Construction method for non-cantilever sections of sidespans of multiplex continuous beam or steel-constructed beam

Abstract

The invention discloses a construction method for non-cantilever sections of sidespans of a multiplex continuous beam or a steel-constructed beam, which comprises the following steps: A10. respectively installing left formal supports, right formal supports, left temporary supports and right temporary supports at the tops of abutment piers; A20. respectively installing left sidespan top blocks and right sidespan top blocks on the left formal supports, the right formal supports, the left temporary supports and the right temporary supports; A30. casting temporary fill concrete in gaps between the left sidespan top blocks and the right sidespan top blocks, and horizontally and temporarily connecting finely-rolled threaded bars with vertical temporary anchoring finely-rolled threaded bars to form a firm and stable structure; A40. performing extension construction on lower left segment blocks and lower right segment blocks of a left sidespan and a right sidespan in sequence by adopting a cantilever method, and respectively anchoring through temporary auxiliary cantilever cables; A50. closing to an adjacent T-constructed cantilever beam; and A60. removing a temporary structure. In the construction method for the non-cantilever sections of the sidespans of the multiplex continuous beam or the steel-constructed beam, special treatment is performed on the two top blocks at the tops of the abutment piers of the adjacent sidespans to form an integral structure which is similar to a No. 0 block, and the non-cantilever section construction is performed on the integral structure like the T-constructed cantilever construction, thereby, the defects generated by adopting the existing construction methods in the past, such as a support method, a bridge girder erection machine hanging method and the like, are overcome.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method for a side span non-cantilever section of a multi-connected continuous beam or a multi-connected rigid frame beam. Background technique [0002] The continuous beam or rigid frame beam cantilever construction method is to use the completed bridge piers to hang out section by section along the span direction of the bridge and connect them symmetrically. It is a bridge construction method widely used at present. Or hanging basket cantilever pouring construction, but in the two construction methods, there are always non-cantilever constructions on both sides of the head and tail spans, which has always been a major technical problem in the construction of this type of bridge. With the continuous development of bridge technology and the continuous improvement of bridge construction level, there are more and more working conditions for erecting bridges in deep wate...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problems of large investment, high safety risk, complex construction process and long time-consuming in the construction of non-cantilever sections of side spans of multi-connected continuous beams or rigid frame beams

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