CN109083658A - Using concrete filled steel tube as the Tunnel Second Lining structure and its construction method of skeleton - Google Patents
Using concrete filled steel tube as the Tunnel Second Lining structure and its construction method of skeleton Download PDFInfo
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- CN109083658A CN109083658A CN201810674143.9A CN201810674143A CN109083658A CN 109083658 A CN109083658 A CN 109083658A CN 201810674143 A CN201810674143 A CN 201810674143A CN 109083658 A CN109083658 A CN 109083658A
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- steel tube
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 261
- 239000010959 steel Substances 0.000 title claims abstract description 261
- 239000004567 concrete Substances 0.000 title claims abstract description 125
- 238000010276 construction Methods 0.000 title claims abstract description 54
- 239000011210 fiber-reinforced concrete Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims description 29
- 238000005266 casting Methods 0.000 claims description 9
- 230000011218 segmentation Effects 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 230000015271 coagulation Effects 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 4
- 239000011372 high-strength concrete Substances 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000009415 formwork Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000009416 shuttering Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004078 waterproofing Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
Abstract
The present invention relates to using concrete filled steel tube as the Tunnel Second Lining structure and its construction method of skeleton, belong to constructing tunnel field.The present invention is using concrete filled steel tube arch as Tunnel Second Lining skeleton, and fixed form pours steel fiber reinforced concrete on concrete filled steel tube arch, and concrete filled steel tube arch and steel fiber reinforced concrete are collectively constituted Tunnel Second Lining.The present invention is suitable for variable cross-section Tunnel Second Lining Construction, overcomes conventional template trolley the variable cross-section constructing tunnel bad adaptability the shortcomings that；, the advantages such as ductility good, anti-seismic performance superior high with bearing capacity, and easy for construction, short time limit, to occupy tunnel space small, small to the construction interference of other processes, and multiple working faces is facilitated continuously to construct.The present invention is suitable for preferable II, III, the IV grade of country rock location lining construction of self-stability, especially suitable for tunnel Widening on Curve section, the construction with the variable cross-sections such as widened section tunnel of stopping in emergency, has significant technical advantage and preferable economic benefit.
Description
Technical field
The present invention relates to using concrete filled steel tube as the Tunnel Second Lining structure and its construction method of skeleton, belongs to tunnel and apply
Work technical field.
Background technique
Traditional tunnel double-lining construction uses reinforced concrete structure, while carrying out pouring coagulation using lining template trolley for baffle
Soil construction, trolley behind narrow space, steel flxer skill is complicated, therefore the cross influence between work post is big, long construction period,
Construction quality is difficult to control；Further, since the outer profile of formwork jumbo is fixed, therefore in the Widening on Curve section in tunnel, tight
The changed location in the Internal peripheries such as anxious lay-by section, formwork jumbo generally require the additional body template on the outside of template and carry out
Widening could be applicable in, and time-consuming for work progress, and process is sufficiently complex.In Tunnel Second Lining Construction, how Schaltisch is cracked
The inherent shortcoming of vehicle cast-in-place concrete construction technology, seeks that one kind occupies little space, speed of application is fast, is suitable for a variety of section shapes
The construction method of shape has become current constructing tunnel field problem in the urgent need to address.
Summary of the invention
The technical problem to be solved by the present invention is the present invention provide it is a kind of using concrete filled steel tube as the secondary lining in the tunnel of skeleton
Structure and its construction method are built, is to overcome existing reinforced concrete structure and Tunnel Second Lining formwork jumbo cast-in-place construction
The inherent shortcoming of technique, overcomes that reinforced concrete lining layer steel flxer sequence is complicated, long in time limit, quality is difficult to control, customer service mould
The disadvantages of pallet vehicle cast-in-place construction technique occupied space is big, long construction period, section bad adaptability；The present invention proposes one kind
Save space, speed of application are fast, section it is adaptable using concrete filled steel tube as the Tunnel Second Lining structure of skeleton and
Its construction method fundamentally improves the construction technology of Tunnel Second Lining, helps speed up construction speed, saving is constructed into
This.
The technical scheme is that: it is a kind of using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is mixed using steel pipe
Solidifying soil arch is as Tunnel Second Lining skeleton, and fixed form pours steel fiber reinforced concrete on concrete filled steel tube arch, by steel
Pipe concrete arch and steel fiber reinforced concrete collectively constitute Tunnel Second Lining.
The present invention specifically includes arch anchor 2, steel pipe by the Tunnel Second Lining structure of skeleton of concrete filled steel tube
Concrete arch 3, Tunnel Second Lining template 4, template anchoring piece 6 and concreting window 7；Outside Tunnel 1
Portion's country rock reserves arch anchor 2, will be segmented prefabricated Steel tubular arch-frame working face carry out it is assembled after have the abutting tunnel of spacing
The surface of road preliminary bracing 1 is fixed, and casting concrete forms concrete filled steel tube arch 3 inside Steel tubular arch-frame；Tunnel two
Secondary lining shuttering 4 is fixed by the template anchoring piece 6 reserved on concrete filled steel tube arch 3, passes through Tunnel Second Lining mould
The reserved concreting window 7 in 4 surface of plate pours steel fiber reinforced concrete, steel fibre coagulation between concrete filled steel tube arch 3
Soil is formed together the secondary lining in tunnel with concrete filled steel tube arch 3.
The Steel tubular arch-frame is close to the setting of preliminary bracing surface by anchor connection device, and the spacing between Steel tubular arch-frame is
0.8-1.5m, 3 diameter of concrete filled steel tube arch are 20-40cm, and specific spacing is determined according to tunnel surrounding grade by Structure Calculation
It is fixed.
Steel tubular arch-frame segmentation precast assembly forms, a complete Steel tubular arch-frame be divided into four segments be segmented it is prefabricated,
Steel pipe walls thickness 1-2cm is segmented prefabricated Steel tubular arch-frame using the connection of arch connecting flange 5 and forms an annular arch, every
Closable concrete casting hole is reserved in one section of Steel tubular arch-frame top.
The size of the Steel tubular arch-frame is arbitrarily prefabricated according to the variation of headroom in tunnel, to meet the need of tunnel changes of section
It asks.
The shape of the Steel tubular arch-frame is round steel pipe or square steel tube.
Template anchoring piece 6 is installed outside the Steel tubular arch-frame additional, Tunnel Second Lining template 4 is used by template anchoring piece 6
Bolt is fixed on concrete filled steel tube arch 3, and Tunnel Second Lining template 4 is divided into four pieces, and each one piece of two sides abutment wall, two sides arch
Each one piece, the width of single form is suitable with the width of three Pin arches.
The top of every Tunnel Second Lining template 4 is provided with the switchable formula window of two 50cm × 50cm, is used for coagulation
Soil is poured and is vibrated.
Further, after concrete strength reaches code requirement, bolt is unscrewed, removes Tunnel Second Lining from top to bottom
Template 4, template move to next working face and are reused.
It is a kind of using concrete filled steel tube as the construction method of the Tunnel Second Lining structure of skeleton: according to tunnel before constructing tunnel
The Internal periphery of road preliminary bracing 1 and the Internal periphery of secondary lining are segmented prefabricated Steel tubular arch-frame, in 1 construction time of Tunnel
Between, in country rock internal reservation arch anchor 2, it will be segmented after prefabricated Steel tubular arch-frame is transported to working face and be attached, then
There is the Internal periphery of the abutting Tunnel 1 of spacing to be fixed using pre-buried anchor connection device, is then infused in steel pipe
Enter concrete and form concrete filled steel tube arch 3, template anchoring piece 6 is reserved on concrete filled steel tube arch 3, is poured in concrete filled steel tube
After the completion of building, Tunnel Second Lining template 4 is fixed on Steel tubular arch-frame by template anchoring piece 6, passes through template reserved window
Pour steel fiber reinforced concrete between Steel tubular arch-frame, it is secondary that steel fiber reinforced concrete with concrete filled steel tube arch 3 is formed together tunnel
Lining cutting.
Specific step is as follows for the method:
Step1, arch anchor 2 of constructing first when applying Tunnel 1, the anchored end anchor of arch anchor 2
Gu linkage section stretches out outside Tunnel 1 in tunnel surrounding；
Step2, according to the Internal periphery of Tunnel 1 and the Internal periphery of Tunnel Second Lining, blanking is segmented outside tunnel
Prefabricated Steel tubular arch-frame；
Step3, will be segmented prefabricated Steel tubular arch-frame be transported to working face carry out it is assembled, Steel tubular arch-frame and Tunnel 1 it
Between first lay splash guard, assembled good tubular arch is erected on 1 surface of Tunnel, passes through anchor connection device and is close to tunnel
Preliminary bracing 1 surface in road is fixed, and high-strength concrete is then poured inside Steel tubular arch-frame, forms concrete filled steel tube arch 3；
Step4, the every certain distance in Steel tubular arch-frame surface reserve template anchoring piece 6 using casing bit, in concrete filled steel tube arch 3
Fragment template is fixed on Steel tubular arch-frame by template anchoring piece 6 after forming intensity；
Step5, steel fiber reinforced concrete is poured between Steel tubular arch-frame by the concreting window 7 that template surface is reserved and is shaken
Puddling is real, and steel fiber reinforced concrete and concrete filled steel tube arch 3 are formed together Tunnel Second Lining structure；
After Step6, band Strength of Steel Fiber Reinforced Concrete reach standard, Tunnel Second Lining template 4 is removed, next section of secondary lining is continued
The construction of block.
In the step Step2, Steel tubular arch-frame diameter is 20-40cm, is fixed in tunnel double-lining by arch anchor 2
Preliminary bracing side, the longitudinal pitch 0.8-1.5m between each Pin arch are filled using steel fiber reinforced concrete between Steel tubular arch-frame.
The diameter of steel pipe, thickness, the spacing between tubular arch are both needed to determine after being checked according to the difference of tunnel surrounding grade.
In the step Step2, four sections of precast assemblies of Steel tubular arch-frame point are formed, before Steel tubular arch-frame is fixed first at the beginning of tunnel
Splash guard is laid between phase supporting and Steel tubular arch-frame, placing concrete hole, and each section of steel pipe are reserved in each section of Steel tubular arch-frame top
It is connected between arch using arch connecting flange.
In the step Step3, the concrete poured inside Steel tubular arch-frame is the high-strength concrete that intensity is greater than C50.
In the step Step4, four installations of template point, left and right abutment wall is each a piece of, and left and right arch is each a piece of, the width of template
It spends wide with the distance between three Pin steel arch-shelfs.
In the step Step5, steel fiber reinforced concrete is poured first pour inverted arch and abutment wall according to sequence from low to high after
Arch part is poured, both sides symmetrically pour simultaneously.
Shown anchor connection device 2, anchored end is anchor rod anchored in tunnel surrounding using pack, and connecting pin extend out to initial stage
Outside supporting, connected between connecting pin and anchored end using multiply high strength steel strand.Steel strand wires pass through preliminary bracing and splash guard,
Reinforcement water-proofing treatment is done with glue in the position that steel strand wires pass through splash guard.
The Steel tubular arch-frame is made of seamless steel pipe, and steel pipe walls are with a thickness of 1-2cm.
The Tunnel Second Lining template 4 is fixed with bolts on template anchoring piece 6, and work at present surface construction is complete
At template disassembly can be installed to subsequent work face after reaching design strength by concrete, be reused.
Construction procedure Step1-the Step6 can interfere between each other very little in multiple working face synchronous constructions, can be real
The simultaneously and rapidly construction of existing Tunnel Second Lining.
The beneficial effects of the present invention are:
1, the present invention instead of conventional tunnel construct in reinforced concrete structure, construction technology do not need using lining shuttering platform
Vehicle does not need falsework yet；Effectively prevent the space assembling reinforcement of formwork jumbo back narrow expend plenty of time, matter
Amount, which is difficult to control, waits shortcomings；Concrete filled steel tube arch, to the cuff effect of contraction of core concrete, makes core by steel pipe
Concrete is in three dimension stress state, so that core concrete be made to have higher compression strength and compression deformation ability, improves
Tunnel total bearing capacity, saves a large amount of reinforcing bars, has that high bearing capacity, light-weight, simple to install, ductility is good, endurance, resistance to punching
It the superior workability such as hits, there is significant economic value；
2, the present invention can effectively overcome formwork jumbo to be not suitable with the defect of variable cross-section constructing tunnel, can be applicable in various tunnel lubrication grooves
Wide size, is accelerated construction progress by prefabricated construction, and liner structure proposed by the present invention and construction method greatly reduce process,
The continuity that ensure that work surface construction solves in the lining work progress of conventional tunnel two and is difficult with lacking for variable cross-section construction
It falls into.
Detailed description of the invention
Fig. 1 is overall schematic of the invention；
Fig. 2 is longitudinal axis line profile of the invention；
Fig. 3 is template installation section structural schematic diagram of the invention；
Fig. 4 is single concrete filled steel tube arch flanged joint schematic diagram of the invention.
Each label in Fig. 1-4: 1- Tunnel, 2- arch anchor, 3- concrete filled steel tube arch, the tunnel 4- two
Secondary lining shuttering, 5- arch connecting flange, 6- template anchoring piece, 7- concreting window, 8- leftwall section, 9- RightWall
Section, the arch 10- section, 11- inverted arch section.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the invention will be further described.
Embodiment 1: it is as shown in Figs 1-4, a kind of using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, using steel pipe
Concrete arch is as Tunnel Second Lining skeleton, and fixed form pours steel fiber reinforced concrete on concrete filled steel tube arch, will
Concrete filled steel tube arch and steel fiber reinforced concrete collectively constitute Tunnel Second Lining.
Further, the present invention specifically includes arch anchoring dress by the Tunnel Second Lining structure of skeleton of concrete filled steel tube
Set 2, concrete filled steel tube arch 3, Tunnel Second Lining template 4, template anchoring piece 6 and concreting window 7；In tunnel initial-stage
1 outside country rock of supporting reserves arch anchor 2, and will be segmented prefabricated Steel tubular arch-frame has spacing after working face carries out assembly
The surface for being close to Tunnel 1 is fixed, and casting concrete forms concrete filled steel tube arch 3 inside Steel tubular arch-frame；
Tunnel Second Lining template 4 is fixed by the template anchoring piece 6 reserved on concrete filled steel tube arch 3, secondary by tunnel
The reserved concreting window 7 in 4 surface of lining shuttering pours steel fiber reinforced concrete between concrete filled steel tube arch 3, and steel is fine
Dimension concrete and concrete filled steel tube arch 3 are formed together the secondary lining in tunnel.
Further, the Steel tubular arch-frame by anchor connection device be close to preliminary bracing surface setting, Steel tubular arch-frame it
Between spacing be 0.8m, 3 diameter of concrete filled steel tube arch is 20cm, and specific spacing passes through Structure Calculation according to tunnel surrounding grade
It determines.
Further, the Steel tubular arch-frame segmentation precast assembly forms, and a complete Steel tubular arch-frame is divided into four segments
It is segmented prefabricated, steel pipe walls thickness 1cm, prefabricated Steel tubular arch-frame is segmented using the connection of arch connecting flange 5 and forms a round arch
Frame has reserved closable concrete casting hole on each section of Steel tubular arch-frame top.
Further, the size of the Steel tubular arch-frame is arbitrarily prefabricated according to the variation of headroom in tunnel, is cut with meeting tunnel
The demand of face variation.
Further, the shape of the Steel tubular arch-frame is round steel pipe or square steel tube.
Further, template anchoring piece 6 has been installed additional outside the Steel tubular arch-frame, Tunnel Second Lining template 4 passes through template
Anchoring piece 6 is fixed by bolts on concrete filled steel tube arch 3, and Tunnel Second Lining template 4 is divided into four pieces, two sides abutment wall each one
Block, each one piece of two sides arch, the width of single form is suitable with the width of three Pin arches.
Further, the top of every Tunnel Second Lining template 4 is provided with the switchable formula window of two 50cm × 50cm,
Pouring and vibrate for concrete.
Further, after concrete strength reaches code requirement, bolt is unscrewed, removes Tunnel Second Lining from top to bottom
Template 4, template move to next working face and are reused.
It is a kind of using concrete filled steel tube as the construction method of the Tunnel Second Lining structure of skeleton: according to tunnel before constructing tunnel
The Internal periphery of road preliminary bracing 1 and the Internal periphery of secondary lining are segmented prefabricated Steel tubular arch-frame, in 1 construction time of Tunnel
Between, in country rock internal reservation arch anchor 2, it will be segmented after prefabricated Steel tubular arch-frame is transported to working face and be attached, then
There is the Internal periphery of the abutting Tunnel 1 of spacing to be fixed using pre-buried anchor connection device, is then infused in steel pipe
Enter concrete and form concrete filled steel tube arch 3, template anchoring piece 6 is reserved on concrete filled steel tube arch 3, is poured in concrete filled steel tube
After the completion of building, Tunnel Second Lining template 4 is fixed on Steel tubular arch-frame by template anchoring piece 6, passes through template reserved window
Pour steel fiber reinforced concrete between Steel tubular arch-frame, it is secondary that steel fiber reinforced concrete with concrete filled steel tube arch 3 is formed together tunnel
Lining cutting.
Further, specific step is as follows for the method:
Step1, arch anchor 2 of constructing first when applying Tunnel 1, the anchored end anchor of arch anchor 2
Gu linkage section stretches out outside Tunnel 1 in tunnel surrounding；
Step2, according to the Internal periphery of Tunnel 1 and the Internal periphery of Tunnel Second Lining, blanking is segmented outside tunnel
Prefabricated Steel tubular arch-frame；
Step3, will be segmented prefabricated Steel tubular arch-frame be transported to working face carry out it is assembled, Steel tubular arch-frame and Tunnel 1 it
Between first lay splash guard, the steel strand wires being connect with arch anchor 2 pass through splash guard position need using glue it is not strong
Measure carries out water-proofing treatment；Assembled good tubular arch is erected on 1 surface of Tunnel, is close to by anchor connection device
1 surface of Tunnel is fixed, and high-strength concrete is then poured inside Steel tubular arch-frame, forms concrete filled steel tube arch
3；
Step4, the every certain distance in Steel tubular arch-frame surface reserve template anchoring piece 6 using casing bit, in concrete filled steel tube arch 3
Fragment template is fixed on Steel tubular arch-frame by template anchoring piece 6 after forming intensity；
Step5, steel fiber reinforced concrete is poured between Steel tubular arch-frame by the concreting window 7 that template surface is reserved and is shaken
Puddling is real, and steel fiber reinforced concrete and concrete filled steel tube arch 3 are formed together Tunnel Second Lining structure；
After Step6, band Strength of Steel Fiber Reinforced Concrete reach standard, Tunnel Second Lining template 4 is removed, next section of secondary lining is continued
The construction of block.
Further, in the step Step2, Steel tubular arch-frame diameter is 20cm, is fixed on tunnel by arch anchor 2
Two serve as a contrast in preliminary bracing side, the longitudinal pitch 0.8m between each Pin arch filled out using steel fiber reinforced concrete between Steel tubular arch-frame
It fills.The diameter of steel pipe, thickness, the spacing between tubular arch are both needed to determine after being checked according to the difference of tunnel surrounding grade.
Further, in the step Step2, four sections of precast assemblies of Steel tubular arch-frame point are formed, and Steel tubular arch-frame is using seamless
Steel pipe production, steel pipe thickness 1cm；It is segmented prefabricated steel pipe and is transported to working face progress assembly, first in tunnel before Steel tubular arch-frame is fixed
Splash guard is laid between road preliminary bracing and Steel tubular arch-frame, placing concrete hole, and each section are reserved in each section of Steel tubular arch-frame top
It is connected between Steel tubular arch-frame using arch connecting flange.
As shown in figure 4, steel pipe point four sections of progress outside tunnel are prefabricated, respectively leftwall section 8, RightWall section 9, arch section
10, inverted arch section 11, Steel tubular arch-frame are made of seamless steel pipe, steel pipe thickness 1cm；It is segmented prefabricated steel pipe and is transported to working face progress
Assembly, steel pipe are attached using flange.
Further, Steel tubular arch-frame is fixed by anchor connection device, and concrete has been reserved on the top of each section steel pipe
Mouth is poured, after band Steel tubular arch-frame installation is firm, in steel duct casting concrete, concrete is high-strength greater than C50 using intensity
Concrete.
Further, in the step Step4, four installations of template point, left and right abutment wall is each a piece of, left and right arch each one
Piece, the distance between the width of template and three Pin steel arch-shelfs are wide.
Further, in the step Step5, steel fiber reinforced concrete, which is poured, first pours inverted arch according to sequence from low to high
And abutment wall after-pouring arch part, both sides symmetrically pour simultaneously.
Further, shown anchor connection device 2, anchored end is anchor rod anchored in tunnel surrounding using pack, and anchor pole is long
Degree 3-5m is differed, depending on tunnel surrounding grade.Connecting pin uses casing bit, and casing inner diameter is slightly larger than outside steel pipe
Diameter；Connecting pin is extend out to outside preliminary bracing, is connected between connecting pin and anchored end using multiply high strength steel strand.Steel strand wires pass through
Preliminary bracing and splash guard do reinforcement water-proofing treatment with glue in the position that steel strand wires pass through splash guard.
Further, the Steel tubular arch-frame is made of seamless steel pipe, and steel pipe walls are with a thickness of 1cm.
Further, the Tunnel Second Lining template 4 is fixed with bolts on template anchoring piece 6, current work
Make surface construction completion, template disassembly can be installed to subsequent work face after reaching design strength, reused by concrete.
Further, the construction procedure Step1-Step6 can be interfered between each other in multiple working face synchronous constructions
Very little, it can be achieved that Tunnel Second Lining simultaneously and rapidly construction.
The present invention can be applied according to the arbitrarily prefabricated Steel tubular arch-frame of tunnel Internal periphery shape suitable for variable cross-section Tunnel Second Lining
Work overcomes conventional template trolley the variable cross-section constructing tunnel bad adaptability the shortcomings that；The steel pipe of concrete filled steel tube arch and its
Core concrete can bear external load jointly, have the advantages such as bearing capacity is high, ductility is good, and anti-seismic performance is superior；Concrete filled steel tube
Arch is segmented prefabricated construction, has many advantages, such as that easy for construction, short time limit, template are mounted on arch, and occupancy tunnel space is small, right
The construction interference of other processes is small, and multiple working faces is facilitated continuously to construct.The present invention is suitable for self-stability preferable II, III, IV
Grade country rock location lining construction, especially suitable for tunnel Widening on Curve section, stop in emergency the variable cross-sections tunnels such as band widened section
Construction, have significant technical advantage and preferable economic benefit.
The principle of the present invention is:
Using round steel pipe to the cuff effect of contraction of core concrete, core concrete is made to be in three dimension stress state, thus
Make concrete that there is higher compression strength and compression deformation ability, while steel pipe is enhanced by the supporting role of concrete
The stability of steel pipe walls improves concrete filled steel tube total bearing capacity.Skeleton joint steel fibre is done using concrete filled steel tube arch
Concrete forms secondary liner structure, substitutes traditional armored concrete secondary liner structure, is reaching same structural strength
Simultaneously, moreover it is possible to amount of reinforcement is saved, can adapt to a variety of tunnel sections, additionally has many advantages, such as quick, simple to install of constructing,
It can accelerate speed of application, improve overall economic benefit.
Embodiment 2: as shown in Figs 1-4, a kind of using concrete filled steel tube as the Tunnel Second Lining structure of skeleton and its construction
Method, the present embodiment are same as Example 1, in which:
Spacing between the Steel tubular arch-frame is 1m, and 3 diameter of concrete filled steel tube arch is 30cm.
Steel tubular arch-frame segmentation precast assembly forms, a complete Steel tubular arch-frame be divided into four segments be segmented it is prefabricated,
Steel pipe walls thickness 1.5cm is segmented prefabricated Steel tubular arch-frame using the connection of arch connecting flange 5 and forms an annular arch, every
Closable concrete casting hole is reserved in one section of Steel tubular arch-frame top.
Embodiment 3: as shown in Figs 1-4, a kind of using concrete filled steel tube as the Tunnel Second Lining structure of skeleton and its construction
Method, the present embodiment are same as Example 1, in which:
Spacing between the Steel tubular arch-frame is 1.5m, and 3 diameter of concrete filled steel tube arch is 40cm.
Steel tubular arch-frame segmentation precast assembly forms, a complete Steel tubular arch-frame be divided into four segments be segmented it is prefabricated,
Steel pipe walls thickness 2cm is segmented prefabricated Steel tubular arch-frame using the connection of arch connecting flange 5 and forms an annular arch, each
Closable concrete casting hole is reserved in section Steel tubular arch-frame top.
Specific embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned realities
Example is applied, it within the knowledge of a person skilled in the art, can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (11)
1. using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: use the conduct of concrete filled steel tube arch
Tunnel Second Lining skeleton, fixed form pours steel fiber reinforced concrete on concrete filled steel tube arch, by concrete filled steel tube arch
Tunnel Second Lining is collectively constituted with steel fiber reinforced concrete.
2. according to claim 1 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: specific
Including arch anchor (2), concrete filled steel tube arch (3), Tunnel Second Lining template (4), template anchoring piece (6) and coagulation
Soil pours window (7)；Arch anchor (2) are reserved in the external country rock of Tunnel (1), prefabricated tubular arch will be segmented
Frame has the surface of the abutting Tunnel (1) of spacing to be fixed after working face carries out assembly, inside Steel tubular arch-frame
Casting concrete forms concrete filled steel tube arch (3)；Tunnel Second Lining template (4) passes through pre- on concrete filled steel tube arch (3)
The template anchoring piece (6) stayed is fixed, the concreting window (7) reserved by Tunnel Second Lining template (4) surface
Pour steel fiber reinforced concrete between concrete filled steel tube arch (3), steel fiber reinforced concrete and concrete filled steel tube arch (3) shape together
At the secondary lining in tunnel.
3. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: institute
It states Steel tubular arch-frame and the setting of preliminary bracing surface is close to by anchor connection device, the spacing between Steel tubular arch-frame is 0.8-1.5m,
Concrete filled steel tube arch (3) diameter is 20-40cm, and specific spacing is determined according to tunnel surrounding grade by Structure Calculation.
4. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: institute
It states Steel tubular arch-frame segmentation precast assembly to form, a complete Steel tubular arch-frame is divided into four segments and is segmented prefabricated, steel pipe walls thickness
1-2cm is segmented prefabricated Steel tubular arch-frame using arch connecting flange (5) connection and forms an annular arch, in each section of steel pipe
Closable concrete casting hole is reserved in arch top.
5. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: institute
The size for stating Steel tubular arch-frame is arbitrarily prefabricated according to the variation of headroom in tunnel, to meet the needs of tunnel changes of section.
6. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: institute
The shape for stating Steel tubular arch-frame is round steel pipe or square steel tube.
7. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: institute
It states and has been installed additional template anchoring piece (6) outside Steel tubular arch-frame, Tunnel Second Lining template (4) uses bolt by template anchoring piece (6)
It being fixed on concrete filled steel tube arch (3), Tunnel Second Lining template (4) is divided into four pieces, and each one piece of two sides abutment wall, two sides arch
Each one piece, the width of single form is suitable with the width of three Pin arches.
8. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: every
The top of piece Tunnel Second Lining template (4) is provided with the switchable formula window of two 50cm × 50cm, for pouring for concrete
With vibrate.
9. according to claim 1 to 2 using concrete filled steel tube as the Tunnel Second Lining structure of skeleton, it is characterised in that: to
After concrete strength reaches code requirement, bolt is unscrewed, removes Tunnel Second Lining template (4) from top to bottom, template moves to down
One working face is reused.
10. a kind of using concrete filled steel tube as the construction method of the Tunnel Second Lining structure of skeleton, it is characterised in that:
Prefabricated tubular arch is segmented according to the Internal periphery of the Internal periphery of Tunnel (1) and secondary lining before constructing tunnel
Frame will be segmented prefabricated tubular arch in country rock internal reservation arch anchor (2) in Tunnel (1) construction period
Frame is attached after being transported to working face, then has the Internal periphery of the abutting Tunnel (1) of spacing to connect using pre-buried anchoring
Connection device is fixed, and then injects concrete in steel pipe and forms concrete filled steel tube arch (3), in concrete filled steel tube arch
(3) template anchoring piece (6) are reserved on, after the completion of concrete filled steel tube pours, by template anchoring piece (6) by Tunnel Second Lining
Template (4) is fixed on Steel tubular arch-frame, and steel fiber reinforced concrete, steel fibre are poured between Steel tubular arch-frame by template reserved window
Concrete and concrete filled steel tube arch (3) are formed together Tunnel Second Lining.
11. it is according to claim 10 using concrete filled steel tube as the construction method of the Tunnel Second Lining structure of skeleton,
Be characterized in that: specific step is as follows for the method:
Step1, it constructs arch anchor (2) when applying Tunnel (1) first, the anchor of arch anchor (2)
Fixed end is anchored in tunnel surrounding, and it is external that linkage section stretches out Tunnel (1)；
Step2, according to the Internal periphery of Tunnel (1) and the Internal periphery of Tunnel Second Lining, under being segmented outside tunnel
Expect prefabricated Steel tubular arch-frame；
Step3, will be segmented prefabricated Steel tubular arch-frame be transported to working face carry out it is assembled, in Steel tubular arch-frame and Tunnel (1)
Between first lay splash guard, assembled good tubular arch is erected on Tunnel (1) surface, it is tight by anchor connection device
Patch Tunnel (1) surface is fixed, and high-strength concrete is then poured inside Steel tubular arch-frame, forms concrete filled steel tube
Arch (3)；
Step4, the every certain distance in Steel tubular arch-frame surface reserve template anchoring piece (6) using casing bit, in concrete-filled steel tube arch
Fragment template is fixed on Steel tubular arch-frame after forming intensity by template anchoring piece (6) by frame (3)；
Step5, steel fiber reinforced concrete is poured simultaneously between Steel tubular arch-frame by the concreting window (7) that template surface is reserved
Vibration compacting, steel fiber reinforced concrete and concrete filled steel tube arch (3) are formed together Tunnel Second Lining structure；
After Step6, band Strength of Steel Fiber Reinforced Concrete reach standard, remove Tunnel Second Lining template (4), next section of continuation is secondary
The construction of lining cutting.
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| CN201810674143.9A CN109083658B (en) | 2018-06-27 | 2018-06-27 | Tunnel secondary lining structure with steel pipe concrete as framework and construction method thereof |
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