In-water old bridge cover beam demolition platform erecting method

Abstract

The invention relates to an old bridge demolition construction process, in particular to an in-water old bridge cover beam demolition platform erecting method, which comprises the following steps: S1, erecting a straining beam support; S2, erecting a platform main beam; S3, erecting a platform distribution beam; S4, lifting a platform support; S5, mounting a hoop; and S6, establishing an operation space. According to the method, the platform support is pre-assembled on the straining beam and then lifted to the bottom of the cover beam to be temporarily fixed, then the hoop is assembled on the top of the straining beam in the same mode, the straining beam is lifted to the designed height and then fixed through the high-strength bolt, and finally the platform support and the hoop are fixed, so that the platform is erected; the space on the straining beam is fully utilized, so that the erecting process of an old bridge cover beam dismantling platform in water is safe and rapid, the difficulty and danger that bolts penetrate through hoops in a suspended state for fixation are avoided, and safe and rapid erecting of the old bridge cover beam dismantling platform in water is achieved.

Description

technical field [0001] The invention relates to a construction technology for dismantling old bridges, in particular to a method for erecting a platform for dismantling old bridge cover beams in water. Background technique [0002] With the continuous development of the urban economy, the existing highway spans are gradually unable to meet the traffic demand, and the number of reconstruction and expansion projects on the existing highways is gradually increasing. Establish a construction platform at the location to provide construction personnel with an operating space to remove the cover beam. The current construction platform is generally composed of steel components and assembled hoops. When erecting, the hoop needs to be lifted to the bottom of the cover beam and close to the pier column The top position is installed, the hoop is clamped on the pier column, connected by bolts, and then the steel components are erected, bound and installed on the hoop to form a constructi...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the urban economy, the existing highway spans are gradually unable to meet the traffic demand, and the number of reconstruction and expansion projects on the existing highways is gradually increasing. Establish a construction platform at the location to provide construction personnel with an operating space to remove the cover beam. The current construction platform is generally composed of steel components and assembled hoops. When erecting, the hoop needs to be lifted to the bottom of the cover beam and close to the pier column The top position is installed, the hoop is clamped on the pier column, connected by bolts, and then the steel members are erected, bound and installed on the hoop to form a construction platform

[0003] However, since the pier columns of the old bridge in the water are located above the water, there is no ground support when installing the hoop, so hoisting equipment is required to lift the hoop into place, and the bolts are inserted in the suspended state of the hoop, which is dangerous and difficult to construct. Large, seriously affecting the construction progress

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problems of the difficulty in erecting the construction platform for the removal of the old bridge cover girder in the water, which is dangerous and difficult to construct, and affects the construction progress.

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