堤基渗透变形扩展过程和悬挂式防渗墙控制作用的数值模拟研究

介绍了非稳定渗流场中渗透变形扩展的数值模拟方法和有限元模拟程序SDFEM,对砂槽试验模型进行了数值模拟,并将模拟结果与试验结果进行了对比分析.模拟结果说明悬挂式防渗墙渗流控制效果不显著,但对险情扩展的控制作用随防渗墙深度的加大而越来越明显,这与试验的结论是一致的.这说明,悬挂式防渗墙深入堤基一定深度是有利于堤防安全的.

Numerical Simulation of Seepage Deformation Propagation in Dyke Foundation And Effects of Cut-off Wall of Suspension Type

To further research the function of the suspended cut-off wall, this paper presents numerical simulation method and new code SDFEM for the seepage deformation propagation in transient seepage field. The sand box test model reported by authors is simulated with SDFEM. Numerical simulation results were discussed and compared with test results. The simulated results indicate that cut-off wall of suspension type affects seepage deformation occurrence little but it influences seepage deformation propagation significantly. The deeper the position of the wall intercalation is, the more difficult the seepage deformation develops, which coincide with the test results. So, this kind of suspended cut-off wall with a certain depth is benificial to improve flood-control safety.