A method of installing steel truss girders

Abstract

The invention relates to a steel truss girder installation method. Use floating cranes to install the side brackets on both sides of the main tower pier and the internode steel beams on the top of the pier; on the internode steel beams on the top of the pier, lay the girder crane walkway and install the girder crane; the crane will be transported to the bridge position After the new-type box-truss composite section to be installed is lifted, it is aligned and spliced ​​with the steel beams at the top of the pier to complete the installation of the new-type box-truss composite section unit; the crane walkway is inverted on the installed new-type box-truss composite section The crane moves forward to lift the new box-girder combination section to be installed at the bridge position, align and splicing with the installed new box-girder combination section; reciprocate in this way, use the crane walkway upside down, and the crane moves forward. Lifting and installation of all new box truss composite segments. The present invention replaces the on-site operations on the water with land factories, which reduces the risk of high-altitude operations with less on-site operations, and the steel truss girders have a short installation period, fast construction speed and high installation quality. The Yangtze River Bridge on Shanghai-Tong Railway adopts the present invention, and the erection of the main girder only takes 220 days.

Description

technical field [0001] The invention relates to a steel truss girder installation method Background technique [0002] For existing steel truss cable-stayed bridges, the main truss construction methods mainly include loose assembly, truss erection, and single-section overall erection. These construction methods use a large number of high-strength bolts to connect the site, and the main truss and the bridge deck also use a large number of welds to connect on site. With the increase of the span, the number of main truss members and bridge deck units increases dramatically, and the workload of on-site splicing is huge. [0003] The Yangtze River Bridge on the Shanghai-Nongtong Railway is located in the coastal area, and severe weather conditions occur from time to time. The Shanghai-Tongjiang Yangtze River Bridge is a major node project on the Shanghai-Tongtong Railway Project. The main bridge is a super-long-span cable-stayed bridge for both highway and railway, with a main ...

AI Technical Summary

Problems solved by technology

The main span of the bridge is super long, the main girder is super long, and the conventional installation technology is adopted. On the one hand, it cannot meet the needs of the construction period of the Shanghai-Tongtong Railway; on the other hand, it also greatly increases the risk of the construction process.

Images