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Construction method for prefabricated box girder in high-cold and high-altitude area

A high-altitude box girder construction technology, applied in manufacturing tools, ceramic molding machines, etc., can solve the problems of large temperature difference between day and night, difficulty in guaranteeing the quality and efficiency of box girder construction, etc.

Active Publication Date: 2021-05-18
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. Construction conditions make it difficult to guarantee the quality and efficiency of box girder construction

Method used

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  • Construction method for prefabricated box girder in high-cold and high-altitude area
  • Construction method for prefabricated box girder in high-cold and high-altitude area
  • Construction method for prefabricated box girder in high-cold and high-altitude area

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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

The invention relates to the field of prefabricated box girders, in particular to a construction method of a prefabricated box girder in a high-cold and high-altitude area. The construction method comprises the following steps of constructing a closed greenhouse, and pouring a girder making pedestal; prefabricating a bottom web steel bar positioning jig frame and a top plate steel bar positioning jig frame; processing steel bars; mounting, binding and welding bottom web steel bars, and mounting embedded parts to obtain a bottom web steel bar framework; binding and welding top plate steel bars to obtain a top plate steel bar framework; manufacturing a prestressed pipe, and installing the prestressed pipe; hoisting the bottom web steel reinforcement framework to the preset position of the girder making pedestal; installing a side mold; installing an inner mold, and carrying out anti-floating fixing on the inner mold; hoisting the top plate steel bar framework; installing a liner pipe in the prestressed pipe; pouring bottom plate concrete, web plate concrete and top plate concrete; maintaining and removing the mold; arranging pre-stressed tendons in a penetrating mode, tensioning the pre-stressed tendons, and carrying out pre-stressed duct grouting and anchor sealing; and moving the girder and storing. The construction method has the effect of ensuring the prefabricating efficiency and quality of the box girder in the high-cold and high-altitude area.

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 Applications(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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