串林地すべり地における土地ひずみについて ―その観測体系―

Abstract

The observation system has been kept the accent on the landslide movement forecast (forecastof secondary movement) and the grasp of landslide mass movement after engineering works for theprevention of the landslide works. From such a system, we could obtain no more than the rough in-formations on the landslide mass movement. But, the observation system seemed to be unsuitablefor quantitative analysis of the movement condition of landslide mass.Thereupon, for the quantitative analysis, we designed a new observation system for the land-slide movement. Furthermore, improving on the internal strain meter and tilt meter, we manu-factured to trial a recording long water tube tilt meter and an internal deformation meter. It wasshown by the new observation system that, even in the small scale landslide area like this, the land-slide mass did not move as one mass but as some small blocks and the type of the movement was creep.