论文部分内容阅读
“5.12”地震形成的滑坡崩塌为泥石流提供了丰富的固体松散物质,严重威胁到交通、民房和安置点等的安全[1、2],成为灾区重建的重大隐患。本文以四川省绵竹市龙形沟泥石流为例,讨论5.12地震引发潜在泥石流地质灾害的调查评价方法。龙形沟流域属高山峡谷地貌,呈叶状,支沟众多,主沟未暴发过泥石流,但“5.12”地震后,现场调查发现流域内多达9条支沟暴发了泥石流。本文针对该类潜在泥石流沟谷的特点,在野外工作的基础上,分析其易发程度和发展趋势,计算其容重、流速、流量和冲击力等特征参数,对该类潜在泥石流沟谷的调查和防治具有一定实际意义。
The landslide collapse caused by the “5.12” earthquake has provided rich solid loose material to the debris flow and threatens the safety of traffic, houses and settlements [1, 2] and has become a major hidden danger in the reconstruction of the disaster area. In this paper, Longshagou debris flow in Mianzhu City, Sichuan Province is taken as an example to discuss the investigation and evaluation method of geological disasters caused by 5.12 earthquake. Longxinggou valley belongs to alpine valley landform, leafy, numerous branch ditches, the main groove has not triggered debris flow, but “5.12 ” after the earthquake, on-site survey found that up to 9 branch ditch within the basin outbreak of debris flow. Based on the field work, this paper analyzes the characteristics of potential debris flow valleys and its development trend, and calculates the parameters such as bulk density, flow rate, flow rate and impact force, investigates and prevents such potential debris flow valleys Has some practical significance.