CN108643929A - A kind of compound stratum shield sediment improvement construction system and its construction method - Google Patents
A kind of compound stratum shield sediment improvement construction system and its construction method Download PDFInfo
- Publication number
- CN108643929A CN108643929A CN201810422054.5A CN201810422054A CN108643929A CN 108643929 A CN108643929 A CN 108643929A CN 201810422054 A CN201810422054 A CN 201810422054A CN 108643929 A CN108643929 A CN 108643929A
- Authority
- CN
- China
- Prior art keywords
- bentonite
- foam
- shield
- sediment improvement
- compound stratum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 39
- 150000001875 compounds Chemical class 0.000 title claims abstract description 24
- 239000013049 sediment Substances 0.000 title claims abstract description 23
- 239000000440 bentonite Substances 0.000 claims abstract description 70
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 70
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000006260 foam Substances 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 239000010881 fly ash Substances 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 239000000243 solution Substances 0.000 claims abstract description 23
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000004088 foaming agent Substances 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims description 19
- 239000011083 cement mortar Substances 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 9
- 239000010883 coal ash Substances 0.000 claims description 9
- 238000000855 fermentation Methods 0.000 claims description 9
- 230000004151 fermentation Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 230000008674 spewing Effects 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims 1
- 235000019353 potassium silicate Nutrition 0.000 claims 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims 1
- 230000008961 swelling Effects 0.000 claims 1
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000001976 improved effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation 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
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to technical field of building construction, more specifically, it is related to a kind of compound stratum shield sediment improvement construction system and its construction method, the system includes bentonite system and foam injection systems, further include Tu Cang displacement knife-changing systems, Tu Cang displacement knife-changing systems are combined with bentonite system and foam injection systems, injection foam solution and after bentonite slurry is stirred, replacement cutter can be carried out, replacing construction is reduced, effectively demonstrate,proves driving speed；And using foaming agent and P1 polymer and flyash is mixed, stream plasticity, consistency, lower water penetration and the smaller frictional resistance for so that the dregs that shield is cut has been had.
Description
Technical field
The present invention relates to technical field of building construction, more specifically, are related to a kind of compound stratum shield sediment improvement and apply
Work system and its construction method.
Background technology
Sediment improvement is exactly the dedicated unit that is configured by shield to cutterhead face, is injected in native storehouse or in screw conveyor
The additives such as water, foam, bentonite, high molecular polymer utilize the Stirring of cutterhead, native storehouse agitating device or spiral transferring
Send machine selection stirring that additive is made to be mixed with soil slag, make stream plasticity, suitable consistency that the dregs that shield is cut had,
Lower water penetration and smaller frictional resistance.Sediment improvement is to ensure the safe and smooth quick important means of shield-tunneling construction, is had
The impermeabilisation ability for improving dregs in native storehouse, avoids excavation face from causing larger ground settlement because of discharging consolidation or thing of caving in
Therefore prevented also from or mitigate screw conveyor casting when spewing phenomenon；The workability for improving dregs in native storehouse reduces in native storehouse
Dregs and the cohesion for excavating the soil body, and make dregs that there is preferable earth pressure balance effect.
Compound stratum refer to by within the scope of excavated section and excavate extending direction on, by two or more Different Strata
Composition, and the bottom combination that the features such as the rock-soil mechanics on these stratum, engineering geology and hydrogeology differ greatly.It is generally divided into
Three categories：One kind is the combination of the Different Strata in the vertical direction of end face；One kind is the various combination of bottom in the horizontal direction；
One kind is that above-mentioned the two haves both at the same time.Compound stratum shield-tunneling construction needs often transformation shield-tunneling construction pattern, in addition shield machine
Configuration is also required to make adjustment appropriate, needs constantly to adjust cutterhead aperture opening ratio, for special compound stratum, it is also necessary to carry out
Some auxiliary methods, especially " upper soft lower hard " stratum, which has the following aspects：（1）It greatly reduces
Driving speed causes construction delay；（2）The damage for easily causing shield cutter, cutterhead causes long-time shutdown to handle, expense
It is high, and it is susceptible to security risk；（3）It is be easy to cause ground cave-in accident, it is dangerous high.Therefore, it is a kind of that there is an urgent need for designs
It is various to solve the problems, such as that " upper soft lower hard " chronostratigraphic zone comes with synthesis for new technical solution.
Invention content
In the presence of overcoming the shortcomings of the prior art, the present invention provides a kind of compound stratum shield sediment improvement construction
System and its construction method, solve that driving speed existing in the prior art is full, shield cutter damage is serious and leads to ground
Cave-in accident problem.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of compound stratum shield sediment improvement construction system, including bentonite system and foam injection systems, further include Tu Cang
Knife-changing system is replaced, the bentonite system includes bentonite stirring system and bentonite injected system；The bentonite stirring
System is connected by pipeline with the bentonite storage tank of shield machine；The bentonite injected system include bentonite agitator tank and
Bentonite fermentation tank, the bentonite agitator tank are connected by grout outlet with bentonite fermentation tank, the bentonite storage tank
It is connected between bentonite fermentation tank and slurry is sent to manage；The foam injection systems include foam pump and foam generating system, described
Foam pump coordinates the foam generating system to use, and the foam solution that foam generating system generates is injected in front of the cutterhead
In face and native storehouse；The Tu Cang displacements knife-changing system includes shield tail synchronous grouting system, cuts device and particle loaded fluid injection
Device fills in the particle loaded fluid injection device and sets particle loaded fluid, the particle loaded fluid by shield tail synchronous grouting system in native storehouse into
Row filling.
Further, the foam solution includes foaming agent, P1 polymer and water, above-mentioned foaming agent, P1 polymer and water
Volume ratio is 3:5:92.
The injection rate of the foam solution is that amount and dregs inject 350~500L foam solutions per square excavation side.
Install bentonite slurry in bentonite storage tank, the bentonite slurry include water, bentonite, mixing flyash and
Additive, the water:Bentonite:Mix flyash:The weight ratio of additive is 3.5:0.8:1.2:0.05；The weight of cement mortar
Amount is than being cement:Bentonite:Mix flyash:Sand=5:12:18:66.
Further, the mixing flyash includes level-one flyash and second class powered coal ash, wherein level-one flyash and two level
The weight ratio of flyash is 4:6.
A kind of construction method of compound stratum shield sediment improvement construction system, includes the following steps：
S1, foam solution, bentonite slurry and cement mortar are made；
S2, foam solution, bentonite slurry and cement mortar are transported to shield machine；
It replaces in S3, native storehouse, using shield tail synchronous grouting system to carrying out filling particle loaded fluid in native storehouse, and is let out by top ball valve
Water；
S4, pre-grouting carry out stratum consolidation, by the pre-grouting hole in front of shield machine, are carried out using secondary injection pulp grinder advanced
Slip casting selects 1 point and 11 points of pre-grouting hole to carry out slip casting；
S5, it Dewatering well, draws water, when ground is had ready conditions, face water pressure is reduced in cutterhead men working dewatering well；
S6, the cleaning that opens a position, tool changing are drawn water situation according to dewatering well, are checked first Tu Cang before opening a position, and open on native bulkhead
Two ball valves, pounded into native storehouse using reinforcing bar into according to the case where judging to solidify into situation is pounded, if slurries become moulding shape and nothing
Water flows out, then carries out the work that opens a position；
S7, broken rock are abolished hard soil layer rock, the cutter more renewed after abolishing in advance；
S8, restore to promote, the air pressure of 1.5bar will be established in native storehouse, promoted again later.
Injecting paste material is prefabricated steel floral tube in above-mentioned S4, uses triangle cloth hole on the steel floral tube, aperture 6mm,
Spacing between each hole is 8cm；The mixture of filling concrete mortar and cement-sodium silicate double liquid in the steel floral tube, wherein
Cement mortar and the weight ratio of cement-sodium silicate double liquid are 6:4.
It needs to check soil body situation in storehouse after opening a position in above-mentioned S6, multiple using drill rod punching, whether there is or not spewing phenomenons for observation, if
No spewing phenomenon and face situation are stablized, then directly carry out manual cleaning to the soil body in native storehouse, cleaning sequence for from left to right,
From top to bottom.
Compared with prior art, the advantageous effect of present invention is that：
A kind of compound stratum shield sediment improvement construction system of present invention offer and its construction method, knife-changing system is replaced by Tu Cang
Combine with bentonite system and foam injection systems, driving speed can be effectively improved, to carrying out pre-treatment in native storehouse so that
Tool changing operation is simple and efficient, and can quickly carry out blade exchange；And using mixing flyash, can effectively improve cement mortar and
The using effect of bentonite slurry；Meanwhile foam solution is used using foaming agent and P1 mixed with polymers so that unearthed effect obtains
To significantly improving.The construction method of compound stratum shield sediment improvement construction system of the present invention, it is simple and practicable, it is easy for construction,
Soil cabin displacement knife-changing system is added on the basis of water-rich sand layer shield sediment improvement system, is improved driving speed, is ensured driving
Quality, and preferably shield cutter and cutterhead can be protected, reduce maintenance cost.
Description of the drawings
Fig. 1 is that compound stratum shield of the present invention improves construction flow chart；
Fig. 2 is the structural schematic diagram of steel floral tube of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of compound stratum shield sediment improvement construction system, including bentonite system and foam injection system
System further includes Tu Cang displacement knife-changing systems, and the bentonite system includes bentonite stirring system and bentonite injected system；Institute
Bentonite stirring system is stated by pipeline to be connected with the bentonite storage tank of shield machine；The bentonite injected system includes swollen
The native agitator tank of profit and bentonite fermentation tank, the bentonite agitator tank is connected by grout outlet with bentonite fermentation tank, described
It is connected between bentonite storage tank and bentonite fermentation tank and slurry is sent to manage；The foam injection systems include foam pump and foam hair
Raw system, the foam pump coordinate the foam generating system to use, and the foam solution that foam generating system is generated injects institute
It states in the face and native storehouse in front of cutterhead；The Tu Cang displacements knife-changing system includes shield tail synchronous grouting system, cuts device
It with particle loaded fluid injection device, fills in the particle loaded fluid injection device and sets cement mortar, the cement mortar passes through shield tail and synchronizes note
Slurry system in native storehouse to filling.
Foam solution includes foaming agent, P1 polymer and water, and the volume ratio of above-mentioned foaming agent, P1 polymer and water is 3:5:
92；The injection rate of the foam solution is that amount and dregs inject 350~500L foam solutions per square excavation side；By foaming agent and
P1 mixed with polymers uses, and using the excellent greasy property of foam, can effectively reduce cutter head torque, improve driving speed, separately
The outer compressibility having using foam itself also has positive effect to the stabilization of soil pressure.
Install bentonite slurry in bentonite storage tank, the bentonite slurry include water, bentonite, mixing flyash and
Additive, the water:Bentonite:Mix flyash:The weight ratio of additive is 3.5:0.8:1.2:0.05；The weight of cement mortar
Amount is than being cement:Bentonite:Mix flyash:Sand=5:12:18:66；The water of bentonite slurry, bentonite, mixing in the present invention
The weight ratio of flyash and additive and the difference used usually, because of the use of mixing flyash so that various dosages subtract
It is few, it can but reach good improved effect, in addition can reduce the use of bentonite and additive, reduce cost.
It includes level-one flyash and second class powered coal ash, the wherein weight of level-one flyash and second class powered coal ash to mix flyash
Than being 4:6；Level-one flyash is used in combination with second class powered coal ash, finer level-one flyash is deep into mixed liquor,
Second class powered coal ash is used for and various composition mixing, and two-layer effect is using more obvious, after being bentonite slurry and cement mortar
The continuous basis firm using offer.
The construction method of the specific compound stratum shield sediment improvement construction system includes the following steps：
（1）Make foam solution, bentonite slurry and cement mortar；
（2）Foam solution, bentonite slurry and cement mortar are transported to shield machine；
（3）It replaces in native storehouse, using shield tail synchronous grouting system to carrying out filling particle loaded fluid in native storehouse, and is let out by top ball valve
Water；
（4）Pre-grouting carries out stratum consolidation, by the pre-grouting hole in front of shield machine, is carried out using secondary injection pulp grinder advanced
Slip casting selects 1 point and 11 points of pre-grouting hole to carry out slip casting；Risk can effectively be reduced using pre-grouting, carried out soft
Hard special formation preparation of construction down；
（5）Dewatering well draws water, and when ground is had ready conditions, face water pressure is reduced in cutterhead men working dewatering well；
（6）Open a position cleaning, tool changing, is drawn water situation according to dewatering well, is checked first Tu Cang before opening a position, and opens on native bulkhead
Two ball valves, using the reinforcing bar of thickness 10mm pounded into native storehouse into, according to pound into situation judge solidify the case where, if slurries become
For modeling shape and anhydrous outflow, then the work that opens a position is carried out；
（7）Broken rock is abolished hard soil layer rock, the cutter more renewed after abolishing in advance；
（8）Restore to promote, the air pressure of 1.5bar will be established in native storehouse, promoted again later.
Above-mentioned steps（4）Middle injecting paste material is prefabricated steel floral tube, as shown in Fig. 2, using triangle on the steel floral tube
Cloth hole, aperture 6mm, the spacing between each hole are 8cm；Fill slurries in the steel floral tube, the slurries be cement mortar and
The weight ratio of the mixture of cement-sodium silicate double liquid, wherein cement mortar and cement-sodium silicate double liquid is 6:4；It will be prefabricated
Steel floral tube squeeze into pre-grouting hole carry out slip casting, first cement injection, grouting pressure control in 0.3~0.4Mpa, pressure stability
Slip casting is persistently carried out afterwards, until after pressure rises, then 35min is noted, finally note dual slurry sealing of hole.
Specific implementation method, above-mentioned steps（6）The middle native door first opened in people's lock, observes soil body situation in storehouse, uses
Drill rod punching is multiple, and whether there is or not spewing phenomenons for observation, if without spewing phenomenon and face situation stabilization, directly to the soil body in native storehouse
Manual cleaning is carried out, cleaning sequence is from left to right, from top to bottom.It brings down stocks, using device is cut, to cut device and such as raise pick, iron
Spade is manually sent to belt feeder, then be sent to slag-soil truck by belt feeder using knitting bagged soil, during bringing down stocks, retains cutterhead opening
And cement at notch ring, the soil body at cutterhead opening and notch ring is not disturbed as possible, if chisel is crossed in some areas during cutting.
It is blocked immediately with quick-hardening cement, when being cleaned to the ball valve of 9 points, the soil body around ball valve is cleaned out, exhaust fan is connect
To the outside of ball valve, the ventilation in native storehouse is carried out.According to circumstances, it clears up to be blocked to face weak spot, protects on one side
It demonstrate,proves face to stablize, if water exudation is arranged at bottom during bringing down stocks, uses pumping for water pump in time.During bringing down stocks, so as to
It cuts to carry out demolition and replacement to cutter, for being difficult to the cutter installed, first removes, wait for rotating knife after the completion of Tu Cang cleanings
Disk is replaced.
The present invention is applied to upper soft lower hard composite bottom layer shield machine and uses balancing earth-pressure shielding machine, and shield machine is in pre-large post-small
Taper structure design, it is ensured that in the advance ability of each tool wear condition shield machine of certain cutter head；And shield
Machine takes half storehouse gas pressure pattern to promote when passing through upper soft lower hardcore, keeps under-voltage, at the uniform velocity, continuously promotes, strictly to control
Railway and municipal pipeline safety are protected in surface subsidence.
Only presently preferred embodiments of the present invention is explained in detail above, but the present invention is not limited to above-described embodiment,
Within the knowledge of a person skilled in the art, it can also make without departing from the purpose of the present invention each
Kind variation, various change should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of compound stratum shield sediment improvement construction system, it is characterised in that：Including bentonite system, foam injection systems
Knife-changing system is replaced with Tu Cang, the bentonite system includes bentonite stirring system and bentonite injected system；The swelling
Native stirring system is connected by pipeline with the bentonite storage tank of shield machine；The bentonite injected system includes that bentonite stirs
Tank and bentonite fermentation tank are mixed, the bentonite agitator tank is connected by grout outlet with bentonite fermentation tank, the bentonite
It is connected between storage tank and bentonite fermentation tank and slurry is sent to manage；The foam injection systems include foam pump and foam system
System, the foam pump coordinate the foam generating system to use, and the foam solution that foam generating system is generated injects the knife
In face and native storehouse in front of disk；The Tu Cang displacements knife-changing system includes shield tail synchronous grouting system, cuts device and sand
Slurries injection device fills in the particle loaded fluid injection device and sets particle loaded fluid, and the particle loaded fluid passes through shield tail synchronous grouting system pair
It is filled in native storehouse.
2. compound stratum shield sediment improvement construction system according to claim 1, it is characterised in that：The foam solution
Including foaming agent, P1 polymer and water, the volume ratio of foaming agent, P1 polymer and water is 3:5:92.
3. compound stratum shield sediment improvement construction system according to claim 1, it is characterised in that：The foam solution
Injection rate be per square excavation side amount and dregs inject 350~500L foam solutions.
4. compound stratum shield sediment improvement construction system according to claim 1, it is characterised in that：The bentonite is deposited
Bentonite slurry is installed in storage tank, the bentonite slurry includes water, bentonite, mixing flyash and additive, the water:It is swollen
Profit soil:Mix flyash:The weight ratio of additive is 3.5:0.8:1.2:0.05.
5. compound stratum shield sediment improvement construction system according to claim 4, it is characterised in that：The mixing fine coal
Ash includes level-one flyash and second class powered coal ash, and the wherein weight ratio of level-one flyash and second class powered coal ash is 4:6.
6. compound stratum shield sediment improvement construction system according to claim 1, it is characterised in that：The particle loaded fluid is
The weight ratio of the mixture of cement mortar and cement-sodium silicate double liquid, the cement mortar is cement:Bentonite:Mixed powder
Coal ash:Sand=5:12:18:66.
7. a kind of construction method of compound stratum shield sediment improvement construction system, it is characterised in that：Include the following steps：
S1, foam solution, bentonite slurry and cement mortar are made；
S2, by foam solution, bentonite slurry and cement mortar transport to shield machine；
It replaces in S3, native storehouse, using shield tail synchronous grouting system to carrying out particle loaded fluid in native storehouse, and is sluiced by top ball valve；
S4, pre-grouting carry out stratum consolidation, by the pre-grouting hole in front of shield machine, are carried out using secondary injection pulp grinder advanced
Slip casting selects 1 point and 11 points of pre-grouting hole to carry out slip casting；
S5, it Dewatering well, draws water, when ground is had ready conditions, face water pressure is reduced in cutterhead men working dewatering well；
S6, the cleaning that opens a position, tool changing are drawn water situation according to dewatering well, are checked first Tu Cang before opening a position, and open on native bulkhead
Two ball valves, pounded into native storehouse using reinforcing bar into according to the case where judging to solidify into situation is pounded, if slurries become moulding shape and nothing
Water flows out, then carries out the work that opens a position；
S7, broken rock are abolished hard soil layer rock, the cutter more renewed after abolishing in advance；
S8, restore to promote, the air pressure of 1.5bar will be established in native storehouse, promoted again later.
8. the construction method of compound stratum shield sediment improvement construction system according to claim 7, it is characterised in that：S4
Middle injecting paste material is prefabricated steel floral tube, uses triangle cloth hole on the steel floral tube, aperture 6mm, the spacing between each hole
For 8cm；The mixture of filling concrete mortar and cement-sodium silicate double liquid in the steel floral tube, wherein cement mortar and cement-
The weight ratio of waterglass dual slurry is 6:4.
9. the construction method of compound stratum shield sediment improvement construction system according to claim 7, it is characterised in that：S6
In open a position after need check storehouse in soil body situation, using drill rod punch it is multiple, observation whether there is or not spewing phenomenons, if without spewing phenomenon and the palm
Sub- face situation is stablized, then directly carries out manual cleaning to the soil body in native storehouse, and cleaning sequence is from left to right, from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422054.5A CN108643929A (en) | 2018-05-04 | 2018-05-04 | A kind of compound stratum shield sediment improvement construction system and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422054.5A CN108643929A (en) | 2018-05-04 | 2018-05-04 | A kind of compound stratum shield sediment improvement construction system and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108643929A true CN108643929A (en) | 2018-10-12 |
Family
ID=63749464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810422054.5A Pending CN108643929A (en) | 2018-05-04 | 2018-05-04 | A kind of compound stratum shield sediment improvement construction system and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108643929A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611113A (en) * | 2019-01-09 | 2019-04-12 | 康明克斯(北京)环保技术有限公司 | A kind of earth pressure balanced shield, EPBS dregs continuous conveying equipment |
| 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 |
| CN111022064A (en) * | 2020-01-01 | 2020-04-17 | 中铁四局集团有限公司 | Mud sinking prevention and grouting slurry for shield construction |
| CN112282774A (en) * | 2020-09-16 | 2021-01-29 | 中铁十九局集团轨道交通工程有限公司 | Shield notch slurry suitable for sandy water-rich stratum |
| CN113503177A (en) * | 2021-08-25 | 2021-10-15 | 中铁十七局集团有限公司 | In-hole treatment method for liquefiable stratum shield tunnel |
| CN113847047A (en) * | 2021-09-17 | 2021-12-28 | 中铁二十局集团有限公司 | Warehouse opening tool changing method |
| CN115901303A (en) * | 2022-11-14 | 2023-04-04 | 中国水利水电第三工程局有限公司 | Soil pressure balance shield that can simulate improver injection prevents gushing test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052079A (en) * | 2010-11-19 | 2011-05-11 | 中铁一局集团有限公司 | Method for exchanging tool of shield machine for tunnel construction |
| CN105545314A (en) * | 2015-12-24 | 2016-05-04 | 中铁二十二局集团第一工程有限公司 | Construction system and construction method for improving water-enriched sand layer shield waste soil |
| CN105927236A (en) * | 2016-06-03 | 2016-09-07 | 粤水电轨道交通建设有限公司 | Grouting bin filling tool changing method for tunnel shield construction machine |
| CN106761782A (en) * | 2016-12-30 | 2017-05-31 | 中铁二局集团有限公司 | A kind of tunneling construction method for wearing operation tunnel under shield in rich water powder land floor |
| JP2018062760A (en) * | 2016-10-12 | 2018-04-19 | 花王株式会社 | Foam shield construction method |
-
2018
- 2018-05-04 CN CN201810422054.5A patent/CN108643929A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052079A (en) * | 2010-11-19 | 2011-05-11 | 中铁一局集团有限公司 | Method for exchanging tool of shield machine for tunnel construction |
| CN105545314A (en) * | 2015-12-24 | 2016-05-04 | 中铁二十二局集团第一工程有限公司 | Construction system and construction method for improving water-enriched sand layer shield waste soil |
| CN105927236A (en) * | 2016-06-03 | 2016-09-07 | 粤水电轨道交通建设有限公司 | Grouting bin filling tool changing method for tunnel shield construction machine |
| JP2018062760A (en) * | 2016-10-12 | 2018-04-19 | 花王株式会社 | Foam shield construction method |
| CN106761782A (en) * | 2016-12-30 | 2017-05-31 | 中铁二局集团有限公司 | A kind of tunneling construction method for wearing operation tunnel under shield in rich water powder land floor |
Non-Patent Citations (1)
| Title |
|---|
| 工程资料下载: "复合地层盾构施工技术", 《豆丁网豆丁建筑》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611113A (en) * | 2019-01-09 | 2019-04-12 | 康明克斯(北京)环保技术有限公司 | A kind of earth pressure balanced shield, EPBS dregs continuous conveying equipment |
| 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 |
| 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 |
| CN111022064A (en) * | 2020-01-01 | 2020-04-17 | 中铁四局集团有限公司 | Mud sinking prevention and grouting slurry for shield construction |
| CN112282774A (en) * | 2020-09-16 | 2021-01-29 | 中铁十九局集团轨道交通工程有限公司 | Shield notch slurry suitable for sandy water-rich stratum |
| CN113503177A (en) * | 2021-08-25 | 2021-10-15 | 中铁十七局集团有限公司 | In-hole treatment method for liquefiable stratum shield tunnel |
| CN113847047A (en) * | 2021-09-17 | 2021-12-28 | 中铁二十局集团有限公司 | Warehouse opening tool changing method |
| CN115901303A (en) * | 2022-11-14 | 2023-04-04 | 中国水利水电第三工程局有限公司 | Soil pressure balance shield that can simulate improver injection prevents gushing test device |
| CN115901303B (en) * | 2022-11-14 | 2023-09-19 | 中国水利水电第三工程局有限公司 | Soil pressure balance shield blowout prevention test device capable of simulating modifier injection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108643929A (en) | A kind of compound stratum shield sediment improvement construction system and its construction method | |
| CN102052079B (en) | Method for exchanging tool of shield machine for tunnel construction | |
| CN100591866C (en) | Drifting sand layer and gravel stratum water-moving double-liquid high pressure slip-casting water-blocking construction method | |
| CN101509381B (en) | Composite shield structure suitable for complicated stratum construction | |
| CN104265307B (en) | Non-uniform-hardness stratum earth pressure balance shield tunnel underpassing railway existing line construction method | |
| CN105927236B (en) | A kind of tunnel shield machine slip casting is filled in barn cutter replacing method | |
| CN101967978B (en) | Construction method for improving shield soil in composite sand gravel stratum | |
| CN105736004A (en) | Balanced shield mud air-pressure cabin opening pressure maintaining and wall protecting construction method for shield tunneling | |
| CN209195416U (en) | The compound stratum shield Multiple Combination retaining wall ruggedized construction with pressure that opens a position | |
| CN103485336A (en) | Drilling pile drilling construction method of bead-type karst area | |
| CN107842374B (en) | The novel inert slurry of shield and combination grouting process for upper soft lower hard water rich strata | |
| CN105257308B (en) | Native storehouse mortar mixes the shield machine tool changing construction method of bentonite mud film in a kind of layer of sand | |
| CN105484269B (en) | Foundation pit enclosure structure seepage prevention and treatment construction method under blasting condition | |
| KR101421173B1 (en) | Drill Stirrer for the Hard Soil Layers | |
| Li et al. | Creating a working space for modifying and maintaining the cutterhead of a large-diameter slurry shield: A case study of Beijing railway tunnel construction | |
| CN102337732A (en) | Seawall construction method with top pipes penetrating through block stone | |
| CN104594912A (en) | Method for grinding and penetrating through pile groups through shield tunneling machine | |
| CN105221157B (en) | WSS grouting and reinforcings assist gas pressure cutter replacing method in shield tunnel | |
| CN106437796B (en) | A kind of lithostratigraphy shield tunnel end ruggedized construction and reinforcement means | |
| CN112682055B (en) | Small-clear-distance parallel tunnel shield tunneling construction method | |
| KR20100122068A (en) | Grouting method using enlarged concrete consolidation grouting apparatus | |
| CN108868796A (en) | For wearing skyscraper group construction method under the shield sharp radius curve and heavy grade under water-rich sand layer | |
| CN106007639A (en) | Preparation method of high-viscosity thixotropic slurry | |
| CN104631479B (en) | The construction method of the water-stop curtain of soil removal and replacement stirring | |
| JP2020139320A (en) | Shield excavator and shield construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |
|
| RJ01 | Rejection of invention patent application after publication |