A NEW METHOD FOR THE RUN-OUT ANALYSIS AND MOTION PREDICTION OF RAPID AND LONG-TRAVELING LANDSLIDES WITH MPM

Abstract

Earthquake and rain induced rapid and long-traveling landslides can cause heavy damage and are very difficult reinforcing the slopes is difficult. Thus it is important to evaluate the landslide risk with help of run-out analyses. A numerical tool based on MPM was developed and applied to run-out analysis of elastic material and dry sand on a frictional plane. A comparison with theories and experimental results shows that numerical tool gives promising results. In addition, a new and practical depth averaged method for landslide run-out analysis across three-dimensional terrain by discretizing St. Venant’s equation with MPM was developed and results of run-out analyses of elastic material, dry sand and recent rapid and long-traveling landslides are presented.