Construction method for rectangular and variable section hollow pier of bridge

Abstract

The invention discloses a construction method for a rectangular and variable section hollow pier of a bridge, and relates to the field of bridge construction. The main aim is to solve the problems that an existing construction method is long in construction period, slow in formwork transfer and the like. Pier body steel bars are bound, a pier body solid segment formwork is installed, and pier bodyconcrete is cast; after the concrete is cast, the solid segment formwork is not detached and connected with long stiff skeletons, first and second segment inner and outer formworks are installed anderected on the top of the solid segment formwork, and first and second segment pier body concrete is cast; after a second pier body is constructed, pier body steel bars are bound, the solid segment formwork and the first segment formwork are first disassembled, then the second segment formwork is not disassembled temporarily, third and fourth segment formworks are sequentially installed and erected on the top of the second formwork, and pier body concrete is cast; two PVC tubes are pre-buried in a pier body, two steel rods penetrate into the PVC tubes, joist steel is placed on cantilevers of the steel rods, square timber and bottom formworks are laid on the joist steel, bent cap steel bars are bound, side formworks are closed, and concrete is cast. The construction method has the advantages that the construction period is short, and formwork transfer is rapid.

Description

Technical field: [0001] The invention relates to the field of bridge construction, in particular to a construction method for a hollow pier with a rectangular variable section of a bridge. Background technique: [0002] The pier body structure of the variable cross-section hollow pier consists of three parts: the upper solid section, the hollow section, and the lower solid section. In view of the thin wall and high pier of the hollow bridge pier, the concrete pouring construction is relatively difficult, so the concrete pouring of the pier body is divided into three constructions: the first construction of the lower solid section and part of the hollow section, the second construction of the remaining hollow part, and the third construction of the upper solid section construction. At present, the commonly used construction method is: after the first pouring of the pier body concrete is completed, the formwork is not removed, the scaffolding is directly erected, the second s...

AI Technical Summary

Problems solved by technology

The existing construction method of hollow piers with rectangular variable cross-sections for bridges has problems such as long construction period, cumbersome procedures, large formwork investment, and slow formwork turnover.