代古寺面板堆石坝渗流场有限体积法数值分析  

Numerical analysis of seepage field of Daigusi concrete face rockfill dam by finite volume method

作　　者：张明亮 宿晓辉 吴正桥[2] 张建涛 李浩瑾[2] ZHANG Mingliang;SU Xiaohui;WU Zhengqiao;ZHANG Jiantao;LI Haojin(Faculty of Infrastructure Engineering,School of Hydraulic Engineering,Dalian University of Technology,Dalian 116033,China;China Water Resource Beifang Investigation,Design&Research Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]大连理工大学建设工程学部水利工程学院,辽宁大连116033 [2]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利水运工程学报》2023年第6期205-212,共8页Hydro-Science and Engineering

基　　金：国家自然科学基金重大项目(52192674)。

摘　　要：针对代古寺混凝土面板堆石坝的坝体、坝基、面板与防渗帷幕等结构进行了三维精细化建模,模型单元数量达千万级别。运用自主研发的有限体积三维渗流计算分析软件DUT-Seepage对面板堆石坝进行三维渗流计算,着重研究面板与帷幕作用下的渗流场分布特征及其防渗效果,探讨基岩渗透系数对面板堆石坝渗流量的影响,最后分析了当坝基中存在挤压破碎带时,其渗透系数对大坝浸润线位置及渗流场的影响。研究结果表明:该混凝土面板堆石坝的面板和防渗帷幕有效阻断了上游水流的渗透,起到较好的防渗效果,能够保证大坝的安全运行;挤压破碎带的渗透系数对大坝浸润线的位置影响较小,但对孔隙水压力与总水头的分布影响较大,且当破碎带渗透系数较大时,水力梯度也会增大,对破碎带周边产生潜在渗透破坏风险。Three-dimensional refinement modeling is carried out for the dam body,dam foundation,face plate and impervious curtain of Daigusi concrete face rockfill dam(CFRD).Self-developed three-dimensional seepage calculation and analysis software DUT-SEEPAGE is used to calculate the seepage situation,emphasizing on the study of the characteristics of seepage field distribution and the anti-seepage effect by the joint action of face plate and impervious curtain,and the variation of dam leakage with permeability coefficient of dam base.Finally,the effect of the permeability coefficient on the infiltration line of the dam when there is a fracture zone in the dam foundation is analyzed.The results suggest that the anti-seepage effectively blocks the infiltration of the upstream water flow and plays a very good impermeable effect,which can ensure the safe operation of the dam.The change of permeability coefficient of the extrusion fracture zone has little influence on the position of the dam infiltration line,but the distribution of pore water pressure and total head changes greatly.Moreover,when the permeability coefficient of the fracture zone is large,the hydraulic gradient will also increase,resulting in the potential risk of seepage damage around the fracture zone.

关 键 词：精细化建模 面板堆石坝 三维渗流计算 坝基破碎带 有限体积法 

分 类 号：TV641[水利工程—水利水电工程]