CN105544382A - Construction method of dumbbell-shaped bearing platform - Google Patents
Construction method of dumbbell-shaped bearing platform Download PDFInfo
- Publication number
- CN105544382A CN105544382A CN201510916182.1A CN201510916182A CN105544382A CN 105544382 A CN105544382 A CN 105544382A CN 201510916182 A CN201510916182 A CN 201510916182A CN 105544382 A CN105544382 A CN 105544382A
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- Prior art keywords
- cofferdam
- cushion cap
- circular
- district
- bearing platform
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- 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
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Revetment (AREA)
Abstract
The invention discloses a construction method of a dumbbell-shaped bearing platform, which comprises the following steps: establishing a double-wall steel cofferdam at the periphery of the design position of the dumbbell-shaped bearing platform, wherein the cofferdam comprises two closed circular cofferdams, namely a first circular cofferdam and a second circular cofferdam, the first circular cofferdam is provided with a first bearing platform region, the second circular cofferdam is provided with a second bearing platform region, two ends of two linear section cofferdams positioned in the middles of the two circular cofferdams are respectively connected with the first circular cofferdam and the second circular cofferdam, a third bearing platform region is arranged between the two linear section cofferdams, and arc section cofferdams, positioned between the two linear section cofferdams, of the two closed circular cofferdams are middle cofferdams; lowering the whole cofferdam to the design position of the bearing platform for horizontally limiting; carrying out bearing platform construction on the first bearing platform region and the second bearing platform region; and then carrying out bearing platform construction on the third bearing platform region. The construction method disclosed by the invention has the advantages of low cost and short construction period.
Description
Technical field
The present invention relates to the technical field of construction of deep water foundation in bridge engineering, be specifically related to a kind of construction method of dumbbell shape cushion cap.
Background technology
In the design of suspension bridge foundation of main pylon, if the dumbbell shape cushion cap foundation that central binder connects is the comparatively normal cushion cap form adopted.For coordinating bearing platform construction, the dumbbell shape Double-Wall Steel Boxed Cofferdam all adopted, its weir wall box hat is strengthened wallboard and some horizontal section steel truss inside and outside perpendicular rib by band and formed, and the straightway cofferdam of central binder section must arrange powerful inner support under horizontal force action, uses a large amount of steel work.The stressed complexity at circular cofferdam and crossover location place, straightway cofferdam, design treatment is comparatively difficult.In order to ensure the dry environment of bearing platform construction, need to build back cover concrete under water in cofferdam and draw water.After drawing water in cofferdam, back cover concrete must bear larger buoyancy, and Double-Wall Steel Boxed Cofferdam wallboard and the drilled pile steel pile casting of cushion cap position, both sides provide vertical restraint forces for back cover concrete, effectively reduce the span that it bears buoyancy.But due to when body design, central authorities' binder is only considered to bear horizontal force, therefore generally drilled pile is not established below it, central authorities' binder place back cover concrete span is large, and back cover concrete is stressed the most unfavorable, adopts and set the mode of interim drilled pile to provide vertical constraint as central binder place back cover concrete in prior art, but setting up due to interim drilled pile, change the stress of the central binder as permanent structure, extend the duration of foundation construction simultaneously, add equipment investment.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of construction method of dumbbell shape cushion cap, there is the advantage that efficiency of construction is high, cost is low and the duration is short.
For reaching above object, the technical scheme that the present invention takes is:
A construction method for dumbbell shape cushion cap, comprises the following steps:
Set up Double-Wall Steel Boxed Cofferdam in the periphery of dumbbell shape cap design of pile position, wherein cofferdam comprises:
Two closed circle cofferdam, it comprises the first circular cofferdam and the second circular cofferdam, and described first circular cofferdam establishes the first cushion cap district, and described second circular cofferdam establishes the second cushion cap district;
The two ends being positioned at two straightway cofferdam in the middle of two circular cofferdams connect the first circular cofferdam and the second circular cofferdam respectively, and establish the 3rd cushion cap district between straightway cofferdam described in two;
The arc section cofferdam of two closed circle cofferdam between two straightway cofferdam is mid portion cofferdam;
Cofferdam entirety is transferred to cap design of pile position and carries out Horizontal limiting;
Again bearing platform construction is carried out to the first cushion cap district and the second cushion cap district;
Bearing platform construction is carried out to the 3rd cushion cap district.
On the basis of technique scheme, wherein, the Specific construction step in the first cushion cap district and the second cushion cap district is as follows,
1) build the back cover concrete of circular cushion cap, carry out circular cushion cap again and draw water;
2) the circular cushion cap reinforcing bar of colligation;
3) build the cushion cap concrete of circular cushion cap, reserve the bar splice between circular cushion cap and the 3rd cushion cap district and wet seam;
4) after the cushion cap concrete in circular cushion cap district reaches requirement of strength, concrete filling is carried out to the space, region between the part circular cofferdam except mid portion cofferdam and circular cushion cap.
On the basis of technique scheme, the construction sequence in the 3rd cushion cap district is as follows,
1) build the back cover concrete of central binder cushion cap, then carry out central binder cushion cap and draw water;
2) the mid portion cofferdam more than at the bottom of central binder cushion cap is cut off;
3) colligation central authorities binder cushion cap reinforcing bar, builds the cushion cap concrete of central binder cushion cap.
On the basis of technique scheme, described circular cofferdam is welded by some pieces of arc-shaped steel cofferdam unit pieces.
Compared with prior art, the invention has the advantages that:
The construction method of dumbbell shape cushion cap of the present invention, the circular cofferdam of both sides is closed, the working region of formation three cushion caps is overlapped with straightway cofferdam, bearing platform construction takes full advantage of the feature that both sides circular cofferdam only bears axial force under radial load, successfully avoid Double Circle cofferdam, cavity dumbbell two ends and manage complicated problem everywhere at circle orthogonal crunode, structural integrity is better, stressed more reasonable; Mid portion circular cofferdam directly can serve as the inner support in straightway cofferdam; Adopt three independent construction regions to construct respectively, reduce dumbbell shape bearing platform construction difficulty, set up interim auxiliary pile without the need to binder district again; Decrease the input of interim auxiliary pile and inner support, make the safer economy of deepwater foundation construction reliable.
Accompanying drawing explanation
Fig. 1 is cofferdam floor map in the present invention.
Fig. 2 is that casting area of the present invention divides schematic diagram.
Fig. 3 is the cofferdam schematic diagram after cutting off mid portion cofferdam in the present invention.
Fig. 4 is lateral view of the present invention.
In figure: 1-circular cofferdam, 2-straightway cofferdam, the circular cushion cap of 3-, 4-central authorities binder cushion cap, 5-wets seam, 6-mid portion cofferdam, 7-space, 8-first cushion cap district, 9-second cushion cap district, 10-the 3rd cushion cap district.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
See shown in Fig. 1 to 4, the embodiment of the present invention provides a kind of construction method of dumbbell shape cushion cap, comprises the following steps:
Step 1, according to the assembled Double-Wall Steel Boxed Cofferdam of the size of dumbbell shape cushion cap,
Wherein cofferdam comprises:
Two closed circle cofferdam 1, circular cofferdam 1 is welded by 24 pieces of arc-shaped steel cofferdam unit pieces, and it comprises the first circular cofferdam and the second circular cofferdam, and the first circular cofferdam establishes the first cushion cap district 8, second circular cofferdam to establish the second cushion cap district 9;
The two ends being positioned at two straightway cofferdam 2 in the middle of two circular cofferdams connect the first circular cofferdam and the second circular cofferdam respectively, and establish the 3rd cushion cap district 10 between straightway cofferdam described in two;
The arc section cofferdam of two closed circle cofferdam between two straightway cofferdam is mid portion cofferdam;
Step 2, transfers to cap design of pile position by cofferdam entirety and carries out Horizontal limiting;
Step 3, the circular cushion cap 3 of constructing in cushion cap district, both sides first 8 and the second cushion cap district 9,
1) build the back cover concrete in circular cushion cap 3 scope, back cover concrete makes circular cofferdam fixing with the drilled pile entirety being positioned at circular cofferdam 1, the weight of circular cofferdam 1 is gone to drilled pile and bears, draw water to circular cushion cap 3;
2) circular cushion cap 3 reinforcing bar of colligation;
3) build the cushion cap concrete of circular cushion cap 3, reserve the bar splice between circular cushion cap 3 and the 3rd cushion cap district 10 and wet seam 5;
4) after the cushion cap concrete of circular cushion cap 3 reaches requirement of strength, concrete filling is carried out to the space, region between the circular cofferdam 1 except mid portion cofferdam 6 and circular cushion cap 3, make circular cushion cap 3 participate in opposing hydraulic pressure;
Step 4, construction the 3rd cushion cap district 10,
1) the back cover concrete of central binder cushion cap 4 is built, because the back cover concrete in the side plate in middle body cofferdam 6 and circular cushion cap 3 scope forms entirety, the back cover concrete that itself and straightway cofferdam 2 one are all central binder cushion cap 4 provides constraint, reduce back cover concrete span, then central binder cushion cap 4 is drawn water;
2) the mid portion cofferdam 6 at central binder cushion cap 4 end more than is cut off;
3) colligation central authorities binder cushion cap 4 reinforcing bar, build the cushion cap concrete of central binder cushion cap 4, cushion cap foundation has been constructed.
The present invention is not limited to above-mentioned embodiment, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this manual belongs to the known prior art of professional and technical personnel in the field.
Claims (4)
1. a construction method for dumbbell shape cushion cap, is characterized in that, comprises the following steps:
Set up Double-Wall Steel Boxed Cofferdam in the periphery of dumbbell shape cap design of pile position, wherein cofferdam comprises:
Two closed circle cofferdam, it comprises the first circular cofferdam and the second circular cofferdam, and described first circular cofferdam establishes the first cushion cap district, and described second circular cofferdam establishes the second cushion cap district;
The two ends being positioned at two straightway cofferdam in the middle of two circular cofferdams connect the first circular cofferdam and the second circular cofferdam respectively, and establish the 3rd cushion cap district between straightway cofferdam described in two;
The arc section cofferdam of two closed circle cofferdam between two straightway cofferdam is mid portion cofferdam;
Cofferdam entirety is transferred to cap design of pile position and carries out Horizontal limiting;
Again bearing platform construction is carried out to the first cushion cap district and the second cushion cap district;
Bearing platform construction is carried out to the 3rd cushion cap district.
2. the construction method of a kind of dumbbell shape cushion cap as claimed in claim 1, is characterized in that:
Wherein, the Specific construction step in the first cushion cap district and the second cushion cap district is as follows,
1) build the back cover concrete of circular cushion cap, carry out circular cushion cap again and draw water;
2) the circular cushion cap reinforcing bar of colligation;
3) build the cushion cap concrete of circular cushion cap, reserve the bar splice between circular cushion cap and the 3rd cushion cap district and wet seam;
4) after the cushion cap concrete in circular cushion cap district reaches requirement of strength, concrete filling is carried out to the space, region between the part circular cofferdam except mid portion cofferdam and circular cushion cap.
3. the construction method of a kind of dumbbell shape cushion cap as claimed in claim 1, is characterized in that: the construction sequence in the 3rd cushion cap district is as follows,
1) build the back cover concrete of central binder cushion cap, then carry out central binder cushion cap and draw water;
2) the mid portion cofferdam more than at the bottom of central binder cushion cap is cut off;
3) colligation central authorities binder cushion cap reinforcing bar, builds the cushion cap concrete of central binder cushion cap.
4. the construction method of a kind of dumbbell shape cushion cap as claimed in claim 1, is characterized in that: described circular cofferdam is welded by some pieces of arc-shaped steel cofferdam unit pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510916182.1A CN105544382B (en) | 2015-12-10 | 2015-12-10 | Construction method of dumbbell-shaped bearing platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510916182.1A CN105544382B (en) | 2015-12-10 | 2015-12-10 | Construction method of dumbbell-shaped bearing platform |
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| Publication Number | Publication Date |
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| CN105544382A true CN105544382A (en) | 2016-05-04 |
| CN105544382B CN105544382B (en) | 2017-03-22 |
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| CN201510916182.1A Active CN105544382B (en) | 2015-12-10 | 2015-12-10 | Construction method of dumbbell-shaped bearing platform |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999206A (en) * | 2018-07-02 | 2018-12-14 | 中铁大桥勘测设计院集团有限公司 | A kind of construction method of bridge bearing platform |
| CN109137945A (en) * | 2018-10-26 | 2019-01-04 | 四川公路桥梁建设集团有限公司 | Cofferdam suitable for waist-shaped pier bearing platform and construction method thereof |
| CN109137960A (en) * | 2018-09-04 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of construction method of the dumbbell shape cushion cap suitable for land |
| CN110485443A (en) * | 2019-06-03 | 2019-11-22 | 四川公路桥梁建设集团有限公司 | 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process |
| CN111088809A (en) * | 2019-12-26 | 2020-05-01 | 中交武汉港湾工程设计研究院有限公司 | Water-stopping cofferdam structure for construction of undersea beam in sea and construction method |
| CN114164763A (en) * | 2021-11-10 | 2022-03-11 | 中交第四航务工程局有限公司 | Construction method of bridge pier column system |
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| CN2474571Y (en) * | 2001-04-24 | 2002-01-30 | 路桥集团第一公路工程局 | Suspending steel jacket box used for tie beam construction of two column bridge pier under water |
| KR20100113739A (en) * | 2009-04-14 | 2010-10-22 | 삼성물산 주식회사 | Template and costruction method for cofferdam using the same |
| CN203034468U (en) * | 2012-12-27 | 2013-07-03 | 中铁港航局集团有限公司 | Novel cofferdam for deep water foundation construction |
| JP2013224578A (en) * | 2013-06-04 | 2013-10-31 | Penta Ocean Construction Co Ltd | Reinforcing method of underwater structure and temporary coffering structure |
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| CN2474571Y (en) * | 2001-04-24 | 2002-01-30 | 路桥集团第一公路工程局 | Suspending steel jacket box used for tie beam construction of two column bridge pier under water |
| KR20100113739A (en) * | 2009-04-14 | 2010-10-22 | 삼성물산 주식회사 | Template and costruction method for cofferdam using the same |
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| JP2013224578A (en) * | 2013-06-04 | 2013-10-31 | Penta Ocean Construction Co Ltd | Reinforcing method of underwater structure and temporary coffering structure |
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Non-Patent Citations (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999206A (en) * | 2018-07-02 | 2018-12-14 | 中铁大桥勘测设计院集团有限公司 | A kind of construction method of bridge bearing platform |
| CN109137960A (en) * | 2018-09-04 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of construction method of the dumbbell shape cushion cap suitable for land |
| CN109137945A (en) * | 2018-10-26 | 2019-01-04 | 四川公路桥梁建设集团有限公司 | Cofferdam suitable for waist-shaped pier bearing platform and construction method thereof |
| CN110485443A (en) * | 2019-06-03 | 2019-11-22 | 四川公路桥梁建设集团有限公司 | 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process |
| CN111088809A (en) * | 2019-12-26 | 2020-05-01 | 中交武汉港湾工程设计研究院有限公司 | Water-stopping cofferdam structure for construction of undersea beam in sea and construction method |
| CN114164763A (en) * | 2021-11-10 | 2022-03-11 | 中交第四航务工程局有限公司 | Construction method of bridge pier column system |
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| Publication number | Publication date |
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| CN105544382B (en) | 2017-03-22 |
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Inventor after: Zhao Xiaojing Inventor after: Pan Dongfa Inventor after: Zhang Chunxin Inventor after: Chen Zhiren Inventor after: Mao Weiqi Inventor after: Tu Manming Inventor after: Wu Fangming Inventor after: Ma Tao Inventor after: Zhang Ruizhi Inventor before: Zhao Xiaojing Inventor before: Pan Dongfa Inventor before: Chen Zhiren Inventor before: Mao Weiqi Inventor before: Tu Manming Inventor before: Wu Fangming Inventor before: Ma Tao Inventor before: Zhang Ruizhi |
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