Pier column structure with segmental prefabricated shell and construction method of pier column structure

Abstract

The invention discloses a pier column structure adopting segmental prefabricated shells and a construction method thereof.The pier column structure comprises a plurality of pier column segments which are arranged in the height direction of a pier, every two adjacent pier column segments are connected through a vertical wet joint, any pier column segment comprises a plurality of prefabricated shells which are arranged in the circumferential direction of the pier and form a vertically-through barrel-shaped structure, and the prefabricated shells are arranged in the circumferential direction of the pier; the plurality of prefabricated shells are connected pairwise through the circumferential wet joints; and a cavity formed by the prefabricated shells is filled with the core filling concrete. According to the construction method, the prefabrication process and the cast-in-place process are combined, a novel construction method of partial prefabrication and partial cast-in-place is formed, under the condition that the connection stability of the pier column sections is guaranteed, the prefabricated shell of the single pier column section is subjected to annular block prefabrication, the hoisting weight of the prefabricated shell is effectively reduced, and prefabrication, transportation and hoisting are facilitated; and vertical and annular wet joints of the upper pier column section and core filling concrete of the lower pier column section are poured at the same time, synchronous equal strength is achieved, and the construction efficiency of the pier can be effectively improved.

Description

technical field [0001] The invention relates to the field of bridge foundation structure construction. More specifically, the present invention relates to a pier column structure using segmental prefabricated shells and its construction method. Background technique [0002] The construction of concrete bridge piers (towers) mostly adopts the cast-in-place process. The main construction methods are the overturning method, the climbing form method and the sliding form method, which involve steps such as steel bar binding, formwork installation and dismantling, concrete pouring and maintenance. Low quality, difficult quality control, and high risk of working at heights. With the continuous development of my country's economy, the demand for green and efficient construction is increasing. The problem of population aging will inevitably lead to the reduction of on-site labor force and the increase of labor costs. The traditional construction technology is facing the urgent need ...

AI Technical Summary

Problems solved by technology

Prefabricated bridge piers are usually constructed by the method of integral prefabrication or segmental prefabrication, which has problems such as heavy hoisting weight, high equipment and site requirements, and is difficult to promote and apply on a large scale

[0003] In order to solve the problem of heavy lifting and insufficient applicability of prefabricated bridge piers, the patent document CN207878263U proposes a semi-prefabricated pier segment, which is composed of a prefabricated outer shell, a prefabricated inner shell, ribs, hoop stirrups and vertical main reinforcements. Temporary pads are set between sections, connected by wet joints, and internal core-filling concrete is poured after the joints are equal in strength

The structure described in the above-mentioned patents has the following problems: the wet joints between sections occupy key lines, which will reduce the construction efficiency on site; The big problem has not been fundamentally resolved; the prefabricated shell is directly connected to the core-filled concrete, and the synergistic mechanical performance of the shell and the core-filled concrete is unknown

The structure and construction method described in the above patents have the following problems: only the prefabricated shell is provided, which cannot be applied to hollow piers; the prefabricated shell is directly connected to the core-filled concrete, and the interface bonding performance cannot be guaranteed. Under the working conditions with large horizontal force, the core filling part is easy to crack quickly, resulting in insufficient mechanical performance of the structure as a whole; the shell is an integral structure, if a full-height shell is used, there must be heavy lifting, prefabricated shell transportation and installation process. Vulnerability and other issues

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