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
CN106436591AActive Publication Date: 2017-02-22ε­ŸεΊ†εŽ
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ε­ŸεΊ†εŽ
Publication Date
2017-02-22

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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.
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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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