CONSTRUCTION METHOD OF AN UNDERGROUND STRUCTURE THROUGH A TOP-DOWN METHOD USING A PRE-MOUNTED TOWER CRANE CAPABLE OF REDUCING CONSTRUCTION TIME

摘要

PURPOSE: A construction method of an underground structure through a top-down method using a pre-mounted tower crane is provided to simultaneously perform two or more excavation processes.;CONSTITUTION: A construction method of an underground structure through a top-down method using a pre-mounted tower crane is as follows. An earth retaining work and a PRD work are performed. Concrete is placed, and a tower crane(10) is installed on the placed concrete. Slopes around the tower crane are excavated. The outer edge parts of the slopes are processed. A ground layer and multiple underground layers are simultaneously excavated.;COPYRIGHT KIPO 2012