CN105673046A - Twin-arch tunnel middle pilot tunnel vault backfilling construction method - Google Patents
Twin-arch tunnel middle pilot tunnel vault backfilling construction method Download PDFInfo
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- CN105673046A CN105673046A CN201610036578.1A CN201610036578A CN105673046A CN 105673046 A CN105673046 A CN 105673046A CN 201610036578 A CN201610036578 A CN 201610036578A CN 105673046 A CN105673046 A CN 105673046A
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- middle drift
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- 239000011378 shotcrete Substances 0.000 claims abstract description 7
- 238000009412 basement excavation Methods 0.000 claims description 37
- 239000004567 concrete Substances 0.000 claims description 17
- 230000008676 import Effects 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 7
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000005192 partition Methods 0.000 abstract 5
- 239000002689 soil Substances 0.000 description 6
- 241000209094 Oryza Species 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (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 invention provides a twin-arch tunnel middle pilot tunnel vault backfilling construction method. The method comprises the following steps that a middle pilot tunnel is excavated, and a support is constructed; after the middle pilot tunnel is excavated and the support extends forwards by a certain distance, a left pilot tunnel is excavated, and a support is constructed; after the middle pilot tunnel is excavated to a certain depth, a middle partition wall is poured; an in-the-hole drill is arranged in position, drill holes are formed, and the drill holes are led to a middle pilot tunnel vault space in the top of the middle partition wall from the left pilot tunnel or a right pilot tunnel; a conveying pipe is installed in the drill holes so that sprayed concrete can enter the middle pilot tunnel vault space in the top of the middle partition wall; twin-arch tunnel middle pilot tunnel vault backfilling construction is achieved. Backfilling of the middle pilot tunnel vault is conducted in the manner that upper steps of the left pilot tunnel are drilled to form the holes. The technical problem that under the working condition that pouring of the middle partition wall is conducted in two directions, the middle pilot tunnel vault can not be backfilled is solved, middle pilot tunnel vault backfilling and middle partition wall pouring are conducted at the same time, and the effective working time is shortened greatly.
Description
Technical field
The present invention relates to Double Multi-Arch Tunnel Construction field, particularly double-arched tunnel middle drift vault backfill construction method.
Background technology
Owing to being designed the constraint of structure and the restriction of stress system by double-arched tunnel itself, the excavation and support topped bar in main hole can be carried out after mid-board is built and vault has backfilled. That is, excavation and the preliminary bracing of middle drift is first carried out in opposite directions from import and outlet; Secondly, after middle drift is through from import to outlet or from outlet to import direction, i.e. the building of unidirectional enforcement mid-board; 3rd, the backfill of middle drift vault is built immediately following mid-board and to outlet or is exported to import direction by import, namely carries out the construction of jetting cement in the same direction; 4th, excavation and the preliminary bracing thereof topped bar in main hole are progressively pushed ahead immediately following the backfill of middle drift vault.
In practice of construction process, if middle drift mileage is longer or cannot carry out excavation and the preliminary bracing of middle drift in opposite directions from importing and exporting in a short time, then main wide open dig with support work by be seriously limited by the excavation of middle drift, supporting and mid-board build, the working procedure such as vault backfill.
When middle drift excavation and preliminary bracing not yet complete, in the middle part of middle drift to import or export carry out mid-board build with middle drift vault backfill construction collide with each other, namely the operation such as mid-board reinforcing bar binding, chassis movement in place, concreting influences each other with the backfill construction of middle drift vault, it is impossible to carry out simultaneously.
Summary of the invention
The technical problem to be solved is to provide a kind of double-arched tunnel middle drift vault backfill construction method, in the middle part of middle drift, mid-board can be implemented to import and export direction to build, and under the form of construction work after mid-board has been built, complete the backfill construction of middle drift vault, efficiency of construction can be improved, shorten the engineering time.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of double-arched tunnel middle drift vault backfill construction method, comprises the following steps:
One, middle drift excavation and supporting;
Two, after middle drift excavation and supporting extend forwardly into a segment distance, left side pilot tunnel and right side pilot tunnel and supporting are excavated;
Three, after middle drift is excavated to certain depth, mid-board is built;
Four, until mid-board build with spud carriage shifting after, arrange down-the-hole drill in place and form boring, holing and lead to the middle drift vault space at mid-board top from left side pilot tunnel or right side pilot tunnel;
Five, down-the-hole drill displacement, concrete spraying machine is in place, installs conveying pipe in boring, makes gunite concrete enter the middle drift vault space at mid-board top;
The backfill construction of double-arched tunnel middle drift vault is realized by above step.
Described boring, along middle drift axis, arranges one every 7 ~ 13 meters.
Bore diameter is 8 ~ 17cm.
Internal diameter of delivery hose is 5 ~ 10cm.
A kind of double-arched tunnel middle drift vault backfill construction method, comprises the following steps:
One, middle drift advance support;
Two, middle drift excavation, preliminary bracing;
Three, mid-board concrete construction;
Four, left side pilot tunnel is topped bar advance support;
Five, left side pilot tunnel is topped bar excavation, initial stage and gib;
Six, right side pilot tunnel is topped bar advance support;
Seven, right side pilot tunnel is topped bar excavation, initial stage and gib;
Eight, on the right side of mid-board, stull or backfill are set with middle drift right wall;
Nine, hole from left side pilot tunnel or right side pilot tunnel to middle drift vault space;
Ten, concrete spraying machine in place and install conveying pipe to middle drift vault space;
11, to gunite concrete in middle drift vault space;
The backfill construction of double-arched tunnel middle drift vault is realized by above step.
After middle drift excavation and supporting extend forward 20-40 rice, excavate left side pilot tunnel and right side pilot tunnel and supporting.
Excavation face distance between left side pilot tunnel and right side pilot tunnel answers >=30m.
After middle drift is excavated to certain depth or is through, in middle drift hole or breakthrough point to one end or import and export two ends build mid-board.
Start to build the time of mid-board and position, top bar the late start time of excavation and support according to left side pilot tunnel or right side pilot tunnel and determine.
Described boring, along middle drift axis, arranges one every 7 ~ 13 meters;
Bore diameter is 8 ~ 17cm.
A kind of double-arched tunnel middle drift vault backfill construction method provided by the invention, by changing middle drift vault of the prior art backfill scheme, realize no longer building and vault backfill construction by the unidirectional enforcement mid-board of import or export, and be adjusted in the middle part of middle drift to importing and exporting direction, namely building of two-way enforcement mid-board is constructed with the mixed backfill of middle drift vault spray. Owing to being limited by middle drift work space in prior art, the backfill construction of middle drift vault is built with mid-board and tops bar in main hole, and excavation interacts with preliminary bracing, it is difficult to construct simultaneously. For overcoming this defect, in the present invention, the backfill of middle drift vault adopts and tops bar from left side pilot tunnel or right side pilot tunnel is topped bar the mode of boring backfill construction. What can solve two-way enforcement mid-board builds the technical barrier that under working condition, middle drift vault cannot backfill, realize the backfill of middle drift vault to build carry out simultaneously with mid-board, it is to avoid build top bar with main hole and Core Soil excavates owing to middle drift backfill construction or backfill affects mid-board not in time. Present invention optimizes and build and the arrangement and method for construction of vault backfill to the unidirectional enforcement mid-board of the other end from middle drift one end, substantially reduce the effective time on Double Multi-Arch Tunnel Construction critical circuits.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the construction procedure schematic diagram of the present invention.
In figure: middle drift advance support 1, middle drift excavates, preliminary bracing 2, mid-board concrete construction 3, left side pilot tunnel is topped bar advance support 4, left side pilot tunnel is topped bar excavation, initial stage and gib 5, right side pilot tunnel is topped bar advance support 6, right side pilot tunnel is topped bar excavation, initial stage and gib 7, stull or backfill 8 are set with the right wall of middle drift on the right side of mid-board, boring 9, concrete spraying machine 10, gunite concrete 11, top bar advance support 12 in main hole, left side, top bar arch Ring Cutting in main hole, left side, preliminary bracing 13, left side main hole top bar Core Soil excavation 14, top bar advance support 15 in main hole, right side, top bar arch Ring Cutting in main hole, right side, preliminary bracing 16, right side main hole top bar Core Soil excavation 17, stull 18.
Detailed description of the invention
As shown in fig. 1, a kind of double-arched tunnel middle drift vault backfill construction method, comprise the following steps:
One, middle drift advance support 1;
Two, middle drift excavation, preliminary bracing 2;
Three, mid-board reinforcing bar binding and chassis are in place, carry out mid-board concrete pouring construction 3; In preferred scheme, after middle drift is excavated to certain depth or is through, in middle drift hole or breakthrough point to one end or import and export two ends build mid-board.
Start to build the time of mid-board and position, top bar the late start time of excavation and support according to left side pilot tunnel or right side pilot tunnel and determine.
Mid-board concreting completes aftertable car and moves to next position in storehouse.
Four, left side pilot tunnel is topped bar advance support 4;
Five, left side pilot tunnel is topped bar excavation, initial stage and gib 5;
In preferred scheme, after middle drift excavation and supporting extend forward 20-40 rice, it is preferred to 30 meters, excavation left side pilot tunnel is topped bar.
Six, right side pilot tunnel is topped bar advance support 6;
Seven, right side pilot tunnel is topped bar excavation, initial stage and gib 7;
Excavation face distance between left side pilot tunnel and right side pilot tunnel answers >=30m. Thus scheme, it is to avoid due to the blasting vibration impact on mutual scope of operation surrounding rock stability.
Eight, stull 18 or backfill 8 are set with the right wall of middle drift on the right side of mid-board;
Nine, owing to being limited by middle drift work space, build in order to avoid middle drift vault backfill construction infection mid-board and top bar and excavate and preliminary bracing in main hole, therefore adopt down-the-hole drill to hole 9 from left side pilot tunnel or right side pilot tunnel. This example adopts from left side pilot tunnel through main hole, left side top bar and main hole, left side top bar Core Soil to middle drift vault space hole 9; In preferred scheme, described boring 9, along middle drift axis, arranges one every 7 ~ 13 meters; Preferred every 10 meters of layouts one. Preferred boring 9 diameters are 8 ~ 17cm. Preferred boring 9 diameters are 15cm. The preferred ZGYX420 of down-the-hole drill in this example.
Ten, concrete spraying machine 10 in place and install conveying pipe to middle drift vault space; Internal diameter of delivery hose is 5 ~ 10cm. This example is preferably 6.5cm. The preferred JRD-PS800 of concrete spraying machine 10 in this example.
11, to gunite concrete in middle drift vault space; Referring to the position of accompanying drawing labelling 11 indication in figure.
The backfill construction of double-arched tunnel middle drift vault is realized by above step.
In follow-up step:
12, top bar advance support 12 in main hole, left side;
13, top bar arch Ring Cutting, preliminary bracing 13 in main hole, left side;
14, main hole, left side top bar Core Soil excavation 14;
15, top bar advance support 15 in main hole, right side;
16, top bar arch Ring Cutting, preliminary bracing 16 in main hole, right side;
17, main hole, right side top bar Core Soil excavation 17.
The excavation of double-arched tunnel is completed by above-mentioned step.
The above embodiments are only the preferred technical solution of the present invention; and it is not construed as the restriction for the present invention; the technical characteristic recorded in the present invention; under the premise do not conflicted; use can be combined mutually; the technical scheme that protection scope of the present invention should be recorded with claim, is protection domain including the equivalents of technical characteristic in the technical scheme that claim is recorded. Namely equivalent replacement the within the scope of this is improved, also within protection scope of the present invention.
Claims (10)
1. a double-arched tunnel middle drift vault backfill construction method, is characterized in that comprising the following steps:
One, middle drift excavation and supporting;
Two, after middle drift excavation and supporting extend forwardly into a segment distance, left side pilot tunnel and right side pilot tunnel and supporting are excavated;
Three, after middle drift is excavated to certain depth, mid-board is built;
Four, until mid-board build with spud carriage shifting after, arrange down-the-hole drill in place and form boring (9), boring (9) is from left side pilot tunnel or right side pilot tunnel towards the middle drift vault space at mid-board top;
Five, down-the-hole drill displacement, concrete spraying machine (10) is in place, installs conveying pipe in boring (9), makes gunite concrete (11) enter the middle drift vault space at mid-board top;
The backfill construction of double-arched tunnel middle drift vault is realized by above step.
2. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 1, is characterized in that: described boring (9), along middle drift axis, arranges one every 7 ~ 13 meters.
3. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 1, is characterized in that: boring (9) diameter is 8 ~ 17cm.
4. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 1, is characterized in that: internal diameter of delivery hose is 5 ~ 10cm.
5. a double-arched tunnel middle drift vault backfill construction method, is characterized in that comprising the following steps:
One, middle drift advance support (1);
Two, middle drift excavation, preliminary bracing (2);
Three, mid-board concrete construction (3);
Four, left side pilot tunnel is topped bar advance support (4);
Five, left side pilot tunnel is topped bar excavation, initial stage and gib (5);
Six, right side pilot tunnel is topped bar advance support (6);
Seven, right side pilot tunnel is topped bar excavation, initial stage and gib (7);
Stull or backfill (8) eight, are set with the right wall of middle drift on the right side of mid-board;
Nine, (9) are holed from left side pilot tunnel or right side pilot tunnel to middle drift vault space;
Ten, concrete spraying machine (10) in place and install conveying pipe to middle drift vault space;
11, to gunite concrete in middle drift vault space;
The backfill construction of double-arched tunnel middle drift vault is realized by above step.
6. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 5, is characterized in that: after middle drift excavation and supporting extend forward 20-40 rice, excavate left side pilot tunnel and right side pilot tunnel and supporting.
7. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 5, is characterized in that: the excavation face distance between left side pilot tunnel and right side pilot tunnel answers >=30m.
8. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 5, is characterized in that: after middle drift is excavated to certain depth or is through, in middle drift hole or breakthrough point to one end or import and export two ends and build mid-board.
9. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 8, is characterized in that: start to build time and the position of mid-board, tops bar the late start time of excavation and support according to left side pilot tunnel or right side pilot tunnel and determines.
10. a kind of double-arched tunnel middle drift vault backfill construction method according to claim 5, is characterized in that: described boring (9), along middle drift axis, arranges one every 7 ~ 13 meters;
Boring (9) diameter is 8 ~ 17cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610036578.1A CN105673046B (en) | 2016-01-20 | 2016-01-20 | Double-arched tunnel middle drift vault backfills construction method |
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| CN201610036578.1A CN105673046B (en) | 2016-01-20 | 2016-01-20 | Double-arched tunnel middle drift vault backfills construction method |
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| CN105673046B CN105673046B (en) | 2018-05-01 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884665A (en) * | 2017-04-19 | 2017-06-23 | 中铁局集团有限公司 | A kind of Double Multi-Arch start tunneling method based on arch set arch |
| CN108843333A (en) * | 2018-04-25 | 2018-11-20 | 广州地铁设计研究院有限公司 | Collapsible Loess District tunneling double-arched tunnel passes through the construction method of existing railway |
| CN109209429A (en) * | 2018-09-19 | 2019-01-15 | 中建三局基础设施建设投资有限公司 | A kind of anti-sidesway support trolley of Middle Wall of Multi-Arch Highway Tunnel and its construction method |
| CN109882182A (en) * | 2019-01-09 | 2019-06-14 | 中铁七局集团西安铁路工程有限公司 | A kind of extra small clear distance construction method in tunnel |
| CN110017143A (en) * | 2019-05-10 | 2019-07-16 | 兰州铁道设计院有限公司 | A kind of auxiliary method of small interval loess tunnel construction of central division wall |
| CN112412474A (en) * | 2020-11-25 | 2021-02-26 | 中交二航局第二工程有限公司 | Multi-arch tunnel construction method |
| CN113622941A (en) * | 2021-09-10 | 2021-11-09 | 中铁一局集团第五工程有限公司 | Large-span double-arch tunnel excavation method under urban complex environment |
| CN114352292A (en) * | 2021-12-31 | 2022-04-15 | 中交路桥建设有限公司 | Shallow-buried bias-pressure multi-arch tunnel construction method for weathering phyllite stratum |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106884665A (en) * | 2017-04-19 | 2017-06-23 | 中铁局集团有限公司 | A kind of Double Multi-Arch start tunneling method based on arch set arch |
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| CN108843333A (en) * | 2018-04-25 | 2018-11-20 | 广州地铁设计研究院有限公司 | Collapsible Loess District tunneling double-arched tunnel passes through the construction method of existing railway |
| CN109209429A (en) * | 2018-09-19 | 2019-01-15 | 中建三局基础设施建设投资有限公司 | A kind of anti-sidesway support trolley of Middle Wall of Multi-Arch Highway Tunnel and its construction method |
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| CN110017143A (en) * | 2019-05-10 | 2019-07-16 | 兰州铁道设计院有限公司 | A kind of auxiliary method of small interval loess tunnel construction of central division wall |
| CN112412474A (en) * | 2020-11-25 | 2021-02-26 | 中交二航局第二工程有限公司 | Multi-arch tunnel construction method |
| CN113622941A (en) * | 2021-09-10 | 2021-11-09 | 中铁一局集团第五工程有限公司 | Large-span double-arch tunnel excavation method under urban complex environment |
| CN114352292A (en) * | 2021-12-31 | 2022-04-15 | 中交路桥建设有限公司 | Shallow-buried bias-pressure multi-arch tunnel construction method for weathering phyllite stratum |
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