High-position non-jacking beam falling construction method

Abstract

The invention belongs to the technical field of bridge construction, and particularly relates to a high-position non-jacking beam falling construction method. The problems that in a traditional high-position beam falling process, multiple supporting points exist, beam falling needs to be conducted after jacking, and the beam falling time is long are solved, S100, a pier preformed groove is constructed in a pier, an opening of the pier preformed groove faces the other side of a poured beam section B, and the depth of the pier preformed groove needs to be slightly larger than the length of each segmented bearing screw; the groove can be square, round, oval or in other shapes, and reinforcing ribs need to be arranged on the periphery of the preformed groove of the pier when the pier is poured; s200, a precisely-rolled deformed steel bar system is pre-buried in the top face of the pier; s300, a box girder to be dropped is poured; s400, a high-position beam falling and non-jacking beam falling device is installed; s500, beam falling preparation is conducted; and S600, beam falling construction is carried out. The supporting points of the beam body are reduced by one time, jacking is not needed in the falling process of the beam body, the beam body does not need to be alternately supported, and the falling time of the beam body is short. Jacking is not needed, so that working procedures are reduced, and the construction progress is accelerated.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to a construction method for high-level beams without jacking up and falling. Background technique [0002] In the case that both ends are abutments or there are girders at both ends, there is no tension space after the box girder is cast-in-place. In the case of leaving post-casting belts, two methods are usually used: high-level cast-in-place and then falling beams or side-position cast-in-place and then laterally moving beams. Both methods have their own advantages and disadvantages. High-level cast-in-place and then falling beams need to increase the casting height of the box girder. Then use jacks and pads to alternately support the falling, which has a high risk factor. However, the method of cast-in-place beams next to the line and then laterally move the beams needs to be cast-in-place next to the line and then move laterally. Although it is safer, it requires mo...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of the traditional high-level beam drop process, such as many supporting points, the need to lift the beam before dropping the beam, and the long time for beam drop, the present invention provides a high-level beam drop construction method without jacking up

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