Recently, it is more concerned about securing of its seismic safety, as underground structures are significantly recognized. Especially, it is very important that underground structures such as the tunnel of urban railroad or subway ensure the seismic safety of its, because it can be caused an enormous loss of lives and a economical damage by earthquake. When the subway tunnel of cut-and-cover box type is constructed, grounds are excavated and refilled.
In this study, the parametric study is performed and analyzed about factors affecting seismic analysis of cut-and-cover tunnel, such as soil type, refilled range, tunnel location, etc. Consequently, it is hoped to provide the preliminary data for a better reasonable review on seismic design and seismic performance assessment of underground structures.

• 이태형(한국시설안전공단 진단본부 일반철도실 과장, 공학박사) | Lee, Tae Hyung
• 황인백(한국시설안전공단 진단본부 일반철도실 실장) | Hwang, In Baek
• 기정서(한국시설안전공단 진단본부 일반철도실 직원) | Ki, Jung Su 교신저자
• 박재영(한국시설안전공단 진단본부 일반철도실 과장) | Park, Jae Young