兵庫県南部地震による変状宅地の動的解析

Abstract

兵庫県南部地震により地盤の沈下, 擁壁のはらみ出し等の変状被害が発生した宅地とそのような変状が発生しなかった宅地の両方を対象として, 本報では宅地地盤の浅層地盤構造を明らかにするために反射法弾性波探査を実施し, それらより得られる結果を用いて地震応答解析を実施し、解析結果を比較することにより変状被害の発生原因を考察した。

Many housing lands are damaged in the foot of Rokko Mountains due to Hyogo-ken Nanbu Earthquake.In this report, causes of the damage of housing land are investigated through a dynamic response analysis. For this purpose, seismic prospecting was carried out with reflection method at damaged and undamaged locations to grasp the near-surface ground structure in this area. Then, a dynamic response analysis was performed using the input data obtained by the seismic prospecting. It is suggested that the damage could occur resulting in a sliding of soil mass of the surface layer.