Erection method of stiffening girder of suspension bridge and device thereof

Abstract

The invention discloses an erection method of a stiffening girder of a suspension bridge and a device thereof. The method comprises the following steps: 1) a track cable is erected below the position of a main cable of the suspension bridge; 2) a sling suspended on the main cable is taken as a middle suspension center of the track cable; 3) the middle suspension center is connected with the track cable by a saddle; 4) two ends of the track cable are arranged on anchorage systems at two banks; 5) a stiffening girder section is suspended by an overhead crane system supported on the track cable, and a traction system or a pushing system draws or pushes the overhead crane system to carry the stiffening girder section to a required position; and 6) the stiffening girder segment carried to the position is vertically lifted by a lifting device to be connected with the sling for achieving system transform. The method and the device have the obvious advantages of safe construction, cost saving, flexible and convenient operation, wide application range and the like, and help solve the problems of inconvenient transportation under a bridge in a mountainous area and hard stiffening girder erection of a super major suspension bridge in an area with extremely high vertical lifting height.

Description

technical field The invention belongs to bridge construction devices, in particular to a method and device for erecting a stiffening beam of a suspension bridge. Background technique There are two types of stiffening beam erection methods for suspension bridges, one is segmental erection, that is, the stiffening beam is divided into several segments, and all segments are pre-assembled or prefabricated in the assembly site, and then transported to the construction site for installation. It is installed section by section to complete the erection of stiffening beams; the other is the scattered erection of components, that is, the fabrication of stiffening beam components is completed on a dedicated site, and then the components are hung from both banks to the mid-span to gradually form a stiffening beam body. Thereby completing the stiffening beam erection. Stiffened beam members are transported to the cantilever end of the beam using the progressively formed beam as a channe...

AI Technical Summary

Problems solved by technology

The method and device can be used to solve the problem that the extra-long-span suspension bridges in areas with too large headroom under the bridge and inconvenient transportation use methods such as suspending assembly of parts, hoisting and installation under the bridge by a spanning cable crane, and transporting and installing the beam by a cable crane. erection puzzle