【作者】 黄浚鸣； 介玉新；

【Author】 HUANG Jun-ming;JIE Yu-xin;Institute of geotechnical engineering, Department of Hydraulic Engineering, Tsinghua University;

【机构】 水沙科学与水利水电工程国家重点实验室(清华大学)；

【摘要】 人工阶梯-深潭系统在西部山区的碎屑流灾害防治中卓有成效,但目前人工阶梯-深潭结构布置并没有科学有效的指导规范,因此有必要研究人工阶梯-深潭的最优结构形式。本文采用物质点方法对不同结构形式的阶梯-深潭系统进行研究。结果表明,阶梯-深潭结构按尺寸从大到小排布的消能效果优于从小到大排布;阶梯-深潭结构高度渐进变化的排列形式要优于突变形式;按照"大-小-大"间隔排列的阶梯-深潭系统具有最佳的消能效果。在阶梯-深潭对碎屑流的消能过程中,阶梯的拦截作用更为重要,较早拦截物源对于后续减灾具有积极作用。更多还原

【Abstract】 The artificial step-pool is very effective against debris flow hazards in the mountainous areas, but there is no scientific and effective guidance standard for the construction of the artificial step-pool at present. Therefore, it is necessary to research the optimal form of artificial step-pool. In this thesis, the material point method is adopted to research the step-pool with different structure forms. The research results show that the combination of stepwise changing step-pool size is better than that of abrupt changing step-pool size; compared with the combination of step-pool units arranged from small to large, the combination of step-pool units arranged from large to small has better energy dissipation effect. The energy dissipation effect of step-pool unit is superior to the other four combinations according to the large-small-large principle interval arrangement. To sum up, the interception is more important for the energy dissipation of debris flow. It can intercept the source earlier and play a positive role in the subsequent hazards reduction.更多还原