CN101725116A - Construction method for unbalanced swivel of pier top of continuous beam - Google Patents

Construction method for unbalanced swivel of pier top of continuous beam Download PDF

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Publication number
CN101725116A
CN101725116A CN201010300116A CN201010300116A CN101725116A CN 101725116 A CN101725116 A CN 101725116A CN 201010300116 A CN201010300116 A CN 201010300116A CN 201010300116 A CN201010300116 A CN 201010300116A CN 101725116 A CN101725116 A CN 101725116A
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CN
China
Prior art keywords
girder
pier
span
cantilever
anchor
Prior art date
Application number
CN201010300116A
Other languages
Chinese (zh)
Inventor
贺茂生
任回兴
李进
王飚
叶坤
廖立勋
孙克强
Original Assignee
中交第二公路工程局有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 中交第二公路工程局有限公司 filed Critical 中交第二公路工程局有限公司
Priority to CN201010300116A priority Critical patent/CN101725116A/en
Publication of CN101725116A publication Critical patent/CN101725116A/en

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Abstract

The invention relates to a prestressed concrete continuous beam bridge, in particular to a construction method for an unbalanced swivel of a pier top of a continuous beam in the concrete continuous beam bridge. The specific construction method finishes the construction of the unbalanced swivel of the pier top by six steps. The unbalanced swivel of the pier top of the continuous beam is characterized in that the swivel formed by a cushion cap of a bridge and a pier body of the bridge supports the whole body; a cantilever spanned main beam is a beam body which spans an existing line after rotating in place; an anchor spanned main beam balances the weight of the cantilever spanned main beam during the rotation; a pier top hinge is arranged between the top surface of the pier body of the bridge and the bottom of a main beam formed by the cantilever spanned main beam and the anchor spanned main beam; the pier top hinge serves as a medium for the rotation between the main beam and the pier top in the construction process of the swivel; and the pier top hinge is a steel ball hinge. The invention provides the construction method for the unbalanced swivel of the pier top of the continuous beam, which has the characteristics of safety, reliability, and simpler and more convenient swivel operation.

Description

Construction method for unbalanced swivel of pier top of continuous beam
Technical field
The present invention relates to construction method for unbalanced swivel of pier top of continuous beam in a kind of beams and prestress concrete continuous bridge, particularly concrete continuous girder bridge.
Background technology
Along with starting of China's transport development new round climax, need build the beams and prestress concrete continuous bridge in the existing highway of more leap, railway, river course, rotator construction has obtained using widely with advantages such as it are little to existing line operation influence, security risk is little.
Present such bridge general balance method of turning that adopts at the bottom of the pier of turning, that is: between the levels cushion cap, the system of flatting turn is set between perhaps at the bottom of cushion cap and the pier, comprise turning hinge, support and slideway etc., parallel existing line casting beams body, pier beam consolidation or temporary consolidation rotate around cushion cap after becoming integral body jointly, realize beam body cross-line.
Summary of the invention
The purpose of this invention is to provide a kind of safe and reliable, the more easy construction method for unbalanced swivel of pier top of continuous beam of operation of turning.
The object of the present invention is achieved like this, construction method for unbalanced swivel of pier top of continuous beam in the continuous girder bridge, and concrete grammar is:
1) builds bridge bearing platform and bridge pier shaft, arrange turning hinge at the Dun Ding of bridge pier shaft;
2) cantilever span girder and the anchor span girder in the parallel existing line support casting complete girder, wherein the anchor span girder is longer than the cantilever span girder, anchor span girder weight reach that the cantilever span kingpost cantalever strides more than 15%;
3) arrange the anchor span bracing frame along anchor span girder afterbody rotational trajectory, arrange turn slideway and traction facility at anchor span bracing frame end face;
4) cantilever span girder and the anchor span girder of removing in the girder poured into a mould support and other interim constraint to girder of Dun Ding;
5) will draw steel strand and be connected with girder, and start the traction facility and be shelved on anchor span girder tail end on the anchor span bracing frame, and drive cantilever span kingpost cantalever end, be the center of circle design attitude that turns an angle with pier top turning hinge, realizes that cantilever span beam body crosses over existing line;
6) jacking main beam is removed pier top turning hinge, and the main beam conversion is supported in permanent bearing, finishes the unbalanced swivel of pier top construction.
Unbalanced swivel of pier top of continuous beam in the continuous girder bridge is characterized in that: comprise the support integral of turning that bridge bearing platform, bridge pier shaft constitute, the cantilever span girder is a beam body of crossing over existing line after rotateing in place; The anchor span girder is the weight that balanced cantilever is striden girder in the rotation process, between at the bottom of bridge pier shaft end face and the girder that constitutes by cantilever span girder, anchor span girder, pier top turning hinge is arranged, pier top turning hinge is as the medium that relatively rotates between rotator construction process middle girder and the pier top, and pier top turning hinge adopts the steel ball hinge.
Below the described anchor span girder tail end and and the basis between the anchor span bracing frame is arranged, arrange turn slideway and traction facility at the end face of anchor span bracing frame.
Described anchor span girder overweights the cantilever span girder more than 15%.
Advantage of the present invention is: the unbalanced swivel of pier top new method is then adopted in this invention, that is: between at the bottom of Dun Ding and the beam, turning hinge is set, simultaneously anchor span weight is greater than cantilever span weight more than 15%, at the anchor span afterbody bracing frame is set, arrange circuit and limiting and guiding device, rotate around Dun Ding behind the parallel existing line casting beams body, realize beam body cross-line.Compare with conventional method, it is minimum to the possibility that existing line topples, more safe and reliable that this method is not rotated system, and the operation of turning is more easy.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1: unbalanced swivel of pier top of continuous beam construction system facade arrangement diagram;
Fig. 2: unbalanced swivel of pier top of continuous beam construction system layout plan.
Among the figure: 1, bridge bearing platform; 2, bridge pier shaft; 3, cantilever span girder; 4, anchor span girder; 5, pier top turning hinge; 6, anchor span bracing frame; 7, the slideway of turning; 8, traction facility.
The specific embodiment
As depicted in figs. 1 and 2, construction method for unbalanced swivel of pier top of continuous beam in the continuous girder bridge comprises: the support integral of turning that bridge bearing platform 1, bridge pier shaft 2 constitute, cantilever span girder 3 are crossed over the beam body of existing line for the back that rotate in place; Anchor span girder 4 is striden weight 3 for balanced cantilever in the rotation process, prevents the beam body that it topples to existing line, is supported in the abutment bearing after anchor span girder 4 rotate in place.Between at the bottom of the girder that bridge pier shaft 2 end faces and cantilever span girder 3, anchor span girder 4 constitute, pier top turning hinge 5 is set, pier top turning hinge 5 is as the medium that relatively rotates between rotator construction process middle girder and the pier top, and pier top turning hinge 5 adopts that Mo Chali are little, stable performance, steel ball hinge that bearing capacity is high.
Cantilever span girder 3 is crossed over the beam body of existing line for the back that rotate in place; Anchor span girder 4 is striden weight for balanced cantilever in the rotation process, prevents the beam body that it topples to existing line, is supported in the abutment bearing after rotateing in place.Below anchor span girder 4 tail ends and and the basis between anchor span bracing frame 6 is arranged, arrange turn slideway 7 and traction facility 8 at the end face of anchor span bracing frame 6, guiding and the accurate track of control girder in rotation process.Among the present invention traditional plane of rotation is changed to Dun Ding at the bottom of by pier, anchor span girder 4 overweights cantilever span girder 3, and more than 15%.
Compare with conventional method, it is minimum to the possibility that existing line topples, more safe and reliable that this method is not rotated system, and the operation of turning is more easy.
Comparatively smooth for the landform in the anchor span scope, the bridge that under-clearance is no more than 10m, the angle of turning is less especially is suitable for this method, needs fully to investigate construction condition before the construction.
Specific implementation method is:
1) builds bridge bearing platform 1 and bridge pier shaft 2, arrange turning hinge at the Dun Ding of bridge pier shaft 2;
2) cantilever span girder 3 and the anchor span girder 4 in the parallel existing line support casting complete girder, wherein anchor span girder 4 is longer than cantilever span girder 3, and anchor span girder 4 weight reach more than 15% of cantilever span girder 3 cantilever spans;
3) arrange anchor span bracing frame 6 along anchor span girder 4 afterbody rotational trajectories, arrange turn slideway 7 and traction facility 8 at anchor span bracing frame 6 end faces;
4) cantilever span girder 3 and the anchor span girder of removing in the girder 4 poured into a mould support and other interim constraints to girder of Dun Ding;
5) will draw steel strand is connected with girder, startup traction facility 8 is shelved on anchor span girder 4 tail ends on the anchor span bracing frame 6, driving cantilever span girder 3 cantilever ends, be the center of circle design attitude that turns an angle with pier top turning hinge 5, realizes cantilever span beam body leap existing line;
6) jacking main beam is removed pier top turning hinge 5, and the main beam conversion is supported in permanent bearing, finishes the unbalanced swivel of pier top construction.

Claims (4)

1. construction method for unbalanced swivel of pier top of continuous beam, concrete grammar is:
1) builds bridge bearing platform (1) and bridge pier shaft (2), arrange turning hinge at the Dun Ding of bridge pier shaft (2);
2) cantilever span girder (3) and the anchor span girder (4) in the parallel existing line support casting complete girder, wherein anchor span girder (4) is longer than cantilever span girder (3), and anchor span girder (4) weight reaches more than 15% of cantilever span girder (3) cantilever span;
3) arrange anchor span bracing frame (6) along anchor span girder (4) afterbody rotational trajectory, arrange turn slideway (7) and traction facility (8) at anchor span bracing frame (6) end face;
4) cantilever span girder (3) and the anchor span girder of removing in the girder (4) poured into a mould support and other interim constraint to girder of Dun Ding;
5) will draw steel strand is connected with girder, startup traction facility (8) is shelved on anchor span girder (4) tail end on the anchor span bracing frame (6), driving cantilever span girder (3) cantilever end, be the center of circle design attitude that turns an angle with pier top turning hinge (5), realizes cantilever span beam body leap existing line;
6) jacking main beam is removed pier top turning hinge (5), and the main beam conversion is supported in permanent bearing, finishes the unbalanced swivel of pier top construction.
2. unbalanced swivel of pier top of continuous beam comprises: the support integral of turning that bridge bearing platform (1), bridge pier shaft (2) constitute, cantilever span girder (3) are crossed over the beam body of existing line for the back that rotate in place; Anchor span girder (4) is striden the weight of girder for balanced cantilever in the rotation process, at bridge pier shaft (2) end face with between at the bottom of by the girder of cantilever span girder (3), anchor span girder (4) formation pier top turning hinge (5) is arranged, pier top turning hinge (5) is as the medium that relatively rotates between rotator construction process middle girder and the pier top, and pier top turning hinge (5) adopts the steel ball hinge.
3. unbalanced swivel of pier top of continuous beam according to claim 2, it is characterized in that: below described anchor span girder (4) tail end and and the basis between anchor span bracing frame (6) is arranged, arrange at the end face of anchor span bracing frame (6) and turn slideway (7) and draw facility (8).
4. unbalanced swivel of pier top of continuous beam according to claim 2 is characterized in that: described anchor span girder (4) overweights cantilever span girder (3) more than 15%.
CN201010300116A 2010-01-07 2010-01-07 Construction method for unbalanced swivel of pier top of continuous beam CN101725116A (en)

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Application Number Priority Date Filing Date Title
CN201010300116A CN101725116A (en) 2010-01-07 2010-01-07 Construction method for unbalanced swivel of pier top of continuous beam

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Application Number Priority Date Filing Date Title
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101864739A (en) * 2010-06-18 2010-10-20 徐国彬 Bridge rotation device and bridge rotation construction method
CN103924530A (en) * 2014-04-30 2014-07-16 中铁西南科学研究院有限公司 Method and system for regulating and controlling balance weight in bridge swivel construction process
CN104652290A (en) * 2015-02-03 2015-05-27 成军 Horizontal rotating construction method for steel truss beam bridge
CN105507163A (en) * 2015-11-26 2016-04-20 中铁四局集团建筑工程有限公司 Device for discriminating swivel bridge weighing test critical point and detection method
CN105544374A (en) * 2015-12-24 2016-05-04 苏州第一建筑集团有限公司 Non-self-balancing steel truss large-span arch bridge swivel and construction method thereof
CN106702909A (en) * 2017-01-26 2017-05-24 中建三局集团有限公司 Integral swiveling structure for double-body steel box girder and construction method thereof
CN106758831A (en) * 2016-12-14 2017-05-31 中铁十九局集团第二工程有限公司 Across railway bridge swivel continuous beam construction method
CN107165057A (en) * 2017-07-13 2017-09-15 中铁八局集团昆明铁路建设有限公司 A kind of high pier swivel T structures continuous beam continues casting method
CN107700369A (en) * 2017-09-20 2018-02-16 中铁武汉勘察设计研究院有限公司 A kind of design and construction method of bridge rotating under pole asymmetrical state
CN110144830A (en) * 2019-04-28 2019-08-20 中国铁路设计集团有限公司 A kind of bridge pier top body rotation construction method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101864739A (en) * 2010-06-18 2010-10-20 徐国彬 Bridge rotation device and bridge rotation construction method
CN103924530A (en) * 2014-04-30 2014-07-16 中铁西南科学研究院有限公司 Method and system for regulating and controlling balance weight in bridge swivel construction process
CN104652290A (en) * 2015-02-03 2015-05-27 成军 Horizontal rotating construction method for steel truss beam bridge
CN105507163A (en) * 2015-11-26 2016-04-20 中铁四局集团建筑工程有限公司 Device for discriminating swivel bridge weighing test critical point and detection method
CN105544374A (en) * 2015-12-24 2016-05-04 苏州第一建筑集团有限公司 Non-self-balancing steel truss large-span arch bridge swivel and construction method thereof
CN106758831A (en) * 2016-12-14 2017-05-31 中铁十九局集团第二工程有限公司 Across railway bridge swivel continuous beam construction method
CN106702909A (en) * 2017-01-26 2017-05-24 中建三局集团有限公司 Integral swiveling structure for double-body steel box girder and construction method thereof
CN106702909B (en) * 2017-01-26 2018-09-07 中建三局集团有限公司 A kind of double width steel box-girder entirety swivel structure and construction method
CN107165057A (en) * 2017-07-13 2017-09-15 中铁八局集团昆明铁路建设有限公司 A kind of high pier swivel T structures continuous beam continues casting method
CN107700369A (en) * 2017-09-20 2018-02-16 中铁武汉勘察设计研究院有限公司 A kind of design and construction method of bridge rotating under pole asymmetrical state
CN107700369B (en) * 2017-09-20 2019-04-16 中铁武汉勘察设计研究院有限公司 A kind of design and construction method of bridge rotating under pole asymmetrical state
CN110144830A (en) * 2019-04-28 2019-08-20 中国铁路设计集团有限公司 A kind of bridge pier top body rotation construction method
CN110144830B (en) * 2019-04-28 2020-10-16 中国铁路设计集团有限公司 Bridge pier top rotation construction method

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Application publication date: 20100609