Long-span prefabricated box girder hydraulic taking and releasing internal mould

Abstract

The invention provides a long-span prefabricated box girder hydraulic taking and releasing internal mould which comprises a top mould and a plurality of lifting supporting devices arranged below the top mould; the two sides of the top mould are pivoted with side moulds correspondingly; the two side moulds and the top mould define a hollow structure with the bottom opened; a first hydraulic oil cylinder is connected between the top mould and each side mould; the first hydraulic oil cylinders can drive the side moulds to rotate towards or far from the top mould; each lifting supporting device comprises a travelling girder, a spandrel girder and a lifting hydraulic oil cylinder which is connected between the travelling girder and the spandrel girder; the spandrel girders are fixedly connectedwith the bottom surface of the top mould; the travelling girders are located below the spandrel girders; and the lifting hydraulic oil cylinders can drive the spandrel girders to move towards or farfrom the travelling girders. According to the long-span prefabricated box girder hydraulic taking and releasing internal mould, the rigidity in the length direction is improved effectively, so that the top mould is not prone to deformation in a long-span concrete pouring process.

Description

technical field [0001] The invention relates to the technical field of box girder production and manufacturing, in particular to a hydraulic retractable inner mold of a large-span prefabricated box girder. Background technique [0002] On the high-speed railway passenger dedicated line, in view of the high-standard requirements of high-speed traffic on the smoothness of the line, most road sections are spanned in the form of bridge structures, which makes the hollow prestressed box girders with full holes widely used. The prefabricated box girder hydraulic retractable inner mold is a pouring mold for solving the internal cavity of the prefabricated box girder during the concrete pouring process. However, due to the limitation of rigidity in the longitudinal direction, the hydraulic retractable internal formwork of prefabricated box girders used in the prior art is usually 32 meters or 24 meters to ensure that the top form does not deform during the concrete pouring process, ...

AI Technical Summary

Problems solved by technology

However, due to the limitation of rigidity in the longitudinal direction, the hydraulic retractable internal formwork of prefabricated box girders used in the prior art is usually 32 meters or 24 meters to ensure that the top form does not deform during the concrete pouring process, so it cannot be applied to high-speed railways Manufacture of large-span prefabricated box girder for passenger dedicated line

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