Hanging mounting method of long heavy stay cable under space limited condition

Abstract

The invention discloses a hanging mounting method of a long heavy stay cable under a space limited condition. The hanging mounting method comprises mounting of a first stay cable body on the center span side of a cable tower and a second stay cable body on the side span side of the cable tower and comprises the following steps of S10, tower end mounting of the first stay cable body; S20, beam end mounting of the first stay cable body; S30, tower end hard traction of the first stay cable body; S40, tower end mounting of the second stay cable body; S50, beam end mounting of the second stay cable body; and S60, synchronous different-place tensioning. A tower-first beam-second hanging manner is adopted in the stay cable bodies on the center span side and the side span side for hanging, and the problems that in the beam-tower end hanging scheme of the long heavy stay cable, during rear-tower-end hanging, traction force is too large, and safety is poor are solved. Meanwhile, beam end and tower end synchronous different-place tensioning is adopted, the problems that upper tower column space is small and narrow, and construction is difficult are solved, the phenomenon that when the stay cable bodies are tensioned each time, a set of tensioning extending rods are cut to be wasted is avoided, material waste is reduced, and the construction cost is reduced.

Description

technical field [0001] The invention is used in the technical field of bridge construction, and in particular relates to a method for hanging and installing long and heavy stay cables under the condition of limited space. Background technique [0002] In the cable-stayed bridge, the structural member that bears the tension and serves as the main support of the main girder is difficult to construct because the two ends of the cable-stayed cables are hung at high altitude or near the sky or near the water. Guarantees are especially important. [0003] There are two conventional hanging methods for cable-stayed cables: "hanging on the tower first and then the beam" and "hanging on the beam first and then the tower". [0004] 1. The conventional cable-stayed cable "beam first and then tower hanging" scheme: After the cable-stayed cable is transported to the site, it is hoisted to the bridge deck by a tower crane or a floating crane or a large ground crane. The beam face car cr...

AI Technical Summary

Problems solved by technology

[0018] In order to solve the problem that the bridge deck space of long and heavy cable-stayed cables is not enough to spread the cables, and to avoid the problem of too much traction and unsafety when "hanging at the rear tower end" in the "beam first and then tower hanging" scheme of long and heavy cable-stayed cables, in order to solve The problem of insufficient soft traction space at the beam end of the steel box girder in the scheme of "hanging the tower first and then the beam" in the "hanging at the rear beam end" solution is to solve the problem of steel strand breakage and damage caused by the torsion of the long and heavy cable-stayed cable when the cable body is torsionally stretched. Problems and in order to solve the problem that the space of the upper tower column is narrow and difficult to construct when the cable stays are pulled synchronously and symmetrically, the present invention provides a method for hanging and installing long and heavy stay cables under the condition of limited space

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