CN106677802A - Construction method of tunnel inverted arch pouring structure - Google Patents
Construction method of tunnel inverted arch pouring structure Download PDFInfo
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- CN106677802A CN106677802A CN201611238259.5A CN201611238259A CN106677802A CN 106677802 A CN106677802 A CN 106677802A CN 201611238259 A CN201611238259 A CN 201611238259A CN 106677802 A CN106677802 A CN 106677802A
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- inverted arch
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- 238000010276 construction Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000003351 stiffener Substances 0.000 claims description 21
- 238000009412 basement excavation Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000009415 formwork Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 101150097977 arch-1 gene Proteins 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a construction method of a tunnel inverted arch pouring structure. The main construction method comprises the following steps that (1) installation and emplacement of a construction platform are conducted; (2) inverted arch formworks are mounted; (3) inverted arch pouring is conducted; (4) inverted arch mould dismounting is conducted; and (5) inverted arch backfill is conducted. A self-propelled whole moving mould frame is adopted, and according to the requirement of the construction progress, under the effect of a driving device, the positions of box beams can be automatically moved, so that the problems that the tunnel inverted arch construction progress is slow, and the construction quality is not easy to guarantee are solved. The design is reasonable, realization is convenient, the construction process is easy and convenient, offset of the formworks does not occur in the construction process, the construction effect is good, the construction progress of a tunnel inverted arch can be quickened, and the construction quality of the construction forming inverted arch of is easy to guarantee, and meanwhile, the construction safety can be improved.
Description
Technical field
The present invention relates to tunnel construction technical field, more particularly to the construction method of tunnel inverted arch pouring structure.
Background technology
Inverted arch is to be arranged on the reverse domes of tunnel bottom to improve top supporting construction stress condition, and it is tunnel
One of key component of road structure, and be the basis of tunnel structure.On the one hand inverted arch is laminated on the ground on tunnel top
Power is effectively delivered to underground by tunnel side wall structure or by the load on road surface, but also is reasonably resistant to tunnel bottom ground
The counter-force that layer is transmitted.Inverted arch constitutes tunnel entirety with Tunnel Second Lining, and increases the stability of tunnel structure.
When nowadays constructing to tunnel inverted arch, generally pouring construction is carried out using Combined formwork, due to being constructed
Tunnel inverted arch is reverse arch, long, falsework the time required to there is formwork support arrangement and installation difficulty, formwork during practice of construction
The consumption of support reinforcing bar is big, input construction cost is high, concreting is inconvenient, template is susceptible to skew, construction quality not
Easily ensure, the problems such as working security is difficult to ensure that.
Thus, a kind of convenient reasonable in design, realization, work progress simplicity need to be designed at present and template in construction process will not
The good tunnel inverted arch construction mould bases of skew, construction effect and tunnel inverted arch construction method, can not only accelerate the construction of tunnel inverted arch
Progress, and the inverted arch construction quality of institute's construction molding be easy to ensure and can be while improving working security.
The content of the invention
For the above-mentioned problems in the prior art, it is an object of the invention to using a kind of tunnel inverted arch pouring structure
Construction method, it moves integrally mould bases using self-propelled, and to solve, inverted arch construction speed in tunnel is slow, construction quality is difficult to ensure
The problems such as.
The construction method of described tunnel inverted arch pouring structure, it is characterised in that including following construction procedure：
1）Operation platform is installed and in place：From box beam as platform beam, first box beam is assembled, box beam two ends bottom wing
Wheel sub-base and wheel are provided with edge, wheel can carry out vertical and horizontal movement, the wheel sub-base gimbal lever, box beam are provided between wheel
Driving means are installed near hole end, for adjusting the position of box beam, working stand is symmetrically welded in box girder web both sides,
Interior setting box beam longitudinal stiffener, box beam longitudinal direction are separated near what working stand side box beam transverse stiffener and box girder web were formed
Ribbed stiffener lower section web is hollow, forms escaping exit, and prewelding push rod connection end plate at box beam lower flange, push rod is welded with template pressure
Block, the gimbal lever is bolted is fixed on operation platform plate, and scalable depression bar is bolted and is fixed on the gimbal lever two
End, scalable depression bar bottom welding has template briquetting, diagonal brace is connected between the scalable depression bar in both sides, and case is fixed in diagonal brace one end
At lower flange of girder edge, the other end is fixed on scalable depression bar bottom, is supported in box beam one end by lifting and construct at inverted arch, separately
One end is supported at non-excavation section, and cast-in-place inverted arch is located at and constructs between inverted arch and non-excavation section；
2）Inverted arch model sheetinstallat：First pass through peg to be assembled inverted arch cheek board with inverted arch Side Template, obtain integral mold plate, so
Integral mold plate is fixed in precalculated position by the middle part dowel of inverted arch Side Template bottom afterwards, leads to domatic dowel after stablizing
Cross at inverted arch Side Template preformed hole and fix side plate bending, finally adjust scalable depression bar, hold out against inverted arch cheek board from above, and pacify
Dress push rod fixes inverted arch cheek board；
3）Inverted arch is poured：Cast-in-place inverted arch is poured and does not stay longitudinal direction to apply between end to pouring in the form of zonal cooling is poured
Work is stitched；
4）Inverted arch form removal：Form removal is carried out after inverted arch concrete reaches predetermined strength, jack is arranged on into box beam（6）Two ends bottom
Portion, lifting box beam first removes push rod, adjusts scalable depression bar and disengages it from template and removed, and during form removal, first removes
Inverted arch cheek board, then remove inverted arch Side Template；
5）Inverted arch is backfilled, and is backfilled to the position that inverted arch fills top surface line.
The construction method of described tunnel inverted arch pouring structure, it is characterised in that step 1）Described in operation platform plate and case
Cushion block is provided between beam, cushion block top is welded to connect with operation platform plate lower surface, cushion block bottom is welded with box beam top flange top surface
Connect in succession.
The construction method of described tunnel inverted arch pouring structure, it is characterised in that step 2）Described in inverted arch Side Template outside
Simultaneously it is provided with template ribbed stiffener.
The construction method of described tunnel inverted arch pouring structure, it is characterised in that domatic dowel is arranged at inverted arch Side Template two
On side slope, and it is symmetricly set on middle part dowel both sides.
Described a kind of tunnel inverted arch pouring structure, including inverted arch of constructing, non-excavation section, cast-in-place inverted arch, inverted arch side mould
Plate, box beam, working stand, escaping exit, wheel sub-base, wheel, scalable depression bar, the gimbal lever, push rod, push rod connection end plate, template
Briquetting, operation platform plate, inverted arch Side Template, it is characterised in that box beam one end is supported in and construct at inverted arch, and the other end is supported in
At non-excavation section, wheel sub-base is provided with the lower flange of box beam two ends, wheel is arranged in wheel sub-base, and box beam is near hole one end
Place is provided with the driving means being connected with wheel, and box beam is provided with box beam transverse stiffener, and working stand is symmetrically welded in box beam abdomen
Plate both sides, the interior setting box beam that separates formed between the box beam transverse stiffener and box girder web of working stand side longitudinally adds
Strength rib, box beam longitudinal stiffener lower section web is hollow structure, forms escaping exit, and at box beam lower flange prewelding push rod connection end
Plate, push rod upper end is connected end plate connection with push rod, and push rod lower end is welded with template briquetting, and scalable depression bar is bolted solid
Outer support frame is formed due to gimbal lever two ends, operation platform plate is secured by bolts in the gimbal lever of two neighboring outer support frame
On, scalable depression bar bottom welding has template briquetting, and inverted arch cheek board is fixedly connected with inverted arch Side Template by peg, and installs
Above cast-in-place inverted arch, scalable depression bar, push rod bottom are contacted and are connected by template briquetting and inverted arch cheek board.
Described a kind of tunnel inverted arch pouring structure, it is characterised in that be connected between the scalable depression bar of gimbal lever both sides
Diagonal brace, diagonal brace one end is fixed at box beam lower flange, and the other end is fixed on scalable depression bar bottom.
Described a kind of tunnel inverted arch pouring structure, it is characterised in that middle part dowel is provided with the middle of inverted arch Side Template bottom,
Bottom both sides cambered surface bottom is provided with domatic dowel, and template ribbed stiffener is interval with inside inverted arch Side Template.
Described a kind of tunnel inverted arch pouring structure, it is characterised in that wheel sub-base is provided between the wheel at box beam two ends and is put down
Weighing apparatus bar.
Described a kind of tunnel inverted arch pouring structure, it is characterised in that operation platform plate lower section is welded with cushion block, under cushion block
Portion is welded in box beam top flange top surface.
The construction method of described tunnel inverted arch pouring structure, it is characterised in that the hollow clear span of box section is not less than
550mm, escaping exit clear height is not less than 800mm.
By the way that using above-mentioned technology, compared with prior art, beneficial effects of the present invention are as follows：It adopts self-propelled entirety
Mobile formwork, requires according to construction speed, under driving means effect, can be with the position of automatic moving box beam, to solve tunnel
Inverted arch construction speed is slow, construction quality is difficult the problems such as ensureing, its reasonable in design, realization is convenient, work progress is easy and constructs
During template will not offset, construction effect it is good, can not only accelerate the construction speed of tunnel inverted arch, and institute's construction molding is faced upward
Arch construction quality be easy to ensure and can be while improving working security.
Description of the drawings
Fig. 1 is inverted arch structure longitudinal direction schematic diagram；
Fig. 2 is the horizontal schematic diagram of inverted arch structure；
Fig. 3 is inverted arch formwork structure schematic diagram.
In figure：1. constructed inverted arch；2. non-excavation section；3. cast-in-place inverted arch；4. inverted arch cheek board；5. inverted arch fills top surface
Line；6. box beam；7. driving means；8. working stand；9. escaping exit；10. box beam longitudinal stiffener；11. box beam transverse stiffeners；
12. wheel sub-bases；13. wheels；14. scalable depression bars；15. gimbal levers；16. push rods；17. push rods connect end plate；18. template pressures
Block；19. diagonal braces；20. operation platform plates；21. cushion blocks；The 22. wheel sub-base gimbal levers；23. inverted arch Side Templates；24. middle part dowels；
25. domatic dowels；26. template ribbed stiffeners.
Specific embodiment
The present embodiment is repeated no more to the welding that is related in invention and hoisting, only pair the present invention relates to crucial skill
Art is illustrated.It is specific as follows：
A kind of construction method of tunnel inverted arch pouring structure of the present invention, including following construction procedure：
1）Operation platform is installed and in place：From box beam 6 as platform beam, first box beam 6 is assembled, the two ends of box beam 6
Wheel sub-base 12 is provided with lower flange, wheel 13 can carry out vertical and horizontal movement, the wheel sub-base gimbal lever is provided between wheel 13
22, box beam 6 is provided with driving means 7 near hole end, and working stand 8 is symmetrically welded in the web both sides of box beam 6, near work
Terraced 8 side box beam transverse stiffener 11 separates interior setting box beam longitudinal stiffener 10 with the formation of the web of box beam 6, and box beam longitudinally adds
The lower section web of strength rib 10 is hollow, forms escaping exit 9, and prewelding push rod connection end plate 17 at the lower flange of box beam 6, push rod 16 is welded with
Template briquetting 18, scalable depression bar 14 is bolted and is fixed on the two ends of the gimbal lever 15, constitutes outer support frame, two neighboring outer
It is fixedly connected with operation platform plate 20 by bolt between the gimbal lever 15 of bracing frame, the bottom welding of scalable depression bar 14 has template
Briquetting 18, is connected with diagonal brace 19 between the scalable depression bar 14 in both sides, the one end of diagonal brace 19 is fixed at the lower flange of box beam 6, the other end
The bottom of scalable depression bar 14 is fixed on, the side one end of box beam 6 is supported with inverted arch 1 of constructing by lifting, the other end is propped up
Support at non-excavation section 2, in order to improve safety during construction, the present invention is welded with cushion block under the operation platform plate 20
21, the lower weld of cushion block 21 is in the top flange top surface of box beam 6 so as to which structure is more firm；
As Figure 1-3, a kind of tunnel inverted arch pouring structure of the invention, including inverted arch 1 of constructing, non-excavation section 2, cast-in-place faces upward
Arch 3, inverted arch cheek board 4, inverted arch filling top surface line 5, box beam 6, driving means 7, working stand 8, escaping exit 9, box beam are longitudinally put more energy into
Rib 10, box beam transverse stiffener 11, wheel sub-base 12, wheel 13, scalable depression bar 14, the gimbal lever 15, the connection of push rod 16, push rod
End plate 17, template briquetting 18, diagonal brace 19, operation platform plate 20, cushion block 21, the wheel sub-base gimbal lever 22, inverted arch Side Template 23, in
Portion's dowel 24, domatic dowel 25 and template ribbed stiffener 26；Working stand 8 is symmetrically welded in the web both sides of box beam 6, near working stand 8
Side box beam transverse stiffener 11 separates interior setting box beam longitudinal stiffener 10 with the web of box beam 6 is formed, and box beam is longitudinally put more energy into
The lower section web of rib 10 is hollow, forms escaping exit 9, prewelding push rod connection end plate 17, the upper end of push rod 16 and top at the lower flange of box beam 6
Bar connection end plate 17 connects, and lower end is welded to connect with template briquetting 18, and scalable depression bar 14 is bolted and is fixed on balance
The two ends of bar 15, constitute outer support frame, are consolidated with operation platform plate 20 by bolt between the gimbal lever 15 of two neighboring outer support frame
Fixed connection, the bottom welding of scalable depression bar 14 has template briquetting 18, in order that box girder 6 and supporting construction balance, the present invention
Diagonal brace 19 is connected between the scalable depression bar 14 of each outer support frame both sides, the lower flange of box beam 6 is fixed in the one end of diagonal brace 19
Place, the other end is fixed on the bottom of scalable depression bar 14, and inverted arch template is made up of inverted arch cheek board 4 and inverted arch Side Template 23, inverted arch
Cheek board 4 is fixed with inverted arch Side Template 23 by peg, and middle part dowel 24, both sides cambered surface are provided with the middle of the bottom of inverted arch Side Template 23
Bottom is provided with domatic dowel 25, and the upper surface of inverted arch cheek board 4 is tight by template briquetting 18 by scalable depression bar 14 and push rod 16
Cooperation is contacted, and is fixed；
2）Inverted arch model sheetinstallat：The assembling of inverted arch cheek board 4 and inverted arch Side Template 23 is first carried out, then by the non-detachable mold being assembled into
Plate is fixed in precalculated position by the middle part dowel 24 of the bottom of inverted arch Side Template 23, by domatic dowel 25 by facing upward after stablizing
Preformed hole fixes side plate bending at arch abutment template 23, finally adjusts scalable depression bar 14, and inverted arch cheek board 4 is held out against, and installs push rod
16 fix inverted arch cheek board 4, and the outside of inverted arch Side Template 23 one side is provided with template ribbed stiffener 26；
3）Inverted arch is poured：Poured in the form of zonal cooling is poured, to pour and do not stay longitudinal construction joint between end；
4）Inverted arch form removal：Form removal is carried out after inverted arch concrete reaches predetermined strength, jack is arranged on into the two ends bottom of box beam 6
Portion, lifting box beam 6 first removes push rod 16, adjusts scalable depression bar 14 and disengages it from template and removed, first by inverted arch side mould
Plate 4 is removed, then removes inverted arch Side Template 23；
5）Inverted arch is backfilled.
With reference to shown in Fig. 1, the cross-sectional hollow clear span of box beam 6 is not less than 550mm in figure, and the clear height of escaping exit 9 is not less than 800mm,
Box beam 6 can arrange epitaxial structure near tunnel portal side so that passway for escaping can always along to tunnel outer.
Claims (5)
1. the construction method of tunnel inverted arch pouring structure, it is characterised in that including following construction procedure：
1）Operation platform is installed and in place：From box beam（6）As platform beam, first by box beam（6）Assembled, box beam
（6）Wheel sub-base is provided with the lower flange of two ends（12）And wheel（13）, wheel（13）Vertical and horizontal movement, wheel can be carried out（13）
Between be provided with the wheel sub-base gimbal lever（22）, box beam（6）Driving means are installed near hole end（7）, for regulating box
Beam（6）Position, working stand（8）It is symmetrically welded in box beam（6）Web both sides, near working stand（8）Side box beam lateral stiffening
Rib（11）With box beam（6）What web was formed separates interior setting box beam longitudinal stiffener（10）, box beam longitudinal stiffener（10）Lower section
Web is hollow, forms escaping exit（9）, box beam（6）Prewelding push rod connection end plate at lower flange（17）, push rod（16）Upper end and top
Bar connects end plate（17）Connection, push rod（16）Lower end is welded with template briquetting（18）, the gimbal lever（15）It is bolted fixation
In operation platform plate（20）On, scalable depression bar（14）It is bolted and is fixed on the gimbal lever（15）Two ends, scalable depression bar
（14）Bottom welding has template briquetting（18）, the scalable depression bar in both sides（14）Between be connected with diagonal brace（19）, diagonal brace（19）One end
It is fixed on box beam（6）At lower flange, the other end is fixed on scalable depression bar（14）Bottom, by lifting box beam（6）One end
Support inverted arch of constructing in（1）Place, the other end is supported in non-excavation section（2）Place, cast-in-place inverted arch（3）Construct positioned at inverted arch（1）With
Non- excavation section（2）Between；
2）Inverted arch model sheetinstallat：Peg is first passed through by inverted arch cheek board（4）With inverted arch Side Template（23）Assembled, obtained entirety
Template, then passes through inverted arch Side Template by integral mold plate（23）The middle part dowel of bottom（24）It is fixed in precalculated position, it is stable
Afterwards by domatic dowel（25）By inverted arch Side Template（23）Place's preformed hole fixes side plate bending, finally adjusts scalable depression bar
（14）, from above by inverted arch cheek board（4）Hold out against, and push rod is installed（16）Fixed inverted arch cheek board（4）；
3）Inverted arch is poured：The cast-in-place inverted arch in the form of zonal cooling is poured（3）To pouring, to pour and do not stay longitudinal direction between end
Construction joint；
4）Inverted arch form removal：Form removal is carried out after inverted arch concrete reaches predetermined strength, jack is arranged on into box beam（6）Two ends bottom
Portion, lifting box beam（6）, first remove push rod（16）, adjust scalable depression bar（14）Disengage it from template and removed, remove mould
During plate, inverted arch cheek board is first removed（4）, then remove inverted arch Side Template（23）；
5）Inverted arch is backfilled, and is backfilled to inverted arch filling top surface line（5）Position.
2. the construction method of inverted arch pouring structure in tunnel according to claim 1, it is characterised in that step 1）Described in apply
Work landing slab（20）With box beam（6）Between be provided with cushion block（21）, cushion block（21）Top and operation platform plate（20）Lower surface is welded
Connection, cushion block（21）Bottom and box beam（6）Top flange top surface is welded to connect.
3. the construction method of inverted arch pouring structure in tunnel according to claim 1, it is characterised in that step 2）Described in face upward
Arch abutment template（23）Outside one side is provided with template ribbed stiffener（26）.
4. the construction method of inverted arch pouring structure in tunnel according to claim 1, it is characterised in that domatic dowel（25）If
It is placed in inverted arch Side Template（23）On two side slopes, and it is symmetricly set on middle part dowel（24）Both sides.
5. the construction method of inverted arch pouring structure in tunnel according to claim 1, it is characterised in that box beam（6）Cross-sectional hollow
Clear span is not less than 550mm, escaping exit（9）Clear height is not less than 800mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238259.5A CN106677802B (en) | 2016-12-28 | 2016-12-28 | The construction method of tunnel inverted arch pouring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238259.5A CN106677802B (en) | 2016-12-28 | 2016-12-28 | The construction method of tunnel inverted arch pouring structure |
Publications (2)
| Publication Number | Publication Date |
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| CN106677802A true CN106677802A (en) | 2017-05-17 |
| CN106677802B CN106677802B (en) | 2018-07-24 |
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ID=58872050
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611238259.5A Active CN106677802B (en) | 2016-12-28 | 2016-12-28 | The construction method of tunnel inverted arch pouring structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001173386A (en) * | 1999-12-16 | 2001-06-26 | Maeda Corp | Concrete placing equipment using invert formwork and method therefor |
| CN101967985A (en) * | 2010-09-08 | 2011-02-09 | 中铁隧道集团三处有限公司 | Self-propelled inverted arch template construction method |
| CN103195450A (en) * | 2013-04-03 | 2013-07-10 | 湖南远东钢模电子科技有限责任公司 | Hydraulic tunnel inverted arch operation trolley and inverted arch construction method |
| CN203296781U (en) * | 2013-06-08 | 2013-11-20 | 中铁十七局集团第四工程有限公司 | Tunnel self-propelled inverted arch formwork trolley |
| CN204267068U (en) * | 2014-11-14 | 2015-04-15 | 四川睿铁科技有限责任公司 | A kind of inverted arch mould bases carrying moving emergency passway for escaping |
| CN105134253A (en) * | 2015-07-09 | 2015-12-09 | 中铁十二局集团有限公司 | Tunnel inverted arch combined integrated template and method for concreting construction |
| CN204941569U (en) * | 2015-09-07 | 2016-01-06 | 中铁四局集团第四工程有限公司 | Tunnel invert trolley formwork system |
-
2016
- 2016-12-28 CN CN201611238259.5A patent/CN106677802B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001173386A (en) * | 1999-12-16 | 2001-06-26 | Maeda Corp | Concrete placing equipment using invert formwork and method therefor |
| CN101967985A (en) * | 2010-09-08 | 2011-02-09 | 中铁隧道集团三处有限公司 | Self-propelled inverted arch template construction method |
| CN103195450A (en) * | 2013-04-03 | 2013-07-10 | 湖南远东钢模电子科技有限责任公司 | Hydraulic tunnel inverted arch operation trolley and inverted arch construction method |
| CN203296781U (en) * | 2013-06-08 | 2013-11-20 | 中铁十七局集团第四工程有限公司 | Tunnel self-propelled inverted arch formwork trolley |
| CN204267068U (en) * | 2014-11-14 | 2015-04-15 | 四川睿铁科技有限责任公司 | A kind of inverted arch mould bases carrying moving emergency passway for escaping |
| CN105134253A (en) * | 2015-07-09 | 2015-12-09 | 中铁十二局集团有限公司 | Tunnel inverted arch combined integrated template and method for concreting construction |
| CN204941569U (en) * | 2015-09-07 | 2016-01-06 | 中铁四局集团第四工程有限公司 | Tunnel invert trolley formwork system |
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| Publication number | Publication date |
|---|---|
| CN106677802B (en) | 2018-07-24 |
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