CN109268016A - Dovetail type method for tunnel construction - Google Patents
Dovetail type method for tunnel construction Download PDFInfo
- Publication number
- CN109268016A CN109268016A CN201811013810.5A CN201811013810A CN109268016A CN 109268016 A CN109268016 A CN 109268016A CN 201811013810 A CN201811013810 A CN 201811013810A CN 109268016 A CN109268016 A CN 109268016A
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- mid
- dovetail type
- construction
- single line
- tunnel construction
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- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000004880 explosion Methods 0.000 claims abstract description 20
- 238000005422 blasting Methods 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 11
- 230000005641 tunneling Effects 0.000 claims abstract description 8
- 238000009412 basement excavation Methods 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005474 detonation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 241000397426 Centroberyx lineatus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000000926 separation method Methods 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
- E21D9/03—Driving non-circular tunnels
-
- 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
- E21D20/00—Setting anchoring-bolts
-
- 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
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides a kind of dovetail type method for tunnel construction, belong to technical field of tunnel construction, include the following steps, the big span of two-wire is constructed using benching tunnelling method to breakthrough point, and applies supporting；Mid-board end position reinforces；Left line single line section is constructed using full face tunneling method to breakthrough point, implements explosion using photoface exploision method, and applies preliminary bracing, inverted arch and two linings；Right line single line section is constructed using full face tunneling method to breakthrough point, implements explosion in two times using micro- vibration blasting procedure.Dovetail type method for tunnel construction provided by the invention reinforces the end position of mid-board, can prevent from damaging mid-board when left line single line section construction blasting；Right line single line section implements explosion using micro- vibration blasting procedure in two times, and micro- vibration explosion can control the vibration velocity of explosion generation, the interference to country rock be reduced, so as to substantially reduce destruction of the explosion to mid-board and left line single line section tunnel.
Description
Technical field
The invention belongs to method for tunnel construction technical fields, are to be related to a kind of dovetail type constructing tunnel side more specifically
Method.
Background technique
Due to line alignment and Geological Reasons, in Tunnel Engineering design, it is frequently encountered by the big span warp of double track tunnel
Double Multi-Arch section is transited into the dovetail type tunnel of left and right single line section separation.The thickness of the mid-board of the small spacing section of left and right single line is smaller,
Difficulty of construction is big, and rear row single line section is constructed using full-face blast method, inherently causes to mid-board and leading single line section tunnel
It destroys.
Summary of the invention
The purpose of the present invention is to provide a kind of dovetail type method for tunnel construction, it is intended to solve it is existing in the prior art after
Row single line section blast working is easy the technical issues of damaging to mid-board and leading single line section tunnel.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of dovetail type method for tunnel construction is provided, including
Following steps:
A. it the big span construction of two-wire: is constructed using benching tunnelling method to breakthrough point, and applies supporting；
B. mid-board end position reinforces；
C. it left line single line section construction: is constructed using full face tunneling method to breakthrough point, explosion is implemented using photoface exploision method；
And apply preliminary bracing, inverted arch and two linings；
D. right line single line section construction: being constructed using full face tunneling method to breakthrough point, real in two times using micro- vibration blasting procedure
Apply explosion.
Further, in the step B, mid-board end position is reinforced using more hollow grouting anchors.
Further, in the step C, the arrangement form of the periphery hole of the photoface exploision method is that the short eye of slot mesh staggeredly divides
Cloth.
Further, the left line single line section of the step C is constructed to breakthrough point, to the close of left line single line section and mid-board
The position of breakthrough point applies strengthening supporting.
Further, in the step D, according to the thickness of mid-board determine country rock excavate cyclic advance, end recycle into
The distance of ruler is gradually reduced.
Further, in the step D, the borehole linear arrangement of micro- vibration blasting procedure.
Further, in the step D, right line single line section uses small pilot tunnel partial excavation mode, and detonation mode is centre
Pilot tunnel detonates in advance, periphery secondary initiation.
Further, in the step D, using vialog to work progress real-time monitoring.
Further, further include step E. mid-board end position plugging construction after the step D: using reinforced concrete
Grave blocks up mid-board end position and end notch.
The beneficial effect of dovetail type method for tunnel construction provided by the invention is: compared with prior art, swallow of the present invention
Tail formula method for tunnel construction, the big span of two-wire reinforce the end position of mid-board after constructing to breakthrough point, can prevent a left side
Mid-board is damaged when line single line section construction blasting；Right line single line section implements explosion using micro- vibration blasting procedure in two times, micro-
Vibration explosion can control the vibration velocity of explosion generation, the interference to country rock be reduced, so as to substantially reduce explosion to mid-board and a left side
The destruction in line single line section tunnel.
Detailed description of the invention
Fig. 1 is the plan view in dovetail type tunnel provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram after the mid-board end position in dovetail type tunnel provided in an embodiment of the present invention reinforces；
Fig. 3 is the arrangement form signal of the periphery hole of the left line single line section in dovetail type tunnel provided in an embodiment of the present invention
Figure；
Fig. 4 is that the left line single line section in dovetail type tunnel provided in an embodiment of the present invention applies the plane signal of strengthening supporting
Figure.
In figure: 10, the big span of two-wire；20, mid-board；30, left line single line section；40, right line single line section；50, grouted anchor bar；
60, slot mesh；70, short eye；80, steel arch-shelf；90, hollow bolt.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Also referring to Fig. 1 to Fig. 4, now dovetail type method for tunnel construction provided by the invention is illustrated.The swallow
Tail formula method for tunnel construction, comprising the following steps:
A. the big span 10 of two-wire is constructed: being constructed using benching tunnelling method to breakthrough point, and is applied preliminary bracing；
B. 20 end position of mid-board reinforces；
C. left line single line section 30 is constructed: being constructed using full face tunneling method to breakthrough point, is implemented using photoface exploision method quick-fried
It is broken；And apply preliminary bracing, inverted arch and two linings；
D. right line single line section 40 is constructed: being constructed using full face tunneling method to breakthrough point, in two times using micro- vibration blasting procedure
Implement explosion.
Dovetail type method for tunnel construction provided by the invention, compared with prior art, the big construction of span 10 of two-wire to perforation
The end position of mid-board 20 is reinforced after point, can prevent from causing brokenly mid-board 20 when left line single line 30 construction blasting of section
It is bad；Right line single line section 40 implements explosion using micro- vibration blasting procedure in two times, and micro- vibration explosion can control the vibration velocity of explosion generation, drop
The low interference to country rock, so as to substantially reduce destruction of the explosion to mid-board 20 and left 30 tunnel of line single line section.
The excavation in dovetail type tunnel and supporting are all constructed under the guidance of monitoring measurement.Since tunnel is small
Away from the excavation of barrel disturbs greatly country rock, to reinforce the monitoring measurement to country rock.During constructing tunnel, it is substantially carried out ground
Observation of surrounding rock etc. monitors in table sinking, vault sinking, perimeter convergence, blasting vibration, anchor pole internal force and hole, and timely feedbacks measurement
Information.When row excavates behind the especially small right threaded list road of spacing section, frequency need to be increased to leading left line enclosing rock measure, encrypt observation mark,
Observation in time, it is ensured that the construction safety in tunnel.
In step A, the arch of preliminary bracing uses 50 supporting of grouted anchor bar that more root long degree are that 4m diameter is 25mm, abutment wall
Using the more length in quincuncial arrangement be 4m diameter be 22mm grouting rock bolt, multiple I16 grid steel frames close cyclization branch
Shield, two linings use C40 concrete support.
Referring to Fig. 2, a kind of specific embodiment as dovetail type method for tunnel construction provided by the invention, step B
In, 20 end position of mid-board is reinforced using more hollow grouting anchors 50, wherein the length of grouted anchor bar 50 is
3.5m, diameter 25mm, the spacing of two adjacent and neighbouring grouted anchor bars 50 of front and back are 1.5m.
Referring to Fig. 3, a kind of specific embodiment as dovetail type method for tunnel construction provided by the invention, step C
In, the arrangement form of the periphery hole of photoface exploision method is slot mesh 60, short eye 70 is interspersed.Periphery hole uses Uncoincided charge side
Formula powder charge at powder charge to periphery hole aperture 0.5m, blocks aperture using stemming, then connects primacord, micro- using millisecond detonator
Difference detonation.Slot mesh 60, short eye 70 are interspersed, and out break can be effectively controlled, and improve Smooth Blasting Effects, avoid out break control
Make it is improper and to disturbance caused by mid-board 20.
Referring to Fig. 4, a kind of specific embodiment as dovetail type method for tunnel construction provided by the invention, step C
In, left line single line face stops driving at breakthrough point 10m.After the left construction to breakthrough point of line single line section 30, to left line list
The position of the close breakthrough point of line segment 30 and mid-board 20 applies strengthening supporting.Specifically applying the range of supporting is apart from breakthrough point
Position within 10m carries out supporting using the steel arch-shelf 80 that the hollow bolt 90 and I20 I-steel that diameter is 25mm are formed.
It applies when strengthening supporting is for reducing right line single line 40 blast working of section to mid-board 20 and left line single line section 30
Caused by disturb.
As a kind of specific embodiment of dovetail type method for tunnel construction provided by the invention, in step D, according to interval
The thickness of wall 20 determines that country rock excavates cyclic advance and ends the distance of cyclic advance since the thickness of mid-board 20 gradually becomes smaller
It is gradually reduced, the total dosage of explosive for excavating circulation also gradually becomes smaller.
The borehole of micro- vibration blasting procedure uses linear arrangement in step D, and increases the detonation number of segment of millisecond detonator, to reduce vibration
Dynamic wave superposition, controls vibration velocity.
In step D, arrangement is encrypted in the periphery hole close to left 30 side of line single line section, using decked charge fashion powder charge.
Right line single line section 40 uses small pilot tunnel partial excavation mode, and blasting method is that intermediate pilot tunnel detonates in advance twice, secondary of periphery
It is quick-fried, the disturbance to mid-board 20 can be reduced using micro- vibration blasting procedure.
When the face of right line single line section 40 is apart from breakthrough point 30m, construction uses short drilling depth, weak blast mode, follows every time
Ring drilling depth is 1m.Stop blowing out excavation when the face of right line single line section 40 is apart from breakthrough point 0.5m, it will be remaining using excavator
Part is cut, and realizes that single two-wire is open to traffic.
As a kind of specific embodiment of dovetail type method for tunnel construction provided by the invention, in step D, use
AR63B type vialog disturbs work progress real-time monitoring accurately to grasp right 40 explosion of line single line section to left line single line section 30
Dynamic degree.
As a kind of specific embodiment of dovetail type method for tunnel construction provided by the invention, further include after step D
20 end position plugging construction of step E. mid-board: 20 end position of mid-board and end notch are blocked using armored concrete.
The big span 10 of two-wire blocks barricade using C40 armored concrete with left and right single line section junction, and notch is blocked.Template uses
Fritter punching block, steel pipe support are supported reinforcing.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. dovetail type method for tunnel construction, which comprises the following steps:
A. it the big span construction of two-wire: is constructed using benching tunnelling method to breakthrough point, and applies supporting；
B. mid-board end position reinforces；
C. it left line single line section construction: is constructed using full face tunneling method to breakthrough point, explosion is implemented using photoface exploision method；And it applies
Make preliminary bracing, inverted arch and two linings；
D. it right line single line section construction: is constructed using full face tunneling method to breakthrough point, is implemented in two times using micro- vibration blasting procedure quick-fried
It is broken.
2. dovetail type method for tunnel construction as described in claim 1, which is characterized in that hollow using more in the step B
Grouted anchor bar reinforces mid-board end position.
3. dovetail type method for tunnel construction as described in claim 1, which is characterized in that in the step C, the photoface exploision
The arrangement form of the periphery hole of method is that the short eye of slot mesh is interspersed.
4. dovetail type method for tunnel construction as described in claim 1, which is characterized in that the left line single line section construction of step C
To breakthrough point, strengthening supporting is applied to the position of the close breakthrough point of left line single line section and mid-board.
5. dovetail type method for tunnel construction as described in claim 1, which is characterized in that in the step D, according to mid-board
Thickness determines that country rock excavates cyclic advance, and the distance for ending cyclic advance is gradually reduced.
6. dovetail type method for tunnel construction as claimed in claim 5, which is characterized in that in the step D, micro- vibration explosion
The borehole linear arrangement of method.
7. dovetail type method for tunnel construction as claimed in claim 6, which is characterized in that in the step D, right line single line section is adopted
With small pilot tunnel partial excavation mode, blasting method is that intermediate pilot tunnel detonates in advance twice, periphery secondary initiation.
8. dovetail type method for tunnel construction as claimed in claim 7, which is characterized in that in the step D, use vialog pair
Work progress real-time monitoring.
9. dovetail type method for tunnel construction as described in claim 1, which is characterized in that further include step after the step D
E. mid-board end position and end notch mid-board end position plugging construction: are blocked using armored concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013810.5A CN109268016A (en) | 2018-08-31 | 2018-08-31 | Dovetail type method for tunnel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013810.5A CN109268016A (en) | 2018-08-31 | 2018-08-31 | Dovetail type method for tunnel construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109268016A true CN109268016A (en) | 2019-01-25 |
Family
ID=65154970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811013810.5A Pending CN109268016A (en) | 2018-08-31 | 2018-08-31 | Dovetail type method for tunnel construction |
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| CN (1) | CN109268016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504041A (en) * | 2020-12-01 | 2021-03-16 | 中铁十八局集团第一工程有限公司 | Method for reducing tunnel blasting excavation vibration speed in urban sensitive environment |
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|---|---|---|---|---|
| JPH06323797A (en) * | 1993-05-12 | 1994-11-25 | Asahi Chem Ind Co Ltd | Blasting method |
| CN101363322A (en) * | 2008-09-26 | 2009-02-11 | 中铁十二局集团第二工程有限公司 | Construction method for changing single line to be double in tunnel |
| CN102536252A (en) * | 2012-02-17 | 2012-07-04 | 中国建筑第六工程局有限公司 | Method for digging backward hole of tunnel with quite small clear distance |
| KR20160073179A (en) * | 2014-12-16 | 2016-06-24 | 박재현 | 2arch tunnel with perforant-path in middle retaining wall and constructing method for the same |
| CN105888674A (en) * | 2016-05-11 | 2016-08-24 | 中铁十六局集团北京轨道交通工程建设有限公司 | Method for reinforcing interlaid rocks of small-distance tunnel under different surrounding rock grades |
| CN107063009A (en) * | 2016-08-26 | 2017-08-18 | 中国铁建大桥工程局集团有限公司 | A kind of micro- blasting technology that shakes of subway two-wire longspan tunnel |
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-
2018
- 2018-08-31 CN CN201811013810.5A patent/CN109268016A/en active Pending
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|---|---|---|---|---|
| JPH06323797A (en) * | 1993-05-12 | 1994-11-25 | Asahi Chem Ind Co Ltd | Blasting method |
| CN101363322A (en) * | 2008-09-26 | 2009-02-11 | 中铁十二局集团第二工程有限公司 | Construction method for changing single line to be double in tunnel |
| CN102536252A (en) * | 2012-02-17 | 2012-07-04 | 中国建筑第六工程局有限公司 | Method for digging backward hole of tunnel with quite small clear distance |
| KR20160073179A (en) * | 2014-12-16 | 2016-06-24 | 박재현 | 2arch tunnel with perforant-path in middle retaining wall and constructing method for the same |
| CN105888674A (en) * | 2016-05-11 | 2016-08-24 | 中铁十六局集团北京轨道交通工程建设有限公司 | Method for reinforcing interlaid rocks of small-distance tunnel under different surrounding rock grades |
| CN107063009A (en) * | 2016-08-26 | 2017-08-18 | 中国铁建大桥工程局集团有限公司 | A kind of micro- blasting technology that shakes of subway two-wire longspan tunnel |
| CN108266191A (en) * | 2018-01-17 | 2018-07-10 | 中铁隆工程集团有限公司 | A kind of multiple-arch tunnel optimized construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504041A (en) * | 2020-12-01 | 2021-03-16 | 中铁十八局集团第一工程有限公司 | Method for reducing tunnel blasting excavation vibration speed in urban sensitive environment |
| CN112504041B (en) * | 2020-12-01 | 2022-06-24 | 中铁十八局集团第一工程有限公司 | Method for reducing tunnel blasting excavation vibration speed in urban sensitive environment |
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Application publication date: 20190125 |