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粘性泥流沟道内堆积特性的直槽概化模型试验分析

DOI: 10.13577/j.jnd.2015.0510, PP. 83-91

Keywords: 粘性泥流,堆积特性,概化模型,不等厚度假定,静力理论分析方法

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Abstract:

粘性泥流作为粘性泥石流这一山区最常见也是危害最大的泥石流类型的基质,其堆积特性在较大程度上可以反映粘性泥石流的运动规律。设计建造室内直槽概化模型试验台,反复开展了不同条件组合下的粘性泥流直槽堆积试验。试验结果进一步证实:粘性泥流在任意沟道坡度下均能发生堆积,堆积厚度沿程不等。基于不等厚度假定,应用一维静力理论分析方法导出了两种简单条件下粘性泥流的堆积形态曲线方程。经与模型试验及野外实测曲线对比,二者符合情况较好,所得方程可供预测粘性泥石流在天然沟道中的堆积范围提供参考。

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