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一、前言在最近发生的强烈地震中,引人注目的震害是天然斜坡滑动,或人工填土的破坏所造成的人身财产的损失愈益增多。1977年1月24日伊豆近海地震中,有25人死亡和205人受伤,多数是被山腰滑坡所卷入。此外,巨石的崩落或填土的破坏,使公路堵塞,矿山、水库遭受破坏,大量的财产受到损失。1978年6月12日宫城县冲地震,仙台市和白石城市内住宅区遭受破坏,给居民造成很大的灾害。同时,北上川和阿武隈川的下游区域,在河流堤坝上大面
I. INTRODUCTION In the recent strong earthquakes, the eye-catching earthquake damage was caused by the natural slopes sliding, or the loss of personal property caused by the destruction of artificial fills. In the earthquake on January 24, 1977 in Izu, 25 people were killed and 205 injured. Most of them were involved in a mountainside landslide. In addition, the collapse of huge rocks or the destruction of filling fills the roads, damaging the mines and reservoirs, and causing massive losses of property. On June 12, 1978, the earthquake in Miyagi Prefecture damaged the residential areas in Sendai City and Shiraishi City, causing great disasters to residents. At the same time, the downstream areas of Kitakamigawa and Abuwa River, on the face of a river embankment