SHAFT PENETRATION METHOD FOR UNDERGROUND CONTINUOUS WALL CONSTRUCTION AND DEVICE THEREFOR

PURPOSE:To construct a desirable underground continuous wall without correcting the penetrating direction of construction shafts. CONSTITUTION:Laterally lined-up construction shafts 6A-6C are mutually connected and made penetrate the ground simultaneously to drill a hole for constructing an underground wall. At the first hole drilling time, penetration is performed while rotating both end construction shafts 6A, 6C in the same direction. At the second hole drilling time, the rotating direction of at least the construction shaft 6C is set in the reverse direction to the rotating direction at the first hole drilling time in the case of placing the construction shaft 6A completely along the first drilled hole HC1 drilled by the construction shaft 6C, and in other cases than this, the rotating direction of at least the construction shaft 6A, 6C is set into the reverse direction to the rotating direction at the first hole drilling time.