粘性泥石流体的应力应变特性和流速参数的确定  

Stress-strain properties of viscous debris flow and determination of volocity parameter

作　　者：王裕宜[1] 詹钱登[2] 韩文亮[3] 洪勇[1] 邹仁元[4] 

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中国科学院东川泥石流观测研究站,四川成都610041 [2]台湾成功大学水利与海洋工程学系,台湾台南70101 [3]清华大学水利系,北京100083 [4]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：《中国地质灾害与防治学报》2003年第1期9-13,共5页The Chinese Journal of Geological Hazard and Control

基　　金：国家自然科学基金资助项目(40071010)

摘　　要：文章从粘性泥石流体的组成,应力应变特性和减阻作用的观测试验入手,揭示了粘性泥石流体运动的阻力特性,探讨了粘性泥石流流速公式中的曼宁糙率系数的表征。粘性泥石流体运动的阻力特性主要与沟槽特征以及泥深和粘附层流变特性有关。根据高、低不同阻力的粘性泥石流浆体的泥砂比,浆体介质的流变参数(ηp、τBf)和体积浓度(Cvf),可获得不同阻力介质状态下统一的阻力糙率系数与它们的相关式,以此来确定曼宁糙率系数。The paper firstly discussed the composition,stress\|strain properties and the reduction resistance of the viscous debris flow based on the experiments,demonstrated the resistance property of viscous debris flow movement,and discussed the coefficients of Manin′s rough in flow velocity formula of viscous debris flow.The resistance property is mainly related to the bed channel,depth and rheology of the adhesive layer.According to the ratio of silt to sand (Rnc, and the rheological properties (η\-p\,τBf) as well as volume densities (Cvf) of viscous debris flow in different resistance conditions,the resistance coefficients and their relative equations can be obtained so as to determine the Manin′s rough coefficients.

关 键 词：粘性泥石流 应力应变特性 流速公式 糙率系数 减阻作用 屈服应力 

分 类 号：P642.23[天文地球—工程地质学]