摘要
本文根据既往的研究成果，从塌土体运动及达到距离的角度。探讨了崩塌土体堵塞河道形成天然坝的必要条件，并提出了找出有可能形成天然坝河段的方法，然后针对横断面可近似于矩形的山地窄深河道，探讨了工春天然坝形成的机理及其天然坝纵断形状的计算模型。通过水槽试验结果与计算结果之比较证明了该计算模型是合理的。使用该计算并根据崩塌规模（崩塌土量，崩塌宽等）能简单地计算出天然坝的最大高度及坝基长等纵断形状参数。
According to the former research results, the formation condition of natural dam caused by massive movement of slope failure was discussed from the viewpoints of the movement of failure blockage and the reached distance in this paper. Also, the method to find the place where the natural dam may be formed was proposed. In the case of the mountainous narrow-deep river channel where the cross-section may be approximated into rectangle, the formation mechanism of natural dam was illustrated, and the prediction method of the profile shape was given. It was proved that the calculation model of dam shape is rational by comparison of calculated and experimental results. The dam factors (the maximum height and the length of dam-base) can be carried out easily from the slope failure scales (the volume and the width) by this method. This provides a basis for predicting the flood and debris flow caused by dam-break.
出处
《泥沙研究》
CSCD
北大核心
1994年第3期50-59,共10页
Journal of Sediment Research
