CN110005441A - Pipe-plate lining grouting system and method based on externally embedded type channel Yu extensibility pouch - Google Patents
Pipe-plate lining grouting system and method based on externally embedded type channel Yu extensibility pouch Download PDFInfo
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- CN110005441A CN110005441A CN201910317110.3A CN201910317110A CN110005441A CN 110005441 A CN110005441 A CN 110005441A CN 201910317110 A CN201910317110 A CN 201910317110A CN 110005441 A CN110005441 A CN 110005441A
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- plate lining
- slurries
- grouting
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 126
- 238000009792 diffusion process Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000005755 formation reaction Methods 0.000 claims abstract description 19
- 238000007569 slipcasting Methods 0.000 claims description 41
- 239000004567 concrete Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 8
- 238000007363 ring formation reaction Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000002045 lasting effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 125000004122 cyclic group Chemical group 0.000 abstract description 6
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000002775 capsule Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 final set Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention relates to pipe-plate lining grouting systems and method based on externally embedded type channel Yu extensibility pouch, including the tunnel structure assembled by pipe-plate lining, pipe-plate lining centre is embedded with the injected hole for also serving as hole for hoist, pipe-plate lining extrados is equipped with transverse and longitudinal externally embedded type channel, along section of jurisdiction, circumferential direction is slurries diffusion main channel, it is slurries diffusion subchannel along tunnel longitudinal direction, slurries diffusion main channel is connected with injected hole；Externally embedded type channel uses pre-buried channel flow, and the pouch of high extensibility is equipped in pre-buried channel flow, and the slurries injected by injected hole can only limit in range in pouch to be flowed.The present invention is more significant to the meaning of rich water, big partial size land pebble stratum, it can effectively solve in the case of stratum backbreaks or disturb, the corresponding slurries of conventional grouting process are diluted or are lost in the scall of periphery the drawbacks of by underground water, realize effective filling in shield tail gap three-dimensional cyclic space, ensure that tunnel is effectively contacted with surrounding formations, realizes tunnel structure stabilization and safety of surrounding environment.
Description
Technical field
The invention belongs to Tunnel Engineering technical fields, and in particular to a kind of pipe based on externally embedded type channel Yu extensibility pouch
Sheet built grouting system and method.
Background technique
For the underground tunnel project of current cities in China, due to geological structure and mankind's activity, in stratum
There are the influence of different-grain diameter formation particles and certain pressure underground water, therefore shield driving will form different shape, irregular
The shield tail gap of distribution, the slurries under the conditions of conventional grouting process before grout cures, are easy by ground by behind injection shield tail gap
Be lauched dilution, the underground water that is flowed is taken away and the running pulp of regional area scene, cause slurries to be lost with periphery loosely
Layer, shield tail gap are unable to get effective filling, especially tunnel vault region, become in earth's surface Traffic loading and level of ground water
Under the extraneous factors interference such as dynamic, gradually development forms stratum cavity, stratum to the unfilled localized voids in place of tunnel surrounding upwards
The presence in cavity causes tunnel structure to be on the hazard with formation stability, affects safety of surrounding environment.Surrounding enviroment are protected
It is a big control selector for shield requires extremely harsh city track traffic engineering.Based on formation characteristics and shield method tunnel
The existing slurry injection technique in road is horizontal, and conventional grouting process is unable to satisfy the demand that shield tail gap three-dimensional cyclic space effectively fills, no
It is protected conducive to tunnel structure is stable with Environmental security, is unfavorable for project investment control, as shield tunnel project in all parts of the country is advised
The drawbacks of mould grows stronger day by day, and conventional grouting process is brought also is more and more obvious.
Summary of the invention
The object of the present invention is to provide a kind of pipe-plate lining grouting system based on externally embedded type channel and extensibility pouch and
Method realizes that the big partial size stratum shield tunnel shield tail gap three-dimensional cyclic space of rich water is effectively filled by slurries, utmostly really
It protects between shield tunnel and surrounding formations and effectively contacts, realize that tunnel structure and surrounding formations are stablized, it is ensured that safety of surrounding environment.
The technical scheme adopted by the invention is as follows:
Pipe-plate lining grouting system based on externally embedded type channel Yu extensibility pouch, including the tunnel knot being made of pipe-plate lining
Structure, it is characterised in that:
Pipe-plate lining centre is embedded with the injected hole for also serving as hole for hoist, and pipe-plate lining extrados is logical equipped with transverse and longitudinal externally embedded type
Road, along section of jurisdiction circumferential direction be slurries diffusion main channel, along tunnel longitudinal direction be slurries diffusion subchannel, slurries spread main channel and
Injected hole is connected directly；
Externally embedded type channel uses pre-buried channel flow, and the pouch of high extensibility is equipped in pre-buried channel flow.
It is equipped with plain concrete layer between slip casting bore ends and pre-buried channel flow, is inserted during slip casting using the Grouting Pipe with non-return valve
Enter injected hole, carries out instant slip casting and secondary grouting after breaking plain concrete layer.
Pouch layering is pressed in pre-buried channel flow, interior, and pouch upper surface is not higher than pre-buried channel flow opening height.
When the pipe-plate lining of assembled cyclization deviates from shield tail, shield tail gap is formed between pipe-plate lining and the stratum on periphery；
Shield tail gap while pipe-plate lining deviates from shield tail, filled at the first time by slurries it is closely knit, it is then de- in pipe-plate lining
Out when shield tail, using the further grouting filling of second pulp feeding form.
The pipe-plate lining of tunnel structure includes bind block, the adjacent block of block two sides that binds and the calibrated bolck of rest part,
It is longitudinal spliced after circumferential direction assembling；Ring longitudinal bolt hole and hand hole are designed on every piece of section of jurisdiction, bolt hole is in seam two sides adjacent tubes
It is passed through in the hand hole of sheet built；
Connection is docked in the slurries diffusion main channel of circumferential each adjacent pipe-plate lining, and ring longitudinal direction slurries are spread in main channel and subchannel
After upholding completely, shield tail gap is fully filled under the action of grouting pressure for extensibility pouch.
Pipe-plate lining grouting method based on externally embedded type channel Yu extensibility pouch, it is characterised in that:
The following steps are included:
Step 1: the layering of high extensibility pouch is compressed, is laid in pre-buried channel flow, transverse and longitudinal slurries diffusion admittance quantity is based on
With status requirement, pre-buried channel flow is set on segment die, sufficiently fix by pre-buried channel flow using fixture, meets section of jurisdiction lining
Build the requirement for not being subjected to displacement or deforming during pouring；
Step 2: pre-buried injected hole pours pipe-plate lining, main logical in the slurries diffusion that pipe-plate lining forms transverse and longitudinal distribution behind
Road and slurries spread subchannel；
Step 3: pipe-plate lining is transported to scene, carries out tunnel piercing and pipe sheet assembling, forms shield tunnel lining structure；
Step 4: the pipe-plate lining of assembled cyclization deviates from shield tail, and shield tail gap is formed between pipe-plate lining and surrounding formations；
Step 5: while pipe-plate lining abjection shield tail forms shield tail gap, pass through the Grouting Pipe with grouting stop-valve at the first time
Instant slip casting is carried out, slurries are flowed along slurries diffusion main channel, and during slurries flowing, slurries spread the pouch in main channel
It is gradually expanded, while slurries gradually flow to slurries diffusion subchannel, the pouch in slurries diffusion subchannel is gradually expanded；
Step 6: by lasting slip casting, under the protection and limitation of pouch, slurries can not arbitrarily flow, and can only be limited to pouch
Expanded range in, will not be diluted by underground water, surrounding formations will not be flowed into, more be not in local running pulp phenomenon；
Step 7: with the initial set of slurries, final set, slurry volume is reduced, and carries out secondary grouting in time, it is ensured that limited range
Shield tail gap be fully populated with, the available guarantee of the stability of DRIFT AND SEPARATION-PILE.
Injected hole is synchronized during pipe-plate lining pours using threaded sleeve pre-buried.
Instant slip casting is carried out after breaking plain concrete layer using the Grouting Pipe with non-return valve, maximum grouting pressure should be with tunnel
1.5~2 times of stratum Water And Earth Pressures are controlled at vault, utmostly reduce slip casting disturbance and pouch differentially expanding；
During carrying out instant slip casting or secondary grouting by Grouting Pipe, since slurries diffusion admittance is small in size, it should use
High pressure, intermittent grouting mode are conducive to the abundant expansion of extensibility pouch in slurries diffusion admittance.
The maximum grouting amount control of slurries is at 1.1~1.2 times of theoretical shield tail voidage.
The maximum extension volume of pouch meets the requirement of 2 times of shield tail voidages.
The invention has the following advantages that
The present invention provides a kind of novel shield tunnel shield tail gap three-dimensional cyclic gap grouting system design concepts, enrich
Water rich strata shield tunnel grouting method.Either which kind of stratum, conventional grouting process, which has shield tail structure void, to be obtained
To effective the drawbacks of filling, using section of jurisdiction extrados pre-buried channel flow (slurries diffusion admittance) in such a way that extensibility pouch combines
Slip casting is carried out, filling for the effective range in slurries flowing in a limited space and shield tail gap three-dimensional cyclic gap can be met
It fills out, reaches the target that slurries are not leaked to stratum other than shield tail gap, not only meet tunnel structure safety and wanted with stratum stabilization
It asks, and utmostly reduces slurries grouting amount, saved construction investment.
Shield tunnel segment lining, built-in injected hole, section of jurisdiction extrados pre-buried channel flow and its built-in extensibility pouch, slip casting
Steel, cement slurry, water-proof concrete and the injected hole that pipe and pressure injection slurries etc. are related to block processing mechanical equipment used
Etc. being conventional material (equipment), corresponding size is general type, manufacture easy to process；The arrangement of pre-buried grouting pipe should be with
Section of jurisdiction extrados pre-buried slurries diffusion main channel is corresponding；Along the circumferentially distributed slurries diffusion main channel in section of jurisdiction and along tunnel longitudinal direction
The slurries diffusion subchannel of distribution is, it can be achieved that free-flowing of the slurries in channel, the interior high extensibility capsule being arranged of diffusion admittance
Bag has slurry pressure and acts on the performance freely upheld, and the extension degree of slurries diffusion admittance quantity and pouch should meet shield tail
The demand that gap is fully populated with.And then ensure that pipe-plate lining is contacted with the effective of surrounding formations, realize tunnel structure and stratum
(country rock) sharing lood.Significant increase Inspection of Tunnel Quality and risk management and control are horizontal, have high economic benefit and society
Benefit has wide practical use in the engineerings such as urban track traffic, railway, highway.
Detailed description of the invention
Fig. 1 is pipe-plate lining ring optimal crosssection figure.
Fig. 2 is calibrated bolck front elevation view.
Fig. 3 is calibrated bolck bottom surface expanded view.
Fig. 4 is I-I cross-section diagram (before slip casting).
Fig. 5 is I-I cross-section diagram (after slip casting).
In figure, 1- pipe-plate lining, 2- injected hole, 3- slurries diffusion main channel, 4- slurries diffusion subchannel, 5- built-in groove
Road, 6- pouch, 7- Grouting Pipe, the stratum 8-, 9- shield tail gap, 10- slurries, 11- bolt hole, 12- hand hole.
Specific embodiment
The present invention will be described in detail With reference to embodiment.
The pipe-plate lining grouting system based on externally embedded type channel Yu extensibility pouch that the present invention relates to a kind of, including by section of jurisdiction
The tunnel structure that lining cutting 1 forms, 1 centre of pipe-plate lining is embedded with the injected hole 2 for also serving as hole for hoist, 1 outer arc of pipe-plate lining
Face is equipped with transverse and longitudinal externally embedded type channel, and along section of jurisdiction, circumferential direction is slurries diffusion main channel 3, is slurries diffusion time along tunnel longitudinal direction
Channel 4, slurries diffusion main channel 3 are connected with injected hole 2.The pipe-plate lining 1 of tunnel structure is circumferential include bind block, bind block two
The adjacent block of side and the calibrated bolck of rest part, it is longitudinal spliced after circumferential direction assembling；The slurries of circumferential each adjacent pipe-plate lining 1
It spreads main channel 3 and docks connection, work of the extensibility pouch 6 in grouting pressure in ring longitudinal direction slurries diffusion main channel 3 and subchannel 4
Under, after upholding completely, shield tail gap 9 can be fully filled with.Externally embedded type channel uses pre-buried channel flow 5, sets in pre-buried channel flow 5
There is the pouch 6 of high extensibility, the layering of pouch 6 is pressed in pre-buried channel flow 5.
Slurries spread the arrangement of main channel 3 and the quantity of slurries diffusion subchannel 4, are based on after the sufficiently expansion of pouch 6 effectively
Coverage area unanimously accounts for.
Certain thickness plain concrete layer is equipped between 2 end of injected hole and pre-buried channel flow 5, using band check during slip casting
The Grouting Pipe 7 of valve is inserted into injected hole 2, carries out instant slip casting after breaking plain concrete layer.
When the pipe-plate lining 1 of assembled cyclization deviates from shield tail, shield tail is formd between the stratum 8 on pipe-plate lining 1 and periphery
Gap 9, space are fully populated with by slurries 10.
The pipe-plate lining grouting method based on externally embedded type channel Yu extensibility pouch based on above structure, including following step
It is rapid:
Step 1: the layering of high extensibility pouch 6 is compressed, is laid in pre-buried channel flow 5, transverse and longitudinal slurries diffusion admittance number is based on
Pre-buried channel flow 5 is arranged on segment die, is sufficiently fixed pre-buried channel flow 5 using fixture for amount and status requirement, meets pipe
The requirement that sheet built 1 is not subjected to displacement or deforms during pouring；
Step 2: pre-buried injected hole 2 pours pipe-plate lining 1, forms the slurries diffusion of transverse and longitudinal distribution behind in pipe-plate lining 1
Main channel 3 and slurries spread subchannel 4；
Step 3: pipe-plate lining 1 is transported to scene, carries out tunnel piercing and pipe sheet assembling, forms shield tunnel lining structure；
Step 4: the pipe-plate lining 1 of assembled cyclization deviates from shield tail, and shield tail gap is formed between pipe-plate lining 1 and surrounding formations 8
9；
Step 5: while forming shield tail gap 9 after pipe-plate lining 1 deviates from shield tail, pass through the note with grouting stop-valve at the first time
Slurry pipe 7 carries out instant slip casting, and slurries 10 are flowed along slurries diffusion main channel 3, and in 10 flow process of slurries, slurries diffusion is main logical
Pouch 6 in road 3 is gradually expanded, while slurries gradually flow to slurries diffusion subchannel 4, and slurries spread the capsule in subchannel 4
Bag 6 is gradually expanded；
Step 6: by lasting slip casting, under the protection and limitation of pouch 6, slurries 10 can not arbitrarily flow, and can only be limited to capsule
Flowing, will not be diluted by underground water, will not flow into surrounding formations in the expanded range of bag 6, more be not in that local running pulp is existing
As；
Step 7: with the initial set of slurries 10, final set, slurry volume is reduced, and carries out secondary grouting in time, it is ensured that limited model
The shield tail gap 9 enclosed is fully populated with, the available guarantee of the stability of DRIFT AND SEPARATION-PILE 8.
Injected hole 2 is synchronized during pipe-plate lining 1 pours using threaded sleeve pre-buried.
It is equipped with plain concrete layer between 2 end of injected hole and pre-buried channel flow 5, the Grouting Pipe with non-return valve is used during slip casting
7 insertion injected holes 2, carry out instant slip casting after breaking plain concrete layer.
The injection of slurries 10 is controlled with grouting amount and grouting pressure double standards, and maximum grouting amount control is in theoretical shield
1.1~1.2 times of 9 volume of tail gap, final grouting pressure are reference with stratum Water And Earth Pressures numerical value.The extensibility of pouch 6 needs full
The needs gradually expanded under the effect of sufficient grouting pressure, while pouch 6 is most in slurries diffusion main channel 3 and slurries diffusion subchannel 4
Big bulked volume should at least meet the requirement of 2 times of 9 volumes of shield tail gap.
Maximum grouting pressure should be controlled with 1.5~2 times of stratum Water And Earth Pressures at tunnel vault, utmostly be reduced
Slip casting disturbance and pouch differentially expanding.
During carrying out instant slip casting or secondary grouting by Grouting Pipe 7, since slurries diffusion admittance is small in size, answer
Using high pressure, intermittent grouting mode, be conducive to the abundant expansion of extensibility pouch 6 in slurries diffusion admittance.
The mobility of slurries 10 and presetting period need to meet pouch 6 in main channel and subchannel and are gradually filled, expanded
, and the demand in shield tail gap 9 is filled up, while the localized voids that grout cures, volume contraction are formed, it is carried out by Grouting Pipe 7
Secondary grouting.
Further detailed description is done referring to Fig. 1-5 pairs of structural systems of the invention:
Be prefbricated tunnel lining structure the system comprises the tunnel structure being made of shield tunnel segment lining 1, every endless tube piece by
Several pieces of pipe sheet assemblings form, it is however generally that can according to calibrated bolck+adjacent block+form for the block that binds is combined, every piece of section of jurisdiction
Centre is equipped with injected hole 2, while having both tunnel segment hanging hole function, and injected hole 2 is generally adopted during pipe-plate lining 1 pours
It is synchronized with threaded sleeve pre-buried.Section of jurisdiction extrados is equipped with pre-buried channel flow 5, forms circumferential slurries diffusion main channel 3 and longitudinal direction
Slurries spread subchannel 4, and conduit embeds the pouch 6 of high extensibility, and slurries are by pre-buried injected hole 2 and with the slip casting of non-return valve
Pipe 7 persistently injects.5 close alignment of pre-buried channel flow of injected hole 2 and the setting of section of jurisdiction extrados.Include the built-in groove including pouch 6
Road 5, the injected hole 2 with non-return valve and pipe-plate lining synchronize pour.Transverse and longitudinal slurries diffusion admittance size, quantity, with capsule
The volume and extension performance of bag need to meet the needs of 9 three-dimensional cyclic gap of shield tail gap is effectively filled, and meet tunnel structure
Whole stress and formation stability requirement.On the one hand 5 inside headroom size of pre-buried channel flow needs to meet layering is pressed in channel
Pouch 6 needs, and is on the other hand also required to meet 1 structure stress needs of pipe-plate lining that (6 apparent height of pouch is slightly below conduit 5 and opens
Open height), cannot have to 1 structural strength of pipe-plate lining and obviously weaken the influence.Comprising the pre-buried channel flow 5 including pouch 6 in section of jurisdiction
It is effectively fixed on mold, synchronizes and pour in pipe-plate lining 1.
Under the limitation of pre-buried channel flow 5 and pouch 6, flow range of the slurries 10 in shield tail gap 9 suffers restraints, simultaneously
10 characteristic of slurries will not be influenced by periphery underground water is diluted, and the setting time of slurries 10 is controllable (with laboratory test situation base
This is consistent), it can ensure that effectively contacting between stratum 8 and pipe-plate lining 1 substantially, meet tunnel structure and stratum is stablized, realize
Surrounding enviroment protect target.
There are the plain concretes of 10mm thickness or so between pre-buried injected hole 2 and extrados pre-buried channel flow 5 in pipe-plate lining 1
Layer needs to meet the stability of the position before slip casting on the outside under the effect of 8 Water And Earth Pressures of stratum, while being also required to meet the slip casting phase
Between, Grouting Pipe 7 carries out instant slip casting after conveniently breaking, it is ensured that slurries 10 can smoothly enter into pouch 6.Pre-buried 2 other end of injected hole with
Shield tunnel synchronous grouting system is connected directly, and is deviate from the first time of shield tail in pipe-plate lining 1, is carried out instant slip casting.
The influence of volume contraction after slurries 10 solidify can carry out secondary grouting by injected hole 2, and then ensure shield tail gap
9 are completely filled in, it is ensured that the stability of pipe-plate lining 1 and stratum 8, and then ensure safety of surrounding environment.
The injection of slurries 10 is executed with grouting amount and grouting pressure double control standard, and maximum grouting amount control is in theoretical shield
1.1~1.2 times of tail gap, final grouting pressure are reference with stratum Water And Earth Pressures.
Specific construction step are as follows:
Step 1: according to design requirement, the layering of pouch 6 is compressed, is laid in conduit, transverse and longitudinal slurries diffusion admittance number is based on
Amount and status requirement, according to the direction of transverse and longitudinal slurries diffusion admittance and quantity pre-buried channel flow 5 on segment die, using fixture
Pre-buried channel flow 5 is sufficiently fixed, the requirement for not being subjected to displacement or deforming during pipe-plate lining 1 pours is met；
Step 2: pouring pipe-plate lining 1 by duct pieces of shield tunnel production precision and structure durability requirement, pre-buried injected hole 2,
Slurries diffusion main channel and the subchannel of transverse and longitudinal distribution are formed behind in pipe-plate lining 1；
Step 3: arrangement and live schedule requirement are raised according to work, pipe-plate lining 1 is transported to scene, carries out tunnel piercing and section of jurisdiction
Assembly forms shield tunnel liner structure；
Step 4: the pipe-plate lining 1 of assembled cyclization deviates from shield tail, and shield tail gap is formed between pipe-plate lining 1 and surrounding formations 8
9；
Step 5: while pipe-plate lining 1 deviates from shield tail and forms shield tail gap 9, pass through the slip casting with grouting stop-valve at the first time
Pipe 7 carries out instant slip casting, and slurries 10 are flowed along diffusion main channel 3, in 10 flow process of slip casting, 6 quilt of pouch in main channel
It gradually expands, while slurries gradually flow to time diffusion admittance, the pouch 6 in secondary diffusion admittance is gradually expanded；
Step 6: by lasting slip casting, slurries 10 are by injection shield tail gap 9, under the protection and limitation of pouch 6,10 nothing of slurries
Method arbitrarily flows, and can only be limited to flowing in the expanded range of pouch 6, will not be diluted, will not be flowed into circumferentially by underground water
Layer, is more not in local running pulp phenomenon；
Step 7: with the initial set of slurries 10, final set, slurry volume is reduced, and carries out two in time according to slurry material attribute
Secondary slip casting, it can be ensured that the shield tail gap 9 of limited range is fully populated with, the available guarantee of the stability of DRIFT AND SEPARATION-PILE 8.
The shield tail gap 9 formed during shield tunnel driving is often formed since shield turning or stratum are backbreak
The gap of irregular distribution, concurrently injected slurries can be taken away by the underground water that underground water is sparse or is flowed, and add slip casting
Pressure is unevenly distributed weighing apparatus, can further disturb 9 surrounding formations of shield tail gap during slip casting, so can aggravate slurries loss or
Running pulp scene, these can all cause this limited three-dimensional space of shield tail gap 9 to be unable to get effective filling, and pass through extensibility
The timely injection of slurries 10 in pouch 6, it is ensured that this confined space of shield tail gap 9 is full of in time, it is ensured that pipe-plate lining 1 is carried on the back
Closely knit afterwards, tunnel structure and surrounding formations 8 are stablized.
It tunnels to form different shape, the shield tail of irregular distribution building in rich water, big grain size pebble layer shield tunnel
Gap, slurries inject behind shield tail gap by underground water dilution, the underground water flowed are taken away, Local Layer is loose or region of backbreaking
Phenomena such as slurries leak is more universal, and the slurries diffusion admittance and extensibility pouch formed using pre-buried channel flow is defined range
Slip casting, it can be achieved that shield tail gap limits effective filling in range, and then ensure that shield tail gap is full of by slurries, realize tunnel
Effective contact between structure and stratum (country rock).
Shield tunnel driving, pipe sheet assembling and mortar depositing construction etc. are all common process, related pipe-plate lining and other
Auxiliary equipment is all conventional machinery arrangement；Reinforcing bar that pre-buried channel flow 5, extensibility pouch 6 and slip casting use, water-proof concrete,
Steel form, waterproof material, Grouting Pipe 7 etc. are conventional material, and steel bar stress is general using three-level anti-seismic steel bar, water-proof concrete
Using P10 or P12, steel form uses Q235 steel；The pre-buried channel flow of 1 extrados of pipe-plate lining setting uses high hardness and corrosion resistance
Rubber material, embedded extensibility head use high resiliency PVC material.
Shield tunnel tunnel during be related to pipe-plate lining (C50 waterproof reinforced concrete), seam waterproof material (EPDM
EPDM), segment bolt (M30) and injecting paste material (single liquid cement slurry) are common process and conventional material, and pipe-plate lining pours
Pre-buried injected hole 2 is with casing using pvc pipe during building.
Flowing and filling of the slurries 10 in transverse and longitudinal diffusion admittance and extensibility pouch 6, can not be by groundwater pressure
Influence, while will not effectively be filled to 8 running pulp of surrounding formations, utmostly realize slurries in 8 range of shield tail gap 10
It fills out, while grouting amount that can also utmostly on realization theory, not only may be implemented between pipe-plate lining 1 and surrounding formations 8
It is closely connected, it realizes the stabilization of stratum 8 and safety of surrounding environment, can also utmostly save grouting amount, cost saving.
The contents of the present invention are not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And to any equivalent transformation that technical solution of the present invention is taken, all are covered by the claims of the invention.
Claims (10)
1. the pipe-plate lining grouting system based on externally embedded type channel Yu extensibility pouch, including the tunnel being made of pipe-plate lining (1)
Road structure, it is characterised in that:
Pipe-plate lining (1) centre is embedded with the injected hole (2) for also serving as hole for hoist, and pipe-plate lining (1) extrados is equipped with transverse and longitudinal
To externally embedded type channel, it is slurries diffusion subchannel (4) along tunnel longitudinal direction that along section of jurisdiction, circumferential direction, which is slurries diffusion main channel (3),
Slurries diffusion main channel (3) is connected directly with injected hole (2)；
Externally embedded type channel uses pre-buried channel flow (5), and the pouch (6) of high extensibility is equipped in pre-buried channel flow (5).
2. the pipe-plate lining grouting system according to claim 1 based on externally embedded type channel Yu extensibility pouch, feature
It is:
It is equipped with plain concrete layer between injected hole (2) end and pre-buried channel flow (5), the Grouting Pipe with non-return valve is used during slip casting
(7) injected hole (2) are inserted into, carry out instant slip casting and secondary grouting after breaking plain concrete layer.
3. the pipe-plate lining grouting system according to claim 2 based on externally embedded type channel Yu extensibility pouch, feature
It is:
Pouch (6) layering is pressed in pre-buried channel flow (5), interior, and pouch (6) upper surface is not higher than pre-buried channel flow (5) opening height.
4. the pipe-plate lining grouting system according to claim 3 based on externally embedded type channel Yu extensibility pouch, feature
It is:
When the pipe-plate lining (1) of assembled cyclization deviates from shield tail, shield tail is formed between the stratum (8) on pipe-plate lining (1) and periphery
Gap (9)；
Shield tail gap (9) is closely knit by slurries (10) filling at the first time while pipe-plate lining (1) deviates from shield tail, then exists
When pipe-plate lining (1) deviates from shield tail, using the further grouting filling of second pulp feeding form.
5. the pipe-plate lining grouting system according to claim 4 based on externally embedded type channel Yu extensibility pouch, feature
It is:
The pipe-plate lining (1) of tunnel structure includes bind block, the adjacent block of block two sides that binds and the calibrated bolck of rest part,
It is longitudinal spliced after circumferential direction assembling；Ring longitudinal bolt hole (11) and hand hole (12) are designed on every piece of section of jurisdiction, bolt hole (11) is connecing
It is passed through in the hand hole (12) of the adjacent pipe-plate lining (1) in seam two sides；
Connection is docked in slurries diffusion main channel (3) of circumferential each adjacent pipe-plate lining (1), and ring longitudinal direction slurries spread main channel (3)
With the interior extensibility pouch (6) of subchannel (4) under the action of grouting pressure, after upholding completely, shield tail gap (9) are filled out completely
It is full.
6. the pipe-plate lining grouting method based on externally embedded type channel Yu extensibility pouch, it is characterised in that:
The following steps are included:
Step 1: the layering of high extensibility pouch (6) being compressed, is laid in pre-buried channel flow (5), logical based on the diffusion of transverse and longitudinal slurries
Pre-buried channel flow (5) are arranged on segment die in road quantity and status requirement, using fixture that pre-buried channel flow (5) progress is sufficiently solid
It is fixed, meet the requirement for not being subjected to displacement or deforming during pipe-plate lining (1) pours；
Step 2: pre-buried injected hole (2) pours pipe-plate lining (1), forms the slurry of transverse and longitudinal distribution behind in pipe-plate lining (1)
Liquid spreads main channel (3) and slurries diffusion subchannel (4)；
Step 3: pipe-plate lining (1) is transported to scene, carries out tunnel piercing and pipe sheet assembling, forms shield tunnel lining structure；
Step 4: the pipe-plate lining (1) of assembled cyclization deviates from shield tail, forms shield between pipe-plate lining (1) and surrounding formations (8)
Tail gap (9)；
Step 5: while pipe-plate lining (1) abjection shield tail forms shield tail gap (9), at the first time by with grouting stop-valve
Grouting Pipe (7) carries out instant slip casting, and slurries (10) are flowed along slurries diffusion main channel (3), in slurries (10) flow process, slurry
Pouch (6) in liquid diffusion main channel (3) is gradually expanded, while slurries gradually flow to slurries diffusion subchannel (4), and slurries expand
The pouch (6) dissipated in subchannel (4) is gradually expanded；
Step 6: by lasting slip casting, under the protection and limitation of pouch (6), slurries (10) can not arbitrarily flow, and can only limit
It in the expanded range of pouch (6), will not be diluted by underground water, surrounding formations will not be flowed into, more be not in local running pulp
Phenomenon；
Step 7: with the initial set of slurries (10), final set, slurry volume is reduced, and carries out secondary grouting in time, it is ensured that limited
The shield tail gap (9) of range is fully populated with, the available guarantee of stability of DRIFT AND SEPARATION-PILE (8).
7. the pipe-plate lining grouting method according to claim 6 based on externally embedded type channel Yu extensibility pouch, feature
It is:
Injected hole (2) is synchronized during pipe-plate lining (1) pours using threaded sleeve pre-buried.
8. the pipe-plate lining grouting method according to claim 7 based on externally embedded type channel Yu extensibility pouch, feature
It is:
Instant slip casting is carried out after breaking plain concrete layer using the Grouting Pipe (7) with non-return valve, maximum grouting pressure should be with tunnel
1.5~2 times of stratum Water And Earth Pressures are controlled at vault, utmostly reduce slip casting disturbance and pouch differentially expanding；
During carrying out instant slip casting or secondary grouting by Grouting Pipe (7), since slurries diffusion admittance is small in size, it should adopt
With high pressure, intermittent grouting mode, be conducive to the abundant expansion of extensibility pouch (6) in slurries diffusion admittance.
9. the pipe-plate lining grouting method according to claim 8 based on externally embedded type channel Yu extensibility pouch, feature
It is:
The maximum grouting amount control of slurries (10) is at 1.1~1.2 times of theoretical shield tail gap (9) volume.
10. the pipe-plate lining grouting method according to claim 9 based on externally embedded type channel Yu extensibility pouch, feature
It is:
The maximum extension volume of pouch (6) meets the requirement of 2 times of shield tail gap (9) volumes.
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| CN201910317110.3A CN110005441B (en) | 2019-04-19 | 2019-04-19 | Segment lining grouting system and method based on externally embedded channel and stretchable bag |
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| CN113802570A (en) * | 2021-08-30 | 2021-12-17 | 北京工业大学 | Circular foundation ditch steel corrugated plate-mould bag concrete supporting structure |
| CN114776323A (en) * | 2022-04-01 | 2022-07-22 | 成都未来智隧科技有限公司 | Method for controlling double compensation of stratum and stress loss of shield tunnel |
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