山区高速公路梁式桥结构体系的选择

Selection of Highway Beam Bridge Structure System in Mountainous Area

对于桥墩高度较大的山区高速公路梁式桥,墩梁固结可以使墩柱的计算长度减小,提高墩身的稳定性,增大结构的安全储备,保证施工及运营期的安全;并且由于墩梁固结减少了支座,也降低了运营阶段支座更换的工作量。本文以万州至利川(重庆段)高速公路冉家坝大桥为背景,针对山区高速公路桥梁设计中的常见结构体系选择问题,分析和研究了墩梁固结对桥梁结构安全性的影响,为类似桥梁的设计提供经验参考。

As for mountainous highway beam bridges with higher pier, the pier beam consolidation can reduce the cal- culation length of the pier, improve the pier stability, increase the margin of safety for the structure to ensure safety during construction and operation period; and because the pier beam consolidation reduces the support, it also reduc- es the workload of bearing replacement in the operationa! phase. The Ranjiaba bridge of Wanzhou to Lichuan highway （in Chongqing section） was taken as the background, in view of the common structure system selection problem of highway bridge design in mountain area, this paper analyzed and studied the effect of the pier beam consolidation on bridge structure safety, providing reference for similar bridge design.