開発と斜面災害

Abstract

The slope failures are provoked by the several natural phenomena and artificial operations. The slope failures accompanied by the development in the hills increase and become the important social problem. In this paper, the influence of development in the hills is explained, and the main causes of the many occurrences of the slope failure had to do with the level of the investigation method and the civil engineering works. Another problem was no perfection of the restriction of the law. When the developments of the hills are projected, the main civil engineering works are the developments of the building land and the construction of the road and dams. The investigation methods of the slope in these developments are discussed and the points of problem are explained. After the development has been perfected, too, the observations of the all kinds of instruments are found to be significant.When the occurrence of the landslide occures rapidly, the methods of many kinds of the emergency disaster prevention must be planned, and the effect of the system of the watch was proved in many cases.