地震工程学报Issue(2)：383-389,7.DOI:10.3969/j.issn.1000-0844.2015.02.0383
上游型尾矿坝液化前后渗流场与孔压分布数值模拟
Numerical Simulation of Seepage Field and Pore Pressure Distribution for Tailings Dam by Upstream Method before and after Liquefaction
摘要
Abstract
The impact of the liquefaction of tailings on a seepage field and the pore pressure distri-bution in a tailings dam are studied in this paper.A program named SAFTD is created based on the theory of seepage for porous media considering the characteristics of seepage in a tailings dam. SAFTD could predict the final phreatic surface by adjusting the mesh grids near the phreatic sur-face on the assumption of the initial phreatic surface,and a classic example is given to validate the reliability of this program.Then,SAFTD is used to simulate the seepage field and pore pressure change of the typical upstream tailings dam prior to and after the liquefaction.The numerical re-sults indicate that the center section of the phreatic surface raises remarkably after liquefaction, but changes little near infiltration points and frozen points.The pore pressure in the tailings dam increases by 18%~280% approximately,and the lower right of the initial starter dam has the lar-gest pore pressure increment.The simulation result is consistent with the analytical result of Mo-chikoshi’s #2 tailings dam discussed by Ishihara.关键词
尾矿坝/渗流/液化/数值模拟Key words
tailings dam/seepage flow/liquefaction/numerical simulation分类
天文与地球科学引用本文复制引用
刘洋,马利超,包德荣..上游型尾矿坝液化前后渗流场与孔压分布数值模拟[J].地震工程学报,2015,(2):383-389,7.基金项目
新世纪优秀人才资助项目(No.NCET-11-0579) （No.NCET-11-0579）
北京市青年英才计划资助项目(YETP0340) （YETP0340）
北京市优秀人才资助项目 （）
中央高校基本科研业务费资助项目 （）
