拉林铁路隧道洞口高位高陡危岩体发育类型及风险评估  

Development Types and Risk Assessment of High-steep Dangerous Rock Mass at the Entrance of Lhasa-Linzhi Railway Tunnel

作　　者：宋国壮 张玉芳 SONG Guozhuang;ZHANG Yufang(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2021年第1期88-92,共5页Railway Engineering

基　　金：国家重点研发计划(2018YFC1504902);中国铁路总公司科技研究开发计划(P2018G001);中国国家铁路集团有限公司科技研究开发计划(N2020G052);云南省交通运输厅科技计划(云交科教2018-34,2018-35)。

摘　　要：通过现场调查、资料分析等手段,将拉林(拉萨—林芝)铁路沿线高位高陡危岩体发育类型划分为陡坡断崖裸露硬岩危岩体、破碎陡坡裸露硬岩危岩体、陡坡突兀硬岩危岩体及陡坡裸露软岩危岩体。根据诱发高位危岩体失稳的关键风险要素,制定了灾害发生可能性和严重程度评估指标及其分级标准,构建了适用于拉林铁路高位高陡危岩体灾害风险的定量评估技术体系。将该评估技术体系应用于江木拉隧道出口危岩体,结果表明该体系的工程适用性和可操作性良好。By means of field investigation and data analysis,the development types of high-steep dangerous rock masses along the Lhasa-Linzhi Railway were divided into four types:the exposed hard dangerous rock masses on steepslopes and cliffs,the exposed broken hard dangerous rock masses on steep-slopes,the abrupted hard dangerous rock masses on steep-slopes and the exposed soft dangerous rock masses on steep-slopes.According to the key risk factors that induce the instability of high-steep dangerous rock masses,assessment index and classification standard of disaster possibility and severity were formulated,and the quantitative assessment technology system for disaster risk of highsteep dangerous rock mass on Lhasa-Linzhi railway was constructed.The assessment technology system was applied to the dangerous rock mass at the exit of Jiangmula Tunnel,and the results showed that the system has good engineering applicability and operability.

关 键 词：山区铁路 风险评估 高位危岩体 崩塌落石 指标体系法 

分 类 号：TU457[建筑科学—岩土工程]