粘性泥石流产流机理探讨  

Investigation on the yield mechanism of viscous debris flows

作　　者：吴积善[1] 程尊兰[1] 耿学勇[1] 党超[1] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《泥沙研究》2007年第2期17-23,共7页Journal of Sediment Research

基　　金：国家自然科学基金资助项目(40371016);交通部西部交通建设科技项目(200431879255)

摘　　要：粘性泥石流产流是斜坡或沟床中粘粒含量较高的松散土体与入渗为主的水体结合,产生容重和起始静力分别大于1.8-1.9t/m3和30Pa的土水混合流。产流包括两个紧密相连的过程:含水量饱和或局部饱和土体的起动过程;动起后的流体化过程。本文首先阐述粘性泥石流产流的4种理想化情况及其相应的公式和4类流体化方式;然后结合泥石流活动的实际状况,提出粘性泥石流产流的4种常见类型,从而综合探讨粘性泥石流的产流机理。Viscous debris flows are saturated with loose earth on slopes or on gully beds, which are rich in clay and have a bulk density of 〉 1.8 - 1.9 t/m^3 and the static shear stress of 〉 30Pa. The yield of viscous debris flows consists of two successive processes： displacement of totally or partially saturated earth by infiltrated water, and successive liquidization. Four types of ideal displacement processes and relevant four types of liqudization processes for viscous debris flow yield are firstly introducted in this paper, and then based on actual conditions of debris flow activities, four types of common processes for viscous debris flow yield are proposed for comprehensive approaches to the mechanism of viscous debris flow yield.

关 键 词：粘性泥石流 产流 机理 探讨 

分 类 号：TV144[水利工程—水力学及河流动力学]