摘要
拟建九—绵高速公路通过四川省平武县木座乡鲁家沟泥石流堆积扇,经调查对拟建高速公路具有危险性。本文通过对鲁家沟泥石流灾害的现场调查,从物源、地形地貌、水动力条件入手,分析了鲁家沟泥石流灾害的基本特征和形成机制:鲁家沟内基岩风化严重,坡积物丰富,共计有松散固体物源量约6.308 7×106m3,雨量充沛,平均纵坡降424‰,水动力作用强,鲁家沟是在暴雨作用下,顺层斜坡失稳破坏,堰塞沟道并溃决形成的泥石流。本文对鲁家沟泥石流做RAMMS:DEBRIS FLOW数值模拟研究得出:在50年一遇的频率下,泥石流冲出量为5.68×105m3,为防治工程设计提供一定依据。
Jiumian expressway cuts through the debris flow fan in Lujiagou,Muzuo township,Pingwu county,Sichuan province and it is dangerous for the proposed expressway. This paper,according to the field investigation of the debris flow disaster of Lujiagou and based on the topography,provenance and hydrodynamic conditions of debris flow,analyzed the characteristics and causes of debris flow disaster： Lujiagou internal bedrock weathering is very serious,the total amount of loose solids is about 6. 308 7 × 10^6 m^3. The area is abundant in rainfall,the average longitudinal grade is 424‰,and hydrodynamic force is strong. Under the influence of rainstorm,the bedding slope lost stabiity,collapsed into the valley and blocked the channel,then the barrier lake broke and formed the debris flow. In this paper,the RAMMS： DEBRIS FLOW numerical simulation of Lujiagou debris flow shows that： run-out amount of the debris flow is 5. 68 × 10^5 m^3 at the frequency of per 50 years. this study provide a basis for the prevention and control of engineering design.
作者
宋兵
沈军辉
阮壮
李本松
罗恒
李颖
SONG Bing;SHEN Junhui;RUAN Zhuang;LI Bensong;LUO Heng;LI Ying(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection （ Chengdu University of Technology） , Chengdu, Sichuan 610059, China)
出处
《中国地质灾害与防治学报》
CSCD
2018年第3期25-30,共6页
The Chinese Journal of Geological Hazard and Control
关键词
九—绵高速
鲁家沟
泥石流
堰塞体
数值模拟
形成机理
Jiuzhaogou-Mianyuan Expressway
Lujiagou
debris flow
barrier dam
numerical simulation
forming mechanism
