부산대학교 도서관

This study is targeted at national road #24 located in Ga-Ji Mt. provincial park, Gyeongsangnam-do. Study area is divided into two domains of A and B to study exposure characteristics and hazard of roadside slopes for each location. The east of Seoknam Tunnel is domain A and the west of that is Domain B. In domain A, $N25{\sim}39^{\circ}E$ and $N78{\sim}80^{\circ}W$ trending vertical joints develop systematically. These are considered as fractures by Riedel Shear(R-Shear) and conjugate Riedel Shear(R`-Shear) respectively caused by movement of Moryang Fault adjacent to domain A. Domain B contains relatively more massive rocks than domain A and has road-direction sheeting joints, which are capable of causing plan failure. The result of wetness index analysis shows higher index in domain B, indicating more effect of water in this domain. Domain A shows high frequency of rockfall by rectangular released rock, which is caused by vertical joints accompanied by Moryang Fault. Slopes located in domain B show high hazard and consequence because of poor joint pattern and much water flow. Therefore, it is necessary to set up long-term countermeasures for stability of slopes, considering features of each domain.