成昆铁路峨米段布觉依达沟泥石流风险评估  

Risk Assessment of Debris Flow in Bujueyida Gully of Emei-Miyi Section of Chengdu-Kunming Railway

作　　者：毛邦燕[1] 郑捷 李向东[1] 张广泽[1] 蒋良文[1] MAO Bangyan;ZHENG Jie;LI Xiangdong;ZHANG Guangze;JIANG Liangwen(China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 610031,China;Sichuan Huadi Construction Engineering Co.Ltd,Chengdu,Sichuan 610081,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]四川省华地建设工程有限责任公司,成都610081

出　　处：《铁道工程学报》2024年第12期40-44,共5页Journal of Railway Engineering Society

摘　　要：研究目的:布觉依达沟地处我国泥石流高易发区,新成昆和既有成昆铁路均从沟道下游通过,该沟在历史上曾多次暴发泥石流灾害,最近一次暴发泥石流事件为2024年,给沿沟道铁路工程带来严重的危害。开展布觉依达沟泥石流风险评估,对新成昆和既有成昆铁路的安全运营意义重大。研究结论:(1)成昆铁路峨眉至米易段布觉依达沟泥石流形成主要受地质构造、地形条件、水动力条件等多种因素影响,沟内主要的泥石流物源有崩滑堆积物、沟道堆积物等多种物源,可能参与泥石流活动的动储量为1.47×10^(5) m^(3);(2)采用单沟泥石流危险度评价公式对布觉依达沟泥石流的危险性进行了评价,评价结果为0.51分,属于中度危险程度;(3)创建了一种考虑承灾体价值、脆弱性指数和危险程度的泥石流单沟风险评估方法,并采用淤埋型和冲毁型两种模式分别进行了布觉依达沟泥石流风险等级评价,泥石流风险度分别为0.17和0.19,均为中度风险;(4)本研究结论对山区公路、铁路等交通工程泥石流风险评估及灾害整治具有指导意义。Research purposes:Bukuiyada Gully is located in a high-risk area for debris flow in China.Both the newly built and the existing Chengdu-Kunming Railway pass through the downstream of the gully.The gully has experienced multiple large-scale mudslide disasters in its history,with the most recent one occurring in 2024,posing serious hazards to railway engineering along the gully.It is of great significance to conduct a risk assessment of debris flow gullies in Bujueyida Gully in order to ensure the safety of newly built and the existing railway of Chengdu-Kunming Railway.Research conclusions:(1)The formation of debris flows in Bujueyida Gully of the Emei-Miyi section of Chengdu-Kunming Railway is mainly influenced by topographic conditions and hydrodynamic conditions.The loose solid material sources in the gully include landslide deposits,channel deposits,and other sources.The potential dynamic reserves involved in debris flow activity are 1.47×10^(5) m^(3).(2)The risk of debris flow in Bujueyida Gully is evaluated using a single gully debris flow risk assessment formula,with an evaluation score of 0.51,indicating moderate risk.(3)We have developed a risk assessment method for debris flow gullies that considers the value of the disaster bearing body,vulnerability index,and degree of danger.We have evaluated the risk level of debris flow in Bujueyida Gully by using two modes:siltation and erosion,with values of 0.17 and 0.19,respectively,both of which are moderate risks.(4)The research conclusions are of guiding significance to the risk assessment and disaster remediation of debris flows for highways and railways in mountainous areas.

关 键 词：成昆铁路 布觉依达沟 泥石流 易损性 风险评估 

分 类 号：P642.23[天文地球—工程地质学]