论文部分内容阅读
双龙沟是嘉陵江上游支流白水江左岸的一条支沟,位于四川九寨沟县新城区,该沟曾发生过严重的泥石流灾害,近几年都会有中小规模泥石流发生,泥石流直接威胁到中下游村庄、公路、县城的安全。从双龙沟流域的地形地貌、地层岩性、气象水文等方面进行分析,双龙沟具备泥石流发生的条件,判断泥石流的发展趋势为易发、高频、危害性大。根据现场调查和室内分析,该沟物源以沟岸崩滑和沟床堆积物为主,粒径较粗,容重较大为1.63t/m3,属黏性泥石流。通过综合分析,提出了一套以稳、排、防为主,生物措施和预警预报为辅的防治方案。
Ssangyong ditch is a branch ditch on the left bank of Baishuijiang, an upper tributary of the Jialing River. It is located in the new urban area of Jiuzhaigou County, Sichuan Province. There have been serious debris flow hazards in recent years. Small and medium-sized debris flows have occurred in recent years. Debris flow directly threatens the middle and lower reaches of villages, , The safety of the county. According to the analysis of topography, stratigraphy lithology and meteorology and hydrology in Shuanglonggou watershed, Shuanglonggou has the conditions of occurrence of debris flow, and the tendency of debris flow is easy to develop, high frequency and harmful. According to the field investigation and indoor analysis, the source of the ditches is mainly ditched bank ditches and ditches of ditches, with a coarse grain size and a large bulk density of 1.63t / m3, which belongs to the viscous debris flow. Through a comprehensive analysis, we put forward a set of prevention and treatment programs that are supplemented by stability, platoon, prevention, biological measures and early warning.