宝台山隧道进出口危岩落石防治措施研究  

Research on Prevention and Control Measures of Rockfall at the Entrance of Baotaishan Tunnel

作　　者：张宏 ZHANG Hong(China Railway Lanzhou Group Co Ltd,Lanzhou Gansu 730030,China)

机构地区：[1]中国铁路兰州局集团有限公司建设部,甘肃兰州730030

出　　处：《铁路技术创新》2022年第5期6-11,共6页Railway Technical Innovation

摘　　要：基于中兰铁路(甘肃段)的危岩落石现场调查情况,以宝台山隧道为例,通过Rockfall软件研究不同落石轨迹,预测线下危岩落石的运动轨迹、动能、弹跳高度、落点位置等运动特征,并针对宝台山隧道提出安全合理的防治措施,确保铁路工程结构和运营安全。结果表明,对直立陡坡进行削坡后,同时采用锚杆框架梁防护与分级放坡建立拦石墙可以有效保护隧道洞口。Based on the field investigation of rockfall in the Gansu Section of Zhongwei-Lanzhou Railway,taking Baotaishan Tunnel as an example,this paper studies the movement trajectory,kinetic energy,bounce height,falling point position,and other movement characteristics of rockfall below various rockfall trajectory prediction lines by using rockfall software,and puts forward safe and reasonable prevention and control measures for Baotaishan Tunnel to ensure the safety of railway engineering structure and operation.The results show that the tunnel portal can be effectively protected by setting up a rock bolt frame beam after cutting the steep slope and meanwhile sloping in steps and building a rock cutoff wall.

关 键 词：宝台山隧道 危岩落石 防治措施 拦石墙 

分 类 号：U453.1[建筑科学—桥梁与隧道工程]