A construction method for prefabricated box girders in high-cold and high-altitude areas

A box girder construction and high-altitude technology, applied in manufacturing tools, ceramic molding machines, etc., can solve problems such as difficulty in guaranteeing box girder construction quality and efficiency, large temperature difference between day and night, improve processing accuracy and welding quality, and reduce arching , Improve the effect of installation accuracy
CN112809908BActive Publication Date: 2022-04-08IN THE TUNNEL BUREAU OF THE SECOND ENG +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
IN THE TUNNEL BUREAU OF THE SECOND ENG
Publication Date
2022-04-08

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Abstract

This application relates to the field of prefabricated box girders, in particular to a construction method for prefabricated box girders in high-cold and high-altitude areas, which includes the following steps: constructing a closed greenhouse, pouring a girder pedestal; Tire frame; steel bar processing; installation, tying, welding of bottom web steel bars, installation of embedded parts, to obtain bottom web steel bar skeleton; binding, welding of roof steel bars, to get roof steel bar skeleton; making prestressed pipes, installation of prestressed pipes; hoisting Bottom web steel frame to the preset position of beam-making pedestal; install side formwork; install inner formwork and fix the inner formwork against floating; hoist the roof steel frame; install liner in prestressed pipe; pour bottom slab concrete and web concrete And roof concrete; maintenance, formwork removal; prestressed beams are pierced, prestressed beams are stretched, prestressed tunnels are grouted and anchored; beams are moved and stored. The application has the effect of ensuring the prefabrication efficiency and quality of box girders in alpine and high altitude areas.
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Description

technical field

[0001] The present application relates to the field of prefabricated box girders, in particular to a construction method for prefabricated box girders in high cold and high altitude areas. Background technique

[0002] Box girder is a kind of beam in bridge engineering. It is hollow inside and has flanges on both sides of the upper part. It is named for its similarity to a box. The box girder of reinforced concrete structure is divided into prefabricated box girder and cast-in-place box girder. Among them, cast-in-situ box girders are mostly used for large continuous bridges; prefabricated box girders are widely used in current construction because they can be erected with bridge erecting machines after the completion of the substructure, which can speed up the progress of the project and save the construction period.

[0003] Box girder construction is an important link in expressway bridge construction, and the quality of the box girder produced is directl...

Claims

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