【摘要】 笔者在近 2 0年来对工程渗流问题研究的基础上 ,针对拱坝坝基岩体的渗流特性和有复杂的防渗与排水降压渗控措施 ,详细地论述了如何用有限单元法精细地求解坝基整体渗流场的思想和具体处理技术 ,所提出的算法技术在理论上是严密的 ,多年来一直已在工程中得到了广泛的成功应用。最后 ,作为算例对一个高 14 0m的拱坝坝基的三维整体渗流场进行了计算分析更多还原

【Abstract】 Based on their own research work lasting over 20 years and taking into account the seepage characteristics of the fractured rock masses and the complicated seepage prevention and drainage measures in arch dam foundations, the authors presented the main concepts and concrete techniques for strictly refined solution to 3D seepage problems in arch dam foundations with finite element method in detail. For the propose, many concepts and techniques are introduced, such as the procedure of nodal virtual flux, drainage substructure of drainage holes, transformation of type of seepage boundaries, exit flowing drainage hole, overflowing drainage hole, switch of seepage, real seepage domain, virtual seepage domain, real element, virtual element, transition element, continuous model, discontinuous model, and hybrid model. These are theoretically strict and have been widely and successfully used in practice for many years. Finally, as an example, a 3D seepage field in the foundation of a 140 m high arch dam is calculated and analyzed.更多还原