CN106223976B - Shield well end steel tube shed reinforcement system based on agent structure and its construction method - Google Patents
Shield well end steel tube shed reinforcement system based on agent structure and its construction method Download PDFInfo
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- CN106223976B CN106223976B CN201610865212.5A CN201610865212A CN106223976B CN 106223976 B CN106223976 B CN 106223976B CN 201610865212 A CN201610865212 A CN 201610865212A CN 106223976 B CN106223976 B CN 106223976B
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- headwall
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 107
- 239000010959 steel Substances 0.000 title claims abstract description 107
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 230000002787 reinforcement Effects 0.000 title claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011083 cement mortar Substances 0.000 claims description 19
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000005755 formation reaction Methods 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000004588 polyurethane sealant Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 102000010637 Aquaporins Human genes 0.000 claims description 3
- 108010063290 Aquaporins Proteins 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 230000000368 destabilizing effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000209202 Bromus secalinus Species 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to shield well end steel tube shed reinforcement systems and its construction method based on agent structure.Shield well end stratum consolidation is easily punched by steel tube shed frequently with the steel tube shed mode under precipitation condition, foundation pit enclosure structure, and building enclosure is truncated at the positions Guan Peng, and security risk is big.The present invention includes the shield well agent structure of shield tunnel end, and shield launching portal is reserved on shield well headwall；It is embedded with pipe canopy guide pipe in shield well headwall above shield launching portal, steel tube shed has been set to shield tunnel direction in pipe canopy guide pipe, grouting methol in steel tube shed.Self structure safety when the present invention had both realized shield launching or received is required with surrounding enviroment protection; also it can effectively avoid steel tube shed and set adverse effect to base pit stability in Excavation Process; it also avoids setting that construction precision caused by steel tube shed is poor, disadvantage of stratum consolidation effect difference in shield launching portal, is with a wide range of applications in rich water sand-pebble layer.
Description
Technical field
The invention belongs to Tunnel Engineering technical fields, and in particular to a kind of shield well end steel tube shed based on agent structure
Reinforcement system and its construction method.
Background technology
For the railway traffic engineering of current cities in China, wanted with encryption and the surrounding enviroment protection of subway gauze
The continuous improvement asked, the requirement to construction technology is also higher and higher, one of the heavy difficult point as shield tunnel engineering, shield into
Construction of appearing is always each side's focus of attention, especially under the conditions of special rich water sand-pebble layer.Under normal condition, in base
It cheats in digging process, when excavation of foundation pit depth reaches steel tube shed position, carries out daguanpeng construction, bottom of foundation ditch is steel tube shed
Required workbench is set, since steel tube shed circumferential direction spacing is closeer, foundation pit enclosure structure is faced with the wind punched by steel tube shed
Dangerous, building enclosure is almost truncated at the positions Guan Peng, and when foundation pit continues to excavate downwards, building enclosure bottom loses above pipe canopy
It is reliably connected, the overall stability of foundation pit is unable to get practical guarantee, cannot be satisfied the requirement of foundation pit surrounding enviroment control.
Invention content
The shield well end steel tube shed reinforcement system and its construction that the object of the present invention is to provide a kind of based on agent structure
Method utilizes the guiding wall work that arc is laid above portal pipe canopy guide pipe and shield well headwall are reserved positioned at shield well headwall
With can play good positioning to setting for steel tube shed, be oriented to and supporting role, it is ensured that it is controllable that steel tube shed sets precision, reaches
Best stratum consolidation effect.
The technical solution adopted in the present invention is：
Shield well end steel tube shed reinforcement system based on agent structure, it is characterised in that：
Including shield tunnel and shield well, shield well includes shield shaft bottom plate, the shield well side wall of side and shield well end
Plate in wall and shield well is reserved with shield launching portal on shield well headwall；
Shield well headwall is embedded with pipe canopy guide pipe when pouring, pipe canopy guide pipe is interior to set big pipe to shield tunnel direction
Canopy, grouting methol in steel tube shed.
Arc setting above the shield launching portal that pipe canopy guide pipe and steel tube shed are reserved on shield well headwall；
The pre-buried angle of pipe canopy guide pipe is 1~2 ° with the horizontal direction angle of cut.
Pipe canopy guide pipe both sides are provided with pipe canopy guide pipe spacer bar, pipe canopy guide pipe spacer bar and shield well headwall
Interior main reinforcement effectively connects.
Ring beam is poured after shield launching portal inner wall setting shield well portal, shield tunnel is connected into shield well headwall whole
Body.
Gap pressure injection polyurethane sealant between pipe canopy guide pipe and steel tube shed, end is blocked by cement mortar.
Pipe canopy guide pipe uses the seamless steel pipe of φ 133mm, wall thickness 4mm, length smaller 50mm than shield well headwall thickness；
Steel tube shed grows 10~15m using the steel floral tube of 108 mm of φ, wall thickness 6mm, and trepanning spacing is 200mm on steel floral tube,
Quincuncial arrangement；
Steel tube shed is all made of Q235 steel with pipe canopy guide pipe.
Steel tube shed is arranged within the scope of 120 ° of tunnel arch, circumferential 0.3~0.4m of spacing.
The construction method of shield well end steel tube shed reinforcement system based on agent structure, it is characterised in that：
Include the following steps：
Step 1：Foundation pit enclosure structure construction, base pit dewatering, excavation of foundation pit are carried out, shield shaft bottom plate, shield are then poured into a mould
The permanent structure of well side wall, shield well headwall and plate in shield well, and shield launching portal, portal are reserved on shield well headwall
The interior temporary plugging measure mixed using linked network, spray；
Step 2：In shield well headwall casting process above shield launching portal, built-in pipe canopy guide pipe, pipe canopy is oriented to
Pipe is connect with shield well headwall main reinforcement by spacer bar, and the pre-buried angle of pipe canopy guide pipe is 1~2 ° with the horizontal direction angle of cut, in advance
It is shield well headwall thickness -50mm to bury length, and pre-buried region is 120 ° of tunnel vault both sides range；
Step 3：Scaffold is set up in shield well, interim plank is laid on scaffold, forms the work that steel tube shed is set
Make platform；
Step 4：Guiding wall when shield well headwall is set as pipe canopy is performed according to from centre to both sides, jump hole
Sequence sets steel tube shed；
Step 5：After waiting for that steel tube shed is set, one-way cock is installed in steel tube shed end, from valve to steel tube shed internal pressure
Cement injection, by the quincunx preformed hole on steel tube shed, cement mortar is permeated to surrounding formations, finally to steel tube shed internal pressure water filling
Cement mortar plays the role of blocking nozzle；
Step 6：The one-way cock of steel tube shed end is removed successively, pressure injection is poly- between pipe canopy guide pipe and steel tube shed
Urethane fluid sealant thoroughly blocks leakage aquaporin, finally carries out cement mortar floating processing on shield well headwall surface；
Step 7：After after shield launching or finishing receiving, ring beam is poured after performing shield well portal, by shield tunnel and shield
Structure well headwall connects into an entirety.
The present invention has the following advantages：
Present invention pipe canopy guide pipe pre-buried on shield well headwall, shield well headwall reserve portal above set it is big
The polyurethane sealant etc. of Guan Peng and the cement mortar and cement mortar and sealing of pressure injection in pipe canopy, the steel being related to, cement
It is conventional material that mortar, water-proof concrete and steel tube shed, which set mechanical equipment etc. used,（Equipment）, corresponding size is
General type, manufacture easy to process；And the quantity of pipe canopy guide pipe and steel tube shed and circumferential spacing, merogenesis length and longitudinal overall length
Degree etc. can be adjusted according to condition of construction, and steel tube shed rigidity can be according to the cement mortar grade and steel pipe itself of inside filling
Rigidity situation is adjusted flexibly.By the positioning of pipe canopy guide pipe and shield well headwall with supporting role, it can be achieved that steel tube shed is high-precision
Degree sets requirement, and then realizes ideal stratum consolidation effect, can meet the rigors of surrounding enviroment protection and keep away
Exempt to set destabilizing factor caused by steel tube shed in conventional Excavation Process, there is higher economic benefit and social benefit,
Have wide practical use in the engineerings such as urban track traffic, railway, highway.
Description of the drawings
Fig. 1 is that shield tunnel end well steel tube shed arranges front elevation.
Fig. 2 is that shield tunnel end well steel tube shed arranges sectional view.
Fig. 3 is the B drawings in Fig. 2.
Fig. 4 is pipe canopy guide pipe drawing.
Fig. 5 is pipe canopy guide pipe sectional view.
Fig. 6 is steel tube shed drawing.
In figure, 1- steel tube sheds, 2- pipe canopy guide pipes, 3- shields shaft bottom plate, 4- shield well side walls, plate in 5- shield wells, 6-
Shield well headwall, 7- shield tunnels pour ring beam, 9- pipe canopy guide pipe spacer bars after 8- shield well portals.
Specific implementation mode
The present invention will be described in detail With reference to embodiment.
Shield well end steel tube shed reinforcement system and its construction method of the present invention based on agent structure, provide
A kind of novel steel tube shed advanced supporting construction method enriches existing shield well end stratum consolidation means, has widened shield
Structure export & import stratum consolidation thinking.It is oriented to wall as pipe canopy using shield well headwall built-in pipe canopy guide pipe, by shield well headwall,
Accurate set that steel tube shed can be achieved is protected with good advance support effect, safety when both having realized shield launching or having received
Barrier, also can effectively avoid conventional steel tube shed and implements in Excavation Process, to the adverse effect of base pit stability, while also keeping away
Exempt to set that construction precision caused by steel tube shed is poor, disadvantage of stratum consolidation effect difference in shield launching portal, can meet
Specific construction condition to the rigors of engineering proposal, for ensure to realize engineering proposal rationally, engineering risk and completion time of project can
Control and securely and reliably provides completely new thinking at construction quality.
The built-in pipe canopy guide pipe on shield well headwall, after after shield well agent structure casting complete and reaching design strength
Daguanpeng construction is carried out again, will not be had any impact to base pit stability, and the condition that steel tube shed is set is preferable, steel tube shed
It is more easy to control to set precision, steel tube shed length can require to adjust accordingly according to shield machine length and the protection of periphery structures,
Construction technology has the characteristics that flexible and changeable, adaptable, safe and reliable.
The concrete structure of the above-mentioned shield well end steel tube shed reinforcement system based on agent structure is：
Including shield tunnel 7 and shield well, shield well include the shield shaft bottom plate 3 of bottom, side 4 and of shield well side wall
Plate 5 in shield well headwall 6 and the shield well on top.Shield well headwall 6 is located at the endface of shield tunnel 7, is reserved with shield
It originates（Or it receives）Portal.Pipe canopy guide pipe 2, pipe canopy guide pipe 2 are embedded in shield well headwall 6 above shield launching portal
It is interior to have set steel tube shed 1 to 7 direction of shield tunnel, grouting methol in steel tube shed 1.
Pipe canopy guide pipe 2 and steel tube shed 1 are arranged above shield launching portal along shield launching portal arc, encircle in tunnel
Within the scope of 120 ° of portion, circumferential 0.3~0.4m of spacing.The pre-buried angle of pipe canopy guide pipe 2 is 1~2 ° with the horizontal direction angle of cut.Pipe
2 both sides of canopy guide pipe are provided with pipe canopy guide pipe spacer bar 9, pipe canopy guide pipe spacer bar 9 and the master in shield well headwall 6
Muscle connects.Gap between pipe canopy guide pipe 2 and steel tube shed 1 is provided with polyurethane sealant, and end is blocked by cement mortar.
Pipe canopy guide pipe 2 uses the seamless steel pipe of φ 133mm, wall thickness 4mm, length smaller 50mm than 6 thickness of shield well headwall.
The steel floral tube of 108 mm of the use φ of steel tube shed 1, wall thickness 6mm, grow 10~15m, trepanning spacing is on steel floral tube
200mm, quincuncial arrangement；Steel tube shed 1 is all made of Q235 steel with pipe canopy guide pipe 2.
The length of steel tube shed 1 can suitably be adjusted with angle is set according to formation characteristics and construction monitoring situation, pipe canopy
Guide pipe 2 and quantity, the circumferential spacing of steel tube shed 1 etc. can be adjusted accordingly according to stratum reinforcement criteria, the diameter of steel tube shed 1
It can basis with whether the strength of cement mortar grade of pressure injection and steel tube shed 1 in wall thickness, steel tube shed 1 are inserted into reinforcing bar or shaped steel etc.
Stratum consolidation requires to adjust accordingly.3 one end of steel tube shed is fixed in shield well headwall 6, and the other end is mounted in distal strata
In, a typical simply supported beam primary structure member is formed, infiltration of the cement mortar of pressure injection in steel tube shed 1 to surrounding formations is added,
The mechanics parameter for considerably improving stratum plays the effect of stratum improvement, forms a good Load -carring arch system.
Shield launching portal inner wall pours ring beam 8 after being provided with portal, shield tunnel 7 is connected into shield well headwall 6 whole
Body.
The steel tube shed 1 set above portal is reserved on shield well headwall 6, mainly passes through the built-in pipe on shield well headwall 6
Canopy guide pipe 2, under the guiding of pipe canopy guide pipe 2 and headwall 6, positioning and supporting role, by drilling machine by predetermined direction with pipe
Drilling realizes setting for steel tube shed 1, ultimately forms the steel tube shed stratum consolidation system of particular requirement.
The construction method of the above-mentioned shield well end steel tube shed reinforcement system based on agent structure, includes the following steps：
Step 1：By design requirement, foundation pit enclosure structure construction, base pit dewatering, excavation of foundation pit are carried out, shield is then poured into a mould
Well agent structure, including the permanent structures such as shield shaft bottom plate 3, shield well side wall 4, shield well headwall 6 and plate 5 in shield well, and
Shield launching is reserved on shield well headwall 6（Or it receives）Portal, portal position need to determine with inner diameter size according to design requirement,
It is general be considered as pouring after shield maximum outline excavation and shield well portal it is comprehensive after 8 size of ring beam determine, in portal using linked network,
The mixed temporary plugging measure of spray；
, need to be in shield well agent structure casting complete in order to ensure the implementation result of steel tube shed stratum consolidation system, and reach
It is carried out after to design strength, while the level of ground water on shield well periphery is down to certain distance under structure bottom edge.
Step 2：In 6 casting process of shield well headwall above shield launching portal, need to according to require built-in pipe canopy be oriented to
Pipe 2, pipe canopy guide pipe 2 are connect with 6 main reinforcement of shield well headwall by spacer bar 9,2 pre-buried angle of pipe canopy guide pipe and level side
It it is 1~2 ° to the angle of cut, pre-buried length is smaller 50mm than 6 thickness of shield well headwall, and pre-buried region is 120 ° of tunnel vault both sides range.
Step 3：Scaffold is set up in shield well, interim plank is laid on scaffold, forms what steel tube shed 1 was set
Workbench, workbench height and its horizontal distance between portal, visual workbench width, mechanical type, big pipe
1 merogenesis length of canopy and total length etc. are comprehensive to be determined.
Step 4：Guiding wall when shield well headwall 6 is set as pipe canopy is performed according to from centre to both sides, jump hole
Sequence set steel tube shed 1；Steel tube shed 1 needs strictly to control the drilling direction and angle of drilling machine during setting, and borer drill rod is not
It should occur obviously to contact with pre-buried pipe canopy guide pipe 2, while should be noted that unfavorable shadow of the control drilling vibration to adjacent steel tube shed 1
It rings.
Step 5：One-way cock is installed in 1 end of steel tube shed that sets, from valve into steel tube shed 1 grouting methol, lead to
The quincunx preformed hole on steel tube shed 1 is crossed, cement mortar is permeated to surrounding formations, finally to 1 internal pressure water filling cement mortar of steel tube shed, is risen
To the effect for blocking nozzle；
The cement mortar of pressure injection must have good mobility and workability in steel tube shed 1, it is ensured that filling is closely knit；Steel tube shed
The sealing in aperture must combine close measure with cement mortar using polyurethane sealant, and cement mortar should be with micro-expansibility.
Step 6：The one-way cock of 1 end of steel tube shed is removed successively, when necessary pipe canopy guide pipe 2 and steel tube shed 1 it
Between pressure injection polyurethane sealant, will leakage aquaporin thoroughly block, finally 6 surface of shield well headwall carry out cement mortar floating
Processing.
Step 7：After after shield launching or finishing receiving, ring beam 8 is poured after performing shield well portal, by shield tunnel 7 with
Shield well headwall 6 connects into an entirety.
Theoretically to find out the shield tunnel end well stratum consolidation body of stratum consolidation requirement under the conditions of adapting to arbitrarily
System and its construction method still have sizable difficulty, because of formation condition under the conditions of existing theoretical level and construction technology
It is ever-changing with surrounding enviroment, shield well end stratum consolidation method select must with surrounding enviroment and self structure safely for
Starting point, while it being based on formation characteristics, achieve the purpose that improve formation parameter, improve formation stability.Especially close on it is existing
Object is laid special stress on protecting in subway station and tunnel, underground commerce synthesis, heavy civil engineering and hospital, school and laboratory etc.
In the case of, current shield well end stratum consolidation method still needs in line with adaptation to local conditions, suits the remedy to the case, the base of flexible Application
This principle.
" the shield well end steel tube shed reinforcement system based on agent structure " of the invention is referred mainly to carry by steel tube shed and be imitated
The advance support system that should be formed has steel tube shed quantity, circumferentially disposed adjustable with longitudinal rigidity, passes through pipe canopy guide pipe and shield
The positioning of structure well headwall is with supporting role, it can be achieved that steel tube shed is high-precision to set requirement, and then the ideal stratum consolidation of realization
Effect, can meet surrounding enviroment protection rigors and conventional Excavation Process in set steel tube shed and cause
Destabilizing factor, have higher economic benefit and social benefit, have in the engineerings such as urban track traffic, railway, highway
It is widely applied foreground.
Present disclosure is 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, it is that claim of the invention is covered.
Claims (1)
1. the construction method of the shield well end steel tube shed reinforcement system based on agent structure, it is characterised in that：
Include the following steps：
Step 1：Foundation pit enclosure structure construction, base pit dewatering, excavation of foundation pit are carried out, shield shaft bottom plate is then poured into a mould（3）, shield
Well side wall（4）, shield well headwall（6）With plate in shield well（5）Permanent structure, and in shield well headwall（6）Upper reserved shield
Originate portal, the temporary plugging measure mixed using linked network, spray in portal；
Step 2：The shield well headwall above shield launching portal（6）In casting process, built-in pipe canopy guide pipe（2）, pipe canopy leads
Xiang Guan（2）With shield well headwall（6）Main reinforcement passes through spacer bar（9）Connection, pipe canopy guide pipe（2）Pre-buried angle and horizontal direction
The angle of cut is 1~2 °, and pre-buried length is shield well headwall（6）Thickness -50mm, pre-buried region are 120 ° of tunnel vault both sides range；
Step 3：Scaffold is set up in shield well, interim plank is laid on scaffold, forms steel tube shed（1）The work set
Make platform；
Step 4：By shield well headwall（6）Guiding wall when being set as pipe canopy is performed according to from centre to both sides, jump hole
Sequence sets steel tube shed（1）；
Step 5：Wait for steel tube shed（1）After setting, in steel tube shed（1）One-way cock is installed in end, from valve to steel tube shed
（1）Interior grouting methol, passes through steel tube shed（1）On quincunx preformed hole, cement mortar is permeated to surrounding formations, finally to big pipe
Canopy（1）Internal pressure water filling cement mortar plays the role of blocking nozzle；
Step 6：By steel tube shed（1）The one-way cock of end is removed successively, in pipe canopy guide pipe（2）With steel tube shed（1）Between press
Polyurethane sealant is noted, leakage aquaporin is thoroughly blocked, finally in shield well headwall（6）Surface carries out at cement mortar floating
Reason；
Step 7：After after shield launching or finishing receiving, ring beam is poured after performing shield well portal（8）, by shield tunnel（7）With
Shield well headwall（6）Connect into an entirety.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610865212.5A CN106223976B (en) | 2016-09-30 | 2016-09-30 | Shield well end steel tube shed reinforcement system based on agent structure and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610865212.5A CN106223976B (en) | 2016-09-30 | 2016-09-30 | Shield well end steel tube shed reinforcement system based on agent structure and its construction method |
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| CN106223976A CN106223976A (en) | 2016-12-14 |
| CN106223976B true CN106223976B (en) | 2018-11-09 |
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| CN108678781A (en) * | 2018-06-12 | 2018-10-19 | 中铁二十局集团轨道交通工程有限公司 | One kind closing on river shield launching end stratum consolidation method |
| CN110541722B (en) * | 2019-09-30 | 2024-07-23 | 中铁第四勘察设计院集团有限公司 | Method for locally dismantling shield tunnel segments in middle wind shaft and water stopping structure |
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| CN111441793B (en) * | 2020-03-23 | 2021-09-28 | 中交路桥建设有限公司 | Construction method for subway station headwall in sandy gravel stratum |
| CN114876474B (en) * | 2022-05-26 | 2024-04-30 | 中铁第一勘察设计院集团有限公司 | Construction method for expanding and excavating shield well structure by mine method |
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| CN104806267A (en) * | 2015-04-29 | 2015-07-29 | 中铁第一勘察设计院集团有限公司 | Shield end socket reinforcing system of scree soil layer advance large pipe roof and construction method thereof |
| CN105839643A (en) * | 2016-05-23 | 2016-08-10 | 浙江省交通规划设计研究院 | Tunnel in-hole construction method adopting foundation pit support |
| CN206158753U (en) * | 2016-09-30 | 2017-05-10 | 中铁第一勘察设计院集团有限公司 | Shield constructs well end bassoon canopy system of consolidating based on major structure |
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| CN106223976A (en) | 2016-12-14 |
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