基于流固耦合理论的水利工程防渗墙渗流稳定性研究

Study on Seepage Stability of Hydraulic Engineering Cut-off Wall Based on Fluid-Structure Coupling Theory

为了研究渗流场与应力场耦合情况下坝体防渗墙的内力及变形规律,基于ABAQUS数值有限元,对耦合算法及非耦合算法下大坝防渗墙的应力及变形异同进行分析。结果表明,正常蓄水位下,最大主应力在耦合与非耦合情况下的分布特征基本相同,均随深度增大而增大,水平位移随高程的增大而增大。总体来看,采用耦合算法得到的位移比非耦合算法的更小。研究结果可为水利工程防渗计算方法的选择提供参考。

In order to study the law of internal force and deformation of anti-seepage wall of dam body under the coupling of seepage field and stress field,based on the ABAQUS numerical finite element method,the similarities and differences of stress and deformation of the dam cut-off wall under the coupling algorithm and the non-coupling algorithm are studied in this paper,the distribution characteristics of the maximum principal stress in the coupled and uncoupled cases are basically the same,both increase with the depth,and the horizontal displacement increases with the elevation.In general,the displacement obtained by the coupling algorithm is smaller than that by the uncoupling algorithm.The results of this study can be used as a reference for the selection of hydraulic engineering calculation methods.