Rapid beam-replacing construction method for high speed railway 900 t concrete box beam

Abstract

The invention relates to a rapid beam-replacing construction method for a high speed railway 900 t concrete box beam. The construction method comprises the steps that an on-site beam-replacing construction structure and equipment are installed and arranged; 900 t cast-in-place concrete box beam is poured on the beam-replacing construction structure; after a new 900 t concrete box beam is manufactured on a cast-in-place support on the bridge hole side, beam-placing construction for a steel beam repaired temporarily and urgently is started to be carried out on the beam and a bridge hole, a transverse moving trolley moves on an erected trestle beam, and therefore replacement for the cast-in-place concrete box beam and the steel beam repaired temporarily and urgently is achieved. The rapid beam-replacing construction method for the high speed railway 900 t concrete box beam can well adapt to the on-site terrain environment, operation can be carried out on multiple hole bridges at the same time, the phenomenon that 900 t hoisting equipment is adopted on the construction site is effectively avoided, the beam-replacing construction can be achieved in a short time safely and reliably, and the comprehensive cost is low.

Description

technical field [0001] The invention relates to a construction method for fast frame replacement of concrete box girders, in particular to a construction method suitable for a 900t concrete box girder on a high-speed railway in my country after being damaged by a disaster and collapsed, and when the steel girder for repair is used to ensure the temporary opening of the line, next to the bridge hole After the new concrete box girder is manufactured, the rapid replacement of the repaired steel girder is a rapid construction technology to achieve permanent repair of the bridge. Background technique [0002] Most of the existing ordinary railway concrete simply supported beams are standardized T beams, and the weight of a single piece of a 32-meter beam is about 150 tons. During the construction of replacing the old railway beams, most of the new beams are prefabricated by the bridge factory and passed through the railway. Or road transport to the beam replacement site, and then ...

AI Technical Summary

Problems solved by technology

However, if it is a high-speed railway concrete box girder, the situation is quite different. The weight of the girder is nearly 900 tons. Considering the limited clearance of key points for interrupting traffic, the speed of changing the girder should be fast, regardless of the requirements of the equipment and the site. Requirements, on-site hoisting and installation requirements, etc., are quite different from the above-mentioned existing ordinary railway bridge construction, and the technical difficulty is much greater

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