CN114150656A - Zero-slope-cutting tunnel entering method for tunnel under condition of surrounding rock breaking - Google Patents
Zero-slope-cutting tunnel entering method for tunnel under condition of surrounding rock breaking Download PDFInfo
- Publication number
- CN114150656A CN114150656A CN202111359490.0A CN202111359490A CN114150656A CN 114150656 A CN114150656 A CN 114150656A CN 202111359490 A CN202111359490 A CN 202111359490A CN 114150656 A CN114150656 A CN 114150656A
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- Prior art keywords
- tunnel
- slope
- cast
- pipe shed
- excavation
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- 239000011435 rock Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 29
- 238000009412 basement excavation Methods 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention relates to a zero-slope-cutting tunnel entering method for a tunnel under the condition of surrounding rock crushing; the method comprises the following steps of 1, carrying out cast-in-place pile row construction outside an excavation boundary along the tunnel line direction; step 2, constructing a top beam system at the upper part of the cast-in-place pile row pile; step 3, constructing the long pipe shed; step 4, tunnel excavation, primary tunnel lining, waterproof system and secondary lining construction are carried out; and 5, performing other pavement structure constructions such as tunnel inverted arch backfilling and the like. The method adopts the construction of cast-in-place piles at two sides of the excavation boundary along the tunnel line direction; constructing an integrated crown beam along a slope toe of an upward slope above the tunnel and the top of the cast-in-place pile; and pipe shed holes are reserved along the peripheral crown beams of the tunnel, a long pipe shed is constructed, and the long pipe shed, the cast-in-place piles and the crown beams form a whole, so that the stability of the upward slope in the excavation process is ensured, the problem of difficult tunnel entry which puzzles the tunnel engineering for a long time is innovatively solved, and the zero-slope-cutting tunnel entry of the tunnel engineering is realized.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a zero-slope-cutting tunnel entering method for a tunnel under a surrounding rock crushing condition.
Background
The stability control of the side slope and the heading slope is a serious difficulty in mountain tunnel construction, and the problem of difficult entry always troubles the smooth development of mountain tunnel engineering construction. The tunnel entering of the mountain tunnel is excavation construction aiming at the original stable mountain side slope body, and the excavation of the wall foot of the stable side slope inevitably influences the original stable side and upward slopes on the upper part of the tunnel. In broken country rock advances the hole work progress, because the country rock stability of excavation face top is relatively poor, easily produces the collapse, for guaranteeing that excavation face top country rock is stable, often adopt the pipe shed to carry out the reinforcement of the peripheral country rock of excavation face, nevertheless to the stability consideration of pipe shed not enough, the stratum is gone into to pipe shed one end anchor, and the tip of the end of exposing supports not enough, though the pipe shed has been under construction often appeared, still produces the adverse slope unstability in the work progress.
Disclosure of Invention
The invention aims to overcome the defects and provides a zero-slope-cutting tunnel entering method for a tunnel under a broken surrounding rock condition by using a cast-in-place pile, which has the characteristics of high construction safety and small construction disturbance.
In order to achieve the above object, the present invention is realized by:
a zero-slope-cutting tunnel entering method for a tunnel under a surrounding rock crushing condition comprises the following steps
Step 1, excavating bored concrete pile row piles outside a boundary along the tunnel line direction to construct, and ensuring the stability of broken surrounding rocks on two sides of a tunnel;
step 2, constructing a top beam system at the upper part of the cast-in-place pile row pile, and excavating boundary top beams along the cross section of the tunnel to reserve a pipe shed construction hole;
the cast-in-place piles and the crown beams are integrally constructed on two sides of the excavation boundary along the tunnel line direction, and effective support is formed for the broken surrounding rock bodies on two sides of the tunnel;
step 3, long pipe shed construction is carried out, the long pipe shed, the cast-in-place piles and the crown beams form a whole, stability of the upward slope in the excavation process is guaranteed, meanwhile, the rock mass is anchored at the rock inlet end of the long pipe shed, the exposed end of the long pipe shed is anchored into the crown beams to form a beam structure, and therefore effective support is provided for crushing the surrounding rocks of the upward slope at the upper part in the excavation process;
step 4, tunnel excavation, primary tunnel lining, waterproof system and secondary lining construction are carried out;
and 5, performing other pavement structure constructions such as tunnel inverted arch backfilling and the like.
The invention adopts the construction filling pile on both sides of the excavation boundary along the tunnel line direction; constructing an integrated crown beam along a slope toe of an upward slope above the tunnel and the top of the cast-in-place pile; the method has the advantages that pipe shed holes are reserved along the peripheral crown beams of the tunnel, the long pipe shed is constructed, the long pipe shed, the cast-in-place piles and the crown beams form a whole, stability of the upward slope in the excavation process is guaranteed, the problem of 'difficult hole entry' which puzzles the tunnel engineering for a long time is innovatively solved, zero slope cutting hole entry of the tunnel engineering is achieved, and the method has the advantages of being high in construction safety, small in construction disturbance, friendly to the environment and the like.
Drawings
FIG. 1 is a front view of the hole entry method of the present invention.
FIG. 2 is a cross-sectional view of a hole-drilling method according to the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in figures 1 and 2, the zero-cutting slope tunnel entering method for the tunnel under the condition of surrounding rock crushing comprises the steps of
Step 1, excavating bored concrete pile row piles outside a boundary along the tunnel line direction to construct, and ensuring the stability of broken surrounding rocks on two sides of a tunnel;
step 2, constructing a top beam system at the upper part of the cast-in-place pile row pile, and excavating boundary top beams along the cross section of the tunnel to reserve a pipe shed construction hole;
the cast-in-place piles and the crown beams are integrally constructed on two sides of the excavation boundary along the tunnel line direction, and effective support is formed for the broken surrounding rock bodies on two sides of the tunnel;
step 3, long pipe shed construction is carried out, the long pipe shed, the cast-in-place piles and the crown beams form a whole, stability of the upward slope in the excavation process is guaranteed, meanwhile, the rock mass is anchored at the rock inlet end of the long pipe shed, the exposed end of the long pipe shed is anchored into the crown beams to form a beam structure, and therefore effective support is provided for crushing the surrounding rocks of the upward slope at the upper part in the excavation process;
step 4, tunnel excavation, primary tunnel lining, waterproof system and secondary lining construction are carried out;
and 5, performing other pavement structure constructions such as tunnel inverted arch backfilling and the like.
The invention adopts the construction filling pile on both sides of the excavation boundary along the tunnel line direction; constructing an integrated crown beam along a slope toe of an upward slope above the tunnel and the top of the cast-in-place pile; the method has the advantages that pipe shed holes are reserved along the peripheral crown beams of the tunnel, the long pipe shed is constructed, the long pipe shed, the cast-in-place piles and the crown beams form a whole, stability of the upward slope in the excavation process is guaranteed, the problem of 'difficult hole entry' which puzzles the tunnel engineering for a long time is innovatively solved, zero slope cutting hole entry of the tunnel engineering is achieved, and the method has the advantages of being high in construction safety, small in construction disturbance, friendly to the environment and the like.
Claims (1)
1. A zero-slope-cutting tunnel entering method for a tunnel under a surrounding rock crushing condition is characterized by comprising the following steps: comprises that
Step 1, excavating bored concrete pile row piles outside a boundary along the tunnel line direction to construct, and ensuring the stability of broken surrounding rocks on two sides of a tunnel;
step 2, constructing a top beam system at the upper part of the cast-in-place pile row pile, and excavating boundary top beams along the cross section of the tunnel to reserve a pipe shed construction hole;
the cast-in-place piles and the crown beams are integrally constructed on two sides of the excavation boundary along the tunnel line direction, and effective support is formed for the broken surrounding rock bodies on two sides of the tunnel;
step 3, long pipe shed construction is carried out, the long pipe shed, the cast-in-place piles and the crown beams form a whole, stability of the upward slope in the excavation process is guaranteed, meanwhile, the rock mass is anchored at the rock inlet end of the long pipe shed, the exposed end of the long pipe shed is anchored into the crown beams to form a beam structure, and therefore effective support is provided for crushing the surrounding rocks of the upward slope at the upper part in the excavation process;
step 4, tunnel excavation, primary tunnel lining, waterproof system and secondary lining construction are carried out;
and 5, performing other pavement structure constructions such as tunnel inverted arch backfilling and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359490.0A CN114150656A (en) | 2021-11-17 | 2021-11-17 | Zero-slope-cutting tunnel entering method for tunnel under condition of surrounding rock breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359490.0A CN114150656A (en) | 2021-11-17 | 2021-11-17 | Zero-slope-cutting tunnel entering method for tunnel under condition of surrounding rock breaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114150656A true CN114150656A (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111359490.0A Pending CN114150656A (en) | 2021-11-17 | 2021-11-17 | Zero-slope-cutting tunnel entering method for tunnel under condition of surrounding rock breaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114150656A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204783044U (en) * | 2015-06-25 | 2015-11-18 | 贵州省公路工程集团有限公司 | Coombe topography loose slope body bevel tunnel in mountain area advances supporting construction in hole |
| CN110374633A (en) * | 2019-07-19 | 2019-10-25 | 中铁隧道集团二处有限公司 | The Portal Section Construction method of Tunnel Passing loose media |
-
2021
- 2021-11-17 CN CN202111359490.0A patent/CN114150656A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204783044U (en) * | 2015-06-25 | 2015-11-18 | 贵州省公路工程集团有限公司 | Coombe topography loose slope body bevel tunnel in mountain area advances supporting construction in hole |
| CN110374633A (en) * | 2019-07-19 | 2019-10-25 | 中铁隧道集团二处有限公司 | The Portal Section Construction method of Tunnel Passing loose media |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20220308 |