Influence of suprapermafrost water seepage on the stability of the frozen sloping embankment
In order to study the influence of the suprapermafrost water seepage on the stability of the frozen sloping embankment,a numerical simulation model based on strength reduction method,Mohr-Coulomb yield cri-terion and Darcy's Law was established to simulate the water seepage and soil deformation in frozen layer before and after the embankment construction.The simulation process was conducted on a finite element software.The re-sults show that the embankment construction changes the seepage path and the seepage path has been prolongated,the seepage velocity has been slow down.Affected by the heat transfer of the embankment,the permafrost under-neath the embankment has been melt,and the permafrost table drops down and forms a melting trough.The area a-round the permafrost table is the potential slip region.The greater the slope angle,the greater the thaw depth,and the greater the possibility of plastic deformation and sliding instability.In order to improve the stability of the em-bankment,it is recommended to do a good job of embankment drainage to avoid water accumulation at the foot of the embankment slope.
万方数据
维普
