CN106351665A - Construction method using slag and soil improvement in soil pressure balance type rectangular shield top tunneling of sand gravel stratum - Google Patents
Construction method using slag and soil improvement in soil pressure balance type rectangular shield top tunneling of sand gravel stratum Download PDFInfo
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- CN106351665A CN106351665A CN201610975489.3A CN201610975489A CN106351665A CN 106351665 A CN106351665 A CN 106351665A CN 201610975489 A CN201610975489 A CN 201610975489A CN 106351665 A CN106351665 A CN 106351665A
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- 239000002689 soil Substances 0.000 title claims abstract description 62
- 230000006872 improvement Effects 0.000 title claims abstract description 36
- 239000004576 sand Substances 0.000 title claims abstract description 20
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 230000005641 tunneling Effects 0.000 title abstract description 7
- 239000002893 slag Substances 0.000 title abstract description 4
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 18
- 239000000440 bentonite Substances 0.000 claims abstract description 18
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 239000006260 foam Substances 0.000 claims description 42
- 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 22
- 229940080314 sodium bentonite Drugs 0.000 claims description 22
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 22
- 239000013049 sediment Substances 0.000 claims description 19
- 229940092782 bentonite Drugs 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 239000011550 stock solution Substances 0.000 claims description 7
- 238000005187 foaming Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 229910052925 anhydrite Inorganic materials 0.000 claims description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 7
- 230000001976 improved effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 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 abstract description 3
- 229910052708 sodium Inorganic materials 0.000 abstract description 3
- 239000011734 sodium Substances 0.000 abstract description 3
- 239000004088 foaming agent Substances 0.000 abstract 3
- 239000012530 fluid Substances 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 102000002322 Egg Proteins Human genes 0.000 description 2
- 108010000912 Egg Proteins Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 210000004681 ovum Anatomy 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000004503 fine granule Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007619 statistical method 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
-
- 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
- E21D9/002—Injection methods characterised by the chemical composition used
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a construction method using slag and soil improvement in soil pressure balance type rectangular shield top tunneling of sand gravel stratum. The construction method is characterized in that according to the sand gravel stratum structure under particular conditions, a slag and soil improvement agent which is prepared by matching sodium-based bentonite and foaming agent is adopted; in the whole rectangular shield top tunneling construction process, a tunnel face maintains good stability, the abrasion of tool discs and tools is slight, and the torques of the tool discs and a screw machine are respectively controlled within the normal range; the sodium-based bentonite slurry is filled via the upper tool disc, and the foaming agent is filled via the lower tool disc, so that the fluid plasticity of a sand gravel soil body is effectively improved, and the seepage of the foaming agent out of pavements and green belts is prevented.
Description
Technical field
The invention belongs to technical field of building construction, particularly to a kind of pick of sand-pebble layer earth pressure balance rectangular shield top
Sediment improvement construction method.
Background technology
The key factor that can the pick construction of sand-pebble layer rectangular shield top be smoothed out is exactly sediment improvement, dregs
Improvement is directed to addition sediment improvement agent in the very poor soil body of stream plasticity that knife cutting gets off, is sufficiently stirred for it by stirring rod
Form a kind of dregs of Plastic Flow state afterwards so as to discharge by conveying worm, if the soil body has stream, and plasticity is poor, permeability
By force, the features such as porosity and internal friction angle are big, dregs is difficult to smoothly discharge by conveying worm, and normal tunneling construction is produced
Considerable influence forms it into Plastic Flow state it is therefore desirable to carry out improvement to dregs.
Renminnan Road rectangular shield top pick walkway engineering is worn off field for relying on the underground parking of Chengdu Sichuan University,
The underground parking of Chengdu Sichuan University is worn Renminnan Road rectangular shield top pick walkway off field and is mainly passed through from boulder bed, becomes
Renminnan Road three sections of sand-pebble layer cobble contents in city are high, soil body frictional resistance is difficult to possess good mobility greatly, in pick
Can make it is impossible to smoothly effectively carry out deslagging when the soil body of this stream plasticity difference is full of Tu Cang and conveying worm during entering
Cutterhead and conveying worm moment of torsion is become to increase, impact is normal to tunnel, and therefore carries out effective dregs for this sand-pebble layer and changes
The good construction for whole passage it is critical that.
Content of the invention
It is an object of the invention to: for above-mentioned problem, a kind of stream plasticity that can improve dregs is provided it is ensured that
The sand-pebble layer earth pressure balance rectangular shield top pick sediment improvement construction method that dregs is smoothly discharged and excavation face is stable.
The technical scheme is that and be achieved in that: sand-pebble layer earth pressure balance rectangular shield top pick sediment improvement is applied
Work method it is characterised in that: comprise the following steps:
A), for the analysis of the sand-pebble layer soil body, described sand-pebble layer includes boulder bed and sandy soils, described boulder bed
In the soil body, the cobble content of slightly close boulder bed is 55%～60%, and particle diameter is 3 mm～5mm, in the cobble content of close boulder bed be
60%～70%, particle diameter is 4 mm～5mm, and the cobble content of closely knit boulder bed is more than 70%, and particle diameter is 5 mm～8mm；Described sand
In the soil body of layer, the thickness of fine sand layer is 1.5m～2.7m, and the thickness of middle layer of sand is 0.8m～1.1m, described fine sand layer and middle sand
Layer is by the hard particles composition of Anhydrite, quartz and sandstone；
B), it is directed to the peculiar composition structure of above-mentioned sand-pebble layer, prepare sediment improvement agent, described sediment improvement agent includes sodio
Bentonite and foam；For the soil property of sand-pebble layer, foam stock solution is mixed with water, being configured to concentration is 2%～2.5%
Solution, coefficient of foaming is set as 10～12 times, and foam injection rate is 100%；Sodium bentonite is mixed with water, uniformly stirs
Mix and stand expanded, be configured to 6%～8% sodium bentonite mud；
C), the spurting of modifying agent, the applicator that the foam of preparation is pumped into cutter head panel sprays, the sodium bentonite mud of preparation
The mud nozzle that stock pump delivers to cutter head panel sprays, and for the characteristic of above-mentioned sand-pebble layer soil property, rectangular shield top pick machine exists
During the pick of top, inject sodium bentonite mud using to top cutterhead, the mode that bottom cutterhead injects foam carries out the soil body
Improvement.
Sediment improvement construction method is dug on sand-pebble layer earth pressure balance rectangular shield top of the present invention, and it is in described step
Rapid b) in, after foam stock solution and clear water stir in blending bin, be pumped in foam maker by foams mix pump
Form foam after mixing with air, and be pumped into the applicator ejection that machine bottom cutter head panel is dug on rectangular shield top；Sodio
After bentonite and clear water stir in bentonite agitator tank, be pumped in slurry can, fully expanded after Na-bentonite
Native mud is pumped into, by slush pump, the mud nozzle ejection that machine top cutter head panel is dug on rectangular shield top.
The present invention is directed to the sand-pebble layer structure under particular condition, the slag matching using sodium bentonite and foam
Native modifying agent, in whole rectangular shield top pick work progress, makes excavation face maintain good stability, knife disc tool
Abrasion is slight, and cutterhead and spiral shell machine moment of torsion are all within normal range, and pass through to inject sodium bentonite mud from top cutterhead, under
Portion's cutterhead injects the mode of foam, not only can effectively improve the stream plasticity of the sandy gravel soil body, and be prevented from foam
Ooze out from road surface and greenbelt.
The invention has the beneficial effects as follows:
1st, improve the stream plasticity of the excavation face sandy gravel soil body, improve deslagging efficiency, it is to avoid because deslagging does not freely lead to spiral transferring
Machine is sent to block, impact is normal to tunnel.
2nd, reduce the internal friction angle of dregs in the face sandy gravel soil body and native storehouse, thus reducing cutterhead, cutter and spiral shell
The abrasion of rotation conveyor blade, reduces the moment of torsion of cutterhead and spiral shell machine in tunneling process.
3rd, improve the plasticity of the sandy gravel soil body in native storehouse, prevent cutterhead mud lining.
4th, improve dregs impermeabilisation ability, it is to avoid face is because discharging consolidation causes larger surface subsidence or collapses
Collapse.
Specific embodiment
The present invention is described in detail below.
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
Embodiment: sediment improvement construction method is dug on a kind of sand-pebble layer earth pressure balance rectangular shield top, walks including following
Rapid:
A), for the analysis of the sand-pebble layer soil body, described sand-pebble layer includes boulder bed and sandy soils, described boulder bed
In the soil body, the cobble content of slightly close boulder bed is 55%～60%, and particle diameter is 3 mm～5mm, and natural density γ is 20.5 kn/m3,
Deformation modulus eo is 20～26 mpa, and internalfrictionangleφ is 30 °～37 °, characteristic load bearing capacity fakFor 300-350 kpa；In close
The cobble content of boulder bed is 60%～70%, and particle diameter is 4 mm～5mm, and natural density γ is 21.0 kn/m3, deformation modulus eo
For 30～36 mpa, internalfrictionangleφ is 40 °～45 °, characteristic load bearing capacity fakFor 500～560 kpa；The ovum of closely knit boulder bed
Stone content is more than 70%, and particle diameter is 5 mm～8mm, and natural density γ is 22.0 kn/m3, deformation modulus eo is 42～50 mpa,
Internalfrictionangleφ is 42 °～47 °, characteristic load bearing capacity fakFor 800～880 kpa；In the soil body of described sandy soils, fine sand layer
Thickness is 1.5m～2.7m, and natural density γ is 18.5 kn/m3, deformation modulus eo is 6～9 mpa, and internalfrictionangleφ is 18 °
～23 °, characteristic load bearing capacity fakFor 90～100 kpa；The thickness of middle layer of sand is 0.8m～1.1m, and natural density γ is 19.0
kn/m3, deformation modulus eo is 7～10 mpa, and internalfrictionangleφ is 19 °～24 °, characteristic load bearing capacity fakFor 110～120
Kpa, described fine sand layer and middle layer of sand are by the hard particles composition of Anhydrite, quartz and sandstone.
By soil body analytical data, the sand-pebble layer internal friction angle that the pick of rectangular shield top is passed through is larger, to shield
The cutterhead of top pick machine and spiral shell machine produce larger abrasion and easily occlusion condition in native storehouse.This stratum cobble content simultaneously
Higher, particle diameter is larger, easily because dregs poor fluidity causes residue extraction mechanism blocking and cutterhead mud lining in top pick work progress,
Therefore for this sand-pebble layer carry out effective sediment improvement for the construction of whole passage it is critical that.
B), it is directed to the peculiar composition structure of above-mentioned sand-pebble layer, prepare sediment improvement agent, described sediment improvement agent includes
Sodium bentonite and foam；For the soil property of sand-pebble layer, foam stock solution is mixed with water, being configured to concentration is 2.5%
Solution, coefficient of foaming is set as 12 times, and foam injection rate is 100%；Sodium bentonite is mixed with water, uniform stirring is simultaneously
Standing is expanded, is configured to 7% sodium bentonite mud.
The preparation of wherein sediment improvement agent is the three sections of sandy gravel ground of Renminnan Road passing through for the pick construction of rectangular shield top
The feature that layer soil body grain composition is poor, cohesiveness poor and frictional force is big, is obtained based on specific experiment, using the sodium of above-mentioned preparation
Base bentonite mud and foam can carry out improvement and improve stream plasticity to the soil body, reduces the abrasion to cutterhead and residue extraction mechanism,
Improve dregs transportation performance.
Specific experiment process is as follows:
The sandy gravel soil body that experiment uses takes from rectangular shield top pick job site, and experimental apparatus include mortar mixer, cement
Mortar fluidity analyzer, high speed agitator, graduated cylinder, beaker.
(1) preparation of foam
For sand-pebble layer soil sample, when being foamed, foam stock solution is configured to the solution that concentration is 2.5%, foaming times
Number is set as 12 times.Measure 975ml water with graduated cylinder, put in the empty barrel that volume is 25l, be subsequently added 25ml foam, use
High speed agitator is stirred, and stops foaming when the volume of foam is sent to the graduation mark of 12l.By the sandy gravel soil body before improvement
Load and be positioned in the truncated cone circle mould that fluidity measures on platform, lift round mould, the soil body is in natural packing shape, vibration table vibrates 25 times
Afterwards, the soil body is in dispersed.Take 1l soil sample to put in mortar mixer, add 1000ml foam, observe the soil body after stirring 1min and change
Good situation.By improvement after sandy gravel soil body 500ml put in measuring cup, be inverted in vibration table, lift the measuring cup soil body uniform under
Heavy, after vibration table vibrates 25 times, the soil body uniformly spreads, and keeps good cohesiveness and uniformity in diffusion process.
Sandy gravel soil body slump range after the foam improvement of above-mentioned match ratio is 116mm to 145mm, places
Good cohesiveness and uniformity can be shown in vibration table after 25 vibrations, this foam of preliminary proof can be relatively
Improve well the sandy gravel soil body in this location, improve the abrasion of dregs transportation efficiency, reduction cutterhead and conveying worm.
Can be seen that foam volume from above-mentioned experimental result is 2.5%, and 12 times of coefficient of foaming can during injection rate 100%
The soil body is effectively improved.The sandy gravel soil body after improvement has good uniformity, and large or fine granule is in the presence of foam
It is evenly distributed, presents good cohesiveness under vibrating conditions, bulk flow plasticity is greatly improved.This is beneficial to cutterhead
Cutting and conveying worm transport, the abrasion to cutterhead and conveying worm can be reduced simultaneously.
(2) preparation of sodium bentonite mud
Measure 1l water with graduated cylinder, add sodium bentonite in water according to certain mixing ratio, quiet after uniform stirring 5min
Put expanded 12h.Make the bentonite slurry of different ratio according to experiment demand.Fetch the sand ovum that volume is 5l from job site
Stone soil, these soil is divided into 5 parts is added in the bentonite slurry prepared in advance and be sufficiently stirred for 5min, then by this 5 parts
It is put into vibration 25 times, the cohesiveness according to the soil body and uniformity on vibration table through the sandy gravel soil body of improvement, judge bentonite
The improved effect to the sandy gravel soil body for the mud, selects the bentonite slurry match ratio of suitable sand-pebble layer sediment improvement.According to
After job site technical staff observation contrast, (i.e. the quality of sodium bentonite accounts for mud gross mass to the bentonite slurry of discovery 7%
Percentage ratio) improved effect meets driving and requires, and soil body stream plasticity is preferable.
Sandy gravel soil body slump range after the sodium bentonite improvement of above-mentioned preparation is 133mm to 156mm, swollen
The native mud of profit can be combined together cobble and sand well, by playing the feature of bentonite itself colloid lubrication, improves
The viscosity of the sandy gravel soil body and mobility, the working environment that is effectively improved conveying worm in tunneling process makes dregs suitable
Profit is discharged, and prevents conveying worm from clogging.
C), the spurting of modifying agent, the applicator that the foam of preparation is pumped into cutter head panel sprays, the Na-bentonite of preparation
The mud nozzle of native mud pumping to cutter head panel sprays, and for the characteristic of above-mentioned sand-pebble layer soil property, rectangular shield top is dug
Machine, during the pick of top, injects sodium bentonite mud using to top cutterhead, and the mode that bottom cutterhead injects foam is carried out
Soil improvement.The change of cutter head torque in the whole work progress of statistical analysiss after the formal insertion of passage, cutterhead peak torque is equal
Without departing from rated value, and when in tunneling process, conveying worm is normally slagged tap torque range in 13 to 50kn m, less than volume
Definite value 72kn m.Thus may determine that foam and bentonite slurry achieve well to the sandy gravel soil improvement of face
Effect, effectively reducing cutterhead and spiral shell machine moment of torsion it is ensured that excavating the stablizing of face, not causing cutterhead and spiral shell machine because turning round
Square is excessive and card stops, the phenomenon of the normal driving of impact.
Wherein, in described step b), after foam stock solution and clear water stir in blending bin, by foams mix
Pump is pumped to formation foam after mixing in foam maker with air, and is pumped into rectangular shield top pick machine bottom cutter head panel
Applicator spray；After sodium bentonite and clear water stir in bentonite agitator tank, it is pumped in slurry can, fills
Sodium bentonite mud after point expanded is pumped into, by slush pump, the mud nozzle spray that machine top cutter head panel is dug on rectangular shield top
Go out.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (2)
1. sand-pebble layer earth pressure balance rectangular shield top pick sediment improvement construction method it is characterised in that: comprise the following steps:
A), for the analysis of the sand-pebble layer soil body, described sand-pebble layer includes boulder bed and sandy soils, described boulder bed
In the soil body, the cobble content of slightly close boulder bed is 55%～60%, and particle diameter is 3 mm～5mm, in the cobble content of close boulder bed be
60%～70%, particle diameter is 4 mm～5mm, and the cobble content of closely knit boulder bed is more than 70%, and particle diameter is 5 mm～8mm；Described sand
In the soil body of layer, the thickness of fine sand layer is 1.5m～2.7m, and the thickness of middle layer of sand is 0.8m～1.1m, described fine sand layer and middle sand
Layer is by the hard particles composition of Anhydrite, quartz and sandstone；
B), it is directed to the peculiar composition structure of above-mentioned sand-pebble layer, prepare sediment improvement agent, described sediment improvement agent includes sodio
Bentonite and foam；For the soil property of sand-pebble layer, foam stock solution is mixed with water, being configured to concentration is 2%～2.5%
Solution, coefficient of foaming is set as 10～12 times, and foam injection rate is 100%；Sodium bentonite is mixed with water, uniformly stirs
Mix and stand expanded, be configured to 6%～8% sodium bentonite mud；
C), the spurting of modifying agent, the applicator that the foam of preparation is pumped into cutter head panel sprays, the sodium bentonite mud of preparation
The mud nozzle that stock pump delivers to cutter head panel sprays, and for the characteristic of above-mentioned sand-pebble layer soil property, rectangular shield top pick machine exists
During the pick of top, inject sodium bentonite mud using to top cutterhead, the mode that bottom cutterhead injects foam carries out the soil body
Improvement.
2. sediment improvement construction method is dug on sand-pebble layer earth pressure balance rectangular shield top according to claim 1, and it is special
Levy and be: in described step b), after foam stock solution and clear water stir in blending bin, pumped by foams mix pump
Form foam after mixing with air to foam maker, and be pumped into the foam that machine bottom cutter head panel is dug on rectangular shield top
Spout sprays；After sodium bentonite and clear water stir in bentonite agitator tank, it is pumped in slurry can, fully expanded
Sodium bentonite mud afterwards is pumped into, by slush pump, the mud nozzle ejection that machine top cutter head panel is dug on rectangular shield top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610975489.3A CN106351665A (en) | 2016-11-07 | 2016-11-07 | Construction method using slag and soil improvement in soil pressure balance type rectangular shield top tunneling of sand gravel stratum |
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| CN201610975489.3A CN106351665A (en) | 2016-11-07 | 2016-11-07 | Construction method using slag and soil improvement in soil pressure balance type rectangular shield top tunneling of sand gravel stratum |
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| CN108508159A (en) * | 2018-05-11 | 2018-09-07 | 洛阳理工学院 | A kind of novel stirring external sediment improvement testing stand |
| CN109915156A (en) * | 2019-03-05 | 2019-06-21 | 中交二航局成都城市建设工程有限公司 | A kind of sand-pebble layer earth pressure balanced shield, EPBS opens a position tool changing auxiliary construction method |
| CN110424970A (en) * | 2019-07-16 | 2019-11-08 | 安徽省交通航务工程有限公司 | A method of viaduct bridge pier formation shield tunnel is worn sticking shield side in texture stratum again |
| CN110566211A (en) * | 2019-09-04 | 2019-12-13 | 中交一公局第三工程有限公司 | Earth pressure shield muck flow plasticity improvement method suitable for sandy gravel stratum |
| CN110656943A (en) * | 2018-06-28 | 2020-01-07 | 中南大学 | Method for improving shield sandy muck improvement capacity and determining parameters |
| CN111894609A (en) * | 2020-08-10 | 2020-11-06 | 中国电建集团铁路建设有限公司 | Slurry balance shield stone taking device and construction method |
| CN113062744A (en) * | 2021-03-09 | 2021-07-02 | 中交路桥北方工程有限公司 | Water-rich sandy gravel stratum shield construction muck improvement method and shield construction method |
| CN113153333A (en) * | 2021-03-25 | 2021-07-23 | 北京城建集团有限责任公司 | Shield efficient tunneling method suitable for sandy gravel stratum |
| CN113310714A (en) * | 2021-03-19 | 2021-08-27 | 无锡地铁集团有限公司 | Visual test system for simulating rectangular pipe jacking construction |
| CN113756814A (en) * | 2021-08-09 | 2021-12-07 | 北京新铁瑞达科技发展有限公司 | Preparation control method, device and equipment of muck modifier and storage medium |
| CN113944472A (en) * | 2021-08-26 | 2022-01-18 | 中铁三局集团有限公司 | Muck improvement method |
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| CN108508159A (en) * | 2018-05-11 | 2018-09-07 | 洛阳理工学院 | A kind of novel stirring external sediment improvement testing stand |
| CN110656943B (en) * | 2018-06-28 | 2020-12-04 | 中南大学 | Method for improving shield sandy muck improvement capacity and determining parameters |
| CN110656943A (en) * | 2018-06-28 | 2020-01-07 | 中南大学 | Method for improving shield sandy muck improvement capacity and determining parameters |
| CN109915156A (en) * | 2019-03-05 | 2019-06-21 | 中交二航局成都城市建设工程有限公司 | A kind of sand-pebble layer earth pressure balanced shield, EPBS opens a position tool changing auxiliary construction method |
| CN110424970A (en) * | 2019-07-16 | 2019-11-08 | 安徽省交通航务工程有限公司 | A method of viaduct bridge pier formation shield tunnel is worn sticking shield side in texture stratum again |
| CN110566211B (en) * | 2019-09-04 | 2020-11-24 | 中交一公局第三工程有限公司 | Earth pressure shield muck flow plasticity improvement method suitable for sandy gravel stratum |
| CN110566211A (en) * | 2019-09-04 | 2019-12-13 | 中交一公局第三工程有限公司 | Earth pressure shield muck flow plasticity improvement method suitable for sandy gravel stratum |
| CN111894609A (en) * | 2020-08-10 | 2020-11-06 | 中国电建集团铁路建设有限公司 | Slurry balance shield stone taking device and construction method |
| CN113062744A (en) * | 2021-03-09 | 2021-07-02 | 中交路桥北方工程有限公司 | Water-rich sandy gravel stratum shield construction muck improvement method and shield construction method |
| CN113310714A (en) * | 2021-03-19 | 2021-08-27 | 无锡地铁集团有限公司 | Visual test system for simulating rectangular pipe jacking construction |
| CN113153333A (en) * | 2021-03-25 | 2021-07-23 | 北京城建集团有限责任公司 | Shield efficient tunneling method suitable for sandy gravel stratum |
| CN113153333B (en) * | 2021-03-25 | 2023-11-24 | 北京城建集团有限责任公司 | Shield efficient tunneling method suitable for sandy pebble stratum |
| CN113756814A (en) * | 2021-08-09 | 2021-12-07 | 北京新铁瑞达科技发展有限公司 | Preparation control method, device and equipment of muck modifier and storage medium |
| CN113944472A (en) * | 2021-08-26 | 2022-01-18 | 中铁三局集团有限公司 | Muck improvement method |
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