Pushing construction method for corrugated steel web prestressed concrete combination beam
A corrugated steel web, jacking construction technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of crossing rivers and deep valleys, poor foundation bearing capacity, complex terrain, etc.
Inactive Publication Date: 2016-09-21
SINOHYDRO BUREAU 11 CO LTD
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Problems solved by technology
[0003] The object of the present invention is to provide a construction method of corrugated steel web prestressed concrete composite girder push-up, which overcomes the problems of complex terrain, poor foundation bearing capacity, crossing deep valleys of rivers and rivers, and large traffic flow.
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[0022] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings.
[0023] The steps of this construction method are: design and construction of the jacking prefabricated platform → fabrication and installation of corrugated steel web guide beams → prefabrication of corrugated steel web PC composite box girder → design and installation of jacking traction system → corrugated steel web PC composite box Beam top push.
[0024] The setting of the prefabricated platform is arranged along the axis of the bridge, the centerline of the pedestal should be basically consistent with the centerline of the bridge, and the longitudinal slope of the pedestal should be consistent with the longitudinal slope of the bridge. When considering falling beams, the elevation of the pedestal should be 30mm higher than the design elevation. The length of the pedestal meets the pr...
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The invention discloses a pushing construction method for a corrugated steel web prestressed concrete combination beam. After the corrugated steel web prestressed concrete combination beam is prefabricated on a platform through the pushing prefabrication platform arranged behind a bridge, a box girder is formed through multi-point continuous pushing jacks and high-strength steel strand dragged corrugated steel web prestressed concrete, and the box girder is made to move forwards in position along a sliding way. According to a construction technology, in the pushing process, a corrugated steel web guide beam can reach a next pier column in advance, so that the box girder is prevented from being in a large-cantilever state, and finally the box girder reaches the preset position. The method solves the problems that the terrain is complex, the foundation bearing force is poor, the beam strides over a river or a valley, and the traffic flow is large; and meanwhile the weight of the box girder as the superstructure can be effectively reduced, the construction procedures are simplified, and the manufacturing cost of a project is reduced.
Description
technical field [0001] The invention relates to the field of bridge construction. More specifically, it relates to a construction method for jacking up prestressed concrete composite beams with corrugated steel webs. Background technique [0002] The corrugated steel web prestressed concrete composite beam is a new type of steel-concrete composite system bridge. Its main advantages are: light weight, cost saving; reasonable structural stress, improved material utilization; simplified construction procedures, quick and easy construction; The structure has good anti-seismic performance, is easy to maintain and prolongs the service life; energy saving and environmental protection, beautiful appearance, etc. At present, the commonly used construction methods of this type of bridge in China mainly include: cast-in-place support, prefabricated assembly, and cantilever hanging basket construction. During the construction process, bridges often cross river valleys or complex terra...
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IPC IPC(8): E01D21/06
CPCE01D21/06
Inventor 韩亚军王宝兵何斌覃连云张清超韩亚东
Owner SINOHYDRO BUREAU 11 CO LTD