Construction process of cable crane hoisting system

Abstract

The invention discloses a construction process of a cable crane hoisting system, and belongs to the field of bridges. The construction process comprises the following steps of step (1), respectively carrying out the construction of foundation embedded parts of towers on both sides on transition piers on both sides of a bridge, and then assembling the towers on both sides and installing wind cableson the corresponding towers; step (2), installing cable saddles on the tops of the towers on both sides, and carrying out the construction of main anchors on both sides; step (3), installing a main bearing cable and installing a winch at the same time; step (4), carrying out the installation of a lifting trolley, a traction rope and a hoisting rope; and step (5), carrying out hoisting system inspection and trial hoisting. According to the scheme of the invention, the towers are erected on the tops of the bridge transition piers, the span of a cable system is reduced and the height of the towers is reduced; and the arrangement not only greatly saves the construction cost and speeds up the construction progress, but also ensures the construction safety of a cable crane used in a large-span,variable cross-section steel truss continuous rigid frame bridge, and the hoisting construction process is simple.

Description

technical field [0001] The invention relates to the technical field of bridge construction, and more specifically, relates to a construction technique of a cable crane hoisting system. Background technique [0002] Due to the large-span variable cross-section steel truss girder continuous rigid frame bridge has a large spanning capacity and a light superstructure, it is a reasonable bridge structure form for crossing deep trenches, canyons and rivers. However, due to terrain constraints, these bridges are often difficult to install with large cranes, and it is even more difficult for large transport vehicles to reach each construction work surface. [0003] The current traditional construction technology of continuous rigid frame bridges at home and abroad generally adopts the push (drag) method and the cantilever assembly method of the bridge deck crane; for long-span steel truss bridges, if the cantilever is too large It is necessary to set up temporary buttresses between...

AI Technical Summary

Problems solved by technology

Factors such as variable cross-section steel truss girders, long approach bridges, and their location on curves determine that traditional construction methods such as jacking are not suitable for the installation of main girders. Even if jacking methods can be used, bridges in mountainous areas do not have rear balance sections assembled At the same time, it is very difficult to set up temporary buttresses; if the bridge deck crane is used for cantilever assembly construction, the weight of the bridge deck crane will not only increase the force on the pier-beam junction, but also the components will be transported horizontally and vertically from the assembly site to the construction work surface also very difficult

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