Preflex prestressed concrete channel beam and its making method

A production method and concrete technology, which is applied in the field of bridge construction, can solve problems such as building height restrictions, and achieve the effects of light hoisting weight, improved fatigue resistance and earthquake resistance, and low building height
CN1730858AInactive Publication Date: 2006-02-08SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
Publication Date
2006-02-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is one kind of pre-bent pre-stressed concrete channel beam and its making process, and features that the concrete beam in channel shape or U shape consists of bottom plate and two side web plates. The web plates are concrete coated steel beam with welded shear keys, and the web plate and the steel beam have I-shaped, rectangular or box cross section. The making process of the concrete channel beam includes the five steps of: making steel beam, pre-pressing the steel beam, depositing the first concrete layer, releasing pre-bending force, and depositing the second concrete layer. Compared with available technology, the present invention has the advantages of large span, low building height, easy construction, excellent fatigue and vibration resistance, etc. and is especially suitable for use in condition with limited building height.
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Description

Technical field:

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to an under-supporting pre-bent prestressed concrete channel girder suitable for railway bridges, highway bridges, urban viaducts and rail transit systems and a manufacturing method thereof. Background technique:

[0002] At present, channel girders are widely used in the world. The earliest prestressed concrete channel girder abroad is the Rocherham Bridge built in Britain in 1952. After that, Japan, West Germany, and Australia have successively applied them in railway bridges. In the rail transit project, the prestressed trough beam with a double-line span of 50m was built in Lille, France; the prestressed trough beam with a span of 85m, a rectangular web, and a double-layer bottom plate was built on the Seine River for Line 13 in Paris. beam. The single-track trough-shaped girder with a span of 24m for the Beijing-Qin line across the Beijing-Chengdu line...

Claims

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