尼泊尔卡贝利水电站泄洪冲沙闸闸基渗流分析方法探讨  

Analysis methods for seepage of flood and sediment discharge sluice foundation of Nepal Kabeli Hydropower Station

作　　者：岳竹 肖钰 YUE Zhu;XIAO Yu(Hangzhou Design Institute of Water Conservancy and Hydropower Co.,Ltd.,Hangzhou 310006,China;Zhejiang Design Institute of Water Conservancy and Hydroelectric Power,Hangzhou 310002,China)

机构地区：[1]杭州水利水电勘测设计院有限公司,浙江杭州310006 [2]浙江省水利水电勘测设计院,浙江杭州310002

出　　处：《水利水电快报》2020年第6期46-51,共6页Express Water Resources & Hydropower Information

摘　　要：水闸基础渗流分析是水闸设计的重要内容。目前,国内外关于土基上小型水闸基底渗流的分析方法主要有改进阻力系数法、分段法、有限元法等。以尼泊尔卡贝利(Kabeli)引水式水电站工程水闸为例,采用上述3种方法对该工程闸坝进行渗流分析。结果表明:闸坝出口段渗透坡降小于允许渗透坡降,满足渗透稳定要求,渗漏量在可接受范围内。通过与实际监测数据对比分析,改进阻力系数法计算成果与有限元计算成果更接近,更符合实际,而分段法计算得到的出口段渗透坡降相对偏小;相较于分段法,改进阻力系数法更适用于深厚覆盖层基础上小型水闸的渗流计算分析。Analyzing seepage flow of sluice foundation is an important part of sluice design.The commonly used methods for analyzing foundation seepage of small sluice on earth foundation are Improved Resistance Coefficient Method,Pavlovsky Segmentation Method,and Finite Element Method.Taking the sluice of Nepal Kabeli Hydropow⁃er Station as an example,we analyzed dam seepage using the three methods.The results showed that the slope gradi⁃ent at the outlet section of the sluice is smaller than the allowable value and thus meets the requirement of seepage stability,and the amount of seepage flow is within the acceptable range.By comparing to the actual data,improved resistance coefficient method and finite element method tend to yield a similar result and more conformed to the practical condition,while Pavlovsky segmentation method yields a smaller value in slope gradient.Therefore,we conclude that improved resistance coefficient method is superior in calculating and analyzing the seepage flow of dam on deep overburden layer.

关 键 词：水闸基础 渗流分析 改进阻力系数法 巴甫洛夫斯基分段法 有限元法 卡贝利水电站 尼泊尔 

分 类 号：TV65[水利工程—水利水电工程]