Accurate positioning method for cable-stayed bridge pylon cable guide pipe

Abstract

The invention relates to an accurate positioning method for a cable-stayed bridge pylon cable guide pipe, which comprises the following steps of: processing a steel inner die firstly and carrying out trial assembly on a cable guide pipe on the processed steel inner die; after the cable guide pipe reaches preset installation accuracy, calibrating the installation position of the cable guide pipe on the steel inner die and then disassembling the cable guide pipe; when a pylon cable area is constructed, lifting and fixing the steel inner die in place; and then mounting the cable guide pipe on the fixed steel inner die according to the position calibrated during trial assembly and welding and fixing the cable guide pipe. The invention converts the air positioning of a complicated cable guide pipe pylon into land factory positioning, can ensure the positioning accuracy of the cable guide pipe, simplifies the working procedure and shortens the construction period.

Description

technical field [0001] The invention relates to a method for installing a bridge cable duct, in particular to a precise positioning method for a cable duct of a tower column of a cable-stayed bridge, which can improve the positioning accuracy of the cable duct and shorten the construction period. Background technique [0002] The cable-stayed cable is the load-bearing system of the main beam of the cable-stayed bridge. See figure 1 As shown, the stay cable is guided out by a cable conduit 2 embedded in the reinforced concrete tower column 1, and the cable conduit 2 consists of a steel casing 21 and a steel casing 21 fixed at one end of the steel casing and perpendicular to the steel casing. The anchor plate 22 is formed. During the construction of the tower column 1, the positioning accuracy of the cable guide 2 is extremely high, because the positioning accuracy of the cable guide determines the construction quality of the stay cable and directly affects the stress of the...

AI Technical Summary

Problems solved by technology

Since tower column construction is a high-altitude operation, the construction space is narrow, especially for leaning tower columns, and it is very difficult to locate on the cable guide tower. The pressure of the conduit and other embedded parts affects each other, which directly increases the difficulty of precise positioning of the cable conduit. In addition, cutting and adjusting the cable conduit during the construction of the tower column will also increase the construction time of the tower column and affect the construction progress.

Images