*YUICHI HASEGAWA¹, Hitomi Nakano¹, Toshiyuki Ueno¹, Koichi Shimomura², Toru Kajihara² (1. OYO Corporation, 2. The Ministry of Land, Infrastructure and Transport Takeo river office)

*TOMOHIKO MORI¹, Yuuichi HASEGAWA¹, Toshiyuki UENO¹, Kouichi SHIMOMURA², Tooru KAJIWARA² (1. OYO Corporation, 2. The Ministry of Land, Infrastructure and Transport Kyushu-district maintenance bureau Takeo river office)

*SATOSHI TAMATE¹, Tomohito Hori¹, Ryoichi Kikuta², Koichi Nagao³, Daiki Ichiyama³ (1. National Institute of Occupational Safety and Health, Japan, 2. Japan Speed Shore Co., LTD, 3. Sato Kougyo Co., LTD)

*TADAYOSHI KONDOH^1,2, kawasakitisitu kge/hashimoto², moru moru/osimi³, chuo. chuouniversity/ohota⁴ (1. 川崎地質株式会社, 2. 地盤部, 3. 株式会社　モル, 4. 中央大学)

*RYOTA ITO¹, Syhhei Nomura¹ (1. OYO Corporation)

*TAKUMA TAKEDA¹, KATSUYOSHI HASEGAWA¹, SHIGERU IYAMA² (1. Kisojiban Conaultants Co.,Ltd., 2. Hiroshima Port and Airport Office , Chugoku Regional Bureau , Ministry of Land, Infrastructure, Transport and Tourism)

*YUTA SATO¹ (1. kiso jiban Consultants)