CONSTRUCTION WORK FOR ROUND UNDERGROUND CONTINUOUS WALL

摘要

PURPOSE:To increase the strength of a round underground continuous wall by a method in which the ground is excavated by a hollow rotary rod having an excavator on its tip to form an annular pit, a cylindrical reinforcing bar cage is erected into the pit, and concrete is then placed into the pit. CONSTITUTION:A driver 8 is actuated to penetrated a hollow rotary rod 6 into the ground while being turned. At the same time, a stabilizer liquid (b) is reversely circulated through a circulation hose 11, and excavated soil is discharged, together with the stabilizer liquid (b) rising in the hollow of the rod 6, to the ground's surface to form an annular pit (a). A reinforcing bar cage (c) is then erected into the pit (a) and concrete (d) is placed into the pit (a) to replace with the stabilizer liquid (b).