Construction construction method of underground structure and stiffener null for underground structure

摘要

PURPOSE:To build a continuous underground wall with fluidic concrete, by excavating the ground for a hole while filling a stabilizing liquid into the hole from the ground surface, by installing a reinforcement secured thereto with steel strips in the hole, and by placing concrete. CONSTITUTION:A groove hole 12 is formed by excavating the ground down to a predetermined depth while a stabilizing liquid 10 such as muddy water or the like is filled in the hole 12 in the ground surface. A reinforcement in which assembled frames 16 each formed from an angle steel is welded thereto with flexible steel strips 18 is installed in the hole 12 and then concrete 20 is placed therein. With this arrangement, the reinforcement 14 can be assembled by a simple welding work, thereby it is possible to build a continuous underground wall in which the concrete 20 to be placed ensures a fluidity.