CN103911990B - A kind of underwater casting formula tubing string with retaining wall and construction method thereof - Google Patents
A kind of underwater casting formula tubing string with retaining wall and construction method thereof Download PDFInfo
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- CN103911990B CN103911990B CN201410172024.5A CN201410172024A CN103911990B CN 103911990 B CN103911990 B CN 103911990B CN 201410172024 A CN201410172024 A CN 201410172024A CN 103911990 B CN103911990 B CN 103911990B
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Abstract
The invention discloses a kind of underwater casting formula tubing string with retaining wall and construction method thereof, to it is characterized in that in pore-forming building retaining wall layer along pore-forming inwall with fast gel material under water from bottom to top forms retaining wall hole, transfers tubular reinforcing cage in retaining wall hole; In the cylinder of reinforcing cage, transfer steel work taper coxopodite template, and assemble section by section from bottom to top and transfer each precast segment inner formword formation internal mold; In retaining wall hole, build bottom concrete form concrete floor, make into the circular cylinder that retaining wall hole shape becomes back cover; In the circular cylinder of back cover, with retaining wall layer for external mold, between external mold and internal mold, carry out that pipe shaft is concrete builds, after pipe shaft concrete reaches requirement of strength, take out each precast segment inner formword from top to bottom, complete the construction of the underwater casting formula tubing string with retaining wall.The present invention effectively can be applied to civil engineering, bridge room is built, hydro-structure, and improves efficiency of construction.
Description
Technical field
The present invention relates to civil engineering, bridge room built, basic cast-in-situ construction method 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 underwater casting formula tubing string with retaining wall and construction method thereof, with convenient construction, improves efficiency of construction.
The present invention is that technical solution problem adopts following technical scheme:
The present invention with the design feature of the underwater casting formula tubing string of retaining wall is: described tubing string between cast-in-place reinforced-concrete tubing string and pore-forming inwall, adopts fast gel material under water to build be formed with retaining wall layer, and described tubing string forms concrete sealing bottom with cast-in-situ concrete base plate.
The present invention is carry out as follows with the feature of the construction method of the underwater casting formula tubing string of retaining wall:
A, the tubing string position place set, with drilling machine construction pore-forming;
B, in described pore-forming, utilize annular sliding form apparatus to build retaining wall layer along pore-forming inwall with fast gel material under water from bottom to top, form retaining wall hole, in described retaining wall hole, transfer tubular reinforcing cage;
C, in the cylinder of described reinforcing cage, transfer coxopodite template, in described coxopodite template, from bottom to top section by section assembling and by plug-in counterweight transfer each precast segment inner formword formed internal mold, in retaining wall hole, build underplate concrete after locking internal mold and form concrete sealing bottom, coxopodite template is cast in the concrete sealing bottom in tubing string hole and positions, and makes retaining wall hole shape become the circular cylinder of back cover;
D, in the circular cylinder of described back cover, with described retaining wall layer for external mold, pipe shaft concrete is built between described external mold and internal mold, after described pipe shaft concrete reaches requirement of strength, remove the locking to internal mold, take out each precast segment inner formword from top to bottom, complete the construction of the underwater casting formula tubing string with retaining wall;
E, complete the construction of foundation platform at the end face cast top cover of the described underwater casting formula tubing string with retaining wall.
The feature of construction method of the present invention is also:
Arranging described each precast segment inner formword is hollow pontoon structure, and after discharging the locking to internal mold, each sections inner formword can rely on buoyancy to float and realize reclaiming.
The epimere of described coxopodite template is cylindrical tube, and hypomere is divergent-cone wall, and described coxopodite template is cast in the concrete sealing bottom in tubing string hole with its divergent-cone wall to position.
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 strand for stretch-draw between described each precast segment inner formword; Described locking steel strand utilize jack to carry out stretch-draw on the limiting platform of top, hole.
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.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, in the present invention, 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 concrete protecting sheathing to concrete structure;
2, in the present invention, retaining wall layer can retrain longitudinal direction and the hoop strain of tubing string preferably, cage of reinforcement can configure according to minimum steel ratio, greatly reduces with ordinary reinforced concrete immersed tube reinforcement ratio, and each sections inner formword is reused, thus saving cost, consumption also mitigates cage of reinforcement lifting weight.
3, compared with concrete prefabricated immersed tube, in the present invention retaining wall layer and internal mold match that to realize tubing string cast-in-place, solve the problem of the prefabricated Large-diameter Sinking Pipe transport difficult in place, greatly can improve efficiency of construction, the reduction of erection time;
4, in prior art, prefabricated component connects high in junction difficult treatment, and quality is wayward, and the present invention realizes cylinder pile foundation primary concreting and completes, and basis is whole, and can effectively improve fundamental mechanics performance, mass of foundation is reliable;
5, in prior art, prefabricated sinking engineering method needs to carry out Dispose by grouting after prefabricated component has sunk, and mud-jacking technology is complicated, especially squeezing quality bottom cylinder pile foundation is difficult to control, cause foundation bottom periphery loose, foundation bearing capacity is reduced, the present invention realizes disposable cast-in-place, does not need Dispose by grouting.And the present invention adopts steel work taper coxopodite template, can stretch to comparatively depths, then complete and build, because the concrete flowability of building can infiltrate each space through extruding, the loose problem of the bottom periphery that there will not be conventional construction method to cause by force.
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;
Fig. 7 is tubing string elevational schematic view of the present invention;
Fig. 8 is tubing string floor map of the present invention;
Fig. 9 is that tubing string of the present invention has built rear structural representation.
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 strand, 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, 14 pipe shaft concrete.
Detailed description of the invention
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, arrange in the present embodiment and for the form of structure of constructing with the inner formwork system of the underwater casting formula tubing string of retaining wall be:
As shown in Figure 1, comprise a 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 work hollow pontoon structure that can obtain buoyancy in water, and after discharging the locking to internal mold, each sections inner formword 3 can rely on buoyancy to float and realize reclaiming; 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 be 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 strand 7 for stretch-draw by the through wires hole 13 be arranged in prefabricated inner formword 3; Locking steel strand 7 utilize 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 cast in the concrete sealing bottom 11 in tubing string hole with its divergent-cone wall to position;
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.
See Fig. 7, Fig. 8 and Fig. 9, be between cast-in-place reinforced-concrete tubing string and pore-forming inwall, adopt fast gel material under water to build be formed with retaining wall layer 1 with the form of structure of the underwater casting formula tubing string of retaining wall in the present embodiment, tubing string forms concrete sealing bottom 11 with cast-in-situ concrete base plate.
The construction method of the underwater casting formula tubing string with retaining wall in the present embodiment is carried out as follows:
1, at the tubing string position place of setting, with drilling machine construction pore-forming;
2, in pore-forming, utilize annular sliding form apparatus to build retaining wall layer 1 along pore-forming inwall with fast gel material under water from bottom to top, form retaining wall hole, in retaining wall hole, transfer tubular reinforcing cage 2;
3, in the cylinder of reinforcing cage 2, coxopodite template 4 is transferred, in coxopodite template 4, assembling transfer each precast segment inner formword 3 by plug-in counterweight and form internal mold section by section from bottom to top, in retaining wall hole, build underplate concrete after locking internal mold and form concrete sealing bottom 11, coxopodite template 4 is cast in the concrete sealing bottom 11 in tubing string hole and positions, and makes retaining wall hole shape become the circular cylinder of back cover; Concrete enforcement is when below coxopodite template 4 is in orifice position to its end face, installs positioning vertical column in the first sections prefab form and " ten " word bracing frame at the end face of coxopodite template 4; 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, when utilizing plug-in counterweight, tile template each in each precast segment template is sunk on assigned address 6 times along positioning vertical column from aperture place successively, the locking steel strand 7 that top, hole limiting platform 8 utilizes jack 9 stretch-draw to be applied on each precast segment inner formword 3 in through wires hole 13 carry out compacting and lock, and complete internal mold and install.
4, in the circular cylinder of back cover, with described retaining wall layer 1 for external mold, pipe shaft concrete 14 is built between external mold and internal mold, after pipe shaft concrete 14 reaches requirement of strength, remove the locking to internal mold, take out each precast segment inner formword 3 from top to bottom, complete the construction of the underwater casting formula tubing string with retaining wall;
5, the construction of foundation platform is completed at the end face cast top cover of the underwater casting formula tubing string with retaining wall.
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.
The length of single-unit inner formword 3 is 6 ~ 15 meters, and each precast segment inner formword 3 is set to hollow pontoon structure, and after discharging the locking to inner formword, each sections inner formword 3 can rely on buoyancy to float and realize reclaiming, and it is reused, and saves cost, the saving duration; To be pressed into bottom pore-forming comparatively deep location with steel work taper coxopodite template 4, effectively can to play effect that is fixing and location inner formword.
Tubing string diameter of the present invention, at 3 to 6m, can be widely used in the engineering construction fields such as bridge room is built, hydro-structure, be applicable to the construction of land conventional base, as open caisson, tubing string etc.; Be particularly suited for the construction of foundation in water, as the king-post basis of bridge, Anchor Foundation, group wells basis etc. in water.Also can implement the measure increasing frictional force on the basis of this structure, form base type foundation etc. as headed into root key.
Claims (5)
1. the construction method with the underwater casting formula tubing string of retaining wall, described tubing string adopts fast gel material under water to build to be formed with retaining wall layer (1) between cast-in-place reinforced-concrete tubing string and pore-forming inwall, described tubing string forms concrete sealing bottom (11) with cast-in-situ concrete base plate, it is characterized in that described construction method is carried out as follows:
A, the tubing string position place set, with drilling machine construction pore-forming;
B, in described pore-forming, utilize annular sliding form apparatus to build retaining wall layer (1) along pore-forming inwall with fast gel material under water from bottom to top, form retaining wall hole, in described retaining wall hole, transfer tubular reinforcing cage (2);
C, in the cylinder of described reinforcing cage (2), transfer coxopodite template (4), assemble section by section above, from bottom to top described coxopodite template (4) and transfer each precast segment inner formword (3) by plug-in counterweight and form internal mold, in retaining wall hole, build underplate concrete after locking internal mold and form concrete sealing bottom (11), coxopodite template (4) is cast in the concrete sealing bottom (11) in tubing string hole and positions, and makes retaining wall hole shape become the circular cylinder of back cover;
D, in the circular cylinder of described back cover, with described retaining wall layer (1) for external mold, pipe shaft concrete (14) is built between described external mold and internal mold, after described pipe shaft concrete (14) reaches requirement of strength, remove the locking to internal mold, take out each precast segment inner formword (3) from top to bottom, complete the construction of the underwater casting formula tubing string with retaining wall;
E, complete the construction of foundation platform at the end face cast top cover of the described underwater casting formula tubing string with retaining wall.
2. construction method according to claim 1, it is characterized in that: arranging described each precast segment inner formword (3) is hollow pontoon structure, after discharging the locking to internal mold, each sections inner formword (3) can rely on buoyancy to float and realize reclaiming.
3. construction method 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 cast in the concrete sealing bottom (11) in tubing string hole with its divergent-cone wall to position.
4. construction method according to claim 1, is characterized in that: 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 strand (7) for stretch-draw between described each precast segment inner formword (3); Described locking steel strand (7) utilize jack (9) to carry out stretch-draw on top limiting platform, hole (8).
5. construction method according to claim 4, 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).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410172024.5A CN103911990B (en) | 2014-04-25 | 2014-04-25 | A kind of underwater casting formula tubing string with retaining wall and construction method thereof |
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| CN201410172024.5A CN103911990B (en) | 2014-04-25 | 2014-04-25 | A kind of underwater casting formula tubing string with retaining wall and construction method thereof |
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| CN103911990B true CN103911990B (en) | 2015-11-18 |
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| CN106337421B (en) * | 2016-10-28 | 2018-08-14 | 绍兴文理学院 | A kind of lattice concrete is compound to go along with sb. to guard him piling wall and the construction method based on BIM |
| CN111733805A (en) * | 2020-06-10 | 2020-10-02 | 合肥工业大学 | A cast-in-place large-diameter hollow tubular string foundation underwater mandrel system |
| CN111733798A (en) * | 2020-06-10 | 2020-10-02 | 合肥工业大学 | A self-protecting wall large diameter concrete hollow tubular column foundation |
| CN111733799A (en) * | 2020-06-10 | 2020-10-02 | 合肥工业大学 | A self-protecting wall large-diameter concrete hollow tubular column foundation forming method |
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| 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 |
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| CN203782691U (en) * | 2014-04-25 | 2014-08-20 | 安徽省高速公路控股集团有限公司 | Underwater pouring type pipe column provided with retaining wall and internal mold system thereof |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2163279C2 (en) * | 1998-12-28 | 2001-02-20 | Новосибирский государственный архитектурно-строительный университет | Method of making cast-in-place piles with root-like members and device for its embodiment |
| CN101311421A (en) * | 2006-01-26 | 2008-11-26 | 安徽省高速公路总公司 | Radical anchorage and construction method thereof |
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