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

Active Publication Date: 2022-04-08
IN THE TUNNEL BUREAU OF THE SECOND ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general box girder prefabrication is to carry out box girder construction on the subgrade by self-built beam field according to the construction bid section. Conditions make it difficult to guarantee the quality and efficiency of box girder construction

Method used

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

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Embodiment Construction

[0050] The following is attached Figure 1-6 , please elaborate further.

[0051] The embodiment of the present application discloses a construction method of a prefabricated box girder in an alpine and high-altitude area. The construction method of prefabricated box girders in high-cold and high-altitude areas includes the following steps:

[0052] step one,

[0053] Construct a closed steel structure greenhouse, in which the columns and main beams are welded with round pipes to form a truss structure, the purlins are made of square pipes, and the sides and roof are made of color steel.

[0054] Pouring beam-making pedestal 1: Bind the pedestal reinforcement cage at the design position of beam-making pedestal 1 in the closed steel structure shed, install and fix the embedded parts, and arrange welding and fixing in the pedestal reinforcement cage along the length direction of the pedestal reinforcement cage at intervals of 2.5m Plate 12 and fixed screw rod 11, fixed screw ...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B23/02B28B7/38
CPCB28B23/024B28B7/384
Inventor 邱志军郭伟平刘建辉韩大鹏杜文辉吴云阁丑天乐吴彦华段新勇李渊
Owner IN THE TUNNEL BUREAU OF THE SECOND ENG
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