山口県下で発生した豪雨による急傾斜地の崩壊の予測のためのデータベース化

概要

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The regional characteristics of soil and geology of slopes that failed due to heavy rainfall in Yamaguchi prefecture during the years 1978∿85 are summarized. Also, the characteristics of slopes and rainfall affecting slope failure are investigated. It was found that the failed slopes have their own characteristic soil and geology in each public works office jurisdiction. Furthermore, the depth of the failed surface soil layer is 0.5∿2.5m irrespective of the soil type and there exists the limited value of rainfall causing slope failure. It was also shown that by multivariate analysis that the depth of the surface soil layer is the most important factor affecting the amount of failed soil. From the above-mentioned results, it is thought that slope failure induced by heavy rainfall is predictable by surveying the depth of the surface soil layer of a slope.
山口大学の論文