拱形棚洞受落石冲击的模型试验研究  

An experimental study on the performance of an arch shaped shed tunnel due to the impact of rockfall

作　　者：王爽[1] 周晓军[1] 罗福君[1] 姜波[2] 朱勇[2] WANG Shuang ZHOU Xiaojun LUO Fujun JIANG Bo ZHU Yong(Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China China Railway Eryuan Engineering Group Co. ,Ltd. , Chengdu 610031 , China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031 [2]中铁二院,成都610031

出　　处：《振动与冲击》2017年第12期215-222,共8页Journal of Vibration and Shock

基　　金：铁道部科技研究开发计划项目(2010G018-C-1-3)

摘　　要：通过室内模型试验对拱形棚洞抵抗落石冲击的力学性能进行了研究。重点分析了棚洞的拱圈、立柱和其内部钢筋在不同落石冲击能量、不同缓冲垫层厚度、不同冲击位置下的动力响应;分析了不同冲击工况下落石冲击力、拱形棚洞位移的变化规律;研究了拱形棚洞受落石冲击的破坏形态及其薄弱区域;并给出了相关加强措施和轻质土缓冲垫层的适宜厚度建议值。Model test was used to study the impact resistance of an arch shaped shed tunnel, which mainly analyzed the dynamic response rules of the arch, the upright column and the interior steel under diverse impact energy, cushion with diverse thickness, diverse impact locations. The rules of rockfall impact force and displacement of the arch shaped shed tunnel under diverse impacting condition were analyzed; Failure modes and weak area of the arch shaped shed tunnel were analyzed. The relative strengthening measures and appropriate thickness range of light soil cushion were given.

关 键 词：拱形棚洞 模型试验 落石冲击 轻质土 动力响应 

分 类 号：U25[交通运输工程—道路与铁道工程]