Abstract
Given that Japan has a great deal of slopes with geographical steepness and geological weakness, the idea of preventive maintenance has been employed in the aim of securing the safety and strength of our land against natural disasters. From the preventive maintenance point of view, the quantity of slope inspections is expected to increase, since stable slopes where no movement is presently observed require inspection in order to grasp the current danger of collapse.
Especially in the Chugoku region where local severe rain is increasing, there are many slopes with potential risks, which make the preventative maintenance against landslide disasters more important.
In this research, the singularity of the relationship between the disaster history of highway slopes and the geography, geology, and rainfall, is derived by analyzing the surface geology from the perspective of the preventive maintenance against road disasters.
