泥石流拦砂坝排泄孔优化及其数值模拟研究
王小军; 陈晓清,; 谢湘平; 李昆
刊名科学技术与工程
2016
卷号16期号:9页码:28-34
关键词泥石流 拦砂坎 排泄孔 数值模拟 优化
ISSN号1671-1815
其他题名The Optimization of Debris Flow Check Dam Drainage Hole and Its Numerical Simulation Research
通讯作者陈晓清
中文摘要为改善拦砂坝排水孔堵塞问题,提出了以调节泥石流流量为主的排水孔优化策略;并通过数值模拟初步研究了横、纵断面形态对优化后的排水孔(排泄孔)排泄能力的影响,以及排泄孔对不同性质的泥石流的排泄效果。通过对横断面形态、纵断面形态及浆体容重三因子的正交组合,进行了80组模拟试验,以平均排泄流量珚Q和坝前泥深下降速率为主要评价指标,结果表明具有合理宽深比的矩形横断面相对最优。对容重较小的流体,窄深型的矩形断面排泄能力最好;而对高容重流体,则正方形断面相对更好。在可流动范围内,排泄效果随着排泄孔纵比降的增大而增大;而增大沿程排泄孔横断面截面积(变截面一坡到底喇叭型)可提高相同纵比降排泄孔的排泄能力。同时,随着流体容重的增加,排泄孔的排泄能力逐渐降低。 
英文摘要In order to improve the ability of drainage hole,an optimal strategy for drainage hole aimed to adjust outflow volume was proposed. Preliminary research including the influence of cross-section and transverse-section types to the drainage ability of drainage hole as well as the applicability to different type of fluid were carried out by numerical simulation. 80 modeling experiments were did under the orthogonal combination of 5 cross-section types, 4 longitudinal-section types and 4 fluid density conditions. Define average discharge volume 珚Q and descent rate of flow depth in front of dam as evaluating indexes,the results showed that rectangular cross-section with proper width
to length ratio promised a better effect than other types for all kind of fluid conditions,that is,smaller width to length ratio suit for lower density fluid and square cross-section for higher density fluid. The average descent rate of flow depth increased with the increase of longitudinal slope gradient of drainage hole as well as the enlarged crosssection
area along the longitudinal direction. The higher fluid density was the lower discharge ability of the drainage hole displayed.
学科主题P642.23
收录类别北大中文核心
语种中文
内容类型期刊论文
源URL[http://ir.imde.ac.cn/handle/131551/17494]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位1.中国科学院-水利部成都山地灾害与环境研究所/山地灾害与地表过程重点市实验室
2.中国科学院大学
推荐引用方式
GB/T 7714
王小军,陈晓清,,谢湘平,等. 泥石流拦砂坝排泄孔优化及其数值模拟研究[J]. 科学技术与工程,2016,16(9):28-34.
APA 王小军,陈晓清,,谢湘平,&李昆.(2016).泥石流拦砂坝排泄孔优化及其数值模拟研究.科学技术与工程,16(9),28-34.
MLA 王小军,et al."泥石流拦砂坝排泄孔优化及其数值模拟研究".科学技术与工程 16.9(2016):28-34.
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