黏性泥石流浆体对拦砂坝冲击规律研究

发布时间：2018-06-26 08:52

本文选题：拦砂坝 + 泥石流冲击力　；参考：《人民黄河》2017年03期

【摘要】：泥石流冲击力是拦砂坝发生冲击破坏的主要原因,研究泥石流对拦砂坝的冲击力,可为防止拦砂坝发生冲击破坏及拦砂坝结构优化设计提供数据和技术支撑。影响泥石流冲击力的因素众多且各因素影响程度不同,选取泥石流浆体容重、排导槽坡度、排导槽进口泥深3个主要因素进行了敏感性分析;分别对3个因素设立3个水平,运用正交试验设计原理,确立9组试验方案,分别进行数值模拟,以关键点泥石流最大冲击力为评价指标,基于试验结果,运用极差分析和方差分析对以上因素进行了分析;对泥石流浆体及块石冲击作用下拦砂坝的动力响应进行了相关数值模拟。结果表明:排导槽坡度为影响冲击力大小最显著的因素,其次为排导槽进口泥深、泥石流容重;泥石流浆体会对整个坝体产生冲击作用,而块石仅对坝体局部产生影响。
[Abstract]:The impact force of debris flow is the main reason for the impact failure of sand bar dam. Studying the impact force of debris flow on sand bar dam can provide data and technical support for preventing the impact damage of sand bar dam and optimizing the structure design of sand bar dam. There are many factors affecting the impact force of debris flow and the influence degree of each factor is different. Three main factors, including bulk density of debris flow slurry, slope of drainage channel and inlet mud depth of drainage channel, are selected for sensitivity analysis, and 3 levels are set up for each of the three factors. According to the principle of orthogonal test design, nine groups of test schemes were established, respectively, and the maximum impact force of debris flow at key points was taken as the evaluation index. Based on the test results, the above factors were analyzed by means of range analysis and variance analysis. The dynamic response of sand bar under the impact of debris flow slurry and rock block is numerically simulated. The results show that the slope of the drainage channel is the most significant factor affecting the impact force, followed by the inlet mud depth of the drainage channel, the bulk density of debris flow, the impact of debris flow slurry on the whole dam body, and the impact of rock block on the local part of the dam body.
【作者单位】：临沂大学土木工程与建筑学院;中国科学院成都山地灾害与环境研究所;
【基金】：“十二五”国家科技支撑计划项目(2014BAL05B01) 中国科学院重点部署项目(KZZD-EW-05-01)
【分类号】：P642.23

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