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.
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)
出处
《水利水电快报》
2020年第6期46-51,共6页
Express Water Resources & Hydropower Information
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
sluice foundation
seepage analysis
Improved Resistance Coefficient Method
Pavlovsky Segmentation Method
Finite Element Method
Kabeli Hydropower Station
Nepal
