Numerical Simulation for the Earthquake-Induced Deformation of a Residential Land Slope Reinforced with Landslide Prevention Piles

In this study, a numerical simulation for the earthquake-induced deformation of a residential land slope reinforced with landslide prevention piles is presented. The objective slope is a real residential land slope in Sendai city, damaged at the time of the 2011 off the Pacific coast of Tohoku earthquake. The focus of the study is placed on the effectiveness of the landslide prevention piles in the slope which have been constructed before the earthquake. Reproduction analyses for the slope which has been constructed these piles are performed with 2D dynamic elasto-plastic finite element analysis considering strain-softening characteristics of the soils. In addition, analyses which assumed the slope without these piles are performed for a comparison, and the effectiveness of these piles is considered.