CN108678775A - A kind of anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab and construction method - Google Patents
A kind of anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab and construction method Download PDFInfo
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- CN108678775A CN108678775A CN201810735528.1A CN201810735528A CN108678775A CN 108678775 A CN108678775 A CN 108678775A CN 201810735528 A CN201810735528 A CN 201810735528A CN 108678775 A CN108678775 A CN 108678775A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 166
- 239000010959 steel Substances 0.000 title claims abstract description 166
- 238000010276 construction Methods 0.000 title claims abstract description 42
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 238000007569 slipcasting Methods 0.000 claims abstract description 14
- 239000004744 fabric Substances 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 238000005728 strengthening Methods 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000012857 repacking Methods 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
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- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 241000283725 Bos Species 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 239000013049 sediment Substances 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- 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
- E21D11/04—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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention relates to a kind of anti-horizontal ovalizing deflection shield tunnel ruggedized constructions of pre-embedded steel slab, including section of jurisdiction, pre-embedded steel slab, junction steel plate, dowel, drag-line, connection channel steel, hydraulic jack, interim slip casting channel；Pre-embedded steel slab is arranged in section of jurisdiction intrados, junction steel plate is arranged between adjacent pre-embedded steel slab, junction steel plate both ends are connected and fixed with pre-embedded steel slab respectively；It equidistantly is vertically welded with dowel on the outside of pre-embedded steel slab, dowel one end is located on pre-embedded steel slab, and the dowel other end is fastened in the main reinforcement of section of jurisdiction；Pre-embedded connecting device is set on pre-embedded steel slab, and pre-embedded connecting device includes built-in screw hole, screw rod and outer connector, and built-in screw hole is set to through pre-embedded steel slab in section of jurisdiction, and screw rod is equipped in built-in screw hole, and screw rod one end is equipped with outer connector.The beneficial effects of the invention are as follows：Tunnel segment structure pre-reinforcement, carrying non-deformability are strong；Level, which is drawn, sets prestressed cable, and limitation section of jurisdiction is displaced outwardly；Top base forms small arch, enhances longitudinal anti-pressure ability.
Description
Technical field
The invention belongs to shield duct piece reinforcement technique field, more particularly to a kind of anti-horizontal ovalizing deflection shield tunnel of pre-embedded steel slab
Road ruggedized construction and construction method, the shield duct piece structure suitable for being vulnerable to longitudinal squeeze and generating horizontal elliptic deformation add
Gu especially to by a wide range of ground preloading or lateral influence of foundation excavation shallow-layer shield tunnel and to stable structure
Property, the higher tunnel segment structure of security requirement.
Background technology
Due to having many advantages, such as that environmentally protective, mechanization degree is high, climate condition does not limit for construction operation, use is prefabricated
The shield tunnel of section of jurisdiction on-site consolidation has become the important feature form of the civilian infrastructures such as current urban track traffic.But with
The further development for urbanization, Tunnel Boring pipeline soil layer surface and around carry out along many Process of Urbanization Construction,
The construction of other tunnel pipelines and the construction at station etc. all can cause structure sediment and deformation effect to subway tunnel structure.Its
In, due to the large-scale preloading in ground or the influence of lateral deep pit digging, generates horizontal elliptic so as to cause tunnel structure and become
Shape destruction is one of them.The deformation that horizontal elliptic occurs for subway tunnel can cause section of jurisdiction crack, percolating water, or even pipe occur
The Integral-structure types such as piece is broken, and lining cutting is peeled off destroy, and cause greatly to threaten to the operation security of subway tunnel, therefore how to add
Gu to resist tunnel the extensive concern that horizontal elliptic deformation has received engineering circles occurs for tunnel structure.
Existing shield tunnel reinforcement technique includes mainly interior steel ring method for strengthening, pastes composite cavity method for strengthening, aramid fiber
Cloth method for strengthening, carbon cloth reinforced method, lateral grouting and reinforcing method etc..Wherein, aramid fabric method for strengthening and carbon cloth reinforced method are made
The reinforcing and reparation of some small deformations are only applicable to for a kind of section of jurisdiction reinforcing means of auxiliary type, it is difficult to resist large deformation structure
It destroys.Lateral grouting and reinforcing method complex process, influence factor is more, and construction is uncertain larger.And interior steel ring method for strengthening and
Although pasting composite cavity method for strengthening using relatively more, constructing operation is complicated, and time-consuming, and there are all in Practical Project
It is mostly inconvenient.
In conclusion existing tunnel reinforcement technology is overall also in the exploratory stage, construction technology is not very ripe, right
Preventing the horizontal elliptic deformation of shield tunnel, the effect is unsatisfactory.In addition, the prior art is often deposited in actual engineer application
It is limited in many conditions, constructing operation is complicated, reinforces the problems such as time-consuming, and consolidation effect is unstable, and there is an urgent need for pass through to improve
Technology is solved.
Invention content
The purpose of the present invention is overcoming deficiency in the prior art, a kind of anti-horizontal ovalizing deflection shield tunnel of pre-embedded steel slab is provided
Road ruggedized construction and construction method.
To realize the above-mentioned technical purpose, present invention employs following technical schemes：This anti-horizontal ovalizing deflection of pre-embedded steel slab
Shield tunnel ruggedized construction, including section of jurisdiction, pre-embedded steel slab, junction steel plate, dowel, drag-line, connection channel steel, hydraulic jack, face
When slip casting channel and wall outside fill solidified earth；Pre-embedded steel slab is arranged in section of jurisdiction intrados, and connection steel is arranged between adjacent pre-embedded steel slab
Plate, junction steel plate both ends are connected and fixed with pre-embedded steel slab respectively；Equidistantly it is vertically welded with dowel, dowel one on the outside of pre-embedded steel slab
End is located on pre-embedded steel slab, and the dowel other end is fastened in the main reinforcement of section of jurisdiction；Pre-embedded connecting device is set on pre-embedded steel slab, in advance
It includes built-in screw hole, screw rod and outer connector to bury attachment device, and built-in screw hole is set to through pre-embedded steel slab in section of jurisdiction, built-in screw hole
Interior to be equipped with screw rod, screw rod one end is equipped with outer connector, and outer connector is exposed at pre-embedded steel slab inner arcuate surface；Outer connector includes bracket
The outer connector of shape and the outer connector of ring tab shape, shield tunnel both sides waist use the outer connector of ring tab shape, are set between the draw ring of both sides
Set prestressed cable, the outer connector of shield tunnel crown and bottom arch position bracket shape arranged symmetrically, outside two contour bracket shapes
Link slot steel is set up between connector to be supported, and hydraulic jack is set on the connection channel steel at top, top section of jurisdiction is pushed up
It rises；The built-in screw hole that ring tab shape coupling abuts up and down is arranged to interim slip casting channel and forms wall for slip casting filling wall outer void
Fill solidified earth outside.
As preferred：The pre-embedded steel slab is close to section of jurisdiction intrados, and is distributed in each piece of section of jurisdiction centre, and and section of jurisdiction
Long side is parallel.
As preferred：The junction steel plate is fixed between adjacent two pieces of sections of jurisdiction, and both ends pass through spiral shell with pre-embedded steel slab respectively
It tethers and connects.
As preferred：The pre-embedded connecting device is distributed on pre-embedded steel slab central axes；Built-in screw hole is by hollow thread set
It constitutes；Screw rod is integral with outer connector.
As preferred：The drag-line both ends are connected on the outer connector of two ring tab shapes of shield tunnel horizontal diameter
And tensioning is formed to the section of jurisdiction of its both sides and is fixed.
As preferred：The connection U-steel frame is located to be connected outside the bracket shape of zero moment of flexure position of tunnel top and bottom
On head.
The construction method of this anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab, includes the following steps：
1) making and processing of pre-embedded steel slab：Radian and length according to section of jurisdiction intrados cut steel plate, vertically
The central axes of steel plain are drawn in short side, are drilled along central axes, and hollow thread set is filled in successively and is fixed on hole
Interior, hollow thread covers one end and pre-embedded steel slab flush, the vertical exposing surface of the other end；Pre-embedded steel slab is bent later
Processing, hollow thread set and the one side of pre-embedded steel slab flush are intrados, and the other side bends to extrados；Wait for pre-embedded steel slab
After making completion of processing, fills in cloth in hollow thread set and blocked, blend compounds band closes both ends hole；
2) welding of bar construction：Reinforced frame has been overlapped according to the size of section of jurisdiction, and the pre-embedded steel slab after processing has been close to
Reinforced frame intrados is arranged, equidistantly welds dowel on the outside of pre-embedded steel slab later, and dowel other end is carried out with section of jurisdiction main reinforcement
It is welded and fixed, pre-embedded steel slab is sufficiently secured on reinforced frame；
3) section of jurisdiction pouring and conserves：Using segment die fixed steel bars skeleton, section of jurisdiction concrete is poured into mould inside later,
Entirety is vibrated molding；Section of jurisdiction is used without form removal after pressing steam-cured about 6~8 hours after pouring concrete；It is demoulded using suspender after form removal, then through turning over
It is transported to spraying cooling area after the overturning of piece machine and carries out spraying cooling, when the section of jurisdiction temperature difference and the pond temperature difference are not more than 20 DEG C, transports to foster
Shield pond is conserved；Section of jurisdiction maintenance, which finishes to go to, stacks field stacking, and shield-tunneling construction onsite application is transported after age to be achieved；
4) it is welded to connect steel plate：After the completion of section of jurisdiction main body is spliced, by the concrete near adjacent section of jurisdiction intrados seam
Wall cuts sub-fraction, exposes pre-embedded steel slab, after carrying out simple cleaning surface, will connect channel steel be fixed on it is embedded pre-buried
On steel plate, surface is concordant with section of jurisdiction intrados, and junction steel plate both ends and pre-embedded steel slab are attached fixation using bolt later,
Epoxy fill gap is utilized later；
5) strengthening construction in tunnel structure：After tunnel is open to traffic, when encountering tunnel structure and being reinforced, utilize
It has been embedded in the components such as the pre-embedded steel slab inside section of jurisdiction and has carried out rapid reinforcement；First, two near horizontal diameter are selected
Built-in screw hole takes out the adhesive tape of sealing and the internal cloth filled in, and to simply being cleaned inside built-in screw hole, by draw ring
The outer connector of shape built in screw rod precession by screw hole, being fixed temporarily；Then connector position selection abuts outside ring tab shape
Two built-in screw holes up and down carry out repacking of getting into the cave, drilled on the basis of screw hole built in script, it is logical to form interim slip casting
Road；Screw hole built in encircleing at 1 moment of flexure point selected around contour two at inverted arch and bottom later, in the same way will be outside bracket shape
Connector is tightened；Link slot steel is set up on connector outside two contour bracket shapes that inverted arch and bottom encircle later to be propped up firmly
Support, outside the ring tab shape at horizontal diameter both ends between connector draw set prestressed cable carry out tensioning fix；Company at crown
Arrange that 1~2 hydraulic jack jacks top section of jurisdiction on access slot steel；Horizontal tensioning and vertical jacking are being carried out to section of jurisdiction
Afterwards, near horizontal diameter both ends section of jurisdiction and seam carry out grouting and reinforcing to prevent section of jurisdiction from having a rebound；
6) disassembly ＆ recycling of ruggedized construction：After waiting for that tunnel structure is stablized, removal level draws the prestressed cable set first,
Remove hydraulic jack, connection channel steel successively later, the components such as the outer connector of bracket shape and the outer connector of ring tab shape are arranged
Recycling；Cloth is filled in again at used built-in screw hole simultaneously and closed orifices block duct to prevent foreign matter from entering.
The beneficial effects of the invention are as follows：
1) tunnel segment structure pre-reinforcement, carrying non-deformability are strong
Steel plate is fixed on section of jurisdiction intrados in advance, and the common stress of the two, the rigidity of structure improves, while overlapped between section of jurisdiction
Junction steel plate strengthens the bonding strength of seam, reduces the changing of the relative positions and deformation between section of jurisdiction.Pre-embedded steel slab, junction steel plate, dowel and
Tunnel segment structure is interconnected and fixed, and forms an entirety, can effectively improve the circumferential bearing capacity of tunnel structure, is resisted horizontal oval
Formula deforms.
2) horizontal draw sets prestressed cable, and limitation section of jurisdiction is displaced outwardly
Tunnel connector outside horizontal diameter both sides setting ring tab shape, the outer connector one end of ring tab shape and intrados are pre-buried
Steel plate is connected with each other, and one end is exposed at section of jurisdiction inner surface, prestressed cable can be connected between the draw ring of both sides, passes through the mutual of transverse direction
The outside deformation in horizontal both sides that tractive force generates to resist tunnel because of longitudinal load.
3) top base forms small arch, enhances longitudinal anti-pressure ability
Be symmetrical arranged the outer connector of bracket shape at 1 moment of flexure point of tunnel top and bottom, the outer connector one end of bracket shape with it is interior
Cambered surface pre-embedded steel slab is connected with each other, and one end is exposed at section of jurisdiction inner surface, and connection is set up between the outer connector of contour yoke of oxen leg
Channel steel forms hard support.Top, the pre-embedded steel slab of bottom and connection channel steel are connected and fixed to form a small arch, strengthen and resist
The ability of longitudinal compression deformation.In addition deployment scenarios that can according to actual needs with tunnel gut line, as one sees fit on connection channel steel
Set up 1-2 hydraulic jack.
4) simple operation, speed of application are fast
The reserved built-in screw hole of section of jurisdiction inner surface, flexibility is strong, precession can install outer connector of different shapes as needed,
For the tensioning of drag-line or the cross-brace of connection channel steel.Without re-starting positioning again when tunnel structure is reinforced
With get into the cave, constructing operation step is simple, and speed of application is fast, can cope with the unexpected deformation of tunnel structure in a short time, practicability
By force.
5) good in economic efficiency
Since steel plate used in this ruggedized construction and attachment device are pre-buried in advance in the casting process of section of jurisdiction, in tunnel
Without being additionally carried out fixation of getting into the cave when reinforcing, artificial destruction will not be caused to tunnel segment structure.Meanwhile the behaviour that constructs in reinforcing process
Make simply, to enter constructing tunnel without heavy mechanical equipment, speed of application is fast, greatly reduces the duration, to reduce construction
Cost.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is pre-embedded connecting device thin portion structural schematic diagram；
Fig. 3 is adjacent section of jurisdiction pre-embedded steel slab attachment structure schematic diagram.
Reference sign：Section of jurisdiction 1；Pre-embedded steel slab 2；Junction steel plate 3；Dowel 4；Built-in screw hole 5；Screw rod 6；Outside bracket shape
Connector 7；Connector 8 outside ring tab shape；Prestressed cable 9；Connect channel steel 10；Hydraulic jack 11；Interim slip casting channel 12；Wall
Fill solidified earth 13 outside.
Specific implementation mode
The present invention is described further with reference to embodiment.The explanation of following embodiments is merely used to help understand this
Invention.It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, also
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection domain of the claims in the present invention
It is interior.
The anti-horizontal ovalizing deflection shield tunnel ruggedized construction of the pre-embedded steel slab, including：Section of jurisdiction 1, pre-embedded steel slab 2, connection
The outer connector 7 of steel plate 3, dowel 4, built-in screw hole 5, screw rod 6, bracket shape, the outer connector 8 of ring tab shape, prestressed cable 9, connection
Channel steel 10, hydraulic jack 11, interim slip casting channel 12, wall fill solidified earth 13 outside.
As shown in Figure 1, pre-embedded steel slab 2 is close to 1 intrados of section of jurisdiction, one group of anchor is arranged every 20cm in 2 outside of pre-embedded steel slab
Muscle 4,4 other end of dowel are welded with 1 main reinforcement of section of jurisdiction so that pre-embedded steel slab 2 is fully close to be fixed on 1 intrados of section of jurisdiction, is formed
One stress entirety；On 2 central axes of pre-embedded steel slab a built-in screw hole 5 is laid every 20cm；Tunnel horizontal diameter both ends are each
Take a hithermost built-in screw hole 5 to carry out the fixation of ring tab shape outer connector 8 and screw rod 6, and outside ring tab shape connector 8 it
Between draw set prestressed cable 9；Connector 7 outside bracket shape, the company of being used to support are installed in both sides at zero moment of flexure of tunnel top and bottom
Access slot steel 10 forms two small domes at the top and bottom of tunnel structure, is conducive to improve the longitudinal load-bearing ability in tunnel；
1-2 hydraulic jack 11 can be laid according to the distribution situation of tunnel internal pipeline on the connection channel steel 10 at crown position, it is right
Section of jurisdiction 1 is jacked；Two built-in screw holes 5 that about 8 ring tab shape coupling abuts repacking of getting into the cave is formed into interim slip casting channel
12, it is formed outside wall for slip casting filling wall outer void and fills solidified earth 13, prevent the rebound outward again of section of jurisdiction 1.
As shown in Fig. 2, pre-embedded connecting device is arranged on pre-embedded steel slab 2, pre-embedded connecting device by built-in screw hole 5, screw rod 6,
Connector 8 collectively forms outside the outer connector 7 of bracket shape or ring tab shape.Wherein built-in screw hole 5 is 20mm, length by an interior diameter
For 100mm hollow thread cover constitute, before section of jurisdiction 1 pours it is pre-buried wherein；Screw rod 6 and outer connector are the integrated design, outside
Connector is divided into connector 8 outside the outer connector 7 of bracket shape and ring tab shape.Outer connector can be fixed on section of jurisdiction by screw thread rotation
At 1 corresponding built-in screw hole 5, and Fast Installation and dismounting can be carried out at any time.
As shown in figure 3, being close to 1 intrados of section of jurisdiction is provided with pre-embedded steel slab 2, adjacent two pieces of pre-embedded steel slabs 2 pass through company
It connects steel plate 3 to carry out being bolted fixation, strengthens the bonding strength of segment joint, reduce the changing of the relative positions and deformation between section of jurisdiction 1.
The wide 600mm of material selection of pre-embedded steel slab 2, the curved plate of thick 20mm.The material selection of junction steel plate 3 is wide
200mm, thick 20mm curved plates.The reinforcing bar of 4 material selection diameter 8mm of dowel.Connect 10 material selection model 20a's of channel steel
Channel steel.
The anti-horizontal ovalizing deflection shield tunnel ruggedized construction of the pre-embedded steel slab, includes the following steps：
1) making and processing of pre-embedded steel slab 2：Radian and length according to 1 intrados of section of jurisdiction cut steel plate, profit
The central axes for drawing steel plain perpendicular to short side with marking pen utilize drill hole of drilling machine along central axes every 20cm, and successively
The hollow thread set that interior diameter is 20mm is filled in and is fixed in hole, it is flat with 2 surface of pre-embedded steel slab that hollow thread covers one end
Together, the vertical exposing surface of the other end.Bending machining carried out to pre-embedded steel slab 2 using bending machinery later, hollow thread set with it is pre-
The one side for burying 2 flush of steel plate is intrados, and the other side bends to extrados.After pre-embedded steel slab 2 makes completion of processing,
Cloth is filled in hollow thread set to be blocked, blend compounds band closes both ends hole.
2) welding of bar construction：Reinforced frame is overlapped according to the size of section of jurisdiction 1, and the pre-embedded steel slab 2 after processing is tight
Reinforced frame intrados arrangement is pasted, welds the dowel 4 of one group of a diameter of 8mm, dowel 4 every 20cm in 2 outside of pre-embedded steel slab later
Other end is welded and fixed with 1 main reinforcement of section of jurisdiction, and pre-embedded steel slab 2 is sufficiently secured on reinforced frame.
3) section of jurisdiction 1 pouring and conserves：Using 1 mold fixed steel bars skeleton of section of jurisdiction, section of jurisdiction concrete is poured into mold later
Portion is integrally vibrated molding using the pneumatic vibrator of adhesion type.Pour after concrete section of jurisdiction 1 using without steam-cured about 6~8 hours of pressure (containing heating,
Temperature fall time) collapsible die afterwards.It is demoulded using special hanger (vacuum cup) after form removal, then is transported to spray drop after turning machine is overturn
Warm area carries out spraying cooling, when the section of jurisdiction temperature difference and the pond temperature difference are not more than 20 DEG C, transport to curing pool and is supported by code requirement
Shield.Section of jurisdiction maintenance, which finishes to go to, stacks field stacking, and shield-tunneling construction onsite application is transported after 28 day age to be achieved.
4) it is welded to connect steel plate 3：After the completion of 1 main body of section of jurisdiction is spliced, by the coagulation near 1 intrados seam of adjacent section of jurisdiction
Tu Bi cuts sub-fraction, exposes pre-embedded steel slab 2, after carrying out simple cleaning surface, connection channel steel 3 is fixed on embedded
On pre-embedded steel slab 2, surface is concordant with 1 intrados of section of jurisdiction, is later carried out at 3 both ends of junction steel plate with pre-embedded steel slab 2 using bolt
It is connected and fixed, utilizes epoxy fill gap later.
5) strengthening construction in tunnel structure：It, can when such as encountering tunnel structure and being reinforced after tunnel is open to traffic
Rapid reinforcement is carried out using the equal components of the pre-embedded steel slab 2 being embedded in inside section of jurisdiction 1.First, selection is near horizontal diameter
One built-in screw hole 5 at both ends takes out the adhesive tape of sealing and the internal cloth filled in, and carries out letter to 5 inside of built-in screw hole
Single cleaning, it is ensured that after internal no-sundries that connector outside ring tab shape 8 is temporarily solid by screw hole 5, being carried out built in 6 precession of screw rod
It is fixed.Then the two built-in screw holes 5 up and down abutted are selected to carry out repacking of getting into the cave at connector 8 outside ring tab shape, built in script
It is drilled on the basis of screw hole 5, forms interim slip casting channel 12.It is selected around contour to encircle 1 moment of flexure point in inverted arch and bottom later
Two at built in screw hole 5, connector 7 outside bracket shape is tightened in the same way.Two encircleed later in inverted arch and bottom
Erection link slot steel 10 is supported firmly on the outer connector 7 of contour bracket shape, the connector 8 outside the ring tab shape at horizontal diameter both ends
Between draw set prestressed cable 9 carry out tensioning fix.It, can be at crown if necessary and in the case of overhead line distribution permission
Connection channel steel 10 on arrangement 1-2 hydraulic jack 11 top section of jurisdiction 1 is jacked.Horizontal tensioning is being carried out to section of jurisdiction 1
After vertical jacking, need near horizontal diameter both ends section of jurisdiction 1 and seam carry out grouting and reinforcing, prevent section of jurisdiction 1 from occurring instead
Bullet.
6) disassembly ＆ recycling of ruggedized construction：After waiting for that tunnel structure is stablized, removal level draws the prestressed cable set first
9, remove hydraulic jack 11, connection channel steel 10, the components such as the outer connector 7 of bracket shape and the outer connector 8 of ring tab shape successively later
It carries out timely arranging recycling.Meanwhile filling in cloth and closed orifices again at used built-in screw hole 5, prevent foreign matter
Into duct is blocked, facilitates next tunnel to fix and use.After all material and personnel are withdrawn, you can recovery is open to traffic.
Claims (7)
1. a kind of anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab, it is characterised in that：Including section of jurisdiction (1), pre-buried steel
Plate (2), junction steel plate (3), dowel (4), drag-line (9), connection channel steel (10), hydraulic jack (11), interim slip casting channel
(12) and outside wall solidified earth (13) is filled；Pre-embedded steel slab (2) is arranged in section of jurisdiction (1) intrados, is arranged between adjacent pre-embedded steel slab (2)
Junction steel plate (3), junction steel plate (3) both ends are connected and fixed with pre-embedded steel slab (2) respectively；It equidistantly hangs down on the outside of pre-embedded steel slab (2)
It directly is welded with dowel (4), dowel (4) one end is located on pre-embedded steel slab (2), and the other end is fastened in section of jurisdiction (1) main reinforcement；In advance
It buries and pre-embedded connecting device is set on steel plate (2), pre-embedded connecting device includes built-in screw hole (5), screw rod (6) and outer connector, interior
It sets screw hole (5) to be set in section of jurisdiction (1) through pre-embedded steel slab (2), screw rod (6) is equipped in built-in screw hole (5), screw rod (6) one end is set
There are outer connector, outer connector to be exposed at pre-embedded steel slab (2) inner arcuate surface；Outer connector includes the outer connector (7) of bracket shape and draws
Cyclic annular outer connector (8), shield tunnel both sides waist are arranged the outer connector (8) of ring tab shape, prestressing force are arranged between the draw ring of both sides
Drag-line (9), the outer connector (7) of shield tunnel crown and bottom arch position bracket shape arranged symmetrically, two contour bracket shapes connect outside
Link slot steel (10) is set up between connector (7) to be supported, and it is right that hydraulic jack (11) is set on the connection channel steel (10) at top
Top section of jurisdiction (1) is jacked；The built-in screw hole (5) that ring tab shape coupling (8) abuts up and down is arranged to interim slip casting channel
(12) it is used to fill solidified earth (13) outside slip casting filling wall outer void formation wall.
2. the anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab according to claim 1, it is characterised in that：It is described
Pre-embedded steel slab (2) is close to section of jurisdiction (1) intrados, and is distributed in each piece of section of jurisdiction (1) centre, and equal with section of jurisdiction (1) long side
Row.
3. the anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab according to claim 1, it is characterised in that：It is described
Junction steel plate (3) is fixed between adjacent two pieces of sections of jurisdiction (1), and both ends are bolted with pre-embedded steel slab (2) respectively.
4. the anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab according to claim 1, it is characterised in that：It is described
Pre-embedded connecting device is distributed on pre-embedded steel slab (2) central axes；Built-in screw hole (5) is made of hollow thread set；Screw rod (6) with it is outer
Connector is integral.
5. the anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab according to claim 1, it is characterised in that：It is described
Drag-line (9) both ends are connected on the outer connector (8) of two ring tab shapes of shield tunnel horizontal diameter and to the pipe of its both sides
Piece (1) forms tensioning and fixes.
6. the anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab according to claim 1, it is characterised in that：It is described
Connection channel steel (10) is erected on the outer connector (7) of bracket shape of zero moment of flexure position of tunnel top and bottom.
7. the construction method of the anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab according to claim 1, special
Sign is, includes the following steps：
1) making and processing of pre-embedded steel slab (2)：Radian and length according to section of jurisdiction (1) intrados cut steel plate, hang down
The central axes that steel plain is directly drawn in short side, drill along central axes, and successively fill in hollow thread set and be fixed on hole
In hole, hollow thread covers one end and pre-embedded steel slab (2) flush, the vertical exposing surface of the other end；Later to pre-embedded steel slab (2)
Bending machining is carried out, hollow thread set and the one side of pre-embedded steel slab (2) flush are intrados, and the other side bends to outer arc
Face；After pre-embedded steel slab (2) makes completion of processing, fills in cloth in hollow thread set and blocked, blend compounds band closing two
Hold hole；
2) welding of bar construction：Reinforced frame is overlapped according to the size of section of jurisdiction (1), and the pre-embedded steel slab (2) after processing is tight
Reinforced frame intrados arrangement is pasted, equidistantly welds dowel (4), dowel (4) other end and pipe on the outside of pre-embedded steel slab (2) later
Piece (1) main reinforcement is welded and fixed, and pre-embedded steel slab (2) is sufficiently secured on reinforced frame；
3) section of jurisdiction (1) pouring and conserving：Using section of jurisdiction (1) mold fixed steel bars skeleton, section of jurisdiction concrete is poured into mold later
Portion, molding of integrally vibrating；Section of jurisdiction (1) is using without form removal after pressing steam-cured about 6~8 hours after pouring concrete；It is demoulded using suspender after form removal,
Spraying cooling area is transported to after overturning again and carries out spraying cooling, when the section of jurisdiction temperature difference and the pond temperature difference are not more than 20 DEG C, is transported to foster
Shield pond is conserved；Section of jurisdiction maintenance, which finishes to go to, stacks field stacking, and shield-tunneling construction onsite application is transported after age to be achieved；
4) it is welded to connect steel plate (3)：It, will be mixed near adjacent section of jurisdiction (1) intrados seam after the completion of section of jurisdiction (1) main body is spliced
Solidifying Tu Bi cuts sub-fraction, exposes pre-embedded steel slab (2), and after carrying out simple cleaning surface, connection channel steel (3) is fixed on
On embedded pre-embedded steel slab (2), surface is concordant with section of jurisdiction (1) intrados, utilize later bolt by junction steel plate (3) both ends with it is pre-
It buries steel plate (2) and is attached fixation, utilize epoxy fill gap later；
5) strengthening construction in tunnel structure：After tunnel is open to traffic, when encountering tunnel structure and being reinforced, using
It is embedded in the components such as the internal pre-embedded steel slab (2) in section of jurisdiction (1) and carries out rapid reinforcement；First, selection is near the two of horizontal diameter
A built-in screw hole (5), the adhesive tape of sealing and the internal cloth filled in are taken out, and simple clear to being carried out inside built-in screw hole (5)
It washes, by connector outside ring tab shape (8) by screw hole (5) built in screw rod (6) precession, being fixed temporarily；Then in ring tab shape
The two built-in screw holes (5) up and down abutted are selected to carry out repacking of getting into the cave at outer connector (8), the base in screw hole built in script (5)
It is drilled on plinth, forms interim slip casting channel (12)；Encircle at 1 moment of flexure point selected around contour two at inverted arch and bottom later
Connector (7) outside bracket shape is tightened by built-in screw hole (5) in the same way；Two etc. encircleed later in inverted arch and bottom
Link slot steel (10) is set up on the outer connector (7) of high bracket shape to be supported firmly, is connected outside the ring tab shape at horizontal diameter both ends
Drawing sets prestressed cable (9) progress tensioning and fixes between head (8)；1~2 hydraulic pressure is arranged on connection channel steel (10) at crown
Jack (11) jacks top section of jurisdiction (1)；After carrying out horizontal tensioning and vertical jacking to section of jurisdiction (1), to horizontal straight
Section of jurisdiction (1) and seam near diameter both ends carry out grouting and reinforcing to prevent section of jurisdiction (1) from having a rebound；
6) disassembly ＆ recycling of ruggedized construction：After waiting for that tunnel structure is stablized, removal level draws the prestressed cable (9) set first,
Remove hydraulic jack (11), connection channel steel (10), the outer connector (7) of bracket shape and the outer connector (8) of ring tab shape successively later
Equal components carry out arrangement recycling；Cloth is filled in again at used built-in screw hole (5) simultaneously and closed orifices are different to prevent
Object, which enters, blocks duct.
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| CN201810735528.1A CN108678775B (en) | 2018-07-06 | 2018-07-06 | Transverse oval deformation resistant shield tunnel reinforcing structure of embedded steel plate and construction method |
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| CN109723467A (en) * | 2019-01-11 | 2019-05-07 | 北京交通大学 | A kind of bored tunnel lining reinforcement device and reinforcement means |
| CN109882195A (en) * | 2019-03-27 | 2019-06-14 | 浙江大学城市学院 | A kind of assembled big cross section rectangle pipe jacking tube coupling and construction method |
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| CN112627849A (en) * | 2020-12-14 | 2021-04-09 | 中交第二公路勘察设计研究院有限公司 | Longitudinal asymmetric external prestress construction method for shield tunnel segment with small curvature radius |
| CN113958339A (en) * | 2021-09-27 | 2022-01-21 | 哈尔滨国统管道有限公司 | Back steel plate segment forming process |
| CN113622966A (en) * | 2021-10-13 | 2021-11-09 | 江苏隧锦五金制造有限公司 | Tunnel is with pre-buried sideboard concatenation seam pouring device |
| CN115573309A (en) * | 2022-09-21 | 2023-01-06 | 广东省水利电力勘测设计研究院有限公司 | Protection framework for improving safety performance of diversion tunnel structure |
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