基于安全控制的通航河流双曲拱桥拆除方案分析

Analysis on Demolition Scheme of Double-curved Arch Bridge in Navigable River Based on Security Control

随着早期修建的双曲拱桥使用时间的增长,很多双曲拱桥出现了较大程度的破损或因承载能力达不到现代交通需求,成为交通的瓶颈,急需拆除重建。从双曲拱桥的受力特性分析着手,进行了双曲拱桥倒拆法及整体拆除法不同拆除方案的对比分析,并基于通航河流双曲拱桥拆除过程中结构自身稳定性、通航需求以及拆除作业的安全控制,进行了各种拆除方案的安全分析,可为类似工程的拆除方案优化提供借鉴和参考。

With the use of time increment of double-curved arch bridge early built, many double-curved arch bridges are greatly damaged or the carrying capacity can not be up to modern traffic demand. These bridges become the traffic bottlenecks and are urgently demolished to rebuild. According to the analysis of stress characteristics of double-curved arch bridge, the article compares and analyzes the different demolition schemes of double-curved arch bridge by the inverted demolition method and the overall demolition method.Based on the structure stability itself, navigable demand and security control in the demolition of double-curved arch bridge in navigable river, the article analyzes the securities of various demolition schemes,which can be referred for the optimization of demolition scheme of the similar projects.