CN110344833A - Tunnel excavation support structure and method for tunnel construction - Google Patents
Tunnel excavation support structure and method for tunnel construction Download PDFInfo
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- CN110344833A CN110344833A CN201910759371.0A CN201910759371A CN110344833A CN 110344833 A CN110344833 A CN 110344833A CN 201910759371 A CN201910759371 A CN 201910759371A CN 110344833 A CN110344833 A CN 110344833A
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 38
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002689 soil Substances 0.000 claims abstract description 16
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000004567 concrete Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002699 waste material 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- 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
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- 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)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of tunnel excavation support structure and method for tunnel construction, which arranges row's friction pile the following steps are included: being close to existing barricade at tunnel, and is respectively arranged wall and tunnel two sides in tunnel；Stake is being supported away from arrangement at friction pile pre-determined distance, and is making to support stake top lower than road surface elevation, support stake is correspondingly arranged with friction pile；Arrange ground beam, in length and breadth at road surface elevation to connect two neighboring friction pile and adjacent friction pile and support stake；Diagonal brace is applied between support stake and friction pile, friction pile and support stake is made to bear soil pressure jointly；Tunnel middle drift excavation is carried out from inside to outside and applies middle wall；Ecto-entad, left and right hole successively carry out main hole tunnel excavation.Above-mentioned tunnel excavation support structure and method for tunnel construction, excavate and do not destroy existing barricade, uninterrupted traffic into hole, it can be ensured that construction safety and later period operation security, from inside to outside, main hole ecto-entad excavates middle drift, can reduce friction pile soil pressure.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to a kind of tunnel excavation support structure and constructing tunnel side
Method.
Background technique
With a large amount of constructions of highway and railway tunnel, tunnel is all over the place, no longer only passes through the mountain ridge in waste Yezhong,
Also occurs a large amount of Tunnel Engineering in urban construction.These Tunnel Engineering near hole inevitably with city road
Road, barricade, building etc. are existing to have buildings or structures mutually to influence.
By the environmental influence of the special sensitivity in city, Tunnel Engineering takes slope into the side in hole near inlet and outlet cave
Formula, effect on environment is serious, destroys existing ecology, destroys original geology and geomorphology and Rock And Soil stress balance, influences traffic above-ground,
Destroy existing buildings or structures.Tunnel Engineering in urban construction is even more unavoidable when excavating into hole to remove existing set
It applies or Existing reinforced concrete bridge, existing historic reservation, existing road or bridge foundation etc..
Summary of the invention
Based on this, it is necessary to for the problem that traditional method for tunnel construction influences traffic above-ground, existing building is destroyed,
A kind of tunnel excavation support structure and method for tunnel construction are provided.
A kind of tunnel excavation support structure, comprising:
Friction pile is close to existing barricade and arranges a row, and wall and tunnel two sides are correspondingly provided with the friction pile in tunnel；
Stake is supported, with the friction pile arranged for interval, the support stake is correspondingly arranged with the friction pile, and the support
The top of stake is lower than road surface elevation；
Ground beam is arranged in length and breadth at road surface elevation, to connect the two neighboring friction pile and the adjacent friction pile
With the support stake；And
Diagonal brace is connected between the friction pile and the corresponding support stake.
It in one of the embodiments, further include crown beam, the crown beam is set to the top of friction pile described in a row.
It in one of the embodiments, further include crossbeam, the crossbeam is set to the top of tunnel excavation contour line, described
Crossbeam is connected with the friction pile.
Rib column is equipped between the crown beam and the crossbeam in one of the embodiments,.
It in one of the embodiments, further include anchor pole, the anchor pole is set to the top of the friction pile and anchors into
In the soil body, and the friction pile of tunnel two sides is equipped at intervals with multiple anchor poles.
A kind of method for tunnel construction utilizes tunnel excavation support structure described in above-mentioned any one, which is characterized in that packet
Include following steps:
It is close to existing barricade at tunnel and arranges row's friction pile, and is respectively arranged wall and tunnel two in tunnel
Side；
Stake is being supported away from arrangement at the friction pile pre-determined distance, and is making to support stake top lower than road surface elevation, the support
Stake is correspondingly arranged with the friction pile；
Arrange ground beam in length and breadth at road surface elevation, with connect the two neighboring friction pile and the adjacent friction pile and
The support stake；
Diagonal brace is applied between the support stake and the friction pile, the friction pile and the support stake is made to bear soil jointly
Pressure；
Tunnel middle drift excavation is carried out from inside to outside and applies middle wall；
Ecto-entad, left and right hole successively carry out main hole tunnel excavation.
It is close to existing barricade at tunnel in one of the embodiments, and arranges row's friction pile, and is respectively arranged
In tunnel wall and the step of tunnel two sides after further include:
Apply anchor pole in the antiskid stake top of middle wall, mid-board is anchored into, in close proximity to the friction pile edge of tunnel two sides
Stake top is spaced downwards the multiple anchor poles of setting, anchors into the soil body respectively.
Stake is being supported away from arrangement at the friction pile pre-determined distance in one of the embodiments, and is making to support stake top low
In road surface elevation, after the step of each friction pile is correspondingly provided with the support stake further include:
Crown beam is arranged between the friction pile, the crossbeam between cloth friction pile at the top of tunnel excavation contour line, in the hat
Rib column is arranged between beam and the crossbeam.
Above-mentioned tunnel excavation support structure and method for tunnel construction, by the way that the double support pattern of diagonal brace, structural body is arranged
Rationally, load assignment is clear, and Path of Force Transfer is clear for system, securely and reliably, excavates and does not destroy existing barricade into hole, uninterrupted traffic,
It can ensure construction safety and later period operation security.Tunnel excavation is carried out after first supporting, from inside to outside, main hole is by extroversion for middle drift
It inside successively advances wide open digging, friction pile soil pressure when abolishing existing barricade in tunnel contour can be reduced.
Detailed description of the invention
Fig. 1 is the front view of tunnel excavation support structure in an embodiment；
Fig. 2 is the longitudinal section view of tunnel excavation support structure shown in Fig. 1；
Fig. 3 is the flow chart of method for tunnel construction in an embodiment.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, because the invention is not limited by following public specific implementation.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Fig. 1 and Fig. 2 is please referred to, the tunnel excavation support structure in an embodiment is used for the existing barricade of supporting, avoids tunnel
Road destroys existing building when excavating.Specifically, which includes friction pile 100, support stake 200, ground beam
300 and diagonal brace 400.
Friction pile 100 is close to existing barricade and arranges a row, and wall and tunnel two sides are correspondingly provided with friction pile in tunnel
100.Specifically, it is arranged one in tunnel at wall and is used as stress king pile, the two sides in tunnel is respectively arranged a friction pile 100, should
The wall 13m in tunnel of friction pile 100.Further, each at the 100 outside 5m of friction pile of two sides in the same plane to arrange one
Outside soil pressure is kept out in root friction pile 100, assistance.In present embodiment, the sectional dimension of friction pile 100 is 2m × 3m, is resisted
Sliding pile 100 is 38m long, wherein aerial part 19m, under ground portion 19m.
Stake 200 and 100 arranged for interval of friction pile are supported, support stake 200 is correspondingly arranged with friction pile 100, and supports stake 200
Top be lower than road surface elevation.Specifically, the spacing of support stake 200 and friction pile 100 is 13.1m.Support stake 200 quantity be
3, in the corresponding arrangement one of the same axis of friction pile 100 of Zhong Qiangchu, the corresponding same axis of the friction pile 100 of hole two sides is each
Arrangement one.The sectional dimension for supporting stake 200 is 2m × 3m, and supporting the length of the under ground portion of stake 200 is 15m.
Ground beam 300 is arranged in length and breadth at road surface elevation, and ground beam 300 connects two neighboring friction pile 100, connects adjacent
Friction pile 100 and support stake 200, make whole stress.It is that it is anti-that lateral ground beam 300 connects adjacent two
Sliding pile 100, longitudinal ground beam 300 connect friction pile 100 and support column.Specifically, the sectional dimension of ground beam 300 be 3m ×
1.5m。
Diagonal brace 400 is connected between friction pile 100 and corresponding support stake 200, makes to support stake 200 and friction pile 100 total
With receiving soil pressure.Specifically, the angle of diagonal brace 400 and horizontal plane is 45 °, and the sectional dimension of diagonal brace 400 is 2m × 2m.
In order to improve the bearing capacity of friction pile 100, tunnel excavation support structure further includes anchor pole 500, and anchor pole 500 is arranged
In friction pile 100 top and anchor into the soil body, the friction pile 100 of tunnel two sides is equipped at intervals with multiple anchor poles 500.Specifically
Ground applies anchor pole 500 being located at the top of the friction pile 100 that middle wall goes out, anchors into mid-board 9m.In close proximity to portal two sides friction pile
100 tops apply anchor pole 500, to guarantee that diagonal brace 400 applies space, apply second row anchor at the downward 9m of roll bolt 500
Bar 500 anchors into middle weathered rock formation 9m respectively.At the top of outermost friction pile 100 apply anchor pole 500, apart from roll bolt 500 to
Apply totally 3 row's anchor pole 500 at lower 4m, 9m, 13m, anchors into middle weathered rock formation 9m respectively.
In present embodiment, tunnel excavation support structure further includes crown beam 600, and crown beam 600 is set to row's friction pile 100
Top.Specifically, the sectional dimension of crown beam 600 is 3m × 1.5m, and crown beam 600 is sequentially connected five friction piles 100.In close proximity to
Tunnel excavation contour line top position is equipped with crossbeam 700, and crossbeam 700 is located at the lower section of crown beam 600, crossbeam 700 and friction pile 100
It is connected.Specifically, sectional dimension 3m × 1.5m of crossbeam 700.Rib column 800, rib column are equipped between crown beam 600 and crossbeam 700
800 sectional dimension is 1m × 0.6m, and the spacing between two neighboring rib column 800 is 2.2m.
Referring to Fig. 3, the present invention also provides a kind of method for tunnel construction.To realize the method for tunnel construction, use
State tunnel excavation support structure.The method for tunnel construction specifically comprises the following steps:
Step S110: it is close to existing barricade at tunnel and arranges row's friction pile 100, and be respectively arranged in tunnel
Wall and tunnel two sides.
Specifically, row's friction pile 100 is arranged against barricade in tunnel position, a stress is set at wall in tunnel
King pile, sectional dimension 2m × 3m, king pile are total to long 38m, aerial part 19m, under ground portion 19m.Each arrangement 1 of tunnel two sides difference
Friction pile 100, wall king pile 13m, sectional dimension 2m × 3m, stake long 33m, aerial part 19m, under ground portion 14m in.Into one
Step ground, outside soil body pressure is kept out in a piece friction pile 100 of each arrangement at 100 outside 5m of two sides friction pile, assistance in the same plane
Power, sectional dimension 2m × 3m, stake long 33m, aerial part 19m, under ground portion 14m.It, can be anti-when pouring friction pile 100
Casting concrete between sliding pile 100 and barricade, concrete can pour simultaneously with friction pile 100.
In present embodiment, after tunnel goes out and arranges friction pile 100, pushed up being located at the friction pile 100 that middle wall goes out
Portion applies anchor pole 500, anchors into mid-board 9m.Apply anchor pole 500, at the top of portal two sides friction pile 100 to guarantee diagonal brace
400 perform space, apply second row anchor pole 500 at the downward 9m of roll bolt 500, anchor into middle weathered rock formation 9m respectively.?
Apply anchor pole 500 at the top of outermost friction pile 100, applies totally 3 row's anchor pole at roll bolt 500 downward 4m, 9m, 13m
500, middle weathered rock formation 9m is anchored into respectively.
Step S120: stake 200 is being supported away from arrangement at 100 pre-determined distance of friction pile, and is making to support the top of stake 200 lower than road surface
Elevation, support stake 200 are correspondingly arranged with friction pile 100.
Specifically, support stake 200 is 13.1m at a distance from friction pile 100, and the top of support stake 200 is below road surface elevation.
Supporting the part stake of the insertion of stake 200 underground long is 15m.The quantity for supporting stake 200 is three, the corresponding friction pile 100 of middle wall
A support stake 200 is arranged at same axis, respectively arranges one at the corresponding same axis of friction pile 100 of hole two sides.
Certainly, the spacing between stake 200 and friction pile 100 is supported, can specifically be adjusted according to tunnel spacing and span.
Top layout crown beam 600 in present embodiment, after arrangement supports stake 200, on antiskid top.Specifically, it is preced with
The sectional dimension of beam 600 is 3m × 1.5m, and crown beam 600 is sequentially connected five friction piles 100.In close proximity to tunnel excavation contour line top
Position has installed crossbeam 700, and crossbeam 700 is connected with friction pile 100, and crossbeam 700 is located at the lower section of crown beam 600, crossbeam 700 with
Crown beam 600 is parallel.Further, rib column 800 is equipped between crown beam 600 and crossbeam 700, the sectional dimension of rib column 800 is 1m
× 0.6m, the spacing between two neighboring rib column 800 are 2.2m.
Step S130: arranging ground beam 300 in length and breadth at road surface elevation, to connect two neighboring friction pile 100 and adjacent
Friction pile 100 and support stake 200.
Specifically, ground beam 300 is arranged in length and breadth at design road surface elevation, connect lateral ground beam 300 two neighboring anti-
Sliding pile 100, longitudinal ground beam 300 connect friction pile 100 and support stake 200.
Step S140: diagonal brace 400 is applied between the support stake 200 and the friction pile 100, makes the friction pile 100
Soil pressure is born jointly with the support stake 200.
Specifically, apply 3 diagonal braces 400, the section of diagonal brace 400 between 3 supports stake 200 and corresponding friction piles 100
Having a size of 2m × 2m, the angle of diagonal brace 400 and horizontal plane is 45 °.
Step S150: tunnel middle drift excavation is carried out from inside to outside and applies middle wall.
Step S160: ecto-entad, left and right hole successively carry out main hole tunnel excavation.
Above-mentioned tunnel excavation support structure and method for tunnel construction, by the way that the double support pattern of diagonal brace 400, structure is arranged
System is reasonable, and load assignment is clear, and Path of Force Transfer is clear, securely and reliably, excavates and does not destroy existing barricade into hole, not in break off a friendship
It is logical, it can be ensured that construction safety and later period operation security.Carry out tunnel excavation after first supporting, middle drift from inside to outside, main hole by
It successively advances outside to inside wide open digging, 100 soil pressure of friction pile when abolishing existing barricade in tunnel contour can be reduced.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of tunnel excavation support structure characterized by comprising
Friction pile is close to existing barricade and arranges a row, and wall and tunnel two sides are correspondingly provided with the friction pile in tunnel；
Stake is supported, with the friction pile arranged for interval, the support stake is correspondingly arranged with the friction pile, and the support stake
Top is lower than road surface elevation；
Ground beam is arranged in length and breadth at road surface elevation, to connect the two neighboring friction pile and the adjacent friction pile and institute
State support stake；And
Diagonal brace is connected between the friction pile and the corresponding support stake.
2. tunnel excavation support structure according to claim 1, which is characterized in that it further include crown beam, the crown beam setting
The top of the friction pile described in a row.
3. tunnel excavation support structure according to claim 2, which is characterized in that it further include crossbeam, the crossbeam setting
In the top of tunnel excavation contour line, the crossbeam is connected with the friction pile.
4. tunnel excavation support structure according to claim 3, which is characterized in that set between the crown beam and the crossbeam
There is rib column.
5. tunnel excavation support structure according to claim 1, which is characterized in that it further include anchor pole, the anchor pole setting
In the friction pile top and anchor into the soil body, and the friction pile of tunnel two sides is equipped at intervals with multiple anchor poles.
6. a kind of method for tunnel construction utilizes the tunnel excavation support structure as described in claim 1-5 any one, feature
It is, comprising the following steps:
It is close to existing barricade at tunnel and arranges row's friction pile, and is respectively arranged wall and tunnel two sides in tunnel；
Away from arrangement support stake at the friction pile pre-determined distance, and make to support stake top lower than road surface elevation, the support stake and
The friction pile is correspondingly arranged；
Arrange ground beam, in length and breadth at road surface elevation to connect the two neighboring friction pile and the adjacent friction pile and described
Support stake；
Diagonal brace is applied between the support stake and the friction pile, the friction pile and the support stake is made to bear soil pressure jointly
Power；
Tunnel middle drift excavation is carried out from inside to outside and applies middle wall；
Ecto-entad, left and right hole successively carry out main hole tunnel excavation.
7. method for tunnel construction according to claim 6, which is characterized in that be close to existing barricade arrangement at tunnel
One row's friction pile, and after the step of being respectively arranged wall and tunnel two sides in tunnel further include:
Apply anchor pole in the antiskid stake top of middle wall, anchors into mid-board, the friction pile in close proximity to tunnel two sides is along stake top
Multiple anchor poles are arranged in interval downwards, anchor into the soil body respectively.
8. method for tunnel construction according to claim 6, which is characterized in that away from arrangement at the friction pile pre-determined distance
Stake is supported, and makes to support stake top lower than road surface elevation, is gone back after the step of each friction pile is correspondingly provided with the support stake
Include:
Arrange crown beam between the friction pile, the crossbeam between cloth friction pile at the top of tunnel excavation contour line, in the crown beam and
Rib column is arranged between the crossbeam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910759371.0A CN110344833A (en) | 2019-08-16 | 2019-08-16 | Tunnel excavation support structure and method for tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910759371.0A CN110344833A (en) | 2019-08-16 | 2019-08-16 | Tunnel excavation support structure and method for tunnel construction |
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