CN103924595A - Self-float type inner formwork system for underwater pouring of hollow pipe column and application thereof - Google Patents

Self-float type inner formwork system for underwater pouring of hollow pipe column and application thereof Download PDF

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Publication number
CN103924595A
CN103924595A CN201410171790.XA CN201410171790A CN103924595A CN 103924595 A CN103924595 A CN 103924595A CN 201410171790 A CN201410171790 A CN 201410171790A CN 103924595 A CN103924595 A CN 103924595A
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China
Prior art keywords
template
formwork
formword
vertical column
positioning vertical
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Granted
Application number
CN201410171790.XA
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Chinese (zh)
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CN103924595B (en
Inventor
殷永高
章征
张立奎
朱福春
吕奖国
赵公明
郑伟峰
王凯
纪厚强
沈宜萍
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ANHUI HIGHWAY HOLDING GROUP Co Ltd
Anhui Expressway Holding Group Co Ltd
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ANHUI HIGHWAY HOLDING GROUP Co Ltd
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Priority to CN201410171790.XA priority Critical patent/CN103924595B/en
Publication of CN103924595A publication Critical patent/CN103924595A/en
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Publication of CN103924595B publication Critical patent/CN103924595B/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/06Placing concrete under water
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385Concrete 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

Abstract

The invention discloses a self-float type inner formwork system for underwater pouring of a hollow pipe column and application thereof. The self-float type inner formwork system for the underwater pouring of the hollow pipe column is characterized in that the inner formwork system arranged in a pipe column hole comprises a steel structure bottom section formwork, and the inner formwork system formed by all sections of prefabricated inner formworks is assembled from bottom to top on the bottom section formwork section by section. All sections of the prefabricated inner formworks are all-closed steel structure float bowls capable of obtaining buoyancy in water. The self-float type inner formwork system for the underwater pouring of the hollow pipe column and the application thereof can be effectively applied to construction of piles, immersed tubes, sunk wells and anchorages, cast-in-situ production of the piles, the immersed tubes, the sunk wells and the anchorages in the water can be achieved, the formworks can be recycled, and the construction efficiency and the material utilization rate are high.

Description

A kind of hollow pipe column underwater casting self-floating inner formwork system and application thereof
Technical field
The present invention relates to that civil engineering, bridge room are built, basic cast-in-place construction in hydro-structure.
Background technology
Existing open caisson and immersed tube foundation construction adopt the method that relies on deadweight or ancillary method heightening and sinking then to carry out mud jacking processing after segmentation prefabricating member to construct.For this technique, except existing, construction prefabricated component transport difficulty, hanging device are large, prefabricated component sinks the problems such as difficulty, also has following what time being difficult to control: after sinking because the easy integral inclination of residue is arranged at bottom; Segmentation prefabricating, respectively saves interface concatenation construction difficulty large; Mud jacking complex process, 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 for avoiding the existing weak point of above-mentioned prior art, and a kind of hollow pipe column underwater casting self-floating inner formwork system and application thereof are provided, and to realize the cast-in-place construction on basis in land and water, thereby convenient construction, improves 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 being arranged in tubing string hole comprises: a steel work coxopodite template, in described coxopodite template, assemble section by section each precast segment inner formword from bottom to top; 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 back cover in tubing string hole and positions; Described each precast segment inner formword is to be formed by tile template assembly; In described each precast segment inner formword, be horizontally disposed " ten " word bracing frame and be supported with positioning vertical column on it is four support levels of " ten " word, the mutual inlay card of positioning vertical column on each tile template and adjacent position, and can vertically slide taking described positioning vertical column as lead; Between the prefabricated inner formword of adjacent segment, the positioning vertical column on correspondence position is threaded mutually; Be in adjacent locational the first precast segment inner formword of described coxopodite template in positioning vertical column be to be threaded on the end face of described coxopodite template, between described each precast segment inner formword, run through the locking steel hinge line for stretch-draw; 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 back cover to be cast in tubing string hole at the bottom of its conical tube.
The center of Ge road " ten " word bracing frame is respectively arranged with steel strand and fastens node, and has the steel strand of recovery to fasten the aperture that is connected in series and extends to tubing string hole between node at each steel strand, 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 to carry 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, while being in position, aperture to the top of coxopodite template, at the end face of coxopodite template, positioning vertical column and " ten " word bracing frame in the first sections prefab form is installed; Again transfer to the top end of the positioning vertical column in the first sections prefab form when the position, aperture, with the positioning vertical column and " ten " word bracing frame that are threaded in a upper precast segment template; Continue to transfer positioning vertical column and " ten " word bracing frame in the pre-inner formword of each sections, until coxopodite template reaches pore-forming bottom desired location, build the circular cylinder that bottom concrete is fixed coxopodite template and formed back cover;
C, utilize plug-in counterweight by each tile template in each precast segment template from aperture place successively along sinking on assigned address under positioning vertical column, the locking steel strand that utilize jack tension to be applied in each precast segment inner formword on the limiting platform of top, hole carry out compacting locking, complete internal mold and install;
D, taking the outer wall soil body of pore-forming as external mold, between external mold and internal mold, carry out pipe shaft concreting; In the time that pipe shaft concrete reaches intensity, take out plug-in counterweight, discharge the locking of locking steel strand, take out section by section positioning vertical column and " ten " bracing frame, 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, utilize annular sliding form apparatus to build and form retaining wall layer with fast gel material under water along pore-forming inwall in pore-forming from bottom to top, and taking described retaining wall layer as external mold.
Compared with the prior art, the useful technique effect of the present invention is embodied in:
1, the cast in place process that realizes underwater foundation construction with the present invention, its technique simply, has greatly improved 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 complete entirety, 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 control.
3, the construction method of traditional prefabricated sinking needs to carry out mud jacking processing after prefabricated component has sunk, mud jacking complex process, particularly be quite difficult to control for cylinder pile foundation bottom squeezing quality, cause foundation bottom periphery loose, foundation bearing capacity is reduced, and the present invention realizes disposable cast-in-place, does not need mud jacking processing, its steel work coxopodite template can extend darker position, 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 will, effectively to prevent the longitudinal and hoop strain of concreting, ensure basic quality.
6, virtue of buoyancy of the present invention carries out the recovery of prefabricated inner formword, can realize completely unmanned lower hole operation, the safety that has improved work progress.
Brief description of the drawings
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, 10 steel strand are fastened node, 11 concrete back covers, 12 recovery steel strand, 13 through wires holes.
Detailed description of the invention
Referring to 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 being arranged in tubing string hole comprises steel work coxopodite template 4, in coxopodite template 4, assemble section by section each precast segment inner formword 3 from bottom to top; Each precast segment inner formword 3 for obtaining the totally-enclosed steel structure pontoon of buoyancy in water.
As shown in Figure 1, coxopodite template 4 is cast in the concrete back cover 11 in tubing string hole and positions.
As shown in Figure 2 and Figure 5, each precast segment inner formword 3 is to be formed by tile template assembly; In each precast segment inner formword 3, be horizontally disposed " ten " word bracing frame 5 and be supported with positioning vertical column 6 on it is four support levels of " ten " word, the mutual inlay card of positioning vertical column 6 on each tile template and adjacent position, and can vertically slide taking positioning vertical column 6 as lead; 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; Be in adjacent locational the first precast segment inner formword of coxopodite template 4 in positioning vertical column be to 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 being arranged in prefabricated inner formword 3; Locking steel hinge line 7 utilizes jack 9 to carry out stretch-draw on top, hole limiting platform 8.
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 back cover 11 to be cast in tubing string hole at the bottom of its conical tube;
As shown in Figure 6, " ten " word bracing frame 5 arranges according to stressing conditions, every joint positioning vertical column 6 at least arranges twice " ten " word bracing frame 5, the center of Ge road " ten " word bracing frame 5 is respectively arranged with steel strand and fastens node 10, and have to reclaim and fasten and between node 10, be connected in series and extend to aperture at each steel strand with steel strand 12, for reclaiming " ten " word bracing frame 5, on the inside wall of positioning vertical column 6, arrange and support bracket 6a, " ten " word bracing frame 5 is connected to and is supported bracket 6a by cone pin 5a.
The construction method that realizes hollow pipe column underwater casting with the present embodiment hollow core tubing string underwater casting self-floating inner formwork system is to carry out according to the following procedure:
1, reinforcing cage 2, after desired location pore-forming, is transferred in tubing string hole 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, while being in position, aperture to the top of coxopodite template 4, at the end face of coxopodite template 4, positioning vertical column and " ten " word bracing frame in the first sections prefab form is installed; Again transfer to the top end of the positioning vertical column in the first sections prefab form when the position, aperture, with the positioning vertical column and " ten " word bracing frame that are threaded in a upper precast segment template; Continue to transfer positioning vertical column and " ten " word bracing frame in the pre-inner formword of each sections, until coxopodite template 4 reaches pore-forming bottom desired location, build the circular cylinder that bottom concrete is fixed coxopodite template 4 and formed back cover;
3, utilize plug-in counterweight that each tile template in each precast segment template is sunk on assigned address for 6 times along positioning vertical column successively from aperture place, on top, hole limiting platform 8, utilize jack 9 stretch-draw to be applied in each precast segment inner formword 3 locking steel strand 7 and carry out compacting locking, complete internal mold and install;
4, taking the outer wall soil body of pore-forming as external mold, between external mold and internal mold, carry out pipe shaft concreting; In the time that pipe shaft concrete reaches intensity, take out plug-in counterweight, discharge the locking of locking steel strand 7, take out section by section positioning vertical column and " ten " bracing frame, virtue of buoyancy reclaims each precast segment inner formword section by section, completes construction.
In concrete enforcement, can also be after pore-forming and before transferring reinforcing cage, utilize annular sliding form apparatus to build and be formed with retaining wall layer 1 (as shown in Figure 1) with fast gel material under water along pore-forming inwall in pore-forming from bottom to top, and be taking retaining wall layer 1 as external mold while building pipe shaft.This retaining wall layer has higher intensity mass ratio, rigidity mass ratio and good decay resistance, and barrier performance is good, can implement life-cycle protection to concrete structure using its protecting sheathing as concrete pipe shaft; Moreover, retaining wall layer can retrain the longitudinal and 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, has also alleviated 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 mixes, can highly wait actual condition 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 to build the strength of materials at initial position to reach after permissible value, 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 to 6m, can be widely used in the engineering construction fields such as bridge room is built, hydro-structure 3, and application scenario comprises: the construction on land conventional basis, as open caisson etc.; The construction on basis in water, as Anchor Foundation, group wells basis etc. in the king-post basis of bridge, water.

Claims (6)

1. a hollow pipe column underwater casting self-floating inner formwork system, it is characterized in that: the inner formwork system being arranged in tubing string hole comprises: a steel work coxopodite template (4), assemble section by section each precast segment inner formword (3) above, from bottom to top in described coxopodite template (4); Described each precast segment inner formword (3) for obtaining the totally-enclosed steel structure pontoon of buoyancy in water.
2. hollow pipe column underwater casting self-floating inner formwork system according to claim 1, is characterized in that: described coxopodite template (4) is cast in the concrete back cover (11) in tubing string hole and positions; Described each precast segment inner formword (3) is to be formed by tile template assembly; In described each precast segment inner formword (3), be horizontally disposed " ten " word bracing frames (5) and be supported with positioning vertical column (6) on it is four support levels of " ten " word, positioning vertical column (6) inlay card mutually on each tile template and adjacent position, and can vertically slide taking described positioning vertical column (6) as lead; Between the prefabricated inner formword (3) of adjacent segment, the positioning vertical column (6) on correspondence position is threaded mutually; Be in adjacent locational the first precast segment inner formword of described coxopodite template (4) in positioning vertical column be to be threaded on the end face of described coxopodite template (4), between described each precast segment inner formword (3), run through the locking steel hinge line (7) for stretch-draw; Described locking steel hinge line (7) utilizes jack (9) to carry out stretch-draw on top, hole limiting platform (8).
3. hollow pipe column underwater casting self-floating inner formwork system according to claim 2, 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 back cover (11) to be cast in tubing string hole at the bottom of its conical tube.
4. hollow pipe column underwater casting self-floating inner formwork system according to claim 2, it is characterized in that: the center of Ge road " ten " word bracing frame (5) is respectively arranged with steel strand and fastens node (10), and have recovery to fasten the aperture that is connected in series and extends to tubing string hole between node (10) at each steel strand with steel strand (12), for reclaiming " ten " word bracing frame (5).
5. utilize hollow pipe column underwater casting self-floating inner formwork system described in claim 2,3 or 4 to realize the construction method of hollow pipe column underwater casting, it is characterized in that carrying out according to the following procedure:
Reinforcing cage (2), after desired location pore-forming, is transferred in a, tubing string hole in pore-forming, makes the bottom of reinforcing cage (2) reach position at the bottom of the hole in tubing string hole;
B, in pore-forming, transfer coxopodite template (4), while being in position, aperture to the top of coxopodite template (4), at the end face of coxopodite template (4), positioning vertical column and " ten " word bracing frame in the first sections prefab form is installed; Again transfer to the top end of the positioning vertical column in the first sections prefab form when the position, aperture, with the positioning vertical column and " ten " word bracing frame that are threaded in a upper precast segment template; Continue to transfer positioning vertical column and " ten " word bracing frame in the pre-inner formword of each sections, until coxopodite template (4) reaches pore-forming bottom desired location, build the circular cylinder that bottom concrete is fixed coxopodite template (4) and formed back cover;
C, utilize plug-in counterweight by each tile template in each precast segment template from aperture place successively along sinking on assigned address under positioning vertical column (6), the locking steel strand (7) that utilize jack (9) stretch-draw to be applied in each precast segment inner formword on top, hole limiting platform (8) carry out compacting locking, complete internal mold and install;
D, taking the outer wall soil body of pore-forming as external mold, between external mold and internal mold, carry out pipe shaft concreting; In the time that pipe shaft concrete reaches intensity, take out plug-in counterweight, discharge the locking of locking steel strand (7), take out section by section positioning vertical column and " ten " bracing frame, virtue of buoyancy reclaims each precast segment inner formword section by section, completes construction.
6. construction method according to claim 5, it is characterized in that: after pore-forming and transferring reinforcing cage (2) before, utilize annular sliding form apparatus to build and form retaining wall layer (1) with fast gel material under water along pore-forming inwall in pore-forming from bottom to top, and taking described retaining wall layer (1) as external mold.
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KR100914650B1 (en) * 2009-06-02 2009-08-28 우경건설 주식회사 The well foundation method for which a steel caisson for pier reinforcement was used
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Publication number Priority date Publication date Assignee Title
CN104405123A (en) * 2014-12-03 2015-03-11 广西建工集团第二建筑工程有限责任公司 Mold subassembly for casting thin-wall rectangular small-section reinforced concrete hollow column in situ and construction method thereof

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CN103924595B (en) 2016-01-20
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