CONSTRUCTION METHOD FOR ANGLED UNDERGROUND CONTINUOUS WALL

摘要

PROBLEM TO BE SOLVED: To construct angled underground continuous walls by using only a cutter post and to change the direction of the cutter post without extracting it from the ground. SOLUTION: The underground continuous walls 4 and 7 are constructed in two directions at an angle. An expanded-width wall 5 having the wall thickness larger than that of the preceding underground continuous wall 4 is constructed at the intersection portion between the preceding underground continuous wall 4 and the underground continuous wall 7 intersecting it, and the direction of the cutter post 3 is changed in the expanded-width wall 5 after the expanded-width wall 5 is constructed, and the intersecting underground continuous wall 7 is constructed.