Abstract
There are many dangerous slopes in Japan because of conditions such as geography, geology, weather, land-usage and so on. Due to the limitation of the budget for countermeasures for dangerous slopes, it is impossible to conduct countermeasures for all dangerous slopes. Therefore, it is necessary to propose an efficient screening technique, which can pick out high-risk slopes from large numbers of dangerous slopes. In this study, in order to make a database of friction angle of rock joints, tilting tests using specimens obtained from various areas in Gifu Prefecture are carried out firstly. Secondly, a stability analysis method for rock slope is modified using the results of the tilting tests. Finally, a framework of screening method for dangerous slopes is proposed utilizing the database Borehole sample.
