该【冰碛补给型泥石流形成机制研究——以贡嘎山东坡小河子沟为例 】是由【niuww】上传分享，文档一共【2】页，该文档可以免费在线阅读，需要了解更多关于【冰碛补给型泥石流形成机制研究——以贡嘎山东坡小河子沟为例 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。冰碛补给型泥石流形成机制研究——以贡嘎山东坡小河子沟为例 摘要 贡嘎山东坡小河子沟是一个典型的冰碛补给型泥石流发生地，本文采用野外调研和室内实验相结合的方法，研究了小河子沟泥石流的形成机制。通过野外调研发现，小河子沟发生泥石流的主要原因是冰碛。冰碛是由于冰体在山体裂隙中流动或滑移而产生的碎石和土壤，它们会随着冰体的运动进入山谷，形成泥石流。 在室内实验中，使用了滚筒试验模拟冰碛垮塌和泥石流流动过程。实验发现，冰碛垮塌后，碎石和土壤随着冰体的运动不断摩擦和碾压，形成了泥石流。同时，实验也发现，泥石流的流速和含沙量与冰碛的垮塌速度和垮塌量有着密切的关系，冰碛垮塌速度和垮塌量越大，则泥石流的流速和含沙量也越大。 综上所述，贡嘎山东坡小河子沟的泥石流是由冰碛垮塌引起的，冰碛的垮塌速度和垮塌量决定了泥石流的流速和含沙量。这一研究结果对于泥石流的预防和治理具有重要的指导意义。 关键词：冰碛补给型泥石流；发生机制；滚筒试验；垮塌速度；垮塌量；流速；含沙量 Abstract Xiaohuzigou on the eastern slope of Mount Gongga is a typical site of ice-carrying and debris input type mudflow. In this paper, we studied the formation mechanism of mudflow in Xiaohuzigou by combining field investigation and laboratory experiments. Through field investigation, we found that the main reason for the mudflow in Xiaohuzigou was due to ice-carrying. Ice-carrying is the result of the movement or sliding of ice bodies in the cracks of mountains, and they will enter the valley with the movement of ice bodies, forming mudflow. In laboratory experiments, drum tests were used to simulate the process of ice collapse and mudflow. The experiment found that after the ice collapse, the gravel and soil were constantly rubbed and compressed with the movement of the ice body, forming mudflow. At the same time, the experiment also found that the flow rate and sediment concentration of the mudflow had a close relationship with the speed and amount of the ice collapse. The larger the speed and amount of ice collapse, the greater the flow rate and sediment concentration of the mudflow. In summary, the mudflow in Xiaohuzigou on the eastern slope of Mount Gongga is caused by ice collapse, and the speed and amount of ice collapse determine the flow rate and sediment concentration of the mudflow. These research results have important guiding significance for the prevention and control of mudflow. Keywords: ice-carrying and debris input type mudflow; formation mechanism; drum test; speed of collapse; amount of collapse; flow rate; sediment concentration.
