TY - SER AU - Nakamura, Tsutomu AU - Mitachi, toshiyuki AU - Ikeura, Isao TI - Estimating Method for In-Soil De for mation Behavior of Geogrid Based onResults of Direct Box Shear Test KW - De for mation Behaviour of Non-Plain-Wave Fibrics KW - Direct Box Shear Test, Granular Material, Internat Friction Angle KW - Sand ER -