Separated ultra-wide prestressed concrete box girder structure and construction method thereof

A technology of concrete box girders and construction methods, applied in bridges, bridge construction, bridge materials, etc., can solve the problems of large temperature difference between inside and outside of super-wide concrete box girder structures, large temperature cracks, etc., to improve air convection efficiency and reduce temperature automatically Stress, the effect of improving construction safety

Pending Publication Date: 2022-08-05
CHINA MAJOR BRIDGE ENERGINEERING
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Problems solved by technology

[0004] The embodiment of the present application provides a separate ultra-wide prestressed concrete box girder structure and its construction method to solve the problem of large temperature difference between the inside and outside of the ultra-wide concrete box girder structure and the occurrence of a large number of temperature cracks

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  • Separated ultra-wide prestressed concrete box girder structure and construction method thereof
  • Separated ultra-wide prestressed concrete box girder structure and construction method thereof
  • Separated ultra-wide prestressed concrete box girder structure and construction method thereof

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[0039] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0040] The embodiments of the present application provide a detached ultra-wide prestressed concrete box girder structure and a construction method thereof, which can solve the problem of large temperature difference between the inside and outside of the ultra-wide concrete box girder structure and a large number of temperature crac...

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Abstract

The invention discloses a separated ultra-wide prestressed concrete box girder structure and a construction method thereof, and relates to the technical field of mixed cable-stayed bridge construction. The concrete box girder structure comprises a middle box girder, two side box girders and connecting girders, the middle box girder and the two side box girders are connected through a plurality of connecting girders, and the width of the concrete box girder structure is increased. The separated ultra-wide prestressed concrete box girder structure is decomposed into three box girders for construction, and in addition, the mode that all the separated box girders are constructed firstly, and then the connecting beam and the post-pouring section are constructed is adopted; the adverse effect of asynchronous longitudinal deformation, caused by factors such as self weight, prestress tension, shrinkage creep and temperature, of all the separation box girders on the connecting beam can be effectively reduced. In addition, the rigidity of the cast-in-place support can meet the requirement of each box girder, the pouring difficulty is reduced, maintenance is convenient, the risk that the concrete beam cracks in the construction process is effectively reduced, the construction safety is improved, and the construction quality is guaranteed.

Description

technical field [0001] The present application relates to the technical field of hybrid cable-stayed bridge construction, in particular to a detached ultra-wide prestressed concrete box girder structure and a construction method thereof. Background technique [0002] With the increase of traffic volume year by year, the multifunctional requirements of bridge structures are also gradually improved, and the construction of highway-railway bridges has become the main development trend today. For cable-stayed bridges on the same floor of the road and rail with relatively small side and mid-spans, steel-concrete hybrid girder cable-stayed bridges are usually the first choice for bridge design. Bridge versatility requirements. [0003] At present, the side-span concrete box girders of steel-concrete hybrid cable-stayed bridges are mostly in the form of integral concrete box girders. The combination of multi-lane highway and multi-track railway will inevitably increase the width o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/04E01D21/00E01D101/28
CPCE01D2/04E01D21/00E01D2101/28
Inventor 肖海珠张晶易莉帮戴慧敏潘韬傅战工李帅帅冯龙兴
Owner CHINA MAJOR BRIDGE ENERGINEERING
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