METHOD FOR DIGGING TUNNEL

摘要

PURPOSE: A tunnel excavation method is provided to prevent environmental disruption by conserving natural view as it is without damaging the in-situ ground, and to reduce the cost and period of construction and to prevent an accident by excluding ground stabilization work. CONSTITUTION: A tunnel excavation method comprises the steps of press-fitting plural support pipes(30) successively from the in-situ ground(10) to a bedrock layer inside a soil layer, excavating the soil inside the press-fitted support pipes to the bedrock layer, and installing a support to the excavated inside space.