*MASARU TAKEMOTO¹, Jun Nakamura¹, Toyokazu Murakami¹, Yukio Nakata², shou Yoshimura² (1. Nippon Expressway Research Institute, 2. Yamaguchi University)

*Yukio Nakata¹, Shyo Yoshimura¹, Masaru Takemoto², Jun Nakamura², Toyokazu Murakami² (1. Yamaguchi University, 2. Nippon Expressway Research Institute Co., Ltd )

*Masaki Nakamoto¹, Shingo yanagisako¹, Toyokazu Murakami² (1. West Nippon Expressway Engineering Chugoku Co,Ltd., 2. Nippon Expressway Research Institute Co,Ltd.)

*Shinya Tanaka¹, Masahiro Kaneko¹, Toyokazu Murakami² (1. West Nippon Expressway Engineering Chugoku Co,Ltd, 2. Nippon Expressway Research Institute Co,Ltd)

*SAWADA KAZUHIDE¹, TOYOSHI KATO², DAISUKE ENDO³ (1. Fuculty of Eng. Gifu University, 2. Marusu sangyo, Co., Ltd., 3. INOAC Housing & Construction Materials Co.,Ltd.)

*NISHIMURA AKIRA¹, Nishigaki Makoto¹, suzuki shigeyuki¹ (1. okayama soil laboratory)

*YUJING JIANG¹, Mahiro Katafuchi¹, Lin Wang² (1. Nagasaki　University, 2. Chuo Kaihatsu Corporation)

*Ryoya Isoai¹, Kenichi Maeda¹, Naomasa Sugiyama¹, Aya Kimura¹, Masanori Sugawara², Hiroya Ishihara³ (1. Nagoya Institute of Technology, 2. Koken Engieering Co.,Ltd., 3. Civil Engineering Research Institute for Cold Region)