邓检良, 张向霞, 黄凤荣. 2019: 基于旋转水槽试验的水下泥石流块状物体输运机理研究. 工程地质学报, 27(s1): 251-256. DOI: 10.13544/j.cnki.jeg.2019098
    引用本文: 邓检良, 张向霞, 黄凤荣. 2019: 基于旋转水槽试验的水下泥石流块状物体输运机理研究. 工程地质学报, 27(s1): 251-256. DOI: 10.13544/j.cnki.jeg.2019098
    DENG Jianliang, ZHANG Xiangxia, HUANG Fengrong. 2019: STUDY ON TRANSPORT MECHANISM OF BLOCKS BY SUBAQUEOUS DEBRIS FLOW IN ROTATING FLUME TEST. JOURNAL OF ENGINEERING GEOLOGY, 27(s1): 251-256. DOI: 10.13544/j.cnki.jeg.2019098
    Citation: DENG Jianliang, ZHANG Xiangxia, HUANG Fengrong. 2019: STUDY ON TRANSPORT MECHANISM OF BLOCKS BY SUBAQUEOUS DEBRIS FLOW IN ROTATING FLUME TEST. JOURNAL OF ENGINEERING GEOLOGY, 27(s1): 251-256. DOI: 10.13544/j.cnki.jeg.2019098

    基于旋转水槽试验的水下泥石流块状物体输运机理研究

    STUDY ON TRANSPORT MECHANISM OF BLOCKS BY SUBAQUEOUS DEBRIS FLOW IN ROTATING FLUME TEST

    • 摘要: 水下泥石流及其巨大的块体输运能力引起了广泛的关注。本研究使用自主研发的旋转水槽制作稳定循环流动的水下泥石流,实测了水下泥石流输运块状体:采用300目的硅砂,制作了水下泥石流;采用石英岩块、PVC块体、玻璃珠等块状体,观测泥石流内部的块体输运现象。观测结果证实,水下泥石流可将块状体输运至龙头附近,且输运结果与水下泥石流和块状体自身性质均有关:块体密度低于密度流密度的条件下,块体可能被运送到龙头位置;如果块体密度远大于密度流密度,那么块体只能处于龙尾或者中部位置,始终不能到达龙头位置;块体在水下泥石流中运动的稳定性与块体的厚度相关。考虑密集流的速率、块体的密度、块体的形状尺寸等因素,分析了水下泥石流对块体的输运机理。

       

      Abstract: The subaqueous debris flow and its huge block transport capacity have attracted wide attention. In this study, a self-developed rotating flume was used to make a stable circulating subaqueous debris flow, and the location of transported block in subaqueous debris flow was measured. The 300-mesh silica sand was used to make the subaqueous debris flow; the blocks such as quartz rock block, PVC block and glass bead was used to observe the transport phenomenon. The observations confirmed that the subaqueous debris flow can transport the block to the vicinity of the head, and the transport capacity is related to the underwater debris flow and the nature of the block:ifthe bulk density is lower than the dense flow density, the subaqueous debris flow can transport the block to the head position; if the bulk density is much larger than the dense flow density, then the block can only be in the tail or middle location of dense flow, always unable to reach the head position; the stability of the block motion in the subaqueous debris flow is related to the thickness of the block. Considering the effects of dense flow rate, density of the block and size of the block, the transport mechanism of blocks by subaqueous debris flow in rotating flume test was proposed.

       

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