*MASATSUGU SHINOHARA¹, Yasumasa Soga¹, Atsushi Iizuka² (1. Hanshin expressway Company Limited, 2. Research Center for Urban Safety and Security, Kobe University)

*SHION NAKAMOTO¹, Junkan Wan¹, Marcus Klose¹ (1. DNV)

*CHINATSU MITSUOKA¹, Tani Kazuo¹, Nomura Shun¹, Suzuki Akihiko², Yabe Hiroshi², Tomita Akihiro² (1. Tokyo Univercity of Marine Science and Technology, 2. Fudo Tetra Corporation)

*OSAMU SAITO¹, YASUHIRO ASAHINA³, KYOUHEI SIOZAWA², KEIICHI TAKEDA⁴, KUNIHIRO OYABU⁵, KAORU KOBAYASHI¹ (1. Ibaraki University, 2. Sotono Elementary School, 3. Minohama Elementary School, 4. Maewatari Elementary School, 5. Hitachinaka City Hall)

*MIZUNO KATSUMI¹, Oomine kiyoshi², inui toru³, gige mayumi⁴, endou kazuto⁵ (1. oosaka Bentonite, 2. nagasaki University, 3. oosaka University, 4. oosakaootani University, 5. nies)

*ABE TAKAYUKI^1,2 (1. The Japanese Geotechnical, 2. Bulletin of Glaciological Research)

*Yu Kawai¹, Shun Nomura¹, Kazuo Tani¹, Akihiko Suzuki², Hiroshi Yabe², Akihiro Tomita² (1. Tokyo University of Marine Science and Technology, 2. Fudo Tetra Corporation)

*shogo iwatani¹, Tsuyoshi Yamaguchi¹ (1. NIT, Matsue College)