Continuous splicing construction method of pier column for jacking broken beam of bridge

Abstract

The invention discloses a continuous splicing construction method of a pier column for jacking a broken beam of a bridge. The continuous splicing construction method of the pier column for jacking the broken beam of the bridge comprises the following steps of I, handling the structure of a broken beam splicing interface: chipping away concrete of a bottom section of an upper broken column to form an upper splicing joint where an obconical concrete boss is left in the middle part, and chipping away concrete of a top section of a lower pier column to form a lower splicing joint where an obconical concave groove is formed in the middle part; II, splicing main steel bars of the pier column and performing reinforcement construction on embedded steel bars; III, performing installation construction on concrete casting-moulding formworks, and arranging multiple concrete pouring ports and multiple laitance overflow ports in the upper part of the concrete casting-moulding formworks; IV, performing pouring construction on the concrete; and V, removing the formworks. With the adoption of the continuous splicing construction method of the pier column for jacking the broken beam of the bridge provided by the invention, the steps are simple, the design is rational, the construction cost is lower, the construction efficiency is high, the construction effect is good and the connection between the new concrete and the old concrete is reliable after the splicing; and therefore, the construction difficulties of concrete non-compactness, low strength and the like of a contact face between the upper broken column and the spliced section existing in the traditional construction method can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of bridge jacking construction, and in particular relates to a pier column continuous connection construction method for jacking up bridge broken columns. Background technique [0002] At present, jacking up of bridge broken columns is a unique construction method in bridge lifting and reconstruction construction. It mainly adopts the method of cutting bridge piers for existing bridge structures, and uses jacking equipment to jack up broken columns, cover beams and superstructures as a whole. to the design elevation, and then reinforce and continue the cut off upper and lower piers, so as to achieve the purpose of raising the bridge elevation. The adopted broken column jacking technology is economical, efficient and easy to operate, avoiding the impact of demolition and reconstruction on the environment and traffic, which not only improves the use function of the existing bridge structure, but also saves env...

AI Technical Summary

Problems solved by technology

However, in the actual use process, the above-mentioned existing broken column reinforcement and connection method has obvious defects in the treatment of new and old concrete, concrete pouring technology, etc., resulting in the interface between the post-cast concrete and the old concrete in the connection part of the bridge pier being not dense or the strength is partial. Low

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