山区超大跨径拱桥缆索吊装系统设计研究

Design and Research on Cable Hoisting System of Oversized-span Arch Bridge in Mountainous Area

摘要:

山区拱桥常采用无支架缆索吊装斜拉扣挂法进行安装，缆索吊装系统的合理布置对整个工程的造价、工期及风险控制均有着重要的作用。结合苏坝特大桥独特的施工环境，拱肋安装采用吊、扣分离体系，受力明确；同时，充分利用现场地形地势条件并本着永临结合的思路，对吊、扣塔基础及锚固系统进行了巧妙设计，极大的节省了工期、降低了成本；此外，研发了无辅助措施自行式承索器系统，实现了承索器无动力行走，解决了绳索下垂、缠绕等问题。通过本文的系列研究，以期为山区大跨径拱桥缆索吊装系统设计与施工提供借鉴、参考。

Abstract:

The arch bridges in mountainous areas are often installed by the cable hoisting cable-stayed buckle-hanged method without supports. The reasonable arrangement of cable hoisting system plays an important role in the cost, construction period and risk control of the whole project. Combined with the unique construction environment of Suba Bridge, the arch rib is installed by the hoisting and buckle separation system. The stress is clear. At the same time, fully utilizing the site terrain conditions and based on the idea of permanent and temporary combination, the hoisting and buckle tower foundation and the anchoring system are cleverly designed to greatly save the construction period and reduce the cost. In addition, the system of self-propelled cable holder without auxiliary measures is developed, which realizes the non-power walking of cable holder and solves the problems of rope sagging and winding. Through a series of research, it is expected to provide reference for the design and construction of the cable hoisting system of the long-span arch bridge in mountainous areas.