Cast-in-place prestressed concrete continuous box girder one-time pouring and forming construction method

A concrete and prestressed technology, which is applied in the field of cast-in-place prestressed concrete continuous box girder one-time pouring and forming construction, can solve the problems of large safety hazards in the construction process, high cost of building platforms, and low construction efficiency

Inactive Publication Date: 2018-12-07
NINGBO CONSTR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method of an assembled operating platform for pier column construction, so as to solve the t

Method used

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  • Cast-in-place prestressed concrete continuous box girder one-time pouring and forming construction method
  • Cast-in-place prestressed concrete continuous box girder one-time pouring and forming construction method

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Embodiment 1

[0073] like Figure 1-2 As shown, the cast-in-situ prestressed concrete continuous box girder of the present invention is one-time pouring and forming construction method, comprising foundation treatment, bracket erection, base form, side form laying, support preloading, base form, side form adjustment, bottom, web plate And beam reinforcement, prestressed pipes, prestressed tendons, inner formwork, end formwork laying, roof reinforcement, prestressed pipes, prestressed tendons, roof reinforcement installation, concrete pouring, maintenance, prestressed tendon tensioning, grouting, anchor sealing , template, support removal, specifically include the following steps:

[0074] 1) Foundation treatment

[0075] For the support foundation, select an area with relatively flat terrain and landform conditions. If the bearing capacity of the foundation within the scope of the support foundation cannot meet the requirements of the design plan, foundation treatment must be carried out s...

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Abstract

The invention discloses a cast-in-place prestressed concrete continuous box girder one-time pouring and forming construction method. The method includes the steps of foundation treatment, support erection, bottom mold and side mold laying, support pre-pressing, bottom mold and side mold adjustment, arrangement of bottom boards, webs and crossbeam reinforcing steel bars, prestressed pipelines and prestressed ribs, inner mold and end mold laying, arrangement of top board reinforcing steel bars, prestressed pipelines and prestressed ribs, top board reinforcing steel bar installation, concrete pouring and curing, prestressed rib tensioning, mud jacking and sealing anchorage, and formwork and support detachment. The problems of construction joints generated by a traditional construction processand transverse cracks of the jointing positions of flange plates and the webs can be solved, and the integral rigidity of a girder body is enhanced; the construction period of a continuous box girder is shortened, and the schedule of construction is quickened; and the use rate of a box girder formwork and steel pipe support transfer materials is increased, work efficiency is improved, treatmentof the construction joints is cancelled, erection and detachment work of supports in a box is reduced, working procedures are effectively switched, and expenditure of project management cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a one-time pouring forming construction method of a cast-in-place prestressed concrete continuous box girder. Background technique [0002] With the development of modern economy and technology and people's increasing demand for traffic conditions and transportation facilities, bridge engineering accounts for an increasing proportion of railways, expressways and municipal public transportation. People require standards for resources, environment and building performance. The construction of bridges is also constantly improving, and large-scale bridge construction is in full swing. In recent years, the box girder structure has gradually become popular, and many construction methods have appeared in the construction process. However, different methods should be selected according to different environments and seasons to improve the quality, safety and s...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D2/04
Inventor 叶剑伟谢伟光孙继文陈正新王彦芳俞毅
Owner NINGBO CONSTR GRP
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