IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitleThe Optimization of Debris Flow Check Dam Drainage Hole and Its Numerical Simulation Research
王小军; 陈晓清,; 谢湘平; 李昆
Corresponding Author陈晓清
Source Publication科学技术与工程
Other Abstract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。 
; 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.
Keyword泥石流 拦砂坎 排泄孔 数值模拟 优化
Subject AreaP642.23
Indexed By北大中文核心
Funding Organization国家科技支撑计划课题(2014BAL05B01) ; 中科院重点部署项目(KZZD-EW-05-01)
Document Type期刊论文
Recommended Citation
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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