【摘要】 成兰铁路沿线,近百年经历了3次大地震,特别是2008年"5·12"汶川地震作用非常明显,由于崩塌、错落、危岩落石、滑坡等不良地质,形成了众多泥石流沟。泥石流具有多发性,破坏力强,对铁路设计影响巨大。文章根据各段线路泥石流成因和分布特征,采取了不同的防治对策,对于大型泥石流,选线阶段采取绕避或隧道深埋躲避通过;对于中小型泥石流沟,采取大跨桥梁跨越、拦挡、疏导、设置防护墩、预警系统等综合整治工程措施,降低综合投资,减少安全隐患,确保铁路安全。更多还原

【Abstract】 Along Chengdu-Lanzhou railway, three severe earthquakes occurred in the recent hundred years, especially "5·12" Wenchuan great earthquake in 2008 induced many unfavorable geologic phenomena such as collapse, dangerous rock, rockfall and landslide as well as debris flow, which possesses the characteristics of strong damaging force with high frequency, having adverse influence on railway design. According to the cause and distribution characteristics of debris flow, different prevention measures are put forward in this paper, for the big debris flow, the route selection adopts detouring or deeply buried tunnel; for the small and medium-sized debris flow, such comprehensive engineering measures as long-span bridge for crossing, blocking and dredging, setting protective pier and pre-warning system, etc. to reduce the overall investment, decrease potential safety hazard and ensure the railway safety.更多还原