[1] Shizuoka Maintenance/Customer Service Center, Central Nippon Expressway Company, Shizuoka-shi, Suruga-ku, Japan
[2] On-site agent for seismic strengthening construction, Growgeo Company, Shizuoka, Shimada-shi, Japan
[3] Department of Civil and Environmental Engineering, Saitama University, Saitama-shi, Sakura-ku, Japan