摘要
针对白石水库土坝的复杂渗流条件编制了有限元程序。对自由面的求解 ,在计算中提出了弃单元法算法 ,计算表明收敛快 ,和电拟结果对比显示该算法精度高 ,对计算无压渗流有通用性。用有限元方法对渗流量进行了计算。分析了实测水位和理论计算水位有较大差别的原因并提出相应的渗流稳定措施。此外 。
A FEM program is made to calculate the complicated seepage of the earth dam at BaiShi reservoir and a new finite element algorithm called abandoned element method is developed to solve the problem of free surface of the unconfined seepage. This method is verified to have good precision and convergence by comparison of calculation results with electrical resistance simulation method, and can be applied to all kinds of unconfined seepage. The unit rate of seepage flow is calculated by FEM method. In addition, reasons for the difference between calculated and measured water levels are analyzed. Accordingly, measures for seepage stabilization are proposed in this paper. The stability of the earth dam is also analyzed under the rapid drawdown.
出处
《水力发电学报》
EI
CSCD
北大核心
2003年第2期53-61,共9页
Journal of Hydroelectric Engineering
关键词
水力学
无压渗流
有限元
弃单元法
单宽渗流量
水位骤降
hydraulics
unconfined seepage
FEM
abandoned element method
unit rate of seepage flow
rapid drawdown
