【摘要】 汶川8.0级地震后,在灾后重建的过程中,很多位于泥石流沟口堆积区的居民建筑、交通干线、临时设施等都不可避免会遭受到泥石流的威胁。不同泥石流沟堆积区两侧山脚的夹角都有所不同,其对泥石流在堆积区的淤埋情况也会有所影响。针对此种情况,开展了18组室内实验,探讨出山口山脚约束对泥石流淤埋的影响。实验结果表明,随着约束程度的加大,泥石流扇状地的淤埋宽度随之减小,淤埋长度和厚度随之而增大,泥石流淤埋危险有向下游推进的趋势。更多还原

【Abstract】 During the period of the reconstruction after the M8.0 Wenchuan earthquake,many residential buildings,main roads,temporary facilities,etc.in the debris flow accumulation areas are inevitably threatened by debris flows.Different angles of the mountain bottom in different debris flow accumulation areas have different influences on silting and burying situations in the accumulation areas caused by debris flows.Eighteen laboratory experiments are carried out accordingly to study the influence of mountain pass constraints at the foot of the mountain on debris flow silting and burying situations.It is shown that,with intensification of the constraint,the silting and burying width decreases while the silting and burying length and thickness increase in the debris flow fan-shaped area.So it shows a tendency of downstream extending of debris flow silting and burying.更多还原