CN109372558A - A kind of construction method of subway large section tunnel tunneling support replacement and main structure - Google Patents
A kind of construction method of subway large section tunnel tunneling support replacement and main structure Download PDFInfo
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- CN109372558A CN109372558A CN201811613136.4A CN201811613136A CN109372558A CN 109372558 A CN109372558 A CN 109372558A CN 201811613136 A CN201811613136 A CN 201811613136A CN 109372558 A CN109372558 A CN 109372558A
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- waterproof layer
- support replacement
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- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
-
- 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
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
Abstract
The construction method of a kind of subway large section tunnel tunneling support replacement and main structure, it is related to a kind of construction method.The present invention is in order to which there are security risks for the method for dismounting that solves the problems, such as the existing interim median septum of big cross section multiple tracks.After the completion of branch at the beginning of excavation of the invention and back-grouting, casting concrete bed course abolishes layer 5 median septum concrete and reinforced mesh, is laid with waterproof layer, then carries out reinforcing bar and template and casting concrete, applies floor structure；It is horizontally-supported to remove the 4th layer of two sides, is laid with side wall waterproof layer, applies sidewall structure；It is horizontally-supported to remove third layer two sides, is laid with side wall waterproof layer, applies sidewall structure and lower middle plate；It is horizontally-supported to remove second layer two sides, is laid with side wall waterproof layer, applies sidewall structure and upper middle plate；It is horizontally-supported to remove first layer two sides, arch vertical supporting support replacement is laid with side wall and arch waterproof layer, applies side wall and arch structure；Remove all vertical supportings.The present invention is in subway and Tunnel Engineering.
Description
Technical field
The present invention relates to a kind of construction methods, and in particular to a kind of subway large section tunnel tunneling support replacement and main structure
Construction method, belong to subway and Tunnel Engineering correlative technology field.
Background technique
During metro construction, inevitably encounters large section tunnel and (excavate span 10m to 15m, super large is disconnected
Face refers to: excavated section area is greater than 100 ㎡), as branch-cut bridge, turn back line, field section enter and leave line, parking line, interconnection and air duct and
Station etc..When the conditions permits such as traffic above-ground and building, large section tunnel, such as Guangzhou Underground are built frequently with cut and cover method
No. 3 line Chinese small stream stations-city section Qiao Zhan overall length 6km or so mainly uses shield construction, but wherein 1.3km uses cut and cover method,
Parking line including 260m long, while being also provided with single branch-cut bridge, section of track well, service channel and pump house etc..But due to ground ironworker
The case where journey is mainly built in urban district, and surface condition does not allow open cut is more, can only use shallow mining method, such as Beijing Rail Transit
Changping line Changping Dongguan station running tunnel large cross-section tunnel construction, using CRD engineering method (yellow good ice CRD method big cross section bored tunnel
Median septum waterproofing node processing method, municipal technology: S1 phase in 2016).
Due to urban environment complicated condition, as building is intensive, underground utilities are numerous, soft soil layer and rich groundwater
Two side-wall pilot tunnel is mostly used to be layered tunneling Deng, subway large section tunnel, as Harbin Line 2 Metro provincial government station air duct is dark
Engineering is dug, 230 square metres of excavated section or so (11 meters of span, 20 meters high), totally 15 parts carry out excavation supportings for 5 layers of layering.With
Two side-wall pilot tunnel is layered tunneling large section soft soil tunnel, after the completion of excavation supporting, construction waterproof layer and main structure (two
Secondary lining cutting) being related to support replacement safety problem, (Liu's winter, subway tunnel branch-cut bridge section tear support and support replacement key construction technology, 2017 China open
Construction Annual Conference collection of thesis (profession volume)), if the scheme and improper measures taken, it will lead to preliminary bracing deformation,
So as to cause accidents such as landslides, construction safety is seriously threatened.
There is a kind of lining of large cross-section tunnel two construction support replacement technique (invention about the license of support replacement at present
201210586406.3), which is directed to CRD method, uses I-steel (to be supported on to be embedded in and face upward as diagonal brace using in perpendicular support side
Encircle on the steel plate in fill concrete) support replacement is carried out, the diagonal brace influence side wall concrete of this method applies operating space.And it is special
It is also for CRD method, directly that a kind of large cross-section tunnel of benefit, which changes support and two linings construction method (application number 201710588598.4),
Lower layer's median septum construction inverted arch is cut off, interim inverted arch construction side wall is cut off again, finally cuts off upper layer median septum construction arch, is not adopted
With support replacement measure, there are security risks.A kind of method for dismounting (application number of the interim median septum of big cross section multiple tracks of patent
201810026398.4) using in such a way that 1 Pin removes 2 Pin, one section of bottom is first sliced off, waterproof layer is laid, then puts rubber
Screw thread steel leg is finally welded with I-steel and fagging respectively, re-establishes and play a supportive role by rubber cushion plate and fagging, the patent
In the presence of slice off support after be laid with waterproof layer when hanging security risk.
In conclusion the two side-wall pilot tunnel used in the method for dismounting of the existing interim median septum of big cross section multiple tracks, 5 layers altogether
Support is removed in the subway large section tunnel waterproof layer of 15 step tunnelings and two lining constructions, due to being laid with waterproof after slicing off support
, there is security risk in layer.
Summary of the invention
The purpose of the present invention is to solve the method for dismounting of the existing interim median septum of big cross section multiple tracks due to slicing off support
After be laid with waterproof layer, there are problems that security risk.And then provide a kind of subway large section tunnel tunneling support replacement and main body knot
The construction method of structure.
The technical scheme is that the construction method of a kind of subway large section tunnel tunneling support replacement and main structure,
Subway large section tunnel tunneling main structure is used constructs along the practice, implementation process are as follows:
Step 1: after the completion of excavating just branch and back-grouting, casting concrete bed course；
Using the excavation supporting method of layering branch, stage excavation supporting from top to bottom carries out just branch back-grouting, and pours
Concrete cushion is built, foundation pit supporting construction is formed；
Step 2: concrete and reinforced mesh are abolished, removes part I-steel for the first time；
Foundation pit supporting construction is followed successively by layer 5, the 4th layer, third layer, the second layer and first layer from the bottom to top；
The concrete and reinforced mesh in first layer median septum are abolished, successively exposes be equally spaced multiple works from left to right
Word steel；Multiple I-steel are followed successively by the first I-steel, the second I-steel, third I-steel, the 4th I-steel, the 5th from left to right
I-steel, the 6th I-steel, the 7th I-steel, the 8th I-steel, the 9th I-steel, the tenth I-steel, the 11st I-steel,
12 I-steel, the 13rd I-steel, the 14th I-steel, the 15th I-steel and the 16th I-steel；First I-steel is extremely
8th I-steel is first group of vertical supporting, and the 9th I-steel to the 16th I-steel is second group of vertical supporting；
The middle part of first group of vertical supporting and second group of vertical supporting passes through horizontally disposed Two bors d's oeuveres channel steel connection, to perpendicular
2 are removed every 4 to the I-steel of support bottom, i.e. the 5th I-steel of dismounting, the 6th I-steel, the 11st I-steel and the
12 I-steel；
Step 3: waterproof layer and support replacement are laid with；
In the lower end of the 5th I-steel of dismounting and the 6th I-steel and the 11st I-steel and the 12nd I-steel point
Not Pu She width be 1.5m the first waterproof layer, the then Two bors d's oeuveres channel steel between the 5th I-steel of dismounting and the 6th I-steel
Two bors d's oeuveres channel steel middle position between middle position and the 11st I-steel and the 12nd I-steel uses the first support replacement I-shaped
Bracing members；
Step 4: second dismounting part I-steel, and it is laid with waterproof layer and support replacement；
The top of the 6th I-steel to the 11st I-steel is connected by a Two bors d's oeuveres channel steel again, removes the 8th I-steel
With the vertical supporting bottom of the 9th I-steel, and being laid with width in the bottom for removing the 8th I-steel and the 9th I-steel is 2.0m
The second waterproof layer, the Two bors d's oeuveres channel steel between the 8th I-steel and the 9th I-steel passes through the second support replacement I-shaped in the vertical direction
Bracing members；
Step 5: third time removes part I-steel, and is laid with waterproof layer and support replacement；
1 in 4 I-steel of midfeather, i.e. the tenth I-steel, in the lower end of the tenth I-steel are successively removed again
The overlap joint between the first waterproof layer and the second waterproof layer is done, the waterproof layer lap of splice is 0.25m；
It is supported again by the first support replacement I-steel in this root position, i.e., the first support replacement I-steel is supported under the tenth I-steel
On the Two bors d's oeuveres channel steel of side；
Remaining 1 I-steel is changed according to the method, i.e. it is anti-to do first below the 7th I-steel for the 7th I-steel
Overlap joint between water layer and the second waterproof layer, the waterproof layer lap of splice are 0.25m；
So far, the waterproof layer for completing longitudinal 4.5m is laid with, and continues to be carried forward according to the method for step 2 to step 5
Next working cycles, then complete the waterproof layer laying of a 4.5m；
Step 6: being laid with the waterproof layer completed and carry out base plate steel bar binding and template assemblies, and casting concrete,
Complete applying for tunnel floor structure；
Step 7: dismounting second layer two sides are horizontally-supported, are laid with side wall waterproof layer, and it is horizontally-supported with lower part to carry out third layer
Divide the binding of side wall reinforcing bar and template assemblies and bracket, and casting concrete, completes applying for the part sidewall structure；
Step 8: dismounting third layer two sides are horizontally-supported, are laid with side wall waterproof layer, and the 4th layer of progress is horizontally-supported with lower part
Divide side wall and the binding of lower middle plate reinforcing bar and template assemblies and bracket, and casting concrete, completes the part side wall and lower middle layer
Hardened structure applies；
Step 9: the 4th layer of two sides of dismounting are horizontally-supported, are laid with side wall waterproof layer, and it is horizontally-supported with lower part to carry out layer 5
Divide side wall and the binding of upper middle plate reinforcing bar and template assemblies and bracket, and casting concrete, completes the part side wall and upper middle layer
Hardened structure applies；
Step 10: being laid with the arch waterproof layer in layer 5 within the scope of the area III, and width is still the alternate paving of 1.5m and 2m
If two sides is needed to reserve enough length, until with waterproof layer of the layer 5 through laying is overlapped at the arch springing of two sides；
Step 11: arranging the 3rd support replacement I-steel using one between the vertical median septums of two rows in layer 5 come support replacement,
Weld the second steel plate, and second steel plate at the top of third support replacement I-steel and arch waterproof layer in the both ends of third support replacement I-steel
Between use rubber slab to connect with longitudinal length for the lower flange crab bolt of the 4th support replacement I-steel of 4.5m, third support replacement I-steel
Second steel plate of bottom is connected by screw bolts with the horizontally-supported I-steel flange plate of first layer；
Step 12: vertical supporting and the layer 5 two sides for removing the two sides on the horizontally-supported top of layer 5 are horizontally-supported,
It removes from back to front, removes two Pin every time, be then laid with the waterproof layer in the area I and the area II, width is still the alternate paving of 1.5m and 2m
And if overlap 0.25m, until so far completing the arch of a longitudinal direction 4.5m long with the waterproof layer of two sides arch springing overlap joint 0.25m
Portion's waterproof layer is laid with work；
Step 13: repeating step 10 to step 12, then carries out an arch support replacement and the work of waterproof layer lay cycle,
Arch waterproof layer until completing longitudinal direction 9m long is laid with work；
Step 14: setting up bracket, assembling reinforcement, installation template and casting concrete, completes applying for arch structure；
Step 15: the institute within the scope of the 9m is removed after the concrete of arch structure reaches 75% or more of design strength
There is remaining support, the construction into next 9m recycles, until whole constructing tunnel is completed.
The present invention has the effect that compared with prior art
1, the present invention removes 2 vertical supporting support replacement methods due to taking every 4, and two rows of vertical supportings are taken
First left and then right mode, it is ensured that the globality of (period includes to be laid with waterproof layer) preliminary bracing stress and space during support replacement
Property (dismounting is local two, and this two power is shared upper to each two of front and back), controlled deformation and safety.
Thus it solves and divides the subway large section tunnel waterproof layer of tunneling and main structure to apply using two side-wall pilot tunnel layering multi-section
Safety problem caused by supporting is removed in work.
2, the present invention first removes two supports, then (ECB is a kind of ethylene copolymer-modified drip to circumferential laying ECB splash guard
Green resin is blended with asphaltic resin and is produced through high pressure method by ethylene, acetate ethylene copolymer, is the thermoplasticity of high molecular weight
Atactic polymer), width is the progress of the interval 1.5m and 2.0m, lap width 0.25m.Ensure the entirety of splash guard circumferential direction
Property and good overlap joint effect, to improve waterproof effect.
3, vertical supporting of the present invention retains always, and until domain tunnel, main structure applies completion, and concrete reaches design
75% or more of intensity is just removed, at the same it is horizontally-supported remove layer by layer from bottom to top, do not remove support for main body knot
Structure falsework plays certain supporting role, reduces bracket scaffolding height, to improve the pouring quality of concrete.
4, tunnel layer 5 vertical supporting two rows of the invention increase arch stay in place form rack by intermediate row replacement
Assembling space, to improve construction efficiency.
Detailed description of the invention
Fig. 1 is the schematic diagram of tunnel support structure.
Fig. 2 is that band needs to be abolished the structural schematic diagram of concrete and reinforced mesh 8 in tunnel support structure 1.
Fig. 3 is the dismounting of the vertical median septum 7 of two rows in layer 52, support changing structure for use schematic diagram.
Fig. 4 is dismounting and the support replacement process schematic of large section tunnel tunneling support replacement and main structure of the present invention.
Fig. 5 is the structural schematic diagram after Two bors d's oeuveres channel steel C is connect with the first steel plate 27.
Fig. 6 is the schematic diagram of 9 connecting node of Two bors d's oeuveres channel steel C and the first I-steel.
Fig. 7 be I-steel connecting node on the first support replacement I-steel H and the second support replacement I-steel I and Two bors d's oeuveres channel steel C and
The schematic diagram of waterproof layer.
Wherein, × indicate to cut off.
Specific embodiment
Specific embodiment 1: illustrating present embodiment in conjunction with Fig. 1 to Fig. 7, a kind of subway super large of present embodiment is disconnected
The construction method of face tunnel excavation support replacement and main structure, subway large section tunnel tunneling main structure is used to be applied along the practice
Work, implementation process are as follows:
Step 1: after the completion of excavating just branch and back-grouting, casting concrete bed course；
Using the excavation supporting method of layering branch, stage excavation supporting from top to bottom carries out just branch back-grouting, and pours
Concrete cushion is built, foundation pit supporting construction 1 is formed；
Step 2: concrete and reinforced mesh 8 are abolished, removes part I-steel for the first time；
Foundation pit supporting construction 1 is followed successively by layer 52, the 4th layer 3, third layer 4, the second layer 5 and first layer 6 from the bottom to top；
Abolish the concrete and reinforced mesh 8 in first layer median septum 7, from left to right successively expose be equally spaced it is multiple
I-steel；Multiple I-steel are followed successively by the first I-steel 9, the second I-steel 10, third I-steel 11, the 4th I-shaped from left to right
Steel 12, the 5th I-steel 13, the 6th I-steel 14, the 7th I-steel 15, the 8th I-steel 16, the 9th I-steel 17, the tenth work
Word steel 18, the 11st I-steel 19, the 12nd I-steel 20, the 13rd I-steel 21, the 14th I-steel 22, the 15th I-shaped
Steel 23 and the 16th I-steel 24；First I-steel, 9 to the 8th I-steel 16 be first group of vertical supporting, the 9th I-steel 17 to
16th I-steel 24 is second group of vertical supporting；
The middle part of first group of vertical supporting and second group of vertical supporting passes through horizontally disposed Two bors d's oeuveres channel steel C connection, right
The I-steel of vertical supporting bottom removes 2 every 4, i.e. dismounting the 5th I-steel 13, the 6th I-steel 14, the 11st I-shaped
Steel 19 and the 12nd I-steel 20；
Step 3: waterproof layer and support replacement are laid with；
In the 5th I-steel 13 of dismounting and the 6th I-steel 14 and the 11st I-steel 19 and the 12nd I-steel 20
Lower end be laid with respectively width be 1.5m the first waterproof layer 25, then in the 5th I-steel 13 of dismounting and the 6th I-steel 14
Between the Two bors d's oeuveres middle position channel steel C and the 11st I-steel 19 and the 12nd I-steel 20 between Two bors d's oeuveres channel steel C among
Position is supported using the first support replacement I-steel H；
Step 4: second dismounting part I-steel, and it is laid with waterproof layer and support replacement；
The top of 14 to the 11st I-steel 19 of the 6th I-steel is connected by a Two bors d's oeuveres channel steel C again, removes the 8th
The vertical supporting bottom of I-steel 16 and the 9th I-steel 17, and in the bottom for removing the 8th I-steel 16 and the 9th I-steel 17
It is laid with the second waterproof layer 26 that width is 2.0m, the Two bors d's oeuveres channel steel C between the 8th I-steel 16 and the 9th I-steel 17 is vertical
Side is supported upwardly through the second support replacement I-steel I；
Step 5: third time removes part I-steel, and is laid with waterproof layer and support replacement；
1 in 4 I-steel of midfeather, i.e. the tenth I-steel 18, in the tenth I-steel 18 are successively removed again
The overlap joint between the first waterproof layer 25 and the second waterproof layer 26 is done in lower end, and the waterproof layer lap of splice is 0.25m；
It is supported again by the first support replacement I-steel H in this root position, i.e., the first support replacement I-steel H is supported on the tenth I-steel
On the Two bors d's oeuveres channel steel C of 18 lower sections；
Remaining 1 I-steel is changed according to the method, i.e. the 7th I-steel 15 does in the lower section of the 7th I-steel 15
Overlap joint between one waterproof layer 25 and the second waterproof layer 26, the waterproof layer lap of splice are 0.25m；
So far, the waterproof layer for completing longitudinal 4.5m is laid with, and continues to be carried forward according to the method for step 2 to step 5
Next working cycles, then complete the waterproof layer laying of a 4.5m；
Step 6: being laid with the waterproof layer completed and carry out base plate steel bar binding and template assemblies, and casting concrete,
Complete applying for tunnel floor structure；
Step 7: dismounting 5 two sides of the second layer are horizontally-supported, are laid with side wall waterproof layer, and it is horizontally-supported following to carry out third layer 4
The binding of part side wall reinforcing bar and template assemblies and bracket, and casting concrete, complete applying for the part sidewall structure；
Step 8: dismounting 4 two sides of third layer are horizontally-supported, are laid with side wall waterproof layer, and the 4th layer 3 of progress horizontally-supported following
Part side wall and the binding of lower middle plate reinforcing bar and template assemblies and bracket, and casting concrete, complete the part side wall and it is lower in
Veneer structure applies；
Step 9: the 4th layer of 3 two sides of dismounting are horizontally-supported, are laid with side wall waterproof layer, and it is horizontally-supported following to carry out layer 52
Part side wall and the binding of upper middle plate reinforcing bar and template assemblies and bracket, and casting concrete, complete the part side wall and it is upper in
Veneer structure applies；
Step 10: being laid with the arch waterproof layer in layer 52 within the scope of the area III, and width is still the alternate paving of 1.5m and 2m
If two sides is needed to reserve enough length, until with waterproof layer of the layer 5 through laying is overlapped at the arch springing of two sides；
Step 11: the 3rd support replacement I-steel L is arranged to change using one between the vertical median septum 7 of two rows in layer 52
The second steel plate G, and the second steel plate G at the top of third support replacement I-steel L and arch are welded in support, the both ends of third support replacement I-steel L
Portion's waterproof interlayer uses rubber slab F to connect with longitudinal length for the lower flange crab bolt of the 4th support replacement I-steel M of 4.5m, third
Second steel plate G of the bottom support replacement I-steel L is connected by screw bolts with the horizontally-supported I-steel flange plate of first layer；
Step 12: the 2 two sides level branch of vertical supporting and layer 5 of the two sides on the horizontally-supported top of layer 52 is removed
Support, is removed from back to front, removes two Pin every time, is then laid with the waterproof layer in the area I and the area II, width is still 1.5m and 2m is alternate
It is laid with, and overlaps 0.25m, until so far completing a longitudinal direction 4.5m's long with the waterproof layer of two sides arch springing overlap joint 0.25m
Arch waterproof layer is laid with work；
Step 13: repeating step 10 to step 12, then carries out an arch support replacement and the work of waterproof layer lay cycle,
Arch waterproof layer until completing longitudinal direction 9m long is laid with work；
Step 14: setting up bracket, assembling reinforcement, installation template and casting concrete, completes applying for arch structure；
Step 15: the institute within the scope of the 9m is removed after the concrete of arch structure reaches 75% or more of design strength
There is remaining support, the construction into next 9m recycles, until whole constructing tunnel is completed.
Specific embodiment 2: embodiment is described with reference to Fig. 1, one the step of present embodiment in excavation supporting it is suitable
Sequence are as follows: stage excavation supporting from top to bottom, same layer elder generation two sides are intermediate again, complete all excavation and support work.So set
It sets, improves excavation and support efficiency, guarantee that safety, other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: embodiment is described with reference to Fig. 2, the first layer of present embodiment to layer 5 median septum
The distance between two neighboring I-steel exposed on 7 is 0.5m.So set, spacing is reasonable, convenient for guaranteeing the peace of supporting
Full performance.Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: the length direction of the Two bors d's oeuveres channel steel C of embodiment is described with reference to Fig.5, present embodiment
Both ends use welds with a thickness of the first steel plate 27 of 8mm, I-steel described in the web C-1 and step 2 of Two bors d's oeuveres channel steel C
Flange plate lap-joint uses 4 hole bolted-ons.So set, firm and reliable connection.Other compositions and connection relationship and specific reality
Apply mode one, two or three identical.
Specific embodiment 5: the first support replacement I-steel H and of embodiment is described with reference to Fig.7, present embodiment
The second steel plate G welding that the length direction both ends of two support replacement I-steel I are all made of with a thickness of 8mm, the first support replacement I-steel H and the
The top of two support replacement I-steel I and the channel steel flange plate of step 2 to the C of Two bors d's oeuveres channel steel described in step 5 use 4 hole bolt bolts
It connects, the bottom of the first support replacement I-steel H and the second support replacement I-steel I are mounted on rubber slab F.So set, support changing structure for use is more
Add securely, and avoids damage to splash guard.Other compositions and connection relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: illustrating present embodiment, each concreting of present embodiment in conjunction with Fig. 1 to Fig. 7
After the completion, the intensity of maintenance, which reaches 75% of design value or more, can carry out the next step.So set, vertical supporting is always
Retain, until domain tunnel, main structure applies completion, and concrete reaches 75% of design strength or more and just removes, while horizontal
Support is removed layer by layer from bottom to top, is not removed support and is played certain supporting role for main structure falsework,
Reduce bracket scaffolding height, to improve the pouring quality of concrete.Other compositions and connection relationship and specific embodiment party
Formula one, two, three, four or five are identical.
Specific embodiment 7: the first support replacement I-steel H and of embodiment is described with reference to Fig.7, present embodiment
The rubber slab F of two bottoms support replacement I-steel I is mounted on waterproof layer.So set, it is not damaged convenient for protection waterproof layer, and
Rubber slab F can play the role of elasticity adjustment during support.Other compositions and connection relationship and specific embodiment one,
Two, three, four, five or six are identical.
Specific embodiment 8: the length and width of the rubber slab F of embodiment is described with reference to Fig.7, present embodiment
It is 30cm, with a thickness of 2cm.So set, convenient for meeting actual support demand, other compositions and connection relationship and specific real
It is identical to apply mode one, two, three, four, five, six or seven.
Specific embodiment 9: the rubber slab F of embodiment is described with reference to Fig.7, present embodiment uses ethylene copolymer
Object modified pitch resin is made.So set, good water-proof effect, other compositions and connection relationship and specific embodiment one, two,
Three, four, five, six, seven or eight are identical.
Embodiment 1:
(1) firstly, using the excavation supporting method (such as Fig. 1) for being layered branch, stage excavation supporting from top to bottom, same layer
First two sides are intermediate again, complete all excavation and support work, carry out just branch back-grouting, and casting concrete bed course.
(2) then, first layer median septum concrete and reinforced mesh are abolished, (spacing is will remove 2 piece I-steel
0.5m) each 2 of front and back uses Two bors d's oeuveres channel steel C longitudinally connected for totally 6, then removes 2 every 4 to vertical supporting bottom I-steel
Root is shown in Fig. 4 a.
(3) it is laid with waterproof layer, then width 1.5m is changed among 2 I-steel A of dismounting using new I-steel H
Support, as shown in Figure 4 b.
(4) continue support replacement operation to remove in 4 I-steel of midfeather such as 6 I-steel of C connection among Fig. 4 b
Between 2, be laid with waterproof layer, width 2.0m, using in Fig. 4 c I-steel I progress support replacement.
(5) 1 in 4 I-steel of midfeather is successively removed again, and waterproof layer overlaps 0.25m, such as Fig. 4 c, recycles
I-steel H supports (such as Fig. 4 d) in this root position, removes I-steel and returns support, and successively method changes remaining 1 I-steel, such as schemes
4d, Fig. 4 e.
(6) waterproof layer for completing longitudinal 4.5m is laid with, and continues to be carried forward a working cycles according to above method, then
The waterproof layer for completing 4.5m is laid with.
(7) it should be noted that Two bors d's oeuveres channel steel beam-ends all uses the steel plate (25cm*25cm) of 8mm thickness to weld, web and work
The flange plate lap-joint of word steel is bolted using 4 hole bolts (diameter 28mm).I-steel H and the both ends I-steel I also use 8mm thickness
Steel plate (25cm*25cm) welding, top with channel steel flange plate also use 4 hole bolts (diameter 28mm) bolt, bottom be placed on
The steel plate G (25cm*25cm) of 8mm thickness on rubber slab F (being placed on waterproof layer, size 30cm*30cm, thick 2cm) is welded, and is such as schemed
7。
(8) base plate steel bar binding and template assemblies and casting concrete are carried out, tunnel floor structure (longitudinal long 9m) is completed
It applies, and has reserved steel bar end (side wall position etc.).
(9) it is horizontally-supported that second layer two sides are removed, side wall waterproof layer is laid with, carries out the horizontally-supported following part side of third layer
The binding of wall reinforcing bar and template assemblies and bracket and casting concrete, complete applying for the part sidewall structure.
(10) it is horizontally-supported that third layer two sides are removed, side wall waterproof layer is laid with, carries out the 4th layer of horizontally-supported following part
Side wall and the binding of lower middle plate reinforcing bar and template assemblies and bracket and casting concrete, complete the part side wall and lower middle layer are hardened
Structure applies.
(11) it is horizontally-supported that the 4th layer of two sides are removed, side wall waterproof layer is laid with, carries out the horizontally-supported following part of layer 5
Side wall and the binding of upper middle plate reinforcing bar and template assemblies and bracket and casting concrete, complete the part side wall and upper middle layer are hardened
Structure applies.
(12) the arch waterproof layer being laid within the scope of the area III, width are still the alternate laying of 1.5m and 2m, need two sides reserved
Enough length, until being overlapped with the waterproof layer laid at the arch springing of two sides.
(13) it is replaced, both ends welding steel G, and pushed up using the new I-steel L of a row between two rows of vertical I-steel
Portion's steel plate and longitudinal length be the lower flange crab bolt of the I-steel M of 4.5m connect, bottom steel plate and the horizontally-supported work of layer 5
Word steel flange plate is connected by screw bolts, as shown in Figure 3.Bolt is all 4 hole bolts, diameter 28mm, and the longitudinal pitch of I-steel L is
1.5m。
(14) vertical supporting and the layer 5 two sides for removing the two sides on the horizontally-supported top of layer 5 are horizontally-supported, from rear past
Two Pin are removed in preceding dismounting every time, are then laid with the waterproof layer in the area I and the area II, width is still the alternate laying of 1.5m and 2m, and takes
0.25m is met, until overlapping 0.25m with the waterproof layer of two sides arch springing.
(15) the arch waterproof layer for completing longitudinal direction 4.5m long is laid with work, then carries out an arch support replacement and waterproof layer laying
Cycle operation, the arch waterproof layer until completing longitudinal direction 9m long are laid with work.
(16) bracket, assembling reinforcement, installation template and casting concrete are set up, applying for arch structure is completed.
(17) it should be noted that needing to conserve, until intensity reaches design value every time after the completion of concreting
75% or more can carry out the next step.
(18) it is removed after the concrete of arch structure reaches 75% or more of design strength all surplus within the scope of the 9m
Remaining support, the construction into next 9m recycle, until whole constructing tunnel is completed.
Claims (9)
1. the construction method of a kind of subway large section tunnel tunneling support replacement and main structure, it is characterised in that: subway super large is disconnected
Face tunnel excavation main structure is used constructs along the practice, implementation process are as follows:
Step 1: after the completion of excavating just branch and back-grouting, casting concrete bed course；
Using the excavation supporting method of layering branch, stage excavation supporting from top to bottom carries out just branch back-grouting, and pours mixed
Solidifying soil padding, forms foundation pit supporting construction (1)；
Step 2: concrete and reinforced mesh (8) are abolished, removes part I-steel for the first time；
Foundation pit supporting construction (1) is followed successively by layer 5 (2), the 4th layer (3), third layer (4), the second layer (5) and from the bottom to top
One layer (6)；
Abolish the concrete and reinforced mesh (8) on first layer median septum (7), from left to right successively expose be equally spaced it is multiple
I-steel；Multiple I-steel are followed successively by the first I-steel (9), the second I-steel (10), third I-steel (11), from left to right
Four I-steel (12), the 5th I-steel (13), the 6th I-steel (14), the 7th I-steel (15), the 8th I-steel (16), the 9th
I-steel (17), the tenth I-steel (18), the 11st I-steel (19), the 12nd I-steel (20), the 13rd I-steel (21),
14th I-steel (22), the 15th I-steel (23) and the 16th I-steel (24)；First I-steel (9) is to the 8th I-steel
It (16) is first group of vertical supporting, the 9th I-steel (17) to the 16th I-steel (24) is second group of vertical supporting；
The middle part of first group of vertical supporting and second group of vertical supporting passes through horizontally disposed Two bors d's oeuveres channel steel (C) connection, to perpendicular
2 are removed every 4 to the I-steel of support bottom, i.e. dismounting the 5th I-steel (13), the 6th I-steel (14), the 11st work
Word steel (19) and the 12nd I-steel (20)；
Step 3: waterproof layer and support replacement are laid with；
In the 5th I-steel (13) of dismounting and the 6th I-steel (14) and the 11st I-steel (19) and the 12nd I-steel
(20) lower end is laid with the first waterproof layer (25) that width is 1.5m respectively, then in the 5th I-steel (13) of dismounting and the 6th
The Two bors d's oeuveres channel steel middle position (C) and the 11st I-steel (19) and the 12nd I-steel (20) between I-steel (14) it
Between the Two bors d's oeuveres channel steel middle position (C) using the first support replacement I-steel (H) support；
Step 4: second dismounting part I-steel, and it is laid with waterproof layer and support replacement；
The top of the 6th I-steel (14) to the 11st I-steel (19) is connected by Two bors d's oeuveres channel steel (C) again, removes the
The vertical supporting bottom of eight I-steel (16) and the 9th I-steel (17), and removing the 8th I-steel (16) and the 9th I-steel
(17) bottom is laid with the second waterproof layer (26) that width is 2.0m, between the 8th I-steel (16) and the 9th I-steel (17)
Two bors d's oeuveres channel steel (C) is supported by the second support replacement I-steel (I) in the vertical direction；
Step 5: third time removes part I-steel, and is laid with waterproof layer and support replacement；
1 in 4 I-steel of midfeather, i.e. the tenth I-steel (18), in the tenth I-steel (18) are successively removed again
The overlap joint between the first waterproof layer (25) and the second waterproof layer (26) is done in lower end, and the waterproof layer lap of splice is 0.25m；
It is supported again by the first support replacement I-steel (H) in this root position, i.e., the first support replacement I-steel (H) is supported on the tenth I-steel
(18) on the Two bors d's oeuveres channel steel (C) below；
Remaining 1 I-steel, i.e. the 7th I-steel (15) are changed according to the method, is done below the 7th I-steel (15)
Overlap joint between one waterproof layer (25) and the second waterproof layer (26), the waterproof layer lap of splice are 0.25m；
So far, the waterproof layer for completing longitudinal 4.5m is laid with, and continues to be carried forward according to the method for step 2 to step 5 next
A working cycles, then complete the waterproof layer laying of a 4.5m；
Step 6: the waterproof layer completed is laid with and carries out base plate steel bar binding and template assemblies, and casting concrete, is completed
Tunnel floor structure applies；
Step 7: the dismounting second layer (5) two sides are horizontally-supported, are laid with side wall waterproof layer, and it is horizontally-supported following to carry out third layer (4)
The binding of part side wall reinforcing bar and template assemblies and bracket, and casting concrete, complete applying for the part sidewall structure；
Step 8: dismounting third layer (4) two sides are horizontally-supported, are laid with side wall waterproof layer, and the 4th layer of progress (3) is horizontally-supported following
Part side wall and the binding of lower middle plate reinforcing bar and template assemblies and bracket, and casting concrete, complete the part side wall and it is lower in
Veneer structure applies；
Step 9: the 4th layer of (3) two sides of dismounting are horizontally-supported, are laid with side wall waterproof layer, and it is horizontally-supported following to carry out layer 5 (2)
Part side wall and the binding of upper middle plate reinforcing bar and template assemblies and bracket, and casting concrete, complete the part side wall and it is upper in
Veneer structure applies；
Step 10: being laid with the arch waterproof layer in layer 5 (2) within the scope of the area III, and width is still the alternate laying of 1.5m and 2m,
Need two sides to reserve enough length, until with waterproof layer of the layer 5 through laying is overlapped at the arch springing of two sides；
Step 11: between the vertical median septums (7) of two rows in layer 5 (2) using one arrange the 3rd support replacement I-steel (L) come
The second steel plate (G) is welded at the both ends of support replacement, third support replacement I-steel (L), and second steel at the top of third support replacement I-steel (L)
Plate (G) and arch waterproof interlayer use rubber slab (F) and longitudinal length for the bottom wing listrium of the 4th support replacement I-steel (M) of 4.5m
It is bolted, second steel plate (G) and the horizontally-supported I-steel flange plate of first layer of the bottom third support replacement I-steel (L) use spiral shell
It tethers and connects；
Step 12: the vertical supporting and layer 5 (2) two sides level branch of the two sides on layer 5 (2) horizontally-supported top are removed
Support, is removed from back to front, removes two Pin every time, is then laid with the waterproof layer in the area I and the area II, width is still 1.5m and 2m is alternate
It is laid with, and overlaps 0.25m, until so far completing a longitudinal direction 4.5m's long with the waterproof layer of two sides arch springing overlap joint 0.25m
Arch waterproof layer is laid with work；
Step 13: repeating step 10 to step 12, then carries out an arch support replacement and the work of waterproof layer lay cycle, until
The arch waterproof layer for completing longitudinal direction 9m long is laid with work；
Step 14: setting up bracket, assembling reinforcement, installation template and casting concrete, completes applying for arch structure；
Step 15: it is removed after the concrete of arch structure reaches 75% or more of design strength all surplus within the scope of the 9m
Remaining support, the construction into next 9m recycle, until whole constructing tunnel is completed.
2. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 1 and main structure,
It is characterized in that: the excavation-support order in step 1 are as follows: stage excavation supporting from top to bottom, same layer elder generation two sides are intermediate again, complete
It works at all excavation and supports, pulls open 3~5m distance between each pilot tunnel.
3. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 2 and main structure,
Be characterized in that: the distance between the two neighboring I-steel exposed on first layer to layer 5 median septum (7) is 0.5m.
4. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 1 and main structure,
Be characterized in that: the length direction both ends of Two bors d's oeuveres channel steel (C) use welds with a thickness of the first steel plate (27) of 8mm, Two bors d's oeuveres channel steel (C)
Web (C-1) and step 2 described in I-steel flange plate lap-joint use 4 hole bolted-ons.
5. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 4 and main structure,
Be characterized in that: the length direction both ends of the first support replacement I-steel (H) and the second support replacement I-steel (I) are all made of with a thickness of 8mm's
Second steel plate (G) welding, the top and step 2 of the first support replacement I-steel (H) and the second support replacement I-steel (I) are into step 5
The channel steel flange plate of the Two bors d's oeuveres channel steel (C) uses 4 hole bolted-ons, the first support replacement I-steel (H) and the second support replacement I-shaped
The bottom of steel (I) is mounted on rubber slab (F).
6. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 1 and main structure,
Be characterized in that: after the completion of each concreting, the intensity of maintenance, which reaches 75% of design value or more, can carry out next step work
Sequence.
7. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 5 and main structure,
Be characterized in that: the first support replacement I-steel (H) and the rubber slab (F) of second bottom support replacement I-steel (I) are mounted on waterproof layer.
8. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 7 and main structure,
Be characterized in that: the length and width of rubber slab (F) is 30cm, with a thickness of 2cm.
9. the construction method of a kind of subway large section tunnel tunneling support replacement according to claim 8 and main structure,
Be characterized in that: rubber slab (F) is made of ethylene copolymer-modified asphaltic resin.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485893A (en) * | 2019-10-10 | 2020-08-04 | 上海申通地铁集团有限公司 | Earth excavation construction method for pipe curtain channel with oversized cross section in saturated soft soil area |
| CN113323132A (en) * | 2021-06-11 | 2021-08-31 | 中国五冶集团有限公司 | Large-volume concrete double-layer reinforcing steel bar support replacing, installing and constructing method |
| CN116025005A (en) * | 2023-01-05 | 2023-04-28 | 北京住总集团有限责任公司 | Subway station main body structure construction method influenced by double rows of lattice columns |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006342518A (en) * | 2005-06-07 | 2006-12-21 | Shimizu Corp | Insulation coating structure of frozen ground surface, and insulation coating method for frozen ground surface |
| CN105464686A (en) * | 2015-12-31 | 2016-04-06 | 上海建工集团股份有限公司 | Multistory underground space screen frame type tunneling construction method under existing facilities and support structure |
| CN106567718A (en) * | 2015-10-10 | 2017-04-19 | 中铁隧道勘测设计院有限公司 | Construction method for composite stratum single-arch super long-span subway station through groove broaching and support substitution |
| CN107218064A (en) * | 2017-07-19 | 2017-09-29 | 北京建工土木工程有限公司 | A kind of large cross-section tunnel changes support and two lining construction methods |
| CN108915725A (en) * | 2018-06-12 | 2018-11-30 | 中铁二十局集团轨道交通工程有限公司 | A kind of small template lining construction method in double -side approach tunnel |
-
2018
- 2018-12-27 CN CN201811613136.4A patent/CN109372558B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006342518A (en) * | 2005-06-07 | 2006-12-21 | Shimizu Corp | Insulation coating structure of frozen ground surface, and insulation coating method for frozen ground surface |
| CN106567718A (en) * | 2015-10-10 | 2017-04-19 | 中铁隧道勘测设计院有限公司 | Construction method for composite stratum single-arch super long-span subway station through groove broaching and support substitution |
| CN105464686A (en) * | 2015-12-31 | 2016-04-06 | 上海建工集团股份有限公司 | Multistory underground space screen frame type tunneling construction method under existing facilities and support structure |
| CN107218064A (en) * | 2017-07-19 | 2017-09-29 | 北京建工土木工程有限公司 | A kind of large cross-section tunnel changes support and two lining construction methods |
| CN108915725A (en) * | 2018-06-12 | 2018-11-30 | 中铁二十局集团轨道交通工程有限公司 | A kind of small template lining construction method in double -side approach tunnel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485893A (en) * | 2019-10-10 | 2020-08-04 | 上海申通地铁集团有限公司 | Earth excavation construction method for pipe curtain channel with oversized cross section in saturated soft soil area |
| CN113323132A (en) * | 2021-06-11 | 2021-08-31 | 中国五冶集团有限公司 | Large-volume concrete double-layer reinforcing steel bar support replacing, installing and constructing method |
| CN116025005A (en) * | 2023-01-05 | 2023-04-28 | 北京住总集团有限责任公司 | Subway station main body structure construction method influenced by double rows of lattice columns |
| CN116025005B (en) * | 2023-01-05 | 2023-07-25 | 北京住总集团有限责任公司 | Subway station main body structure construction method influenced by double rows of lattice columns |
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