高浓度黏性泥石流堆积层理结构中筛积层和粗化层形成机理的研究  

A Study on Forming Mechanism of the Bedding Structure of the Gravel Accumulated at Surface, and Rough Bedding Structure in Deposits of Viscous Debris Flows with Hyperconcentration

作　　者：王裕宜[1] 詹钱登[2] 韩文亮[3] 邹仁元[4] 

机构地区：[1]中国科学院成都山地灾害与环境研究所中国科学院东川泥石流观测站,成都610041 [2]台湾国立成功大学水利和海洋工程系,台南70101 [3]清华大学水利系,北京100084 [4]中国科学院成都山地灾害与环境研究所,成都610041

出　　处：《沉积学报》2003年第2期205-210,共6页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目 (批准号 :40 0 710 10 )资助

摘　　要：根据高浓度黏性泥石流的观测资料 ,应用不同类型黏性泥石流的流变特性和流体结构的分类指标—流核比 ,对高浓度黏性泥石流堆积中的混杂层、筛积层和粗化层理结构进行了成因差异分析。侧重分析了砾石质点在高浓度黏性泥石流蠕动流场中作向上垂直运动的魏森伯效应 ,并在表面富集形成了筛积层的成因 ,及其它与粗化层结构的区别。According to observational data of viscous debris flows with hyper-concentration , distinct causes of formation for different graded bedding in debris flow deposits have been analyzed by use of its rheology and the ratio of flow plug . The paper specially analyzed that the gravel in squirm condition of hyper-concentration viscous flows would tend to have vertical motion due to the effect of Weissenberg , then they would form the bedding structure of the gravel accumulated at surface, and they are different from rough bedding structure.

关 键 词：黏性泥石流 堆积形态 层理结构 流变特性 流体结构 流核比 魏森伯效应 筛积层 粗化层 

分 类 号：P642.23[天文地球—工程地质学]