亀の瀬地すべりの移動機構について ―清水谷地域地すべり―

Abstract

The strain of ground surface in the Shisnizudani region in the Kamenose landslide area hasgenerally appeared in the period of rainfall. Its distribution has some remarkable feature. Theauthor considered that such a strain appeared as a result of creep movement of the mass softenwith water infiltration. Thus, the soil mass in this area was modeled two dimensionally. Therelationships between the displacement and deformation of the soil mass and its mechanical struc-ture were obtained by the finite element method in elastic theory of plane strain. So it becameclear that the resistant force at the slip plane is larger in the upper part than in the lower part andthat the mechanical strength in the fractured zone influences the distribution of the surface strain.