Fe3+ 2(Si3.67Al0.33)O10(OH)2·nH2O。
Wherein, montmorillonite is a kind of natural nano-material, and to be similar to sandwich, levels are silicon-oxy tetrahedrons to structure, in
Between be alumina octahedral, interlamellar spacing is 0.8 nanometer～1.0 nanometers, and interlayer is negatively charged, with very strong ion exchangeable, main
If cation such as Na+、Ca2+、K+、Mg2+、Li+、H+、Al3+Deng exchange is reversible.Hand in the medium cationic that pH is 7
Capacity is changed for 70me/100g～140me/100g.Colloidality with very strong adsorption capacity and height, plasticity and bonding
Power, therefore water imbibition is very strong, add water expansion, and volume can increase several times to more than ten times.Natural smectite is with the commutative sun of its interlayer
The species of ion, content divide genotype, when the content of a certain cation exceedes cation exchange capacity (Σ EC) 50%, i.e., with
The cation is named, such as na-montmorillonite (ENa+/Σ EC >=50%), ca-montmorillonite (ECa2+/Σ EC >=50%), aluminium
Base montmorillonite (EAl3+/Σ EC >=50%).When interlayer neither one cations are more than 50% exchange capacity, then containing
Two most cation names of amount, such as Ca-Na-montmorillonite, calcium and magnesium base montmorillonite etc..
Ca in seawater2+Ion concentration is too high, can affect bentonitic pulping performance, makes bentonite cohesion sedimentation separation；
Work as Cl-Ion concentration is too high, can affect the cohesive force between clay particle, reduces the viscosity and shear force of muddy water, and fluid loss increases
Greatly, stability declines.
And the present invention using na-montmorillonite (ENa+/Σ EC >=50%) as the main component of sodium bentonite, can be with
Ca in seawater is solved well2+The too high problem of ion concentration, reduces the harmful effect to ringing the cohesive force between clay particle；
Cl in seawater can also be reduced simultaneously-The content of ion, improves the viscosity of muddy water, and physical stability is good, and mud film is easily formed, and shape
Thin, fine and close into mud film, drainage amount is little.
Polymer, additive in composite sodium-based bentonite mud of the present invention is mainly added by amine polymer and cellulose family
Plus agent composition, contribute to controlling the leakage of mud, and lift the performance of mud, form the colloidal solution of cross-linked network.
The polymer of mud viscosity is lifted, with swelling soil interaction, good mud skeleton is formed.Bentonite mud is provided
The higher gel strength of slurry and gel strength.
Mud leakage control additive, with swelling soil interaction, forms thin and compact mud skin in hole wall, reduces mud
Filter loss.
The main performance index of composite sodium-based bentonite mud of the present invention is as shown in following table table 1：
The main performance index of 1 composite sodium-based bentonite mud of table
| Water content | 7～10% |
| Granularity | 99～100% can pass through 200 eye mesh screens |
| Sand content | <1% |
| Colloidity | >96% |
| Filter loss | <20ml |
| PH value | 7～9 |
It is below that shield tunneling face is steady during one kind of application composite sodium-based bentonite mud of the present invention is applied to marine bed
Fixed construction method, predominantly：When shield is tunneled in marine bed, by adding the composite sodium-based swollen of high viscosity and high concentration
The muddy water material of the native mud configuration of profit, makes the mud balance of feeding excavation face in g/cm3～1.25g/cm3, viscosity in more than 20s,
So as to form high-quality mud film in front of tunnel heading, keep excavation face stable.
Coordinate shown in Fig. 1, shield tunneling face stable mechanism is：Mud pressure be equal to slurry penetration pressure and ground water pressure it
With.Composite sodium-based bentonite mud produces mud pressure, and part mud pressure is converted when front of tunnel heading forms mud film
Act in excavation face into soil body effective stress, with soil pressure P in original soil layerSoilWith ground water pressure PWaterContend with, balance excavation face
Stressing conditions, so as to stablize excavation face.It can be seen that the soil body effective stress obtained by mud pressure Partial Conversion
Gradually increase from the top of excavation face to bottom, with soil pressure P in original soil layerSoilWith ground water pressure PWaterDistribution is consistent.
The present invention is applied to the stable mud in shield tunneling face and construction method in marine bed and provides a kind of adapt to sea
The high-quality composite sodium-based bentonite mud of water, in marine bed, the high-quality muddy water of adaptation seawater advantageously forms high-quality
Mud film, stably favourable to excavation face, the present invention with having adaptive composite sodium-based bentonite mud configuration shield to seawater
Excavation face muddy water material, the muddy water material have the ability of resistant to sea water dripization, and consumption is identical with general muddy water material；Shield is in marine facies
When tunneling in stratum, by the muddy water material for adding high viscosity and high concentration, the mud balance of feeding excavation face is made to exist
1.15g/cm3～1.25g/cm3, viscosity so as to form high-quality mud film in front of tunnel heading, keeps excavation face in more than 20s
It is stable.During compensate for tunnel construction, the research stable to slurry shield excavation face in marine bed is blank；Propose employing
The adaptable muddy water of seawater, improves the viscosity of the muddy water of excavation face, forms high-quality mud film to stablize excavation face.
The present invention is described in detail above in association with drawings and Examples, those skilled in the art can basis
Described above makes many variations example to the present invention.Thus, some of embodiment details should not constitute limitation of the invention,
The present invention is by the scope defined using appended claims as protection scope of the present invention.
Claims (10)
1. a kind of composite sodium-based bentonite mud, in being applied to marine bed, shield tunneling face is stable, it is characterised in that：It is described multiple
Close sodium bentonite mud to be formulated by composite sodium-based bentonite, the composite sodium-based bentonite is by sodium bentonite, polymerization
Thing and additive are mixed.
2. composite sodium-based bentonite mud as claimed in claim 1, it is characterised in that：Wrap in the composition of the sodium bentonite
Containing na-montmorillonite, include montmorillonite, beidellite and nontronite.
3. composite sodium-based bentonite mud as claimed in claim 1, it is characterised in that：The polymer and the additive by
Amine polymer is constituted with cellulose family additive.
4. composite sodium-based bentonite mud as claimed in claim 1, it is characterised in that：The sodium bentonite, the polymerization
The content ratio of thing and the additive is 6：3：1.
5. composite sodium-based bentonite mud as claimed in claim 1, it is characterised in that：The composite sodium-based bentonite mud
Water content is 7%～10%, and sand factor is less than 1%.
6. composite sodium-based bentonite mud as claimed in claim 1, it is characterised in that：The composite sodium-based bentonite mud
Colloidity is more than 96%, and filter loss is less than 20ml.
7. composite sodium-based bentonite mud as claimed in claim 1, it is characterised in that：The PF values of composite sodium-based bentonite mud
For 7～9.
It is 8. a kind of to be applied to the stable construction method in shield tunneling face in marine bed, it is characterised in that：Shield is in marine bed
Composite sodium-based bentonite mud as described in any one in claim 1～7 is sent into excavation face, in excavation face by middle driving
Form mud film, stable excavation face.
9. the stable construction method in shield tunneling face in marine bed is applied to as claimed in claim 8, it is characterised in that：Institute
Composite sodium-based bentonite mud is stated when the mud film is formed, mud pressure is produced, and part mud pressure is changed into into the soil body
Effective stress is acted in excavation face.
10. the stable construction method in shield tunneling face in marine bed is applied to as claimed in claim 8, it is characterised in that：
The soil body effective stress gradually increases from the top of the excavation face to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953599.XA CN106522965A (en) | 2016-11-03 | 2016-11-03 | Slurry for stabilizing shield excavated surface in marine stratum and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953599.XA CN106522965A (en) | 2016-11-03 | 2016-11-03 | Slurry for stabilizing shield excavated surface in marine stratum and construction method |
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| CN106522965A true CN106522965A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358491A (en) * | 2018-02-02 | 2018-08-03 | 中南大学 | A kind of integrated conduct method and mixing feeding device of shield discarded slurry |
| CN109749748A (en) * | 2018-12-20 | 2019-05-14 | 中铁开发投资集团有限公司 | A kind of rich water round gravel stratum shield sediment improvement method and sediment improvement agent |
| CN110437812A (en) * | 2019-08-28 | 2019-11-12 | 中铁隧道局集团有限公司 | A kind of shield warehouse entry slurries with pressure and preparation method thereof |
| CN112110682A (en) * | 2020-08-10 | 2020-12-22 | 中交武汉港湾工程设计研究院有限公司 | High-efficiency plugging film-forming shield slurry material for emergency |
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| CN112110682A (en) * | 2020-08-10 | 2020-12-22 | 中交武汉港湾工程设计研究院有限公司 | High-efficiency plugging film-forming shield slurry material for emergency |
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