Sarukuyoji Landslide consists of a series of several sliding units and moves seasonally 2-5 meters per year at the head of a sliding unit.
The active source of the unit is the thrust of the upper sliding unit and water pressure filling tension cracks.
Displacement of the unit involves both creep movement on sliding surface and deformation due to consolida tion of the sliding unit.
In this paper, displacement of a sliding unit in Sarukuyoji Landslide area is analysed on the base of a consolidation theory.
The stresses in the sliding mass are calculated by force-polygon method. Void ratios to the stresses are got through e-log p curve, and strain and deformation of the sliding mass are calculated.
Slight over-consolidation of the sliding mass causes its consolidation deformation.