CN109973123A - A kind of multiple-arch tunnel middle drift gib arch method for dismounting - Google Patents
A kind of multiple-arch tunnel middle drift gib arch method for dismounting Download PDFInfo
- Publication number
- CN109973123A CN109973123A CN201910244619.XA CN201910244619A CN109973123A CN 109973123 A CN109973123 A CN 109973123A CN 201910244619 A CN201910244619 A CN 201910244619A CN 109973123 A CN109973123 A CN 109973123A
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- Prior art keywords
- arch
- gib
- cutting line
- middle drift
- dismounting
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 238000005520 cutting process Methods 0.000 claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 238000010276 construction Methods 0.000 claims abstract description 13
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920001195 polyisoprene Polymers 0.000 claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 7
- 239000000872 buffer Substances 0.000 abstract description 3
- 238000007363 ring formation reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 element Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000005641 tunneling Effects 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- 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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of multiple-arch tunnel middle drift gib arch method for dismounting, are uniformly arranged several type steel supports in the tunnel of middle drift gib arch section to be removed first；Then according to drilling depth length is removed, the dismounting cutting line for removing drilling depth every time and the construction drill on removing cutting line are determined；It finally knocks out concrete on cutting line and cuts the reinforcing bar and steel arch-shelf of connection；The present invention passes through setting type steel support and caoutchouc elasticity cushion block；It effectively buffers and sponges part drilling, knock out the vibration generated in Concrete, concentration is avoided to be applied at the top of mid-board, to reduce the disturbance to mid-board；The vibration for knocking out and generating in Concrete is effectively absorbed by setting drilling, while drilling and destroying the globality of gib thin-wall construction, it is ensured that knocks out the relaxed victory of concrete light；The present invention effectively reduces the disassembly period in the case where the disturbance to mid-board and surrounding country rock is small, and highly-safe.
Description
Technical field
The present invention relates to technical field of tunnel construction, in particular to a kind of multiple-arch tunnel middle drift gib arch is removed
Method.
Background technique
Currently, multiple-arch tunnel is tunnel form a kind of more novel and that structure is special, have by orographic condition limited it is small,
The features such as Economization on land, structural integrity be good and comprehensive cost low, is that the current country builds one of the ideal chose in tunnel,
It is widely used in the infrastructure such as highway in China, railway, municipal administration；In Multi-arch Tunnel Construction, often constructed using three-drift method,
Middle drift is excavated first, then performs mid-board, then excavates left and right pilot tunnel respectively；It needs to remove middle drift when excavating main hole
Gib arch, so as to main hole just serve as a contrast closing cyclization；But due to when removing middle drift gib arch, interval
The uncertainty of the stress of wall changeable feature and tunnel surrounding property, objectively causes the uneasiness in the tunnel in demolishing process
Quan Xing.This is because knocking out Concrete when removing gib steel arch-shelf, reinforcing bar and concrete triplicity body
The vibration of middle generation will certainly generate disturbance to mid-board and country rock that it is contacted, in addition the country rock load of tunnel arch and
The vibration of the frequent Blasting Excavation in tunnel or so hole easily causes mid-board cracking, sliding and inclination, even tunnel surrounding is caused to lose
Surely, the serious consequences such as vault collapsing.
Currently, when removing middle drift gib, in order to reduce the disturbance to mid-board and country rock, pneumatic pick edge is generally used
Cut surface little by little slowly knock out concrete, then by the framework of steel reinforcement exposed be welded cut；Although in this way
Effect is preferable, but speed of application is at high cost slowly；Some job site personnels are constructed in violation of rules and regulations, are directly adopted to accelerate speed of application
Concrete is knocked out with excavator hydraulic breaking hammer, the principle that New Austrian Tunneling Method construction disturbs less is seriously violated, constructing tunnel is significantly greatly increased
Risk.
Summary of the invention
For the technical problems in the prior art, the purpose of the present invention is to provide a kind of multiple-arch tunnel middle drifts to face
When supporting arch method for dismounting, it is intended to solve traditional multiple-arch tunnel middle drift gib arch method for dismounting to country rock and interval
Wall disturbance is big, safety coefficient is low, with duration and the problem of engineering complexity.
To reach realization above-mentioned purpose, the present invention adopts the following technical scheme:
A kind of multiple-arch tunnel middle drift gib arch method for dismounting, comprising the following steps:
Step 1 is uniformly arranged several type steel supports, fashioned iron in the tunnel of middle drift gib arch section to be removed
Support level setting；One end of type steel support and mid-board elastic connection, the other end of type steel support and arch frame structure to be removed
Elastic connection；
Step 2, according to remove drilling depth length, determine every time remove drilling depth dismounting cutting line；
Construction drill in step 3, the dismounting cutting line determined in step 2；
Step 4 knocks out the concrete removed on cutting line between adjacent drilling, makes to remove part arch to be removed on cutting line
Reinforcing bar and the steel arch-shelf exposure of frame and main body arch connecting portion；
The type steel support being arranged in step 5, removal step 1 cuts off part arch to be removed and main body arch connecting portion
Reinforcing bar and steel arch-shelf；
Step 6, repeat the above steps 1-5, completes until removing to the gib in middle drift.
Further, in step 1 the same section in tunnel type steel support horizontal parallel setting, adjacent type steel support it is vertical
Spacing is 1400-1600mm；It is 1000-1200mm along the distance between middle drift axis direction adjacent sections.
Further, between the medium-sized bracing members of step 1 and mid-board be arranged caoutchouc elasticity cushion block, type steel support with it is to be removed
Caoutchouc elasticity cushion block is set between the inner wall of arch frame structure.
Further, caoutchouc elasticity cushion block is with a thickness of 80-100mm.
Further, the line of demarcation that cutting line is part arch to be removed and main body arch part arch is removed in step 2；
Remove the vertical cutting line that cutting line includes the longitudinally cutting line and vertical middle drift axis along middle drift axis；Longitudinally cutting line
For mid-board and steel arch-shelf structure intersection to be removed；Vertical cutting line is an arch striking part and arch striking portion next time
The handover line divided.
Further, the diameter to drill in step 3 is 180-200mm, the spacing 300- between two neighboring drilling
400mm。
Further, using the artificial concrete for being knocked out and being removed on cutting line between drilling using pneumatic pick in step 4.
Further, it waits for being connected between part arch and main body arch except removing using electric welding cutting machine cut in step 6
Reinforcing bar and steel arch-shelf.
Compared with the prior art, the beneficial effects of the present invention are as follows:
A kind of multiple-arch tunnel middle drift gib arch method for dismounting of the present invention, by mid-board and arch to be removed
Setting caoutchouc elasticity cushion block between type steel support, type steel support and mid-board and steel arch-shelf to be removed is set between inside；Rubber
Elastic cushion block effectively can buffer and sponge part drilling, knock out the vibration generated in Concrete；Remaining vibration is as far as possible
In stepless action to mid-board, concentration is avoided to be applied at the top of mid-board, to reduce the disturbance to mid-board；On cut-off rule
Drilling destroy gib thin-wall construction globality, pneumatic pick knock out concrete when it is easily quick, while drilling can effectively absorb
Part knocks out the vibration that concrete generates；Cutting off reinforcing bar, the steel arch-shelf removed on cutting line makes to remove part steel arch-shelf and main body
Arch is kept completely separate；Just lining closing cyclization is excavated simultaneously convenient for next step inverted arch.
The present invention effectively reduces disassembly period, and safety in the case where the disturbance to mid-board and surrounding country rock is small
Property it is high；And this method has extensive versatility in removing similar thin-wall construction.
Detailed description of the invention
Fig. 1 is elastic cushion block and type steel support arrangement schematic diagram in method for dismounting of the present invention；
Fig. 2 is dismounting cutting line and drilling arrangement schematic diagram in method for dismounting of the present invention；
Fig. 3 is the working principle flow chart of method for dismounting of the present invention.
Wherein, 1 mid-board, 2 arch frame structures to be removed, 3 type steel supports, 4 elastic cushion blocks, 5 cutting lines, 6 drillings；51 is longitudinal
Cutting line, 52 vertical cutting lines.
Specific embodiment
Explanation is further explained to the present invention below in conjunction with attached drawing 1-3 and specific embodiment, it should be noted that this hair
Bright to be not limited to following specific embodiments, all equivalent transformations made on the basis of the technical solutions of the present application each falls within of the invention
Protection scope.
With reference to shown in attached drawing 1-3, a kind of multiple-arch tunnel middle drift gib arch method for dismounting of the present invention, including it is following
Step:
Step 1 is uniformly arranged several type steel supports 3 in the tunnel of middle drift gib arch section to be removed,
Type steel support 3 is horizontally disposed；One end of type steel support 3 and 1 elastic connection of mid-board, the other end of type steel support 3 with it is to be removed
The inner wall elastic connection of arch frame structure 2；Type steel support 3 uses the fashioned iron of I22, and the same medium-sized bracing members 3 of section are vertically set in parallel
It sets, the spacing of vertically-adjacent type steel support 3 is 1400-1600mm；It is along the distance between middle drift axis direction adjacent sections
1000-1200mm；Elastic cushion block 4, type steel support 3 and arch frame structure 2 to be removed are set between type steel support 3 and mid-board 1
Elastic cushion block 4 is set between inner wall；Elastic cushion block 4 use caoutchouc elasticity cushion block, caoutchouc elasticity cushion block with a thickness of 80-100mm；
Preferably, rubber mat block size feature is length × width x thickness=300mm × 200mm × 100mm；
Step 2, according to remove drilling depth length, determine it is each remove drilling depth dismounting cutting line 5；Remove cutting line 5 be to
Remove the line of demarcation of part arch frame structure 2 and main body arch part arch；Removing cutting line 5 includes along the longitudinal direction of middle drift axis
The vertical cutting line 52 of cutting line 51 and vertical middle drift axis；Longitudinally cutting line 51 is mid-board 1 and arch frame structure 2 to be removed
Intersection；Vertical cutting line 52 is the handover line of an arch striking part with arch striking part next time；Cutting line 5 is removed to set
It sets at the connection steel mesh between steel arch-shelf, and steel arch-shelf setting should be avoided；
Construction drill 6 in step 3, the dismounting cutting line 5 determined in step 2；The diameter 180-200mm of drilling 6 is adjacent
The spacing 300-400mm of drilling 6；The position of drilling 6 should avoid steel arch-shelf setting to be removed；
Step 4 utilizes pneumatic pick to knock out the concrete removed on cutting line 5 between adjacent drilling 6 using artificial, makes to remove and cut
The reinforcing bar of connecting portion and steel arch-shelf exposure between steel arch-shelf and main body arch to be removed on secant 5；
The type steel support 3 being arranged in step 5, removal step 1 cuts off steel arch-shelf to be removed and main body using electric welding cutting machine
The reinforcing bar and steel arch-shelf of connecting portion between arch；
Step 6, repeat the above steps 1-5, completes until removing to the gib in middle drift.
Working principle:
According to vibration wave propagation principle, using adding type steel support, type steel support between mid-board and arch to be removed
Caoutchouc elasticity cushion block is set between mid-board and steel arch-shelf to be removed；Caoutchouc elasticity cushion block effectively can buffer and sponge part
Drilling knocks out the vibration generated in Concrete, remaining to vibrate in stepless action to mid-board as far as possible, and concentration is avoided to act on
At the top of to mid-board, to reduce the disturbance to mid-board.
On cut-off rule drilling destroy gib thin-wall construction globality, pneumatic pick knock out concrete when it is easily quick,
Drilling simultaneously can effectively absorb part and knock out the vibration that concrete generates；Cutting off reinforcing bar, the steel arch-shelf removed on cutting line makes to tear open
Except part steel arch-shelf and main body arch are kept completely separate, so that inverted arch excavates just lining rear enclosed cyclization.
The present invention is encircleed in middle drift adds caoutchouc elasticity cushion block, type steel support and in middle drift gib thin-walled knot
Along the drilling for removing the default spacing setting diameter 180-200mm of cutting line on structure, drilling destroys the globality of thin-wall construction, from
And the concrete between drilling can be quickly knocked out with pneumatic pick, while bored hole being utilized to absorb partial vibration wave, it greatly reduces
Pneumatic pick generates disturbance of the vibration to mid-board and country rock when abolishing concrete；This method can make to similar thin-wall construction is removed
With.
Above-mentioned specific embodiment and attached drawing are only the common embodiment of the present invention, it is clear that are not departing from claims
Can there are various supplements, modification and replacement under the premise of the spirit of that invention and invention scope that are defined；Those skilled in the art
It should be understood that the present invention in practical applications can be according to specific environment and job requirement in the premise without departing substantially from invention criterion
Under, it is varied in form, structure, layout, ratio, material, element, component and other aspects；Therefore, the implementation being disclosed herein
Example be merely to illustrate rather than limit, the range of the present invention is defined by claim and its legal equivalents, and be not limited to before this it
Description.
Claims (8)
1. a kind of multiple-arch tunnel middle drift gib arch method for dismounting, which comprises the following steps:
Step 1 is uniformly arranged several type steel supports (3), fashioned iron in the tunnel of middle drift gib arch section to be removed
Support (3) horizontally disposed；One end of type steel support (3) and mid-board (1) elastic connection, the other end of type steel support (3) with to
The elastic connection of arch striking structure (2)；
Step 2, according to remove drilling depth length, determine every time remove drilling depth dismounting cutting line (5)；
Construction drill (6) in step 3, the dismounting cutting line (5) determined in step 2；
Step 4 knocks out the concrete removed on cutting line (5) between adjacent drilling (6), makes to remove to be removed on cutting line (5)
Reinforcing bar and the steel arch-shelf exposure of part arch and main body arch connecting portion；
The type steel support (3) being arranged in step 5, removal step 1 cuts off part arch to be removed and main body arch connecting portion
Reinforcing bar and steel arch-shelf；
Step 6, repeat the above steps 1-5, completes until removing to the gib in middle drift.
2. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 1, which is characterized in that step
Type steel support (3) the horizontal parallel setting of the same section in tunnel, the vertical spacing of adjacent type steel support (3) are 1400- in rapid 1
1600mm；It is 1000-1200mm along the distance between middle drift axis direction adjacent sections.
3. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 1, which is characterized in that step
Caoutchouc elasticity cushion block, type steel support (3) and arch frame structure to be removed are set between rapid 1 medium-sized bracing members (3) and mid-board (1)
(2) caoutchouc elasticity cushion block is set between inner wall.
4. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 3, which is characterized in that rubber
Glue elasticity pad thickness is 80-100mm.
5. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 1, which is characterized in that step
The line of demarcation that cutting line (5) are part arch to be removed and main body arch part arch is removed in rapid 2；Remove cutting line (5) packet
Include the vertical cutting line (52) of the longitudinally cutting line (51) and vertical middle drift axis along middle drift axis；Longitudinally cutting line (51)
For mid-board (1) and steel arch-shelf structure (2) intersection to be removed；Vertical cutting line (52) is for an arch striking part and next time
The handover line of arch striking part.
6. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 1, which is characterized in that step
The diameter of drilling (6) is 180-200mm in rapid 3, the spacing 300-400mm between two neighboring drilling (6).
7. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 1, which is characterized in that step
The artificial concrete for knocking out and being removed on cutting line (5) between drilling (6) using pneumatic pick is used in rapid 4.
8. a kind of multiple-arch tunnel middle drift gib arch method for dismounting according to claim 1, which is characterized in that step
It is waited for using electric welding cutting machine cut except the reinforcing bar and steel arch-shelf connected between dismounting part arch and main body arch in rapid 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244619.XA CN109973123A (en) | 2019-03-28 | 2019-03-28 | A kind of multiple-arch tunnel middle drift gib arch method for dismounting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244619.XA CN109973123A (en) | 2019-03-28 | 2019-03-28 | A kind of multiple-arch tunnel middle drift gib arch method for dismounting |
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| Publication Number | Publication Date |
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| CN109973123A true CN109973123A (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910244619.XA Pending CN109973123A (en) | 2019-03-28 | 2019-03-28 | A kind of multiple-arch tunnel middle drift gib arch method for dismounting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111155526A (en) * | 2020-01-20 | 2020-05-15 | 西安建筑科技大学 | Method for cleaning soil between piles of over-crossing existing subway tunnel |
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-
2019
- 2019-03-28 CN CN201910244619.XA patent/CN109973123A/en active Pending
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| CN102650212A (en) * | 2012-05-04 | 2012-08-29 | 中国十七冶集团有限公司 | Construction method for protecting partition wall in double-arch tunnel through temporary support of middle pilot tunnel |
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| CN111155526A (en) * | 2020-01-20 | 2020-05-15 | 西安建筑科技大学 | Method for cleaning soil between piles of over-crossing existing subway tunnel |
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Application publication date: 20190705 |
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