CN204646251U - The shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed - Google Patents
The shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed Download PDFInfo
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- CN204646251U CN204646251U CN201520267955.3U CN201520267955U CN204646251U CN 204646251 U CN204646251 U CN 204646251U CN 201520267955 U CN201520267955 U CN 201520267955U CN 204646251 U CN204646251 U CN 204646251U
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- pipe canopy
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- canopy guiding
- shield structure
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Abstract
The utility model relates to the shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed.The stratum consolidation of shield structure export & import in general soil layer more adopts ground high-pressure rotary-spray or ground surface and PVC grouting and reinforcing, for the more difficult control of land pebble stratum consolidation effect.The utility model comprises the glass fiber-reinforced polymer fender post that shield structure well surrounding performs, and has performed pipe canopy guiding wall between stake, and pipe canopy guiding wall is positioned at above shield tunnel arch; Glass fiber-reinforced polymer fender post above shield tunnel arch and pipe canopy guiding are all embedded with longitudinal pipe canopy guiding steel pipe within the walls, and pipe canopy guiding steel pipe equidistantly covers shield tunnel arch scope; From pipe canopy guiding steel pipe, set steel tube shed in stratum, steel tube shed is slip casting steel floral tube.The utility model changes the single reinforcing mode such as conventional tunneling boring ground churning or ground surface and PVC slip casting, not only easy construction, reduces investment outlay, and also greatly reduces termination and reinforces impact on ground, enhances the global reliability of shield structure export & import.
Description
Technical field
the utility model belongs to technical field of tunnel construction, is specifically related to the shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed.
Background technology
21 century is the period that underground construction develops rapidly, and the construction of China's subway engineering was like a raging fire especially especially in recent years.The extensive use of shield structure throughout the country in Different Strata has higher requirement to the reinforcing mode of its export & import ground stabilization.Land pebble stratum shield structure export & import as adopt conventional ground subsidence pressure circle spray reinforcement or surface and PVC grouting and reinforcing, enforcement difficulty is comparatively large, consolidation effect is also difficult to ensure, and the tunneling boring reinforcing mode of routine upright stability after underusing land pebble stratum precipitation, cause very large engineering waste.
Utility model content
The purpose of this utility model is to provide the shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed, changes conventional export & import reinforcing mode, is more suitable for the operating mode that land pebble stratum shield structure export & import is reinforced.
The technical scheme that the utility model adopts is:
A shield end reinforcement system for land pebble stratum super-front large pipe shed, is characterized in that:
Comprise shield structure well termination to punch the shield structure well glass fiber-reinforced polymer fender post that scope inner circumference performs;
Performed pipe canopy guiding wall between the stake of described shield structure well glass fiber-reinforced polymer fender post, pipe canopy guiding wall is positioned at above shield tunnel arch;
In shield structure well glass fiber-reinforced polymer fender post above shield tunnel arch, longitudinal drilling sets pipe canopy guiding steel pipe, and pipe canopy guiding is embedded with longitudinal pipe canopy guiding steel pipe within the walls, and all pipe canopy guiding steel pipe hoops equidistantly cover shield tunnel arch scope;
From pipe canopy guiding steel pipe, set steel tube shed in stratum, steel tube shed is slip casting steel floral tube.
Pipe canopy guiding wall is reinforced concrete cast-in-situ structure, cast-in-place front built-in pipe canopy guiding steel pipe;
The main muscle of pipe canopy guiding wall implants shield structure well glass fiber-reinforced polymer fender post.
Pipe canopy guiding steel tube and tube canopy guiding wall reinforcing bar is fixed, and builds with the pipe canopy wall entirety mould that lead.
On shield structure well glass fiber-reinforced polymer fender post, boring squeezes into pipe canopy guiding steel pipe, effective packing hole internal pore.
The utility model has the following advantages:
The utility model is in land pebble stratum, and shield structure export & import scope adopts glass fiber-reinforced polymer fender post, without the need to manually shifting to an earlier date broken pile; Rationally reserved by station (shield structure well) structure, after agent structure completes substantially, then by the mode that performs binder between stake as pipe canopy guiding wall, implements steel tube shed front pre-grouting strengthening stratum to shield structure interval export & import section arch scope; Simultaneously in conjunction with Dewatering, ensure that the stratum of shield structure export & import is stablized.The utility model takes full advantage of shield structure export & import scope glass fiber-reinforced polymer fender post manually need not shift to an earlier date the features such as upright stability after broken pile, land pebble stratum precipitation is better, change conventional tunneling boring ground churning or the drawback of ground surface and PVC grouting and reinforcing mode in sand-pebble layer, not only reduce engineering risk, save construction investment, also greatly reduce the impact of termination reinforcing on ground simultaneously.
After the utility model formed product, the correlation function requirement of land pebble stratum shield structure export & import ground stabilization can be met, guarantee the construction safety of shield structure export & import, simultaneously less on the impact on ground.So just solve the problem of land pebble stratum shield structure export & import strengthening construction difficulty, weak effect, it all has a wide range of applications at the construction field such as Hydraulic Tunnel, urban subway tunnel.
Accompanying drawing explanation
Fig. 1 is shield structure export & import ground stabilization cross section (plane) schematic diagram.
Fig. 2 is shield structure export & import ground stabilization vertical section (facade) schematic diagram.
In figure, 1-pipe canopy guiding wall, 2-steel tube shed, 3-shield structure well glass fiber-reinforced polymer fender post, 4-pipe canopy guiding steel pipe, waters semi-ring after 5-shield structure well headwall.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is described in detail.
Under the utility model adopts the prerequisite of glass fiber-reinforced polymer fender post based on shield structure export & import scope, AT STATION or after shield structure well construction completes substantially, by performing the mode of binder between stake as pipe canopy guiding wall, steel tube shed front pre-grouting strengthening stratum is implemented to shield structure interval export & import section arch scope; Simultaneously in conjunction with Dewatering, ensure that the stratum of shield structure export & import is stablized.
The shield end reinforcement system of the land pebble stratum super-front large pipe shed that the utility model relates to, comprise shield structure well termination to punch the shield structure well glass fiber-reinforced polymer fender post 3 that scope inner circumference performs, performed pipe canopy guiding wall 1 between shield structure well glass fiber-reinforced polymer fender post 3, pipe canopy guiding wall 1 is positioned at above shield tunnel arch.
In shield structure well glass fiber-reinforced polymer fender post 3 above shield tunnel arch, longitudinal drilling sets pipe canopy guiding steel pipe 4, longitudinal pipe canopy guiding steel pipe 4 is embedded with in pipe canopy guiding wall 1, all pipe canopy guiding steel pipe 4 hoops equidistantly cover shield tunnel arch scope, from pipe canopy guiding steel pipe 4, set steel tube shed 2 in stratum, steel tube shed 2 is slip casting steel floral tube.
Pipe canopy guiding wall 1 is reinforced concrete cast-in-situ structure, cast-in-place front built-in pipe canopy guiding steel pipe 4, and the main muscle of pipe canopy guiding wall 1 implants shield structure well glass fiber-reinforced polymer fender post 3.Pipe canopy guiding steel pipe 4 and pipe canopy wall 1 reinforcing bar that leads is fixed, and builds with the pipe canopy overall mould of wall 1 that leads.On shield structure well glass fiber-reinforced polymer fender post 3, pipe canopy guiding steel pipe 4 is squeezed in boring, and hole internal pore arranges effective packing.
When shield structure well two lining structure is built, headwall all will reserve tunnel shielding portal, tunnel shielding portal arch extend out reserved after water semi-ring 5, perform space for pipe canopy guiding wall 1 provides.
The construction method of above-mentioned land pebble stratum super-front large pipe shed shield end reinforcement system, is characterized in that:
Realized by following steps:
Step one: perform space enclosing structure in shield structure well surrounding, space enclosing structure adopts glass fiber-reinforced polymer fender post 3, afterwards excavation pit, perform station shield structure well agent structure, that waters semi-ring 5 after reserved shield structure well headwall portal and shield structure well headwall performs space;
Step 2: water semi-ring 5 and reserve in scope after shield structure well headwall, pipe canopy guiding wall 1 cell body between glass fiber-reinforced polymer fender post 3 is excavated above shield tunnel arch, be of a size of the wide x of 1000 × 800mm high, the main muscle of pipe canopy guiding wall 1 is implanted in both sides glass fiber-reinforced polymer fender post 3.
Pre-buried longitudinal pipe canopy guiding steel pipe 4, diameter of phi 133mm, wall thickness 4mm, long 1200mm in advance in pipe canopy guiding wall 1 scope, pipe canopy guiding steel pipe 4 and pipe canopy wall 1 reinforcing bar that leads is fixed, and builds with the pipe canopy overall mould of wall 1 that leads.
On shield structure well glass fiber-reinforced polymer fender post 3 after boring, squeeze into pipe canopy guiding steel pipe 4, effective packing is carried out to boring space simultaneously, fixedly secure pipe canopy guiding steel pipe 4.
Pipe canopy guiding steel pipe 4 in shield structure well glass fiber-reinforced polymer fender post 3 and in pipe canopy guiding wall 1 equidistantly covers shield tunnel arch scope.
After pipe canopy guiding wall 1 concrete reaches design strength, in whole pipe canopy guiding steel pipe 4, set steel tube shed 2 to bottom, and Grouting Consolidation.
Pipe canopy guiding steel pipe 4 should strictly be located, and horizontal inclinometer should be adopted often to measure the degree of skewness of pipe canopy, when finding that deviant exceeds designing requirement, should rectify a deviation in time in steel tube shed 2 drilling process; From pipe canopy guiding steel pipe 4 by design boring, during boring, pipe canopy guiding steel pipe 4 is pierced in stratum with drill bit, shut down after reaching projected depth; Drill bit Φ 121 steel pipe being about 150mm, and making at pipe canopy guiding steel pipe 4 one end mouth of pipe welding alloy, drill bit and pipe canopy lead steel pipe 4 and the pipe canopy of steel pipe 4, pipe canopy that lead leads between steel pipe 4 and uses screwed connection.Steel tube shed 2 orifice position is in the outer 200mm location arrangements of shield structure arch excavation contour line, steel pipe hoop center distance 400mm, suitably can adjust according to field geology situation, be as the criterion to ensure that shield machine is appeared smoothly, outer limb about 1 ° ~ 2 °, steel pipe adopts Φ 108mm, the seamless steel pipe of wall thickness 6mm, merogenesis is installed, and steel tube shed 2 merogenesis is: 3m × 2+3m × 2=12m.Grouting serous fluid adopts cement mortar, just intends parameter: cement paste water/binder ratio 0.8:1 ~ 1:1, grouting pressure: adopt 0.2 ~ 0.4MPa, should border geological condition factually in construction, and determines relevant construction parameter by test.
Step 3: after steel tube shed 2 grouting and reinforcing completes, semi-ring 5 reinforcing bar is watered, fixing top semi-ring shield structure steel loop after colligation shield structure well headwall, and by itself and the pre-buried good headwall portal steel ring welding Cheng Huan in bottom, water semi-ring 5 concrete after building shield structure well headwall, shield structure well headwall portal is closed.
Under the shield end reinforcement system of above-mentioned land pebble stratum super-front large pipe shed adopts the prerequisite of glass fiber-reinforced polymer fender post based on shield structure export & import scope, AT STATION or after shield structure well construction completes substantially, by performing the mode of binder between stake as pipe canopy guiding wall, steel tube shed front pre-grouting strengthening stratum is implemented to shield structure interval export & import section arch scope; Simultaneously in conjunction with Dewatering, ensure that the stratum of shield structure export & import is stablized.The utility model takes full advantage of the shield structure export & import scope features such as uprightly stability is better that adopt glass fiber-reinforced polymer fender post need not manually shift to an earlier date after broken pile, land pebble stratum precipitation, land pebble stratum large-scale lead pipe grouting pre-reinforcement and station or shield structure well glass fiber-reinforced polymer fender post are reasonably combined, change the reinforcing mode that conventional tunneling boring ground churning or ground surface and PVC slip casting etc. are single, not only easy construction, to reduce investment outlay, also greatly reduce termination and reinforce impact on ground, enhance the global reliability of shield structure export & import.
Content of the present utility model is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading the utility model manual to any equivalence that technical solutions of the utility model are taked, is claim of the present utility model and contains.
Claims (4)
1. a shield end reinforcement system for land pebble stratum super-front large pipe shed, is characterized in that:
Comprise shield structure well termination to punch shield structure well glass fiber-reinforced polymer fender post (3) that scope inner circumference performs;
Performed pipe canopy guiding wall (1) between fender post (3) stake of described shield structure well glass fiber-reinforced polymer, pipe canopy guiding wall (1) is positioned at above shield tunnel arch;
Shield structure well glass fiber-reinforced polymer fender post (3) interior longitudinal drilling above shield tunnel arch sets pipe canopy guiding steel pipe (4), be embedded with longitudinal pipe canopy guiding steel pipe (4) in pipe canopy guiding wall (1), all pipe canopy guiding steel pipe (4) hoops equidistantly cover shield tunnel arch scope;
From pipe canopy guiding steel pipe (4), set steel tube shed (2) in stratum, steel tube shed (2) is slip casting steel floral tube.
2. the shield end reinforcement system of a kind of land pebble stratum according to claim 1 super-front large pipe shed, is characterized in that:
Pipe canopy guiding wall (1) is reinforced concrete cast-in-situ structure, cast-in-place front built-in pipe canopy guiding steel pipe (4);
The main muscle of pipe canopy guiding wall (1) implants shield structure well glass fiber-reinforced polymer fender post (3).
3. the shield end reinforcement system of a kind of land pebble stratum according to claim 2 super-front large pipe shed, is characterized in that:
Pipe canopy guiding steel pipe (4) is fixed with pipe canopy wall (1) reinforcing bar that leads, and builds with pipe canopy wall (1) the overall mould that leads.
4. the shield end reinforcement system of a kind of land pebble stratum according to claim 3 super-front large pipe shed, is characterized in that:
The upper boring of shield structure well glass fiber-reinforced polymer fender post (3) squeezes into pipe canopy guiding steel pipe (4), effective packing hole internal pore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520267955.3U CN204646251U (en) | 2015-04-29 | 2015-04-29 | The shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520267955.3U CN204646251U (en) | 2015-04-29 | 2015-04-29 | The shield end reinforcement system of a kind of land pebble stratum super-front large pipe shed |
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| CN204646251U true CN204646251U (en) | 2015-09-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106968686A (en) * | 2017-03-28 | 2017-07-21 | 中国五冶集团有限公司 | A kind of pipe shed construction method |
| CN110886614A (en) * | 2019-10-22 | 2020-03-17 | 中交第二航务工程局有限公司 | Construction method for treating upper soft and lower hard stratum by using triple-pipe rotary jet grouting pile |
-
2015
- 2015-04-29 CN CN201520267955.3U patent/CN204646251U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106968686A (en) * | 2017-03-28 | 2017-07-21 | 中国五冶集团有限公司 | A kind of pipe shed construction method |
| CN110886614A (en) * | 2019-10-22 | 2020-03-17 | 中交第二航务工程局有限公司 | Construction method for treating upper soft and lower hard stratum by using triple-pipe rotary jet grouting pile |
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