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Manufacture method for prefabricating support-free system bridge sections

A manufacturing method and segmental technology, applied to bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of difficult production of construction workers, errors in formwork installation, long construction period, etc., to achieve green construction technology, ensure quality, reduce Effect of Shrinkage and Creep Influence

Active Publication Date: 2012-06-13
瀚阳国际工程咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the influence of the outdoor environment, construction techniques such as formwork installation errors, steel bar binding, concrete pouring and outdoor maintenance make it difficult for construction workers to produce as in the factory
Therefore, the cast-in-place scheme has defects such as long construction period, poor quality, and environmental pollution.

Method used

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  • Manufacture method for prefabricating support-free system bridge sections
  • Manufacture method for prefabricating support-free system bridge sections
  • Manufacture method for prefabricating support-free system bridge sections

Examples

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Embodiment

[0041] The present invention mainly includes two parts: segmental prefabrication process and suspension assembly process. The girder and pier segments of the unsupported bridge are prefabricated by segmental prefabrication technology, and the girder on site is suspended and assembled by a bridge erecting machine. The control of structural deformation of unsupported bridges is much more complicated than that of ordinary continuous rigid frame bridges. Because of this, the accuracy of the on-site hoisting construction process of bridges without bearing systems becomes more important. In the suspension assembly process, the present invention proposes to first assemble the prefabricated sections of the bridge pier, and then use the bridge pier as the support of the bridge erecting machine to suspend and assemble the beam part by using the bridge erecting machine: that is, use the bridge erecting machine to place the prefabricated sections of the beam The sections are suspended in...

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Abstract

The invention discloses a manufacture method for prefabricating support-free system bridge sections, which comprises a first portion and a second portion. The first portion is that the section prefabricating technology is adopted to manufacture girder portions and bridge piers. The second portion comprises the steps of assembling bridge pier sections to be prefabricated, using the bridge piers as supports of a bridge girder erection machine and assembling the girder portions through the bridge girder erection machine, namely hanging sections to be prefabricated of the girder portions in positions through the bridge girder erection machine; then assembling the sections together through prestressing tendons to form simply supported girders, tying steel bars at the positions of wet connection gaps, pouring concrete, and stretching and drawing continuous tendons to form a continuous structure; and finally pouring concrete of side pier top sections and concrete of side piers, and stretching and drawing vertical prestressing tendons of the side piers to form a rigid framework. The section prefabricating technology is adopted to divide a whole concrete structure of a continuous rigid framework bridge, factorizing section manufacture is performed in a zero-stress state, the construction of the concrete structure is transferred from outside operation at heights to factory operation, and standardizing production can be performed.

Description

technical field [0001] The invention relates to the technical field of bridge manufacturing without a support bridge system, in particular to a method for manufacturing a bridge without a support system. Background technique [0002] Because the general bridge support is damaged or aged, it needs to be replaced, which will affect the operation of the bridge. Therefore, the bridge management unit hopes to avoid the above troubles and try not to use the support. Bridges without support systems are generally called continuous rigid frame bridges. The bridges have a simple structure and do not need supports. [0003] At present, the commonly used construction solution for bridges with continuous rigid frame system without supports at home and abroad is the cast-in-place scheme, that is, the construction is carried out by using the cast-in-place construction technology. Reinforcement, post pump poured concrete. [0004] The main disadvantages of the cast-in-place solution are: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 孙峻岭
Owner 瀚阳国际工程咨询有限公司
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