Damage of Highways Caused by Debris Flow and Disaster Prevention after Earthquake

doi:10.3969/j.issn.1674-0696.2014.02.18

Abstract

Abstract: The typical damage events of highways along rivers caused by debris flow in Wenchuan earthquake areas were studied. Four disasler models of highways along rivers caused hy debris flow were concluded , deposit , erosion , impact and damming-river. According 10 the phenomenon Ihat Ihe most serious damage 10 highways along rivers was caused by dammingriver by debris flow , the disaster prevention mode of making greatesl use of Ihe maximum capacity of canying sediment of Ihe main river was proposed. Based on the calculation equation of head 四water level and criteria of disaster at the opposite river bank caused by debris flow river-blocked , the method of determining the maximum capacity of canying sediment of main riv er was then presented.

Key words: environmental engineering, debris flow, areas after the earthquake, highway engineering, disaster model, disaster prevention model

摘要： 研究了汶川地震灾区泥石流损害线路工程的典型事件，归纳出泥石流对线路工程有4种危害模式：掩埋和淤积、冲刷、冲击、堵塞主河。基于泥石流堵塞主河对线路工程造成的危害最为严重的现象，提出了以“最大限度利用主河输移和容纳泥沙的能力”为指导的防灾对策，基于主河水位壅高值计算式和泥石流堵河异岸受灾判据，给出了主河最大容纳泥沙量的确定方法。

关键词: 环境工程, 泥石流, 震后灾区, 线路工程, 危害模式, 防灾模式

CLC Number:

Liu Cuirong, Yao Lingkan,Du Cui. Damage of Highways Caused by Debris Flow and Disaster Prevention after Earthquake[J]. Journal of Chongqing Jiaotong University(Natural Science), 2014, 33(2): 81-85.

刘翠容,姚令侃，杜翠. 震区泥石流对线路工程的危害及防灾对策研究[J]. 重庆交通大学学报（自然科学版）, 2014, 33(2): 81-85.

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