摘要
碾压砼坝因存在水平施工缝,其渗流特性、渗控技术及施工对策等较常规砼坝要复杂得多。本文借助于固定网格求解有自由面渗流问题的“节点虚流量法”,用较精细的三维有限元数学模型对碾压砼坝的渗流特性进行了计算分析。在建立模型过程中,着重介绍了对坝身层面缝隙的强透水性、坝内排水孔和廊道洞室的渗控行为以及坝基排水井作用等的合理数学模拟方法.基本上解决了碾压砼坝渗流计算分析的数学建模问题。文中结合铜街子牛日溪沟1号坝的设计施工情况,根据27个方案,进行了分析讨论,并给出笔者的建议。
A 3-d, numerical refined model is developed for simulating seepage flow through RCC dams. In the model the rational modelling of the seepage characteristics and the seepage control effectivenesses of the lift joints, the drainage holes in dam, the gallery openings, and the relief wells in foundation are more exactly presented. According to the given design and construction conditions of the dam No.1 on the Niu-ri Creek, 27 schemes of seepage flow control are calculated and the results are interpreted in detail. Finally, recommendations for design and construction of the seepage flow control are given.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1993年第6期34-43,共10页
Chinese Journal of Geotechnical Engineering
关键词
渗流
渗流控制
碾压混凝土坝
seepage flow, seepage flow control, roller-compacted concrete dam, lift joint, drainage hole, relief well, gallery, free surface of seepage, seepage surface.
