ON THE GROUND STRAIN IN KUSHIBAYASHI LANDSLIDE AREA

The authors resumed the geophysical observations of soil mass movement in the Kushibayashilandslide area located in Ogoto town, by internal strain meters, extensometers and tiltmeters fromJuly, 1971. Particularly, we were interested in detailed surveies of features of the distributions oftilting and extention of the ground surface, and investigated the relationship between the state ofmovement of the ground surface and the form of the slip plane by finite element method in elastictheory of plane strain. Then, we presumed the form of the slip plane from the distributions oftilting and extention, as shown in Fig. 7.