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作者利用可调坡水槽进行了松散崩塌土与水流掺混并形成泥石流的实验 ,观测了崩塌土运动距离及泥石流的形成过程 ,建立了崩塌土流高比的计算公式。讨论了松散崩塌土流动化形成泥石流的临界条件 ,提出松散崩塌土在一定纵坡下形成泥石流的水流掺混机理。实验中发现了一定形状的块状崩塌土与饱和度较高的下垫层之间存在超载孔隙水压力 ,超载孔隙水压力减轻了块体自重达到减阻的作用。从而 ,可以解释块体在泥石流表面快速滑行的原因
The authors used an adjustable slope tank to conduct tests of loosely collapsing soil and water flow to form a debris flow. The moving distance of collapsible soil and the formation of debris flow were observed, and the formula for calculating the ratio of collapse to soil flow was established. This paper discusses the critical conditions for the formation of debris flows caused by the fluidization of loosely collapsed soils and proposes a flow mixing mechanism of loosely collapsed soils that forms a debris flow under a certain longitudinal slope. In the experiment, it is found that overpressure pore water pressure exists between a certain shape of massive collapse soil and the higher saturation underburden, and the overload pore water pressure relieves the block weight to achieve the drag reduction effect. Thus, it is possible to explain the reason why the block slides rapidly on the surface of the debris flow