*Keito Sakaida¹, Keiji Ishikawa¹, Satoshi Nishihara², Tomoyuki Kurihara³, Taiji Hamada⁴, Yuki Kobayashi⁴, Osamu Ishikawa⁵, Haruhiko Gokudan⁶, Yutaka Hojo⁷, Kunio Saito⁸ (1. Nissaku Co., Ltd., 2. Nikkenshoji Co.,Ltd., 3. Chuo Kaihatsu Co., Ltd., 4. Kawasaki Geological Engineering Co.,Ltd., 5. Kensetugijyutu Center Co.,Ltd., 6. Plant-Trees Co.,Ltd., 7. Jibanshikenjo Co., Ltd., 8. Chuo University)

*Yutaka Hojo¹, Chiyomaru Takahashi¹, Shigeki Kondo¹, Isaku Yamamoto¹, Jyun Otsuka², Hiroaki Wakatsuki³, Nobuaki Kuge⁴, Kunio Saito⁵ (1. Jibanshikenjo Co., Ltd., 2. Takara Engineering Co., Ltd., 3. Chiba Engineering Co.,Ltd., 4. Daiei Consultant Co., Ltd., 5. Chuo University)

*Masanori Ishii¹, Masaaki Goto¹, Masayuki Shigetomi¹, Asaka Komeda¹, Koichiro Sado², Norihiko Nakagawa³, Hisao Tachibana⁴, Takeshi Fukasawa⁵ (1. Soil and Rock Engineering Co.,Ltd., 2. Chi-ken Sogo Consultants Co.,Ltd., 3. Hokkaido Soil Research Cooperative Association., 4. Koa Kaihatsu Co.,Ltd., 5. Mitsubishi Corporation Exploration Co., Ltd.)

*Asaka Komeda¹, Masaaki Goto¹, Masanori Ishii¹, Masayuki Shigetomi¹, Akihiko Oshima² (1. Soil and Rock Engineering Co.,Ltd, 2. Osaka City University)

*Toshihiro Mizuno¹, Kimihito Masumura¹, Tetsuo Abe², Nobuo Mishima² (1. Masumura Survey-Design INC., 2. Nippon Expressway Research Institute Co., Ltd.)

*Tetsuo Abe¹, Nobuo Mishima¹, Toshihiro Mizuno², Kimihito Masurura² (1. Nippon Expressway Research Institude Company Limited, 2. Masurura Survay-Design Incorporated)

*Tatsuya Kojima¹, Tsuyoshi Takayanagi¹, Yoshikatsu Shindo¹, Shoma Fujiwara¹, Daisuke Kubozuka², Kazuki Yokoyama² (1. Railway Technical Research Institute, 2. Nittoc Construcion Co.,Ltd)

*hironobu ito¹, junji uchida¹, daisuke fujita¹ (1. West Nippon Expressway Engineering Shikoku Co.Ltd.)