万州大桥柔性薄壁墩填土卸载控制技术研究  

Study on Filling Unloading Control Technology of Flexible Thin-walled Pier of Wanzhou Bridge

作　　者：刘芳平[1] 何泽平[1] 周建庭[2] 官应煜 

机构地区：[1]重庆三峡学院土木工程学院,重庆404100 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《施工技术》2014年第23期65-68,共4页Construction Technology

基　　金：国家自然科学基金项目(51278512);重庆市教委科学技术研究项目(KJ1401024)

摘　　要：柔性薄壁墩在周围填土卸载过程中变形过大会失去稳定性,导致桥梁结构发生突然垮塌,引发安全事故。以万州大桥7号墩为研究对象,在卸载桥墩周围填土过程中监控桥墩变形,采用现场监测、理论分析、ANSYS有限元数值模拟相结合的方法控制桥墩变形、提前预测合理的卸载方式,防止桥梁安全事故发生。结果表明:该方法能够有效控制桥墩变形、指导桥墩周围填土卸载,避免发生安全事故。The excessive deformation of flexible thin-walled pier in the process of filling unloading may lead to pier instable,make a sudden collapse of the bridge structure. This paper takes pier No. 7 of Wanzhou Bridge as research subject,whose deformation was monitored during the filling unloading process. A combination of the methods including on-site monitoring,theoretical analysis and ANSYS finite element numerical simulation was used to control the deformation of the pier and predict reasonable way of unloading in advance,so as to prevent the accidents from bridge. The results show that the method can effectively control the deformation of the pier,guide filling around unloading and avoid accidents.

关 键 词：桥梁工程 连续刚构桥 桥墩 变形 数值模拟 监测 

分 类 号：U448.23[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]