CN110410110A - A kind of large cross-section tunnel composite lining and its construction method - Google Patents
A kind of large cross-section tunnel composite lining and its construction method Download PDFInfo
- Publication number
- CN110410110A CN110410110A CN201910786603.1A CN201910786603A CN110410110A CN 110410110 A CN110410110 A CN 110410110A CN 201910786603 A CN201910786603 A CN 201910786603A CN 110410110 A CN110410110 A CN 110410110A
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- tunnel
- steelframe
- steel pipe
- large cross
- steel
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- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 91
- 239000010959 steel Substances 0.000 claims abstract description 91
- 239000004567 concrete Substances 0.000 claims abstract description 32
- 238000009412 basement excavation Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims description 16
- 210000002421 cell wall Anatomy 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 claims description 5
- 239000011378 shotcrete Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 description 3
- 230000010412 perfusion Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
Abstract
The invention belongs to technical field of tunnel construction, and in particular to a kind of large cross-section tunnel composite lining, including pay protection structure and more Pin steelframes in advance, every Pin steelframe is bent to form annular along tunnel contour line；Paying protection structure in advance includes along the spaced multiple steel pipes of tunnel contour line；Multiple steel pipes are fixed on the outside of tunnel clearance profile by more Pin steelframes；Concrete is filled between steelframe, in steelframe and in steel pipe；Its construction method: it before tunnel excavation, constructs along the multiple steel pipes of tunnel contour line arranged for interval；Tunnel excavation is carried out, after the completion of each circulation is excavated, sets up a Pin steelframe, and steel pipe is fixed close to the side in tunnel with steelframe；It is using concrete that the gap filling between steelframe, in steelframe and in steel pipe is closely knit, form composite lining.The present invention, which is mentioned, converts permanent bearing structure for leading pre-supporting structural-load-carrying capacity, reduces the gib and permanent structure project amount of tunnel-liner, significantly improves structure economics.
Description
Technical field
The invention belongs to technical field of tunnel construction, and in particular to a kind of large cross-section tunnel composite lining and its construction party
Method.
Background technique
Span is big, and structural internal force is big since it is excavated for large cross-section tunnel, and it is mostly big so as to cause risk when construction to excavate substep,
Process is more, long in time limit, becomes the controlling node in Tunnel Engineering.Currently, large cross-section tunnel is directed to, mainly by using more
Kind pre-reinforcement measure excavates span by being divided into muti-piece to reduce excavation face every time, and the division of labor raising of multi-process harmonious orderly is applied
Work safety and construction speed.By taking a kind of large-section tunnel construction method shown in FIG. 1 as an example, applies man-hour requirement and first excavating model
Upper part sets pipe canopy 100, then first excavates to the base tunnel of two sides, and setting is located at tunnel contour rapidly after the completion of excavating
On preliminary bracing and the gib on the inside of tunnel, the then part among step excavation, one step of every completion, which is excavated, to be needed
Steelframe body 200 and gib 300 are applied at once.After remove the gib in tunnel again after the completion of full face tunneling,
And secondary lining 400 is poured, complete an excavation circulation.Other existing construction methods are similar, only in excavation face
Difference on partitioning scheme and advance reinforcement measure.
Although the above method can solve the excavation safety problem of large cross-section tunnel, but there is problems in that 1) paying in advance
It is longer and costly to protect the working procedure time, and bearing capacity cannot be provided after the completion of structure construction for structure；2) it opens step by step
It digs between process and interferes with each other, and operating space is narrow, process time-consuming is more compared with general excavation method, and construction speed is slower；3) just
It is later that phase support bracket is set as ring, is unfavorable for control structure deformation, especially in soft stratum, local deformation is difficult to effectively control
System, finally results in tunnel clearance and invades limit；4) since preliminary bracing rigidity is lower, finally formed lining cutting is with secondary lining stress
It is main, cause lining thickness larger, outline excavation increases, and structure is uneconomical.
Summary of the invention
In order to overcome the shortcomings of the prior art described above, the object of the present invention is to provide a kind of large cross-section tunnel combined types
Lining cutting and its construction method convert permanent bearing structure for leading pre-supporting structural-load-carrying capacity, reduce tunnel-liner
Gib and permanent structure project amount, reduce cost, accelerate construction progress.
To achieve the above object, the technical scheme is that a kind of large cross-section tunnel composite lining, including pre support
Structure and along the spaced more Pin steelframes in length of tunnel direction, steelframe described in every Pin is along tunnel contour line bent cyclization
Shape；The protection structure of paying in advance includes along the spaced multiple steel pipes of tunnel contour line；Multiple steel pipes are fixed by more Pin steelframes
In the outside of tunnel clearance profile；Concrete is filled between the steelframe, in the steelframe and in the steel pipe
Further, each steel pipe is equipped with U-type groove steel close to the side in tunnel, and the notch of the U-type groove steel is described in
Steel pipe, the internal groove bottom of the U-type groove steel and two cell walls are connect with the steel pipe, the outer slot bottom of the U-type groove steel with it is described
Steelframe connection.
Further, the tunnel side of the steelframe is equipped with secondary lining.
Further, the diameter of the steel pipe is 1~2m.
Further, the distance between two neighboring steel pipe is 0.3~0.5m.
Further, the distance between adjacent two Pin steelframe is 0.3~0.5m.
The present invention also provides a kind of construction methods of large cross-section tunnel composite lining, include the following steps:
1) before tunnel excavation, the steel pipe arranged along length of tunnel direction of constructing, and multiple steel pipes are along tunnel contour line interval cloth
It sets；
2) tunnel excavation is carried out, after the completion of each circulation is excavated, sets up a Pin steelframe, and side and steel by steel pipe close to tunnel
Frame is fixed；
3) using concrete that the gap filling between steelframe, in steelframe and in steel pipe is closely knit, form composite lining.
Further, U-shaped in side setting of each steel pipe close to tunnel after the completion of each circulation is excavated in step 2
Channel steel, and the internal groove bottom of U-type groove steel and two cell walls being fixed with corresponding steel pipe, then set up steelframe, and by U-type groove steel
Outer slot bottom is fixed with steelframe.
Further, Concrete Filled uses gunite concrete or form concrete in step 3), reaches to concrete and sets
After counting intensity, construction secondary lining or secondary lining of not constructing are selected according to requirement of engineering.
Further, push bench process or shield construction steel pipe are used in step 1), are used in step 2 according to geological conditions
Full face tunneling or a point multiple excavation faces are excavated.
Compared with prior art, the invention has the following advantages:
(1) pay protection structure of the present invention using the circle steel pipe being arranged along tunnel excavation profile as tunnel, and in steel pipe
The rigidity of structure can be improved in concrete perfusion, effectively supports the native rock load of tunnel surrounding；
(2) present invention welds steel pipe and steelframe after excavation, and the closely knit combination of fill concrete forms composite lining structure,
Permanent bearing structure is converted by leading pre-supporting structural-load-carrying capacity, reduces gib and the permanent structure of tunnel-liner
Project amount significantly improves structure economics；
(3) large cross-section tunnel composite lining structure construction space provided by the invention is big, speed of application block, and safety is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the existing large cross-section tunnel liner structure provided in background of invention；
Fig. 2 is the steel pipe layout drawing of large cross-section tunnel composite lining provided in an embodiment of the present invention；
Fig. 3 is the schematic longitudinal section of large cross-section tunnel composite lining provided in an embodiment of the present invention；
Fig. 4 is the schematic cross-sectional view of large cross-section tunnel composite lining provided in an embodiment of the present invention；
Fig. 5 is the steel pipe of large cross-section tunnel composite lining provided in an embodiment of the present invention and the welding schematic diagram of steelframe；
In figure: 1, steel pipe, 2, tunnel clearance profile, 3, steelframe, 4, concrete, 5, Rock And Soil, 6, excavation face, 7, U-type groove steel,
100, Guan Peng, 200, steelframe body, 300, gib, 400, secondary lining.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more of the features；In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or
It is more than two.
As shown in figs 2-4, the embodiment of the present invention provides a kind of large cross-section tunnel composite lining, including pays protection structure in advance
And along the spaced more Pin steelframes 3 in length of tunnel direction, steelframe 3 described in every Pin is along tunnel contour line bent cyclization
Shape；The protection structure of paying in advance includes along the spaced multiple steel pipes 1 of tunnel contour line；Multiple steel pipes 1 are solid by more Pin steelframes 3
Due to the outside of tunnel clearance profile 2；Coagulation is filled between the steelframe 3, in the steelframe 3 and in the steel pipe 1
Soil 4.The present embodiment encloses pre support system of the steel pipe 1 as tunnel, and steel pipe 1 before excavation, along tunnel excavation profile construction one
Interior concrete perfusion 4, can be improved the rigidity of structure, effectively support the native rock load of tunnel surrounding；It will be each after excavating simultaneously
Steel pipe 1 is welded with more Pin steelframes 3, and is combined to form composite lining structure with certain thickness concrete 4, not only sufficiently sharp
Structure economics are improved with the supporting intensity of steel pipe 1, and may be constructed permanent bearing structure, significantly improve lining construction speed
Degree, effective control structure deformation.
Preferably, as shown in figure 5, each steel pipe 1 is equipped with U-type groove steel 7, the U-type groove steel 7 close to the side in tunnel
Notch connect towards the steel pipe 1, the internal groove bottom of the U-type groove steel 7 and two cell walls with the steel pipe 1, the U-type groove
The outer slot bottom of steel 7 is connect with the steelframe 3.Under the protection of steel pipe 1, full face tunneling or benching tunnelling method can be used depending on geological conditions
It excavates, every excavation certain depth applies immediately by steelframe 3 and the composite lining formed with concrete 4, and by every Pin steelframe 3
It is welded into an entirety by the steel pipe 1 of U-type groove steel 7 and advance support, forms beam body system in length and breadth, quickly constitutes permanent carrying knot
Structure.
As an implementation, the steelframe is equipped with secondary lining close to the side in tunnel.It is filled in the present embodiment
Concrete 4 can use gunite concrete or be replaced with form concrete, while can add secondary liner as needed,
Secondary liner can not also be added.
Preferably, the diameter of the steel pipe 1 is 1~2m；The distance between two neighboring steel pipe 1 is 0.3~0.5m；It is adjacent
The distance between two Pin steelframes 3 are 0.3~0.5m.The present embodiment is used as using long-size steel tube 1 and pays protection structure in advance, and in steel pipe
Middle fill concrete 4, can provide biggish support force, it is not necessary to carry out complicated step excavation process, improve construction period
The safety of tunnel excavation and speed of application.
For the prior art large cross-section tunnel excavating sequences are more, long in time limit, the rigidity of structure is insufficient, liner structure is uneconomical
The problems such as, the present embodiment also provides a kind of construction method of large cross-section tunnel composite lining, as shown in Figure 2-5, including it is as follows
Step:
1) before tunnel excavation, the steel pipe 1 arranged using push bench process or shield construction along length of tunnel direction, and multiple steel pipes
1 along tunnel contour line arranged for interval, and reserved composite lining applies space；
2) after the completion of steel pipe 1 is all constructed, tunnel excavation is carried out, according to geological conditions using full face tunneling or point multiple excavations
Face 6 is excavated, and after the completion of each circulation is excavated, sets up a Pin steelframe 3, and U-type groove steel 7 is arranged close to the side in tunnel in each steel pipe 1,
And the internal groove bottom of U-type groove steel 7 and two cell walls are welded and fixed with corresponding steel pipe 1, then set up steelframe 3, and by U-type groove steel
7 outer slot bottom is welded and fixed with steelframe 3, is allowed to be formed beam body system in length and breadth, common to bear ground load；
3) it is using concrete 4 that the gap filling between steelframe 3, in steelframe 3 and in steel pipe 1 is close after the completion of steelframe 3 is set up
Real, the filling of concrete 4 uses gunite concrete or form concrete, and intensity should meet related specifications；
According to above-mentioned steps, final steel pipe 1, steelframe 3 and concrete 4 collectively form composite lining；Wherein, it is answered between steelframe 3
Simultaneously completely cementing using 4 dense packing effect of concrete, composite lining strength and stiffness should be determined by calculation, and meet related rule
Model and construction operation security requirement；
4) after concrete 4 reaches design strength, construction secondary lining or secondary lining of not constructing are selected according to requirement of engineering.
The present embodiment welds steel pipe and steelframe after excavation, and the closely knit combination of fill concrete forms composite lining knot
Leading pre-supporting structural-load-carrying capacity is converted permanent bearing structure by structure, reduces the gib of tunnel-liner and permanent
Structural Engineering amount significantly improves structure economics, and can significantly improve lining construction speed, effective control structure deformation；
Under the premise of ensureing large cross-section tunnel construction safety, it is more to can solve large cross-section tunnel working procedure, long in time limit, and cost is high,
The problems such as preliminary bracing rigidity is weaker, and structure is uneconomical.
The above is only some basic principles of the invention, not to composite lining and its construction method of the invention
Carry out the limitation of any specific shape, material, process, therefore all corresponding modifications that may be utilized and equivalent,
Belong to the applied the scope of the patents of the present invention.
Claims (10)
1. a kind of large cross-section tunnel composite lining, it is characterised in that: including paying protection structure in advance and between length of tunnel direction
Every more Pin steelframes of setting, steelframe described in every Pin is bent to form annular along tunnel contour line；The protection structure of paying in advance includes edge
The spaced multiple steel pipes of tunnel contour line；Multiple steel pipes are fixed on the outside of tunnel clearance profile by more Pin steelframes；Institute
State between steelframe, in the steelframe and in the steel pipe filled with concrete.
2. a kind of large cross-section tunnel composite lining as described in claim 1, it is characterised in that: each steel pipe is close to tunnel
Side be equipped with U-type groove steel, the notch of the U-type groove steel is towards the steel pipe, the internal groove bottom of the U-type groove steel and two slots
Wall is connect with the steel pipe, and the outer slot bottom of the U-type groove steel is connect with the steelframe.
3. a kind of large cross-section tunnel composite lining as described in claim 1, it is characterised in that: the tunnel side of the steelframe is set
There is secondary lining.
4. a kind of large cross-section tunnel composite lining as described in claim 1, it is characterised in that: the diameter of the steel pipe is 1
~2m.
5. a kind of large cross-section tunnel composite lining as described in claim 1, it is characterised in that: between two neighboring steel pipe
Distance is 0.3~0.5m.
6. a kind of large cross-section tunnel composite lining as described in claim 1, it is characterised in that: between adjacent two Pin steelframe
Distance is 0.3~0.5m.
7. a kind of construction method of large cross-section tunnel composite lining, which comprises the steps of:
1) before tunnel excavation, the steel pipe arranged along length of tunnel direction of constructing, and multiple steel pipes are along tunnel contour line interval cloth
It sets；
2) tunnel excavation is carried out, after the completion of each circulation is excavated, sets up a Pin steelframe, and side and steel by steel pipe close to tunnel
Frame is fixed；
3) using concrete that the gap filling between steelframe, in steelframe and in steel pipe is closely knit, form composite lining.
8. a kind of construction method of large cross-section tunnel composite lining as claimed in claim 7, it is characterised in that: step 2
In, after the completion of each circulation is excavated, U-type groove steel is set close to the side in tunnel in each steel pipe, and by the internal groove bottom of U-type groove steel
It is fixed with corresponding steel pipe with two cell walls, then sets up steelframe, and the outer slot bottom of U-type groove steel is fixed with steelframe.
9. a kind of construction method of large cross-section tunnel composite lining as claimed in claim 7, it is characterised in that: in step 3)
Concrete Filled is selected after concrete reaches design strength according to requirement of engineering using gunite concrete or form concrete
Construction secondary lining or secondary lining of not constructing.
10. a kind of construction method of large cross-section tunnel composite lining as claimed in claim 7, it is characterised in that: step 1)
It is middle to use push bench process or shield construction steel pipe, full face tunneling is used according to geological conditions in step 2 or divides multiple excavation faces
It excavates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786603.1A CN110410110A (en) | 2019-08-23 | 2019-08-23 | A kind of large cross-section tunnel composite lining and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786603.1A CN110410110A (en) | 2019-08-23 | 2019-08-23 | A kind of large cross-section tunnel composite lining and its construction method |
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Family
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| CN201910786603.1A Pending CN110410110A (en) | 2019-08-23 | 2019-08-23 | A kind of large cross-section tunnel composite lining and its construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958323A (en) * | 2021-10-13 | 2022-01-21 | 中建三局第一建设工程有限责任公司 | Large-section tunnel construction method and supporting structure |
| CN113982630A (en) * | 2021-10-29 | 2022-01-28 | 成都未来智隧科技有限公司 | Tunnel supporting structure |
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