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Steel cantilever combined bridge deck slab widening and reconstruction structure and construction method thereof

A technology for transforming structures and construction methods, applied in the direction of bridge reinforcement, bridges, bridge parts, etc., to achieve the effects of reliable quality, controllable construction period and little traffic disturbance

Active Publication Date: 2017-02-22
孟庆华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the present invention provides a steel cantilever composite deck widening reconstruction structure and its construction method to solve the problems existing in the traditional box girder widening

Method used

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  • Steel cantilever combined bridge deck slab widening and reconstruction structure and construction method thereof
  • Steel cantilever combined bridge deck slab widening and reconstruction structure and construction method thereof
  • Steel cantilever combined bridge deck slab widening and reconstruction structure and construction method thereof

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Embodiment Construction

[0053] A plan to widen and transform the box girder of a steel cantilever composite bridge deck: the main part of the original box girder is retained, the cantilever ends on both sides (including the original bridge guardrail) are cut off, and the hollow steel cantilever is used as an auxiliary support. The composite bridge deck is extended from the original cantilever to the design width, and the concrete anti-collision guardrail of the original bridge is changed to a steel guardrail.

[0054] The reconstruction of the box girder by widening the steel cantilever composite bridge deck has certain restrictions on the widening capacity of the box girder. At the same time, it is necessary to reasonably determine the parameters such as the cutting position of the original box girder cantilever and the layout spacing of the steel cantilever along the bridge direction. The construction of the composite bridge deck should be considered. Convenience, and the impact of concrete shrinkag...

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Abstract

The invention discloses a steel cantilever combined bridge deck slab widening and reconstruction structure and a construction method thereof and aims at solving the problem existing in widening of a traditional box beam. The steel cantilever combined bridge deck slab widening and reconstruction structure comprises an original box beam and widening parts symmetrically arranged on two sides of the original box beam and is characterized in that each widening part comprises a steel cantilever, a steel bottom die, a steel guardrail and cast concrete, wherein the steel cantilever is a welding steel member of a triangular open web type structure, the steel cantilever is connected with the original box beam through an anchor bolt, and the steel bottom die is fixed to the steel cantilever, is provided with the cast concrete and form effective PBL key connection. The original box beam structure is fully utilized, and second phase dead load increase of the structure is small (only about 10% of an original structure), so that the lower portion and a foundation of an original bridge can be directly utilized, and the reconstruction project amount is remarkably decreased.

Description

technical field [0001] The invention belongs to the technical field of construction engineering and relates to the design of bridge widening in bridge engineering, in particular to the widening design of old concrete box girder bridges without adding pier columns. Background technique [0002] A perfect and well-developed highway traffic network is an inevitable requirement for social and economic development. With the rapid development of the national economy, the upgrading and transformation of existing highways, especially node interchanges, has become a new hot spot in the field of highway engineering. Among them, how to realize the widening and transformation of the cast-in-place box girder structure, improve the transformation efficiency, reduce the transformation cost, and ensure the structural safety have become the focus and focus of structural engineers. [0003] At present, some bridge widening examples at home and abroad often use the method of adding piers on on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D19/12
CPCE01D19/125E01D22/00
Inventor 孟庆华
Owner 孟庆华
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