In this study, stability analysis was conducted for improved open-cut tunnel ground by preloading. The result of this study, vertical and unequal settlement was within the acceptable range. However, the field of soft ground can cause greater settlement than predicted. Therefore, the structure must be constructed in preparation for the differential settlement.

• 도종남(정회원, 한국도로공사, 도로교통연구원 구조물연구실, 선임연구원) | Do, Jong-Nam
• 남문석(정회원, 한국도로공사, 도로교통연구원 구조물연구실, 책임연구원) | Nam, Moon-Seok
• 박창호(정회원, 한국도로공사, 도로교통연구원 구조물연구실, 실장) | Park, Chang-Ho
• 박영호(정회원, 한국도로공사, 도로교통연구원 안전연구실, 연구위원) | Park, Young-Ho