Construction method for constructing double-limb hollow high-pier mould side hydraulic jacking creeping formwork and double-limb hollow high-pier

Abstract

Provided is a construction method for constructing a double-limb hollow high-pier mould side hydraulic jacking creeping formwork and a double-limb hollow high pier. The creeping formwork comprises an integral truss construction platform, a formwork system and a hydraulic jacking device. The integral truss construction platform is erected outside a double-limb concrete pier wall to be poured, the hydraulic jacking device is supported on the outer side of an outer formwork and simultaneously is jacked on the bottom surface of the integral truss construction platform to control the jacking of the integral truss construction platform, the formwork system consists of an inner formwork and the outer formwork which are connected through a draw rod, and a shear key is arranged at the plugging position of the outer formwork and the draw rod. In construction, the jacking of the integral truss construction platform is achieved through shear key transferring and track supporting, the inner formwork and the outer formwork are hoisted by a crane derrick mast to an upper-layer construction section through supporting of the integral truss construction platform, and the construction method has the advantages of being high in mechanization degree, good in safety, high in construction efficiency and the like and can be widely applied to concrete construction of the double-limb high pier bridges.

Description

Technical field [0001] The invention relates to a bridge pier climbing form construction device and method, in particular to a high bridge pier climbing form construction device and method. Background technique [0002] At present, there are two popular methods for the construction of hollow high piers in China, namely, the construction method of turning form or slip form. Turnover mode refers to the rise of the formwork as the concrete rises section by section, while the slip form refers to the single section sliding. The common feature of the two is the need to set up a supporting platform on the top of the pier, that is, a support rod is embedded on the top of the poured pier concrete to support the top operating platform, and the hanger and formwork system are suspended on the platform. However, due to the limitation of the stability of the support rods, the height of the general formwork can only be increased by about 1.5m at a time, and the construction speed is slow. Whe...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a double-leg hollow high pier mold side hydraulic jacking and climbing formwork and a double-leg hollow high pier construction method. To solve the existing mold turning system, a supporting platform needs to be set on the top of the pier, and the lifting height of a single section is relatively small. And the technical problem that it is labor-intensive and time-consuming to set up supporting embedded parts during the construction process and the construction efficiency is not high

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