CN102277835A - Method for constructing single-column bent cap by adopting hoop and A-frame composite system - Google Patents

Method for constructing single-column bent cap by adopting hoop and A-frame composite system Download PDF

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Publication number
CN102277835A
CN102277835A CN2011101195287A CN201110119528A CN102277835A CN 102277835 A CN102277835 A CN 102277835A CN 2011101195287 A CN2011101195287 A CN 2011101195287A CN 201110119528 A CN201110119528 A CN 201110119528A CN 102277835 A CN102277835 A CN 102277835A
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CN
China
Prior art keywords
anchor ear
girders
installing
hoop
bent cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011101195287A
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Chinese (zh)
Inventor
王志朋
夏志华
刘壮
刘洋
陈兆祥
王月娇
孙雷
兰宪钢
姚长见
毛晓东
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China Railway No 9 Group Co Ltd
Original Assignee
China Railway No 9 Group Co Ltd
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Filing date
Publication date
Application filed by China Railway No 9 Group Co Ltd filed Critical China Railway No 9 Group Co Ltd
Priority to CN2011101195287A priority Critical patent/CN102277835A/en
Publication of CN102277835A publication Critical patent/CN102277835A/en
Pending legal-status Critical Current

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Abstract

The invention provides a method for constructing a single-column bent cap by adopting a hoop and A-frame composite system. The method comprises the following steps of: 1) installing hoops: installing upper and lower hoops on pier columns from bottom to top in sequence, placing the upper hoop in the appointed elevation position and clamping and fixing the upper hoop, and installing the lower hoop in the position 5m away from the upper edge of the upper hoop and clamping and fixing the lower hoop; 2) installing spandrel girders and distributive girders: installing two spandrel girders on each pier column and arranging a plurality of distributive girders on the spandrel girders, wherein the spandrel girders adopt battened channel steel; 3) prepressing: prepressing the hoops and girders after the hoops and girders are installed; 4) pouring a bent cap above the distributive girders: erecting formworks and installing reinforcement cages on the distributive girders, firstly installing bottom forms, hoisting and placing the reinforcement cages in the appointed positions, and then installing side forms and end forms; and 5) concreting: carrying out concreting after the formworks are installed. The method has the following beneficial effects: the construction process is simple; the hoops are convenient to install; the investment in the used materials is less than the investment in the steel tube brackets; and the space under the bridge is not occupied.

Description

The single-column bent cap adopts anchor ear and A-frame combined system job practices
Technical field
The present invention is applicable to the job practices of single-column bent cap in the bridge engineering in crossing highway, railway and river.
Background technology
Bent cap construction is to use the support system that mixes of steel pipe, steel casement door formula full framing support system or shellfish thunder frame and steel pipe, steel casement door formula frame routinely.The characteristics of this class support system are that material usage is big, to ground requirement for bearing capacity height, and can take space under the bridge, and set up difficulty.
Summary of the invention
The purpose of the invention provides and a kind ofly saves timbering material, simple installation, bearing capacity of foundation soil no requirement (NR), the single-column bent cap that do not take space under the bridge are adopted anchor ear and A-frame combined system job practices.
The purpose of the invention realizes by following method: the single-column bent cap adopts anchor ear and A-frame combined system job practices, and its step is as follows:
(1) anchor ear is installed: two anchor ears are installed on the pier stud successively according to the order that gets on, get off up and down, and last anchor ear is placed to appointment absolute altitude position and is fixedly clamped, and following anchor ear is installed in last anchor ear top edge distance and is 5 meters position and is fixedly clamped;
(2) spandrel girder and distribution beam are installed: two spandrel girders are installed on the every pier stud, spandrel girder adopts two limb channel-section steels, and some distribution beam are set on spandrel girder, and distribution beam adopts single limb channel-section steel, for preventing that beam from toppling, will descend anchor ear and spandrel girder welding with two bearing diagonals;
(3) precompressed: after anchor ear and beam install, carry out precompressed;
(4) pouring into a mould bent cap above the distribution beam: on distribution beam, carry out formwork support arrangement and reinforcing cage and install, earlier bed die is installed, reinforcing bar cage hoisting is placed to assigned address, side form and end mould are installed then;
(5) concreting: after template installs, concreting.
The beneficial effect of the invention: it is the way that two steel hoops are set on same single-column that single-column bent cap of the present invention adopts anchor ear and A-frame combined system job practices, makes spandrel girder and anchor ear form triangular structure, increases its stability.Two anchor ears are installed on the single-column successively according to the order that gets on, get off about inciting somebody to action in the installation process, and last anchor ear is placed to appointment absolute altitude position and is fixedly clamped, and following anchor ear is installed in last anchor ear top edge distance and is 5 meters position and is fixedly clamped.Spandrel girder adopts two limb channel-section steels, adopts spacing steel pipe to fix between the spandrel girder, prevents its slippage.Distribution beam adopts single limb channel-section steel, for preventing that beam from toppling, to descend anchor ear and spandrel girder welding with two bearing diagonals, bearing diagonal adopts channel-section steel to make, every skew back supports and spandrel girder angle at 45 approximately, and in the midpoint of bearing diagonal and the perpendicular support of spandrel girder welding, all weld seams require zero defects, weldering full, and width is not less than 1cm.After anchor ear and beam install, whether precompressed 12 hours is enough to confirm its bearing capacity.Pouring into a mould bent cap above the distribution beam again: on distribution beam, carry out formwork support arrangement and reinforcing cage and install, earlier bed die is installed, reinforcing bar cage hoisting is placed to assigned address, side form and end mould are installed then; Carry out concreting at last: after template installs, concreting, maintenance is carried out follow-up works such as form removal to stipulating the length of time.This method construction technology is simple, and steel hoop is easy for installation, and material therefor does not take space under the bridge than the steel pipe support less investment.
Description of drawings
Fig. 1 adopts the single-column bent cap to adopt the braced structures front view of anchor ear and the construction of A-frame combined system job practices.
Fig. 2 adopts the single-column bent cap to adopt the braced structures left view of anchor ear and the construction of A-frame combined system job practices.
Fig. 3 adopts the single-column bent cap to adopt the braced structures vertical view of anchor ear and the construction of A-frame combined system job practices.
Among the figure: 1, go up anchor ear; 2, following anchor ear; 3, bearing diagonal; 4, perpendicular support; 5, spandrel girder; 6, distribution beam; 7, pier stud; 8, bent cap; 9, spacing steel pipe; 10, lacing wire.
The specific embodiment
The single-column bent cap adopts anchor ear and A-frame combined system job practices, and its step is as follows.
(1) anchor ear is installed: the construction of single-column bent cap steel hoop method is compared with the construction of twin columns bent cap, maximum difference is that pier stud has only an anchor ear, cause spandrel girder in concreting process, to topple easily, this method is at this problem, employing is provided with the way of two anchor ears on same pier stud 7, make spandrel girder and anchor ear form triangular structure, increase its stability.To up and down in the installation process, two anchor ears are installed on the pier stud 7 successively according to the order that gets on, get off, last anchor ear 1 is placed to appointment absolute altitude position and is fixedly clamped, following anchor ear 2 is installed in last anchor ear 1 top edge distance and is 5 meters position and is fixedly clamped, last anchor ear 1 is as the load anchor ear, and following anchor ear 2 is as the insurance anchor ear.In order to improve the frictional force between pier stud and anchor ear, the thick rubber pad of 2 ~ 3mm is set between pier stud and anchor ear, not only improve frictional force, and protected the concrete surface of pier stud.
(2) spandrel girder and distribution beam are installed: each pier stud 7 is provided with 2 spandrel girders 5, be erected at the section of stretching out of anchor ear, 14 distribution beam 6 distribute on the spandrel girder 5, spandrel girder 5 adopts two limb channel-section steels, adopt spacing steel pipe 9 and lacing wire 10 fixing between the spandrel girder 5, prevent its slippage, the single limb channel-section steel of distribution beam 6 usefulness, for preventing that beam from toppling, to descend anchor ear 2 and spandrel girder 5 welding with two bearing diagonals 3, bearing diagonal 3 and spandrel girder 5 angle at 45 approximately, and the perpendicular support 4 of welding between bearing diagonal 3 midpoint and spandrel girder 5.
(3) precompressed: after anchor ear and beam install, precompressed 12 hours, whether enough to confirm its bearing capacity, all weld seams require zero defect, weldering to expire, and width is not less than 1cm.
(4) at cast bent cap 8 above the distribution beam 6: on distribution beam 6, carry out formwork support arrangement and reinforcing cage and install, earlier bed die is installed, reinforcing bar cage hoisting is placed to assigned address, side form and end mould are installed then.
(5) concreting: after template installed, concreting formed bent cap 8, and maintenance is carried out follow-up works such as form removal to stipulating the length of time.

Claims (1)

1. the single-column bent cap adopts anchor ear and A-frame combined system job practices, and its step is as follows:
(1) anchor ear is installed: two anchor ears are installed on the pier stud successively according to the order that gets on, get off up and down, and last anchor ear is placed to appointment absolute altitude position and is fixedly clamped, and following anchor ear is installed in last anchor ear top edge distance and is 5 meters position and is fixedly clamped;
(2) spandrel girder and distribution beam are installed: two spandrel girders are installed on the every pier stud, and spandrel girder adopts two limb channel-section steels, and some distribution beam are set on spandrel girder, and distribution beam adopts single limb channel-section steel, will descend anchor ear and spandrel girder welding with two bearing diagonals;
(3) precompressed: after anchor ear and beam install, carry out precompressed;
(4) pouring into a mould bent cap above the distribution beam: on distribution beam, carry out formwork support arrangement and reinforcing cage and install, earlier bed die is installed, reinforcing bar cage hoisting is placed to assigned address, side form and end mould are installed then;
(5) concreting: after template installs, concreting.
CN2011101195287A 2011-05-10 2011-05-10 Method for constructing single-column bent cap by adopting hoop and A-frame composite system Pending CN102277835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011101195287A CN102277835A (en) 2011-05-10 2011-05-10 Method for constructing single-column bent cap by adopting hoop and A-frame composite system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011101195287A CN102277835A (en) 2011-05-10 2011-05-10 Method for constructing single-column bent cap by adopting hoop and A-frame composite system

Publications (1)

Publication Number Publication Date
CN102277835A true CN102277835A (en) 2011-12-14

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102758399A (en) * 2012-07-19 2012-10-31 西安建筑科技大学 Attached opening-closing protective cover of urban bridge
CN106400694A (en) * 2016-11-14 2017-02-15 中交第二航务工程局有限公司 Fabricated prestressing device and method for high pier scaffoldings
CN107100076A (en) * 2017-02-27 2017-08-29 中铁十九局集团有限公司 A kind of Cast-in-place Bent Cap construction method
CN109056536A (en) * 2018-08-09 2018-12-21 杭州江润科技有限公司 Based on combined type hoop bracket construction of cast-in-situ box-beam method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2873867Y (en) * 2006-02-10 2007-02-28 路桥集团第一公路工程局 Pier column hoop device
CN201128881Y (en) * 2007-11-15 2008-10-08 中交第一公路工程局有限公司 Preformed supporting structure in bent cap construction
CN201377077Y (en) * 2009-03-25 2010-01-06 中铁二十一局集团第三工程有限公司 Double-hoop bracket for single-column bent cap in bridge construction
CN101949132A (en) * 2010-10-18 2011-01-19 中铁十九局集团有限公司 Method for constructing bent cap beam template support of isolated pier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2873867Y (en) * 2006-02-10 2007-02-28 路桥集团第一公路工程局 Pier column hoop device
CN201128881Y (en) * 2007-11-15 2008-10-08 中交第一公路工程局有限公司 Preformed supporting structure in bent cap construction
CN201377077Y (en) * 2009-03-25 2010-01-06 中铁二十一局集团第三工程有限公司 Double-hoop bracket for single-column bent cap in bridge construction
CN101949132A (en) * 2010-10-18 2011-01-19 中铁十九局集团有限公司 Method for constructing bent cap beam template support of isolated pier

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102758399A (en) * 2012-07-19 2012-10-31 西安建筑科技大学 Attached opening-closing protective cover of urban bridge
CN106400694A (en) * 2016-11-14 2017-02-15 中交第二航务工程局有限公司 Fabricated prestressing device and method for high pier scaffoldings
CN106400694B (en) * 2016-11-14 2018-07-03 中交第二航务工程局有限公司 A kind of high pier stent assembled prepressing device and method
CN107100076A (en) * 2017-02-27 2017-08-29 中铁十九局集团有限公司 A kind of Cast-in-place Bent Cap construction method
CN109056536A (en) * 2018-08-09 2018-12-21 杭州江润科技有限公司 Based on combined type hoop bracket construction of cast-in-situ box-beam method
CN109056536B (en) * 2018-08-09 2020-04-28 杭州江润科技有限公司 Cast-in-place box girder construction method based on combined hoop support

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Application publication date: 20111214

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