CN107013219A - Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel - Google Patents
Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel Download PDFInfo
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- CN107013219A CN107013219A CN201610057115.3A CN201610057115A CN107013219A CN 107013219 A CN107013219 A CN 107013219A CN 201610057115 A CN201610057115 A CN 201610057115A CN 107013219 A CN107013219 A CN 107013219A
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- shed
- advanced support
- pipe
- tunnel
- pipe advanced
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009412 basement excavation Methods 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 6
- 238000005755 formation reaction Methods 0.000 description 16
- 239000011435 rock Substances 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 210000004911 serous fluid Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention belongs to the method that Shed-pipe Advanced Support above shield tunnel technical field, more particularly to a kind of shield tunnel isolates boulder group, it is characterised in that follow the steps below：（1）Shield is shut down, and Shed-pipe Advanced Support hole is applied along above tunnel excavation contour line by cutterhead opening；（2）Using rapid hardening high pressure concrete into the Shed-pipe Advanced Support hole rotary jet grouting, until the Shed-pipe Advanced Support hole stream slurry after, stop mud jacking；（3）Described in repeat step（1）、（2）Until each 30 °~90 ° of tunnel center both sides, scope is all finished；（4）Top boulder group is isolated into the pipe of concrete canopy of 60 °~180 ° scopes with center in tunnel upper formation；（5）The tunnel construction sections of boulder group above shield driving, safety.The present invention is for boulder group above shield tunnel, by pre-grouting one pipe canopy of formation, solves boulder group in the soil body of shield tunnel top and sink or subsidence problems, shield is passed through the boulder group of tunnel upper.
Description
Technical field
The invention belongs to the method that Shed-pipe Advanced Support above shield tunnel technical field, more particularly to a kind of shield tunnel isolates boulder group.
Background technology
With the development of modern city building and traffic communal facility, the land resource day in city is becoming tight, and city ground transport can not meet traffic requirement.In order to save urban land resource, alleviate urban public transport pressure, the underground space for expanding city is imperative, build the underground transportation facilities such as subway, Urban Underground vcehicular tunnel tool and be of great significance.Shield tunnel construction method refers to use shield machine, the unstability while control excavation face and country rock do not cave in, while carrying out tunnel piercing, slagging tap, and segment assembly forms lining cutting, implements grouting behind shaft or drift lining in machine, the method for not disturbing country rock and building tunnel, it is a kind of Fully-mechanized construction method in shallow mining method.
During China's South China's shield tunnel construction, it is usually present completely decomposed stratum, substantial amounts of boulder is usually contained in completely decomposed stratum, boulder has the characteristics of quality is hard, rock core is complete, intensity is high, some boulders are present in shield tunnel, some exist above shield tunnel some boulders, influence the excavation progress in tunnel.Being present in the boulder group in shield tunnel can be handled during tunnel excavation；The boulder group being present in above shield tunnel is not disposable during tunnel excavation, when the soil layer construction above tunneling is loose, and boulder group, which is easily produced, sink or sinkage, hinders the smooth construction of shield tunnel.Therefore, it is necessary to work out a kind of novel construction method, solve boulder group above shield tunnel and sink or subsidence problems, shield is passed through the boulder group of tunnel upper, ensure the smooth construction of shield tunnel.
The content of the invention
The present invention is directed to above-mentioned technical problem, isolate the method for boulder group there is provided Shed-pipe Advanced Support above a kind of shield tunnel, solve boulder group above shield tunnel to sink or subsidence problems, shield is passed through the boulder group of tunnel upper, ensure the smooth construction of shield tunnel.
The technical solution adopted in the present invention is：
Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, it is characterised in that follow the steps below：
（1）Shield is shut down, and Shed-pipe Advanced Support hole is applied along above tunnel excavation contour line by cutterhead opening；
（2）Using rapid hardening high pressure concrete into the Shed-pipe Advanced Support hole rotary jet grouting, until the Shed-pipe Advanced Support hole stream slurry after, stop mud jacking；
（3）Described in repeat step（1）、（2）Until each 30 °~90 ° of tunnel center both sides, scope is all finished；
（4）Top boulder group is isolated into the pipe of concrete canopy of 60 °~180 ° scopes with center in tunnel upper formation；
（5）The tunnel construction sections of boulder group above shield driving, safety.
The step（1）In, the outer limb in the Shed-pipe Advanced Support hole does not invade tunnel excavation contour line.
The step（1）In, the hole depth≤10m in the Shed-pipe Advanced Support hole.
The step（1）In, the more excellent hole depth in the Shed-pipe Advanced Support hole is 5~10m, to be preferred more than 1~2m of boulder anterior position.
The step（1）In, a diameter of 80~120mm in the Shed-pipe Advanced Support hole.
The step（1）In, the line of the Shed-pipe Advanced Support hole hole heart is domed, and the hole in adjacent Shed-pipe Advanced Support hole is in the heart away from for 0.5m.
The step（1）In, the drilling sequences in Shed-pipe Advanced Support hole are carried out from high hole position to low hole position.
The step（3）In, each 60 ° of tunnel center both sides are more excellent scope.
The step（4）In, pipe of concrete canopy is formed with center into 120 ° as more excellent scope in tunnel upper.
Beneficial effects of the present invention are：
1st, the present invention is for boulder group above shield tunnel, by pre-grouting one pipe canopy of formation, solves boulder group in the soil body of shield tunnel top and sink or subsidence problems, shield is passed through the boulder group of tunnel upper, ensure the smooth construction of shield tunnel；
2nd, the pipe of concrete canopy formation supporting construction in the present invention, the pipe canopy constructed in advance is isolated into support with the support of front of tunnel heading unconsolidated formation and boulder group, forms the shell-like structure around tunnel profile top, effectively suppresses stratum and loosen and collapse；
3rd, the line of the Shed-pipe Advanced Support hole hole heart is domed, pipe of concrete canopy formation arching, bears great efforts, support strength is high；
4th, reinforcing basement effect is generated：Grouting serous fluid enters in stratum and crack through Shed-pipe Advanced Support pore pressure, makes scall or rock mass is cementing, consolidation, so as to improve the physico-mechanical properties on stratum, enhance stratum from ability to bear, reached the purpose of reinforcing pipe canopy surrounding formations；
5th, construction safety is ensured：Pipe shed support rigidity is larger, and loose soil layer and boulder collapse on pipe canopy during shield driving, plays buffering and buffer action, it is therefore prevented that boulder extruding shield, card shield even damage cutterhead in tunneling process, have been greatly reduced range of disturbance and surface subsidence.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the construction schematic diagram in Shed-pipe Advanced Support hole in the present invention.
Fig. 3 is the structural representation of pipe canopy in the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
In figure, 1- boulders, the 2- waters surface, 3- pipe canopies, 4- shield machines, 5- sections of jurisdiction, 6- tunnel excavation contour lines, 7- Shed-pipe Advanced Supports hole, 8- pipe canopies.
Embodiment 1
As Figure 1-3, Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, follows the steps below：
（1）Shield is shut down; Shed-pipe Advanced Support hole 7 is applied along the top of tunnel excavation contour line 6 by cutterhead opening; the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6; hole depth≤the 10m in Shed-pipe Advanced Support hole 7 and more than the anterior position 1m of boulder 1; a diameter of 80mm in Shed-pipe Advanced Support hole 7; the line of the hole heart of Shed-pipe Advanced Support hole 7 is domed, and the hole in adjacent Shed-pipe Advanced Support hole 7 is carried out away from the drilling sequences for 0.5m, Shed-pipe Advanced Support hole 7 from high hole position to low hole position in the heart；
（2）Using rapid hardening high pressure concrete into Shed-pipe Advanced Support hole 7 rotary jet grouting, until Shed-pipe Advanced Support hole 7 stream slurry after, stop mud jacking；
（3）Repeat step（1）、（2）Until tunnel center both sides, each 30 ° of scopes are all finished；
（4）Top boulder group is isolated into the pipe of concrete canopy 8 of 60 ° of scopes with center in tunnel upper formation；
（5）The tunnel construction sections of boulder group above shield driving, safety.
Wherein, step（1）In, it is the smaller the better that the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6.
Embodiment 2
As Figure 1-3, Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, follows the steps below：
（1）Shield is shut down; Shed-pipe Advanced Support hole 7 is applied along the top of tunnel excavation contour line 6 by cutterhead opening; the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6; the hole depth in Shed-pipe Advanced Support hole 7 is 5m and more than the anterior position 1.2m of boulder 1; a diameter of 90mm in Shed-pipe Advanced Support hole 7; the line of the hole heart of Shed-pipe Advanced Support hole 7 is domed, and the hole in adjacent Shed-pipe Advanced Support hole 7 is carried out away from the drilling sequences for 0.5m, Shed-pipe Advanced Support hole 7 from high hole position to low hole position in the heart；
（2）Using rapid hardening high pressure concrete into Shed-pipe Advanced Support hole 7 rotary jet grouting, until Shed-pipe Advanced Support hole stream slurry after, stop mud jacking；
（3）Repeat step（1）、（2）Until tunnel center both sides, each 60 ° of scopes are all finished；
（4）Top boulder group is isolated into the pipe of concrete canopy 8 of 120 ° of scopes with center in tunnel upper formation；
（5）The tunnel construction sections of boulder group above shield driving, safety.
Wherein, step（1）In, it is the smaller the better that the outer limb in Shed-pipe Advanced Support hole does not invade tunnel excavation contour line.
Embodiment 3
As Figure 1-3, Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, follows the steps below：
（1）Shield is shut down; Shed-pipe Advanced Support hole 7 is applied along the top of tunnel excavation contour line 6 by cutterhead opening; the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6; the hole depth in Shed-pipe Advanced Support hole 7 is 10m and more than the anterior position 1.5m of boulder 1; a diameter of 100mm in Shed-pipe Advanced Support hole 7; the line of the hole heart of Shed-pipe Advanced Support hole 7 is domed, and the hole in adjacent Shed-pipe Advanced Support hole 7 is carried out away from the drilling sequences for 0.5m, Shed-pipe Advanced Support hole 7 from high hole position to low hole position in the heart；
（2）Using rapid hardening high pressure concrete into Shed-pipe Advanced Support hole 7 rotary jet grouting, until Shed-pipe Advanced Support hole 7 stream slurry after, stop mud jacking；
（3）Repeat step（1）、（2）Until tunnel center both sides, each 60 ° of scopes are all finished；
（4）Top boulder group is isolated into the pipe of concrete canopy 8 of 120 ° of scopes with center in tunnel upper formation；
（5）The tunnel construction sections of boulder group above shield driving, safety.
Wherein, step（1）In, it is the smaller the better that the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6.
Embodiment 4
As Figure 1-3, Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, follows the steps below：
（1）Shield is shut down; Shed-pipe Advanced Support hole 7 is applied along the top of tunnel excavation contour line 6 by cutterhead opening; the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6; the hole depth in Shed-pipe Advanced Support hole 7 is 8m and more than the anterior position 2m of boulder 1; a diameter of 110mm in Shed-pipe Advanced Support hole 7; the line of the hole heart of Shed-pipe Advanced Support hole 7 is domed, and the hole in adjacent Shed-pipe Advanced Support hole 7 is carried out away from the drilling sequences for 0.5m, Shed-pipe Advanced Support hole 7 from high hole position to low hole position in the heart；
（2）Using rapid hardening high pressure concrete into Shed-pipe Advanced Support hole 7 rotary jet grouting, until Shed-pipe Advanced Support hole 7 stream slurry after, stop mud jacking；
（3）Repeat step（1）、（2）Until tunnel center both sides, each 60 ° of scopes are all finished；
（4）Top boulder group is isolated into the pipe of concrete canopy 8 of 120 ° of scopes with center in tunnel upper formation；
（5）The tunnel construction sections of boulder group above shield driving, safety.
Wherein, step（1）In, it is the smaller the better that the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6.
Embodiment 5
As Figure 1-3, Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, follows the steps below：
（1）Shield is shut down; Shed-pipe Advanced Support hole 7 is applied along the top of tunnel excavation contour line 6 by cutterhead opening; the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6; the hole depth in Shed-pipe Advanced Support hole 7 is 10m and more than the anterior position 2m of boulder 1; a diameter of 120mm in Shed-pipe Advanced Support hole 7; the line of the hole heart of Shed-pipe Advanced Support hole 7 is domed, and the hole in adjacent Shed-pipe Advanced Support hole 7 is carried out away from the drilling sequences for 0.5m, Shed-pipe Advanced Support hole 7 from high hole position to low hole position in the heart；
（2）Using rapid hardening high pressure concrete into Shed-pipe Advanced Support hole 7 rotary jet grouting, until Shed-pipe Advanced Support hole 7 stream slurry after, stop mud jacking；
（3）Repeat step（1）、（2）Until tunnel center both sides, each 90 ° of scopes are all finished；
（4）Top boulder group is isolated into the pipe of concrete canopy 8 of 180 ° of scopes with center in tunnel upper formation；
（5）The tunnel construction sections of boulder group above shield driving, safety.
Wherein, step（1）In, it is the smaller the better that the outer limb in Shed-pipe Advanced Support hole 7 does not invade tunnel excavation contour line 6.
The present invention is for boulder group above shield tunnel, by pre-grouting one pipe canopy of formation, solves boulder group in the soil body of shield tunnel top and sink or subsidence problems, shield is passed through the boulder group of tunnel upper, ensure the smooth construction of shield tunnel；Pipe of concrete canopy formation supporting construction, the pipe canopy constructed in advance is isolated into support with the support of front of tunnel heading unconsolidated formation and boulder group, forms the shell-like structure around tunnel profile top, effectively suppresses stratum and loosens and collapse；The line of the Shed-pipe Advanced Support hole hole heart is domed, pipe of concrete canopy formation arching, bears great efforts, support strength is high；Generate reinforcing basement effect：Grouting serous fluid enters in stratum and crack through Shed-pipe Advanced Support pore pressure, makes scall or rock mass is cementing, consolidation, so as to improve the physico-mechanical properties on stratum, enhance stratum from ability to bear, reached the purpose of reinforcing pipe canopy surrounding formations；Ensure construction safety：Pipe shed support rigidity is larger, and loose soil layer and boulder collapse on pipe canopy during shield driving, plays buffering and buffer action, it is therefore prevented that boulder extruding shield, card shield even damage cutterhead in tunneling process, have been greatly reduced range of disturbance and surface subsidence.
5 embodiments to the present invention are described in detail above, but the content is only presently preferred embodiments of the present invention, it is impossible to be considered as the practical range for limiting the present invention.Within any changes and modifications in accordance with the scope of the present application, the patent covering scope that all should still belong to the present invention.
Claims (9)
1. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel, it is characterised in that follow the steps below：
（1）Shield is shut down, and Shed-pipe Advanced Support hole is applied along above tunnel excavation contour line by cutterhead opening；
（2）Using rapid hardening high pressure concrete into the Shed-pipe Advanced Support hole rotary jet grouting, until the Shed-pipe Advanced Support hole stream slurry after, stop mud jacking；
（3）Described in repeat step（1）、（2）Until each 30 °~90 ° of tunnel center both sides, scope is all finished；
（4）Tunnel upper formation with center into 60 °~
The pipe of concrete canopy of 180 ° of scopes, isolation top boulder group；
（5）The tunnel construction sections of boulder group above shield driving, safety.
2. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（1）In, the outer limb in the Shed-pipe Advanced Support hole does not invade tunnel excavation contour line.
3. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（1）In, the hole depth≤10m in the Shed-pipe Advanced Support hole.
4. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 3, it is characterised in that：The step（1）In, the more excellent hole depth in the Shed-pipe Advanced Support hole is 5~10m, to be preferred more than 1~2m of boulder anterior position.
5. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（1）In, a diameter of 80~120mm in the Shed-pipe Advanced Support hole.
6. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（1）In, the line of the Shed-pipe Advanced Support hole hole heart is domed, and the hole in adjacent Shed-pipe Advanced Support hole is in the heart away from for 0.5m.
7. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（1）In, the drilling sequences in Shed-pipe Advanced Support hole are carried out from high hole position to low hole position.
8. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（3）In, each 60 ° of tunnel center both sides are more excellent scope.
9. Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel according to claim 1, it is characterised in that：The step（4）In, pipe of concrete canopy is formed with center into 120 ° as more excellent scope in tunnel upper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057115.3A CN107013219A (en) | 2016-01-28 | 2016-01-28 | Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057115.3A CN107013219A (en) | 2016-01-28 | 2016-01-28 | Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel |
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|---|---|
| CN107013219A true CN107013219A (en) | 2017-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610057115.3A Pending CN107013219A (en) | 2016-01-28 | 2016-01-28 | Shed-pipe Advanced Support isolates the method for boulder group above a kind of shield tunnel |
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| CN (1) | CN107013219A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435541A (en) * | 2017-09-18 | 2017-12-05 | 中铁工程装备集团有限公司 | A kind of new TBM and its construction method for possessing pipe roof construction ability |
| CN109611103A (en) * | 2019-01-30 | 2019-04-12 | 中铁十局集团城市轨道工程有限公司 | A method of for boulder group consolidation process outstanding on shield section |
| CN109707388A (en) * | 2019-01-07 | 2019-05-03 | 中铁十一局集团城市轨道工程有限公司 | The method of surface collapse when preventing shield launching from wearing existing shield tunnel down |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435541A (en) * | 2017-09-18 | 2017-12-05 | 中铁工程装备集团有限公司 | A kind of new TBM and its construction method for possessing pipe roof construction ability |
| CN107435541B (en) * | 2017-09-18 | 2023-04-25 | 中铁工程装备集团有限公司 | TBM with pipe shed construction capability and construction method thereof |
| CN109707388A (en) * | 2019-01-07 | 2019-05-03 | 中铁十一局集团城市轨道工程有限公司 | The method of surface collapse when preventing shield launching from wearing existing shield tunnel down |
| CN109707388B (en) * | 2019-01-07 | 2024-02-06 | 中铁十一局集团城市轨道工程有限公司 | Method for preventing ground collapse when shield tunneling machine starts to pass through existing shield tunnel |
| CN109611103A (en) * | 2019-01-30 | 2019-04-12 | 中铁十局集团城市轨道工程有限公司 | A method of for boulder group consolidation process outstanding on shield section |
| CN109611103B (en) * | 2019-01-30 | 2024-01-30 | 中铁十一局集团城市轨道工程有限公司 | Method for reinforcing shield section suspended boulder group |
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