Manufacture method for prefabricating support-free system bridge sections

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: ...

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.

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