Construction method of cast-in-place box girder based on composite mobile formwork

Abstract

The invention relates to a composite movable mold frame for a cast-in-situ box beam. The composite movable mold frame mainly comprises a corbel supporting bracket, a horizontal movement railway, pulley block platforms, longitudinal bailey beams, horizontal bailey beams, external mold brackets, horizontal movement platforms, horizontal movement jacks A, a longitudinal movement jack and horizontal movement jacks B, wherein the horizontal movement jacks A are arranged on the side surface of the pulley block platforms and the side surface of the horizontal movement railway, one ends of the horizontal movement jacks A are fixed on the pulley block platforms, and the other ends of the horizontal movement jacks A are fixed on the horizontal movement railway; the longitudinal movement jack is arranged under the longitudinal bailey beams in a longitudinal direction; a base of the longitudinal movement jack is fixed on the pulley block platforms, and the other end of the base is fixed on a longitudinal movement guide rail beam through a connecting fitting E; and the external mold brackets adopt a structure that two sides of the external mold bracket are in symmetry and separation, and bottom mold plates on two sides are fixed together through bolts. The structure of the composite movable mold frame disclosed by the invention is convenient to disassemble and assemble and high in construction efficiency, repeated disassembling of supports and mold frame structures is not needed, automated hole penetration of the movable mold frame and a main beam can be realized, the serial construction of the cast-in-situ box beam is realized, and good economic and technical benefits are achieved.

Description

technical field [0001] The invention relates to a composite mobile formwork for a cast-in-place box girder, which belongs to the field of building construction engineering, and in particular to a construction method for a cast-in-place box girder based on a composite mobile formwork. Background technique [0002] Prestressed concrete girder bridges occupy a dominant position in my country's small and medium-span bridges. In addition to the commonly used full pavement method of pouring hole by hole and whole hole prefabricated erection, the construction method also uses a large number of mobile formwork to pour hole by hole, which effectively promotes bridge construction. The mechanization process of construction. [0003] The traditional cast-in-place box girder supporting formwork has poor adaptability, low construction efficiency, and the formwork and formwork brackets need to be removed repeatedly. In order to adapt to the different structural systems and structural chara...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a cast-in-place box girder composite mobile formwork and its construction in view of the shortcomings of the traditional cast-in-place box girder support formwork, such as poor adaptability, low construction efficiency, and repeated removal of the formwork and formwork brackets. method, the cast-in-place box girder composite mobile formwork includes movable longitudinal Bailey beams, detachable formwork and formwork integrated mobile formwork, longitudinal and lateral movement tracks and other composite mobile formworks

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