A construction method using side-span compression tower cable as back cable of buckle system

Abstract

The invention provides a construction method using a side-span pressure tower cable as a back cable of a buckling and hanging system, solves the problems of material consumption increase, anchor box layout difficulty and tedious operation caused by the repetition of some functions in the design of conventional cable lifting tower cable and buckling system as an independent system. The operating steps include: (1) installing the cable hoisting system; (2) Installing 1st-(N-1)th section of arch rib; (3) Installing N-section arch rib; (4) restoring the tower cable to its initial state. Back cableof the pressure tow cable is directly used as the back cable of the last arch rib segment buckle and hanging system, one back cable can be reduced compared with the conventional "one buckle and one hanging" structure system, the consumption of the steel strand of the back cable is greatly reduced, and the engineering cost is saved; and the back cable of the pressure tower cable is directly used as the back cable of the last arch rib segment buckling and hanging system. The construction method saves a buckle cable installation process, speeds up the construction period of the project, reducesthe risk of high-altitude operation. A single tow column reduces a back cable anchor box, saves the space of the cable tower, reduces the load of the cable tower, and increases the reliability of thestructure.

Description

technical field [0001] The invention relates to the field of arch bridge construction, in particular to a construction method using side-span compression tower cables as back cables of a fastening system. Background technique [0002] In the construction of top-supported or intermediate-supported arch bridges, the structural form of integrated suspension and buckle is usually adopted, so the pressing tower cable and the buckling and hanging system are all set on the same tower column. According to the structural finite element analysis and the actual measurement data of arch bridge construction in the past, with the continuous installation of the buckle and hanger system, the absolute deviation of the tower top is continuously reduced under the same hoisting condition, but due to the pressure of the tower cable and the buckle and hanger The functions of the systems are different, and they are usually considered as independent systems in the design of arch bridge schemes. Th...

AI Technical Summary

Problems solved by technology

[0003] Therefore, in order to solve the above-mentioned deficiencies, the present invention hereby provides a construction method that utilizes side-span pressing tower cables as back cables of the fastening system; Due to the duplication of some of its functions, it leads to the increase of material consumption, difficulties in the arrangement of anchor boxes and cumbersome operations

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