In this study, we analyzed the effect of the drainage slope to collapse. The presence of drainage has a low correlation with the collapse of the slope. But drainage of the drainage has an important role in preventing the decay slope. Therefore, the drain state is very important in order to evaluate the drainage.

• 허인영(한국시설안전공단 국도시설성능관리실 대리) | Heo, In Young
• 이종건(한국시설안전공단 국도시설성능관리실 차장) | Lee, Jong Gun
• 김용수(한국시설안전공단 시설안전연구소 수석연구원, 공학박사) | Kim, Yong Soo
• 석재욱(국립재난안전연구원 연구기획과 시설연구사, 공학박사) | Suk, Jae Wook