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泥石流沟内松散物质 (岩土体 )在降雨作用下 ,由吸水→强度衰减→蠕变而构成初始泥石流体 ,形成机制包括降雨冲击机制和吸水软化机制。初始泥石流体运动诱发沟岸冲蚀、沟底掏蚀而补给构成泥石流体 ,补给机制包括岸坡切割机制和沟床物质启动机制。构建了由粒径为 6 .31cm的均质颗粒固相和均质浆体的等效泥石流体 ,为泥石流运动及冲击机理研究奠定理论基础
Under the action of rainfall, loose material (rock and soil mass) in the debris flow ditch formed initial debris flow by water absorption → intensity decay → creep. The forming mechanism includes rainfall impact mechanism and water softening mechanism. The initial mud-rock fluid movement induced the erosion of the gully bank and the ditching at the bottom of the trench to replenish the debris fluid. The recharge mechanism included the mechanism of bank slope cutting and the material activation of the gully. The equivalent debris fluid consisting of solid particles and homogeneous slurry of 631 cm particle size was constructed, which laid the theoretical foundation for the study of debris flow movement and impact mechanism