CN110206037A - A kind of flexible construction method of underground continuous wall of steel strand wires as main reinforcement - Google Patents
A kind of flexible construction method of underground continuous wall of steel strand wires as main reinforcement Download PDFInfo
- Publication number
- CN110206037A CN110206037A CN201910362240.9A CN201910362240A CN110206037A CN 110206037 A CN110206037 A CN 110206037A CN 201910362240 A CN201910362240 A CN 201910362240A CN 110206037 A CN110206037 A CN 110206037A
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- China
- Prior art keywords
- steel strand
- strand wires
- main reinforcement
- reinforcing bar
- continuous wall
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 79
- 239000010959 steel Substances 0.000 title claims abstract description 79
- 230000002787 reinforcement Effects 0.000 title claims abstract description 61
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 48
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 26
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000004888 barrier function Effects 0.000 abstract description 3
- 210000002421 cell wall Anatomy 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 abstract 1
- 210000003205 muscle Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
A kind of flexible construction method of underground continuous wall the invention discloses steel strand wires as main reinforcement.It includes the excavation of underground continuous wall groove width；The installation of fabrication of reinforcing cage ancillary equipment；The production and decentralization and diaphram wall concreting of impervious core.For the present invention by using above-mentioned technology, steel reinforcement cage causes groove inside of continuous underground wall collapsing and progress diaphram wall reinforcement construction in the case where height-limited by transferring in production, to solve big machinery.It efficiently solves in the prior art, using lifting machines such as loop wheel machine, the crawler cranes of large-tonnage on slot width, greatly reduce the ground load on slot width both sides, reduce and is applied to the additional vertical and lateral pressure of groove inside of continuous underground wall surrounding soil body generation, and then phenomena such as ensure that the stabilization of cell wall, avoiding landslip of the sides of the trench, even if having barrier such as overpass, high-voltage line etc. on construction of diaphragm wall position top, also can normal construction, substantially increase its convenience for construction.
Description
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of flexible diaphram wall of steel strand wires as main reinforcement
Construction method.
Background technique
As the depth of deepening continuously for urban construction, land resource growing tension, underground space development continues to increase.Ground
Advantages the adding with foundation depth such as lower its rigidity of diaphragm wall (hereinafter referred to as diaphram wall) is big, good integrity, impermeability are strong
It is prominent greatly and more, almost become the only option of ultra-deep foundation pit.Currently, each big city all emerges in multitude ultra-deep foundation pit, such as
Hangzhou International Building (deep 28.5m), ground iron offical river station (deep 34.0m) etc. are calculated through statistics, and the underground of these ultra-deep foundation pits is continuous
Wall depth maximum can reach 60m, and weight, wherein being used for about 7 T of reinforcing bar of steel reinforcement cage integral hoisting, accounts for about overall weight up to 85 T
8%.And diaphram wall lifting at present needs 2 loop wheel machines, and it highly need to be 10m or more bigger than length of reinforcing cage, such as use the shoe of 360T
Band is hung, its own weight about 400T, and in the steel reinforcement cage of lifting, total weight about 480T, so big load action is on ground
Face certainly will generate additional vertical and lateral pressure to the groove inside of continuous underground wall surrounding soil body, and then influence the stabilization of cell wall, sternly
The meeting of weight causes landslip of the sides of the trench；Simultaneously as hoisting height need to than diaphram wall depth about 10m, this requires underground connect
Continuous wall construction part top clear, if there are the barrier of restricted clearance, such as overpass, high-voltage line, ground on foundation pit top
Lower construction of diaphragm wall technique is limited.
Summary of the invention
For the above-mentioned problems in the prior art, the purpose of the present invention is to provide a kind of steel strand wires as main reinforcement
Flexible construction method of underground continuous wall.
Flexible construction method of underground continuous wall of a kind of steel strand wires as main reinforcement, it is characterised in that including walking as follows
It is rapid:
1) continuous wall trench underground is carried out by design requirement first to construct to design slot bottom absolute altitude, obtain underground continuous wall groove width；
2) installation positioning and bearing support above underground continuous wall groove width, positioning and bearing support upper surface two sides are equipped with two groups
Corresponding symmetrical first pulley mechanism and second pulley mechanism, the first reinforcing bar positioning ring and the second reinforcing bar positioning ring, underground are continuous
One group of first reinforcing bar plate rail and horizontal hoop disk are placed on the left of wall chase width, place one group of second reinforcing bar on the right side of underground continuous wall groove width
Plate rail and horizontal lacing wire disk, the first reinforcing bar plate rail are equipped with the first steel strand wires disk, and the second reinforcing bar plate rail is equipped with the second steel strand wires
Disk, the end of the first vertical steel strand wires main reinforcement on the first steel strand wires disk is through first pulley mechanism and the first reinforcing bar positioning ring,
Position is distinguished after second pulley mechanism and the second reinforcing bar positioning ring in the end of the second vertical steel strand wires main reinforcement on two steel strand wires disks
It is spare below positioning and bearing support；3) construction personnel station is in positioning and bearing support two sides, by the first vertical steel strand wires master
Muscle, the second vertical steel strand wires main reinforcement are pulled down to required length, while pulling out the horizontal hoop on horizontal hoop disk and horizontal lacing wire
Horizontal lacing wire on disk, and need to cut corresponding length by design respectively, horizontal hoop, horizontal lacing wire are tied up by design spacing
It pricks in two groups of vertical steel strand wires main reinforcements, the impervious core being segmented；
4) impervious core for being banded step 3) is transferred into underground continuous wall groove width；
5) step 3) and step 4) are repeated, until the cage bottom of entire impervious core is transferred to the position of the design above 200mm of slot bottom
It sets, and vertical steel strand wires main reinforcement is locked in positioning and bearing support；
6) the first vertical steel strand wires main reinforcement, the second vertical steel strand wires main reinforcement are truncated, it is extra at disk steel strand wires to remove, and pours underground
Continuous wall concrete obtains flexible diaphram wall of the steel strand wires as main reinforcement.
Flexible construction method of underground continuous wall of a kind of steel strand wires as main reinforcement, it is characterised in that positioning and carrying
Bracket includes two groups of upright bars disposed in parallel, and the top of two groups of upright bars is equipped with fixed platform, first pulley mechanism, second pulley machine
Structure, the first reinforcing bar positioning ring and the second reinforcing bar positioning ring are arranged on the stationary platform, and reinforcing bar positioning ring is located at associated pulleys machine
The inside of structure.
Flexible construction method of underground continuous wall of a kind of steel strand wires as main reinforcement, it is characterised in that bottom of upright rod is set
There is pedestal.
A kind of flexible construction method of underground continuous wall of the steel strand wires as main reinforcement, it is characterised in that first pulley machine
Structure, the structure of second pulley mechanism are identical, respectively by fixing pulley support on the stationary platform and being mounted on pulley support
Pulley, two groups of vertical steel strand wires main reinforcements are spare after pulley and reinforcing bar positioning ring respectively.
Flexible construction method of underground continuous wall of a kind of steel strand wires as main reinforcement, it is characterised in that in step 6)
First vertical steel strand wires main reinforcement, the second vertical steel strand wires main reinforcement truncation position the first reinforcing bar positioning ring, the second reinforcing bar position
The top of ring.
The present invention carries out the construction of flexible diaphram wall by using above-mentioned technology, in the manufacturing process of steel reinforcement cage,
Using positioning and bearing support, carries out steel reinforcement cage and transferred in production, cause groove inside of continuous underground wall to collapse to solve big machinery
Collapse and in the case where height-limited carry out diaphram wall reinforcement construction.It efficiently solves in the prior art, is adopted on slot width
With lifting machines such as the loop wheel machine of large-tonnage, crawler cranes, greatly reduce the ground load on slot width both sides, reduces and be applied to underground company
The continuous wall chase wall surrounding soil body generates additional vertical and lateral pressure, and then ensure that the stabilization of cell wall, avoids landslip of the sides of the trench
Phenomena such as；Moreover, steel reinforcement cage of the invention does not have to integral hoisting, even if having barrier such as on construction of diaphragm wall position top
Overpass, high-voltage line etc., also can normal construction, substantially increase its convenience for construction.
Detailed description of the invention
Fig. 1 is work progress structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram after steel reinforcement cage decentralization；
Fig. 3 is positioning and bearing support enlarged structure schematic diagram.
In figure: 1- the first steel strand wires disk, 2- the first reinforcing bar plate rail, the vertical steel strand wires main reinforcement of 3- first, 4- horizontal hoop
Disk, 5- the first reinforcing bar positioning ring, 6- first pulley mechanism, 7- positioning and bearing support, 701- pedestal, 702- fixed platform,
703- upright bar, 8- second pulley mechanism, 9- horizontal hoop, the vertical steel strand wires main reinforcement of 10- second, the horizontal lacing wire disk of 11-, 12-
Two steel strand wires disks, 13- the second reinforcing bar plate rail, the ground 14-, 15- impervious core, 16- underground continuous wall groove width, 17- level are drawn
Muscle, 18- the second reinforcing bar positioning ring.
Specific embodiment
Below in conjunction with Figure of description, the invention will be further described, but protection scope of the present invention is not limited in
This:
As shown in Figure 1-3, a kind of flexible construction method of underground continuous wall of steel strand wires of the invention as main reinforcement, including walk as follows
It is rapid:
1) continuous wall trench underground is carried out by design requirement first to construct to design slot bottom absolute altitude, obtain underground continuous wall groove width
16；
2) installation positioning and bearing support 7 above underground continuous wall groove 16, as shown in figure 3, the positioning and bearing support 7
Including two groups of upright bars 703 disposed in parallel, the top of two groups of upright bars 703 is equipped with fixed platform 702, and 703 bottom of upright bar is equipped with bottom
Seat 701, positioning and 7 upper surface two sides of bearing support are equipped with two groups of accordingly symmetrical first pulley mechanism 6 and second pulley mechanisms
8, one group of first reinforcing bar plate rail 2 is placed in the first reinforcing bar positioning ring 5 and the second reinforcing bar positioning ring 18,16 left side of underground continuous wall groove
With horizontal hoop disk 4, one group of second reinforcing bar plate rail 13 and horizontal lacing wire disk 11, the first steel are placed in 16 right side of underground continuous wall groove
Muscle plate rail 2 is equipped with the first steel strand wires disk 1, and the second reinforcing bar plate rail 13 is equipped with the second steel strand wires disk 12, on the first steel strand wires disk 1
The first vertical steel strand wires main reinforcement 3 end through in first pulley mechanism 6 and the first reinforcing bar positioning ring 5, the second steel strand wires disk 12
The second vertical steel strand wires main reinforcement 10 end be located at after second pulley mechanism 8 and the second reinforcing bar positioning ring 18 positioning and
7 lower section of bearing support is spare, and wherein first pulley mechanism 6, second pulley mechanism 8, the first reinforcing bar positioning ring 5 and the second reinforcing bar are fixed
Position ring 18 is arranged in fixed platform 702, and reinforcing bar positioning ring is located at the inside of associated pulleys mechanism；
3) construction personnel station is in positioning and 7 two sides of bearing support, by the first vertical steel strand wires main reinforcement 3, the second vertical steel strand wires master
Muscle 10 is pulled down to required length, while pulling out the horizontal hoop 9 on horizontal hoop disk 4 and the horizontal lacing wire on horizontal lacing wire disk 11
17, and need to cut corresponding length by design respectively, by design spacing by horizontal hoop 9, the binding of horizontal lacing wire 17 at two groups
In vertical steel strand wires main reinforcement, the impervious core that is segmented；
4) impervious core for being banded step 3) is transferred into underground continuous wall groove 16；
5) step 3) and step 4) are repeated, until the cage bottom of entire impervious core 15 is transferred to the design above 200mm's of slot bottom
Position, and vertical steel strand wires main reinforcement is locked in positioning and bearing support 7；
6) the first vertical steel strand wires main reinforcement 3, the second vertical steel strand wires main reinforcement 10 are truncated, the first vertical steel strand wires main reinforcement 3, second
The truncation position of vertical steel strand wires main reinforcement 10 is in the top of the first reinforcing bar positioning ring 5, the second reinforcing bar positioning ring 18.
It is extra at disk steel strand wires to remove, and concrete placed under water method routinely pours diaphram wall concrete, obtains
Flexible diaphram wall to steel strand wires as main reinforcement.
As shown, first pulley mechanism 6 of the invention, the structure of second pulley mechanism 8 are identical, respectively by being fixed on
Pulley support on fixed platform 702 and the pulley being mounted on pulley support, two groups of vertical steel strand wires main reinforcements respectively through pulley and
It is spare after reinforcing bar positioning ring.
Claims (5)
1. a kind of flexible construction method of underground continuous wall of steel strand wires as main reinforcement, it is characterised in that include the following steps:
1) continuous wall trench underground is carried out in ground (14) by design requirement first to construct to design slot bottom absolute altitude, obtain underground company
Continuous wall chase width (16)；
2) installation positioning and bearing support (7) above underground continuous wall groove width (16), positioning and bearing support (7) upper surface two
Side is equipped with two groups of accordingly symmetrical first pulley mechanism (6) and second pulley mechanisms (8), the first reinforcing bar positioning ring (5) and second
One group of first reinforcing bar plate rail (2) and horizontal hoop disk (4) are placed in reinforcing bar positioning ring (18), underground continuous wall groove width (16) left side,
One group of second reinforcing bar plate rail (13) and horizontal lacing wire disk (11), the first reinforcing bar plate rail are placed on the right side of underground continuous wall groove width (16)
(2) it is equipped with the first steel strand wires disk (1), the second reinforcing bar plate rail (13) is equipped with the second steel strand wires disk (12), the first steel strand wires disk
(1) end of the first vertical steel strand wires main reinforcement (3) on is through first pulley mechanism (6) and the first reinforcing bar positioning ring (5), the second steel
The end of the second vertical steel strand wires main reinforcement (10) on tray (12) is through second pulley mechanism (8) and the second reinforcing bar positioning ring
(18) it is located at after spare below positioning and bearing support (7)；3) construction personnel stands in positioning and bearing support (7) two sides,
First vertical steel strand wires main reinforcement (3), the second vertical steel strand wires main reinforcement (10) are pulled down to required length, while pulling out horizontal hoop
The horizontal lacing wire (17) on horizontal hoop (9) and horizontal lacing wire disk (11) on disk (4), and need to cut accordingly by design respectively
Length, by design spacing by horizontal hoop (9), horizontal lacing wire (17) binding in two groups of vertical steel strand wires main reinforcements, divided
The impervious core of section；
4) impervious core for being banded step 3) is transferred into underground continuous wall groove width (16)；
5) step 3) and step 4) are repeated, until the cage bottom of entire impervious core (15) is transferred to the design above 200mm of slot bottom
Position, and vertical steel strand wires main reinforcement is locked in positioning and bearing support (7)；
6) the first vertical steel strand wires main reinforcement (3), the second vertical steel strand wires main reinforcement (10) are truncated, it is extra at disk steel strand wires to remove,
Diaphram wall concrete is poured, flexible diaphram wall of the steel strand wires as main reinforcement is obtained.
2. a kind of flexible construction method of underground continuous wall of the steel strand wires according to claim 1 as main reinforcement, feature exist
It include two groups of upright bars (703) disposed in parallel in positioning and bearing support (7), the top of two groups of upright bars (703) is equipped with fixed flat
Platform (702), first pulley mechanism (6), second pulley mechanism (8), the first reinforcing bar positioning ring (5) and the second reinforcing bar positioning ring (18)
It is arranged on fixed platform (702), and reinforcing bar positioning ring is located at the inside of associated pulleys mechanism.
3. a kind of flexible construction method of underground continuous wall of the steel strand wires according to claim 2 as main reinforcement, feature exist
Pedestal (701) are equipped in upright bar (703) bottom.
4. a kind of flexible construction method of underground continuous wall of the steel strand wires according to claim 2 as main reinforcement, feature exist
It is identical in the structure of first pulley mechanism (6), second pulley mechanism (8), the pulley by being fixed on fixed platform (702) respectively
Support and the pulley being mounted on pulley support, two groups of vertical steel strand wires main reinforcements are spare after pulley and reinforcing bar positioning ring respectively.
5. a kind of flexible construction method of underground continuous wall of the steel strand wires according to claim 1 as main reinforcement, feature exist
The truncation position of the first vertical steel strand wires main reinforcement (3), the second vertical steel strand wires main reinforcement (10) in step 6) is in the first reinforcing bar
The top of positioning ring (5), the second reinforcing bar positioning ring (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910362240.9A CN110206037A (en) | 2019-04-30 | 2019-04-30 | A kind of flexible construction method of underground continuous wall of steel strand wires as main reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910362240.9A CN110206037A (en) | 2019-04-30 | 2019-04-30 | A kind of flexible construction method of underground continuous wall of steel strand wires as main reinforcement |
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| Publication Number | Publication Date |
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| CN110206037A true CN110206037A (en) | 2019-09-06 |
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ID=67785416
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| CN201910362240.9A Pending CN110206037A (en) | 2019-04-30 | 2019-04-30 | A kind of flexible construction method of underground continuous wall of steel strand wires as main reinforcement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676976A (en) * | 2020-04-28 | 2020-09-18 | 中铁工程装备集团有限公司 | Construction method of limited space flexible skeleton structure |
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|---|---|---|---|---|
| CN101929249A (en) * | 2010-08-10 | 2010-12-29 | 中铁一局集团有限公司 | Double line stream-line type round end entity pier cap steel bar overall binding construction method |
| CN104141298A (en) * | 2013-12-24 | 2014-11-12 | 中国建筑第四工程局有限公司 | Manufacturing and mounting method and auxiliary mounting device for reinforcement cage in pile hole |
| CN104790405A (en) * | 2015-04-24 | 2015-07-22 | 山河建设集团有限公司 | Method for manually lowering overweight reinforcement cage of hole digging pile |
| CN107419747A (en) * | 2017-09-14 | 2017-12-01 | 上海岩土工程勘察设计研究院有限公司 | Can adaptive grooving deflection diaphram wall flexible steel twisted wire cage and its construction method |
| CN207047595U (en) * | 2017-06-14 | 2018-02-27 | 天津市春鹏预应力钢绞线有限公司 | A kind of prestress wire take-up |
| CN108466863A (en) * | 2018-04-10 | 2018-08-31 | 中冶建工集团有限公司 | A kind of solution bundle line-putting method of prestress wire |
-
2019
- 2019-04-30 CN CN201910362240.9A patent/CN110206037A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929249A (en) * | 2010-08-10 | 2010-12-29 | 中铁一局集团有限公司 | Double line stream-line type round end entity pier cap steel bar overall binding construction method |
| CN104141298A (en) * | 2013-12-24 | 2014-11-12 | 中国建筑第四工程局有限公司 | Manufacturing and mounting method and auxiliary mounting device for reinforcement cage in pile hole |
| CN104790405A (en) * | 2015-04-24 | 2015-07-22 | 山河建设集团有限公司 | Method for manually lowering overweight reinforcement cage of hole digging pile |
| CN207047595U (en) * | 2017-06-14 | 2018-02-27 | 天津市春鹏预应力钢绞线有限公司 | A kind of prestress wire take-up |
| CN107419747A (en) * | 2017-09-14 | 2017-12-01 | 上海岩土工程勘察设计研究院有限公司 | Can adaptive grooving deflection diaphram wall flexible steel twisted wire cage and its construction method |
| CN108466863A (en) * | 2018-04-10 | 2018-08-31 | 中冶建工集团有限公司 | A kind of solution bundle line-putting method of prestress wire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676976A (en) * | 2020-04-28 | 2020-09-18 | 中铁工程装备集团有限公司 | Construction method of limited space flexible skeleton structure |
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