A Study on the Estimation Method of Steel Pipe Propulsion Friction Resistance

This study calculated the steel pipe propulsion friction force required for tunnel excavation. To experimentally estimate frictional resistance of a pipe, model soil tank was constructed, and test conducted under condition applying earth pressure from field data. analyze effect when inserted, section where load most generated selected numerical analysis performed. In analysis, shear assumed to uniformly act on entire consequently, owing overburden acted section. For cross thickness were maintained in ratio 1:4 actual size according law similarity which scale factor applied penetration simulation. experiment, estimated using stratum based drilling result it as condition. From data obtained trend line determined, this line. Based these data, intrusion simulation performed, compared with theoretically resistance. Consequently, error rate less than 5%, proper derived.