*TADA Koji KOJI¹, TAJIMA HUMIKA¹, HAYANO KIMITOSHI¹, NAKAMURA TAKAHISA², MOMOYA YOSHITUGU² (1. Yokohama National University, 2. Railway Technical Research Institute)

*Fumika Tajima¹, Koji Tada¹, Kimitoshi Hayano¹, Takahisa Nakamura², Yoshitsugu Momoya² (1. Yokohama National University, 2. Railway Technical Research Institute)

*Kodai Ishikawa¹, Tadashi Hara¹, Takashi Nakayama², Keigo Koizumi³ (1. Kochi University, 2. C.S.Inspector Co.,Ltd, 3. Osaka University)

*Takashi Nakayama¹, Tadashi Hara², Kouta Ishikawa², Keigo Koizumi³ (1. Cs Inspector Co., Ltd., 2. Kochi University, 3. Osaka University)

*HIJIRI HASHIMOTO¹, HIROCHIKA HAYASHI¹ (1. Civil Engineering Research Institute for Cold Region, PWRI)

*Naoya Sasaki¹, Takuo Azuma¹, Tetsuya Sasaki¹, Shunji Kato¹ (1. Public Works Research Institute)

*MASAHIKO NOSHIRO^1,2, ZEN RYOU^1,2, KIMITOSHI HAYANO^1,2 (1. Yokohama National University, 2. Yokohama National University Graduate School)