四川松潘水沟墩沟泥石流成因和动力学特征及其对铁路工程的影响评价

The Shuigoudun debris flow cause of formation and dynamic characteristics for railway engineering hazard assessment

泥石流是山区常见的地质灾害之一,具有运动快速、暴发突然、能量巨大等特点。本文根据现场调查,分析了水沟墩沟泥石流形成条件、流域特征,计算了泥石流的容重、流速、流量、冲出量、淤积厚度等动力学参数,并对其危险性做了定量评价,总结了水沟墩沟泥石流对铁路工程危害模式"先冲-又淤-再冲"。提出了对水沟墩沟泥石流采用相关的减灾防灾措施,供铁路部门制定相应的泥石流防止对策,有益于对成兰铁路线的长远安全运行和服务提供科学保障。

Debris flow is one of the frequency geologic hazard in the mountains ,with quick movement, sudden out-break, tremendous energy and so on. Based on the field investigation in the Shuigoudun debris flow,authors analyzedthe causes of formation and basin characteristics ,then calculated the dynamic parameters such as bulk density, veloc-ity, discharge, transported sediment scale and deposition thickness , and the risk of debris flow was evaluated , sum-mary the Shuigoudun debris flow hazard model for Railway Engineering ＂first impulse-and silt-and then washed＂. Pro-posed to the Shuigoudun debris flow adopt relevant measures for disaster prevention and reduction, for the railway de-partments to formulate the corresponding debris flow preventing countermeasures, are beneficial to the long-term safeoperation and service of ChengLan railway providing a scientific guarantee.