Variable cross-section high pier turnover formwork structure and construction method

Abstract

The invention discloses a variable cross-section high pier turnover formwork structure and a construction method, relating to the field of bridge construction. The structure comprises a base carrier platform, a multi-section inner template system, a multi-section outer template system, a stiff skeleton and so on. The structure has the following characteristics that firstly, the pre-buried stiff skeleton of the variable cross-section high pier is calculated through multiple formulas, and maximum impact of a vibration rod is considered when the stiff skeleton resists wind and is concreted, so that the strength, rigidity and safety of the stiff skeleton are guaranteed; secondly, oriented by the stiff skeleton, multiple backridges are provided with scales at horizontal top surfaces of two ends, so as to control an installation fixing position at the top surface of an outer longitudinal template to position a slope ratio of a variable cross section accurately; and thirdly, a regulating boltis set to regulate the position of the outer longitudinal template, so as to improve the accuracy of the slope ratio of the currently casted template of a variable cross section pier body. The quality of the variable cross-section high pier is improved and construction security is ensured, effects of resource conservation, accelerated progress, energy conservation and emission reduction are achieved, and social benefits and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to an overturned formwork structure and a construction method for high bridge piers with variable cross-sections. Background technique [0002] The high piers of bridges spanning large rivers and deep ditches and canyons are generally constructed with or without supports. Turnover construction generally consists of 2 to 4 sections of formwork with a height of 2m to 3m. After pouring the top section of concrete, turn the bottom section of the formwork to the top section, use the top section of the formwork as a support, and install the upper section of the formwork to cast the upper pier Concrete body, cycle and alternate lifting construction. When the main reinforcement of the pier body is lengthened, the length is generally 3 to 4 times the height of a section, and the stability is poor. Before the binding is formed, the stiff skeleton pre-buried in the pier body is used as a re...

AI Technical Summary

Problems solved by technology

For example, the pier body with variable cross-section, because the slope ratio is very small, it is difficult to control the construction accurately, and the slight deviation of each section will cause a large cumulative error of the high pier, which will affect the force and appearance of the high pier

Images