CN103924595B - A kind of hollow pipe column underwater casting self-floating inner formwork system - Google Patents
A kind of hollow pipe column underwater casting self-floating inner formwork system Download PDFInfo
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- CN103924595B CN103924595B CN201410171790.XA CN201410171790A CN103924595B CN 103924595 B CN103924595 B CN 103924595B CN 201410171790 A CN201410171790 A CN 201410171790A CN 103924595 B CN103924595 B CN 103924595B
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- formwork system
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- inner formword
- vertical column
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- 238000009415 formwork Methods 0.000 title claims abstract description 21
- 238000005266 casting Methods 0.000 title claims abstract description 16
- 238000007667 floating Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004567 concrete Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 25
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003466 welding Methods 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
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a kind of hollow pipe column underwater casting self-floating inner formwork system and application thereof, it is characterized in that the inner formwork system be arranged in tubing string hole comprises a steel work coxopodite template, in coxopodite template, from bottom to top, assemble each precast segment inner formword formation inner formwork system section by section; Each precast segment inner formword is the totally-enclosed steel structure pontoon that can obtain buoyancy in water.The present invention effectively can be applied to the construction of stake, immersed tube, open caisson and anchorage, and realizes the cast-in-place production of water king-pile, immersed tube, open caisson and anchorage, and template is recyclable, efficiency of construction and stock utilization high.
Description
Technical field
The present invention relates to civil engineering, bridge room built, basic cast-in-place construction in hydro-structure.
Background technology
The method relying on deadweight or ancillary method heightening and sinking then to carry out Dispose by grouting after existing open caisson and foundation for laid pipe construction adopt segmentation prefabricating component is constructed.For this technique, except existence is constructed except the problems such as field prefabricated component transport difficult, hanging device is large, prefabricated component sinking is difficult, what time be difficult to below also having control: because bottom has residue easily integral inclined after sinking; Segmentation prefabricating, each joint interface concatenation construction difficulty is large; Mud-jacking technology is complicated, and squeezing quality is difficult to control, and cost long in time limit is high.The above problem of prefabrication construction has become a difficult problem recognized within the industry.
Summary of the invention
The present invention is the weak point for avoiding existing for above-mentioned prior art, provides a kind of hollow pipe column underwater casting self-floating inner formwork system and application thereof, to realize land and cast-in-place construction that is foundation in water, thus convenient construction, raising efficiency of construction.
The present invention is that technical solution problem adopts following technical scheme:
The design feature of hollow pipe column underwater casting self-floating inner formwork system of the present invention is: the inner formwork system be arranged in tubing string hole comprises: a steel work coxopodite template, in described coxopodite template, from bottom to top, assemble each precast segment inner formword section by section; Described each precast segment inner formword is the totally-enclosed steel structure pontoon that can obtain buoyancy in water.
The design feature of hollow pipe column underwater casting self-floating inner formwork system of the present invention is also:
Described coxopodite template is cast in the concrete sealing bottom in tubing string hole and positions; Described each precast segment inner formword is formed by tile template assembly; In described each precast segment inner formword, in its four support levels in " ten " word, positioning vertical column is supported with in horizontally disposed " ten " word bracing frame, the mutual inlay card of positioning vertical column on each tile template and adjacent position, and can with described positioning vertical column for lead vertically slides; Between the prefabricated inner formword of adjacent segment, the positioning vertical column on correspondence position is threaded mutually; Being in the positioning vertical column in the first precast segment inner formword on the described adjacent position of coxopodite template is be threaded on the end face of described coxopodite template, runs through the locking steel hinge line for stretch-draw between described each precast segment inner formword; Described locking steel hinge line utilizes jack to carry out stretch-draw on the limiting platform of top, hole.
The epimere of described coxopodite template is cylindrical tube, and hypomere is divergent-cone wall, and described coxopodite template is to position in the concrete sealing bottom being cast in tubing string hole at the bottom of its conical tube.
Be respectively arranged with steel strand at the center of each road " ten " word bracing frame and fasten node, and have and reclaim steel strand and fasten at each steel strand and to be connected in series between node and to extend to the aperture in tubing string hole, for reclaiming " ten " word bracing frame.
The feature that the present invention utilizes described hollow pipe column underwater casting self-floating inner formwork system to realize the construction method of hollow pipe column underwater casting is carried out according to the following procedure:
Reinforcing cage, after desired location pore-forming, is transferred in a, tubing string hole in pore-forming, makes the bottom of reinforcing cage reach position at the bottom of the hole in tubing string hole;
B, in pore-forming, transfer coxopodite template, when the top to coxopodite template is in orifice position, at the end face of coxopodite template, positioning vertical column in the first sections prefab form and " ten " word bracing frame are installed; Again transfer top end to the positioning vertical column in the first sections prefab form when orifice position, with the positioning vertical column be threaded in a upper precast segment template and " ten " word bracing frame; Continue to transfer positioning vertical column and " ten " word bracing frame in the pre-inner formword of each sections, until coxopodite template reaches desired location bottom pore-forming, build bottom concrete and fix coxopodite template and the circular cylinder forming back cover;
C, plug-in counterweight is utilized to sink on assigned address under positioning vertical column by tile template each in each precast segment template successively from aperture place, the locking steel strand that top, hole limiting platform utilizes jack tension to be applied in each precast segment inner formword carry out compacting and lock, and complete internal mold and install;
D, with the outer wall soil body of pore-forming for external mold, between external mold and internal mold, carry out pipe shaft concreting; When pipe shaft concrete reaches intensity, take out the locking of plug-in counterweight, release locking steel strand, take out positioning vertical column and " ten " bracing frame section by section, virtue of buoyancy reclaims each precast segment inner formword section by section, completes construction.
The feature of construction method of the present invention is also: after pore-forming and before transferring reinforcing cage, utilizes annular sliding form apparatus to carry out building with fast gel material under water along pore-forming inwall in pore-forming and form retaining wall layer from bottom to top, and with described retaining wall layer for external mold.
Compared with the prior art, Advantageous Effects of the present invention is embodied in:
1, realize the cast in place process of underwater foundation construction with the present invention, its technique is simple, drastically increase work efficiency.Compared with the cylinder pile foundation construction method of the prefabricated sinking of routine, the present invention does not need that large-scale place is prefabricated, transport member, the complicated procedures of forming of saving main equipment lifting and transferring.
2, the present invention realizes cylinder pile foundation primary concreting and completes, and basis is whole, can effectively improve fundamental mechanics performance, utilizes the present invention to realize the underwater casting of hollow pipe column, its system easy to control the quality.And the prefabricated construction method of tradition needs prefabricated component to connect height, junction difficult treatment, difficult quality controls.
3, the construction method of traditional prefabricated sinking needs to carry out Dispose by grouting after prefabricated component has sunk, mud-jacking technology is complicated, particularly squeezing quality bottom cylinder pile foundation is quite difficult to control, cause foundation bottom periphery loose, foundation bearing capacity is reduced, and the present invention realizes disposable cast-in-place, does not need Dispose by grouting, its steel work coxopodite template can extend comparatively deep location place, completes after building and can avoid the loose problem of bottom periphery.
4, the present invention's welding between each sections inner formword, facilitates installation and removal, can reuse, and effectively improves efficiency of construction and saves cost.
5, in the present invention, the setting of " ten " word bracing frame effectively to prevent longitudinal direction and the hoop strain of concreting, will ensure the quality on basis.
6, virtue of buoyancy of the present invention carries out the recovery of prefabricated inner formword, can realize completely unmanned lower hole operation, improve the safety of work progress.
Accompanying drawing explanation
Fig. 1 is self-floating inner formwork system elevation of the present invention;
Fig. 2 is self-floating inner formwork system plan view of the present invention;
Fig. 3 is coxopodite locating template scheme of installation in the present invention;
Fig. 4 is second section column and cross supporting frame scheme of installation in the present invention;
Fig. 5 is from floating template and positioning vertical column connection diagram in the present invention;
Fig. 6 is cross supporting frame and positioning vertical column connection diagram in the present invention.
Number in the figure: 1 retaining wall layer, 2 reinforcing cages, 3 inner formwords, 3a stiffener, 4 coxopodite templates, 5 is " ten " word bracing frame, 5a cone pin, 6 positioning vertical columns, 6a supports bracket, 7 locking steel hinge lines, 8 top, hole limiting platforms, 9 jack, node fastened by 10 steel strand, 11 concrete sealing bottom, 12 recovery steel strand, 13 through wires holes.
Detailed description of the invention
See Fig. 1, the form of structure of the present embodiment hollow core tubing string underwater casting self-floating inner formwork system is: the inner formwork system be arranged in tubing string hole comprises steel work coxopodite template 4, in coxopodite template 4, from bottom to top, assemble each precast segment inner formword 3 section by section; Each precast segment inner formword 3 is the totally-enclosed steel structure pontoon that can obtain buoyancy in water.
As shown in Figure 1, coxopodite template 4 is cast in the concrete sealing bottom 11 in tubing string hole and positions.
As shown in Figure 2 and Figure 5, each precast segment inner formword 3 is formed by tile template assembly; In each precast segment inner formword 3, in its four support levels in " ten " word, positioning vertical column 6 is supported with in horizontally disposed " ten " word bracing frame 5, positioning vertical column 6 inlay card mutually on each tile template and adjacent position, and vertically can slide for lead with positioning vertical column 6; Each tile template is hollow totally-enclosed floating template, is provided with each road stiffener 3a in it; Each precast segment inner formword 3 can 6-15m according to practice of construction condition.
As shown in Fig. 3, Fig. 4 and Fig. 5, between the prefabricated inner formword 3 of adjacent segment, the positioning vertical column 6 on correspondence position is threaded mutually; Being in the positioning vertical column in the first precast segment inner formword on the adjacent position of coxopodite template 4 is be threaded on the end face of coxopodite template 4, between each precast segment inner formword 3, run through the locking steel hinge line 7 for stretch-draw by the through wires hole 13 be arranged in prefabricated inner formword 3; Locking steel hinge line 7 utilizes jack 9 to carry out stretch-draw on the limiting platform 8 of top, hole.
In concrete enforcement, the epimere of coxopodite template 4 is cylindrical tube, and hypomere is divergent-cone wall, and coxopodite template 4 is to position in the concrete sealing bottom 11 being cast in tubing string hole at the bottom of its conical tube;
As shown in Figure 6, " ten " word bracing frame 5 is arranged according to stressing conditions, often save positioning vertical column 6 and twice " ten " word bracing frame 5 is at least set, be respectively arranged with steel strand at the center of each road " ten " word bracing frame 5 and fasten node 10, and have recovery steel strand 12 to fasten at each steel strand to be connected in series between node 10 and to extend to aperture, for reclaiming " ten " word bracing frame 5, the inside wall of positioning vertical column 6 is arranged and supports bracket 6a, " ten " word bracing frame 5 is connected to by cone pin 5a and supports bracket 6a.
The construction method realizing hollow pipe column underwater casting with the present embodiment hollow core tubing string underwater casting self-floating inner formwork system is carried out according to the following procedure:
1, tubing string hole is after desired location pore-forming, transfers reinforcing cage 2 in pore-forming, makes the bottom of reinforcing cage 2 reach position at the bottom of hole;
2, in pore-forming, transfer coxopodite template 4, when the top to coxopodite template 4 is in orifice position, at the end face of coxopodite template 4, positioning vertical column in first sections prefab form and " ten " word bracing frame are installed; Again transfer top end to the positioning vertical column in the first sections prefab form when orifice position, with the positioning vertical column be threaded in a upper precast segment template and " ten " word bracing frame; Continue to transfer positioning vertical column and " ten " word bracing frame in the pre-inner formword of each sections, until coxopodite template 4 reaches desired location bottom pore-forming, build bottom concrete and fix coxopodite template 4 and the circular cylinder forming back cover;
3, plug-in counterweight is utilized to sink on assigned address 6 times along positioning vertical column by tile template each in each precast segment template successively from aperture place, the locking steel strand 7 that top, hole limiting platform 8 utilizes jack 9 stretch-draw to be applied in each precast segment inner formword 3 carry out compacting and lock, and complete internal mold and install;
4, with the outer wall soil body of pore-forming for external mold, between external mold and internal mold, carry out pipe shaft concreting; When pipe shaft concrete reaches intensity, take out the locking of plug-in counterweight, release locking steel strand 7, take out positioning vertical column and " ten " bracing frame section by section, virtue of buoyancy reclaims each precast segment inner formword section by section, completes construction.
In concrete enforcement, can also after pore-forming and before transferring reinforcing cage, utilize annular sliding form apparatus to carry out building with fast gel material under water along pore-forming inwall in pore-forming and be formed with retaining wall layer 1 (as shown in Figure 1) from bottom to top, and be for external mold with retaining wall layer 1 when building pipe shaft.This retaining wall layer has higher Strength Mass ratio, rigidity mass ratio and good decay resistance, and barrier performance is good, can implement life-cycle protection using it as the protecting sheathing of concrete pipe body to concrete structure; Moreover, retaining wall layer can retrain longitudinal direction and the hoop strain of tubing string preferably, and reinforcing cage can configure according to minimum steel ratio, greatly reduces with ordinary reinforced concrete immersed tube reinforcement ratio, also mitigates the lifting weight of reinforcing cage.
In concrete enforcement, under water fast gel material be with cement, gypsum, HPMC material and water by 1: 1: 0.01: 0.5 quality mixture ratio mix, actual condition highly can be waited suitably to adjust according to building, fast gel material setting time is 1 hour, intensity is 2MPa, and the thickness of building the retaining wall layer 1 of formation is 5 to 20cm.
The casting process of annular sliding form apparatus is built after the strength of materials reaches permissible value at initial position, mobile traveling formwork to the next position continues to build, realize continuous placing, sliding traveling formwork in annular sliding form apparatus is annular, and this construction technology is used widely at present in engineering construction.
Tubing string diameter of the present invention is at 3 to 6m, and can be widely used in the engineering construction fields such as bridge room is built, hydro-structure, application scenario comprises: the construction of land conventional base, as open caisson etc.; The construction of foundation in water, as the king-post basis of bridge, Anchor Foundation, group wells basis etc. in water.
Claims (3)
1. a hollow pipe column underwater casting self-floating inner formwork system, it is characterized in that: the inner formwork system be arranged in tubing string hole comprises: a steel work coxopodite template (4), on described coxopodite template (4), assemble each precast segment inner formword (3) section by section from bottom to top; Described each precast segment inner formword (3) is the totally-enclosed steel structure pontoon that can obtain buoyancy in water; Described coxopodite template (4) is cast in the concrete sealing bottom (11) in tubing string hole and positions; Described each precast segment inner formword (3) is formed by tile template assembly; In described each precast segment inner formword (3), in its four support levels in " ten " word, positioning vertical column (6) is supported with in horizontally disposed " ten " word bracing frame (5), positioning vertical column (6) inlay card mutually on each tile template and adjacent position, and can with described positioning vertical column (6) for lead vertically slides; Between the prefabricated inner formword (3) of adjacent segment, the positioning vertical column (6) on correspondence position is threaded mutually; Being in the positioning vertical column in the first precast segment inner formword on the adjacent position of described coxopodite template (4) is be threaded on the end face of described coxopodite template (4), runs through the locking steel hinge line (7) for stretch-draw between described each precast segment inner formword (3); Described locking steel hinge line (7) utilizes jack (9) to carry out stretch-draw on top limiting platform, hole (8).
2. hollow pipe column underwater casting self-floating inner formwork system according to claim 1, it is characterized in that: the epimere of described coxopodite template (4) is cylindrical tube, hypomere is divergent-cone wall, and described coxopodite template (4) is to position in the concrete sealing bottom (11) being cast in tubing string hole at the bottom of its conical tube.
3. hollow pipe column underwater casting self-floating inner formwork system according to claim 1, it is characterized in that: be respectively arranged with steel strand at the center of each road " ten " word bracing frame (5) and fasten node (10), and have recovery steel strand (12) to fasten at each steel strand to be connected in series between node (10) and to extend to the aperture in tubing string hole, for reclaiming " ten " word bracing frame (5).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171790.XA CN103924595B (en) | 2014-04-25 | 2014-04-25 | A kind of hollow pipe column underwater casting self-floating inner formwork system |
| CN201511029833.1A CN105544548B (en) | 2014-04-25 | 2014-04-25 | A kind of hollow pipe column underwater casting construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171790.XA CN103924595B (en) | 2014-04-25 | 2014-04-25 | A kind of hollow pipe column underwater casting self-floating inner formwork system |
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| CN201511029833.1A Division CN105544548B (en) | 2014-04-25 | 2014-04-25 | A kind of hollow pipe column underwater casting construction method |
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| Publication Number | Publication Date |
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| CN103924595A CN103924595A (en) | 2014-07-16 |
| CN103924595B true CN103924595B (en) | 2016-01-20 |
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| CN201410171790.XA Active CN103924595B (en) | 2014-04-25 | 2014-04-25 | A kind of hollow pipe column underwater casting self-floating inner formwork system |
| CN201511029833.1A Active CN105544548B (en) | 2014-04-25 | 2014-04-25 | A kind of hollow pipe column underwater casting construction method |
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| CN104405123B (en) * | 2014-12-03 | 2016-08-24 | 广西建工集团第二建筑工程有限责任公司 | Cast-in-situ reinforced concrete thin-wall rectangular small bore open tubular column template assembly and construction method thereof |
| CN108118611B (en) * | 2018-01-23 | 2023-10-17 | 安徽省交通控股集团有限公司 | Prefabricated mound, board cylindric shear force prop connection structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113529A (en) * | 1995-04-04 | 1995-12-20 | 冯毅 | Construction technology of underwater cast in-situ with steel formwork |
| KR100914650B1 (en) * | 2009-06-02 | 2009-08-28 | 우경건설 주식회사 | Construction method of well bucket using steel caisson for bridge reinforcement |
| CN101701461A (en) * | 2009-10-29 | 2010-05-05 | 上海广联建设发展有限公司 | Method for constructing energy-saving underground tube structure |
| CN102359110A (en) * | 2011-08-03 | 2012-02-22 | 安徽省高速公路控股集团有限公司 | Modular cast-in-place construction method for large-diameter root foundation |
| CN203782715U (en) * | 2014-04-25 | 2014-08-20 | 安徽省高速公路控股集团有限公司 | Self-floating type inner mold system for under water pouring of hollow pipe column |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB749979A (en) * | 1954-09-27 | 1956-06-06 | Guy Anson Maunsell | Improved pile anchorage of submerged structures |
| DD200477A1 (en) * | 1981-07-31 | 1983-05-04 | Gerloff Klaus Dipl Ing | DEVICE FOR INTRODUCING UNDERWATER CONCRETE |
| CN101942833B (en) * | 2010-09-30 | 2012-05-09 | 建研地基基础工程有限责任公司 | Frameless unbonded post-tensioned prestressed uplift filling pile and construction method thereof |
| CN102995642B (en) * | 2012-12-26 | 2014-11-12 | 广西建工集团第三建筑工程有限责任公司 | Underwater concrete spouting laitance prevention water-proof device |
| CN203256748U (en) * | 2013-03-04 | 2013-10-30 | 中国建筑西北设计研究院有限公司 | Pre-stressed concrete pipe/square pile grouting device |
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2014
- 2014-04-25 CN CN201410171790.XA patent/CN103924595B/en active Active
- 2014-04-25 CN CN201511029833.1A patent/CN105544548B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113529A (en) * | 1995-04-04 | 1995-12-20 | 冯毅 | Construction technology of underwater cast in-situ with steel formwork |
| KR100914650B1 (en) * | 2009-06-02 | 2009-08-28 | 우경건설 주식회사 | Construction method of well bucket using steel caisson for bridge reinforcement |
| CN101701461A (en) * | 2009-10-29 | 2010-05-05 | 上海广联建设发展有限公司 | Method for constructing energy-saving underground tube structure |
| CN102359110A (en) * | 2011-08-03 | 2012-02-22 | 安徽省高速公路控股集团有限公司 | Modular cast-in-place construction method for large-diameter root foundation |
| CN203782715U (en) * | 2014-04-25 | 2014-08-20 | 安徽省高速公路控股集团有限公司 | Self-floating type inner mold system for under water pouring of hollow pipe column |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105544548B (en) | 2017-06-16 |
| CN103924595A (en) | 2014-07-16 |
| CN105544548A (en) | 2016-05-04 |
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