Ardently aerial construction method null of the beam in underground structure combined use beam

摘要

PURPOSE:To enhance the execution efficiency by suspending precast concrete beams from an opening on a floor of the first story, erecting them between structural studs on the lower story, connecting the ends of adjacent beams to each other, and placing reinforcement of the studs and cast-in-place concrete. CONSTITUTION:Precast concrete beams 6... are suspended down to an underground space excavated under a floor of the first story from an opening on a floor 2 of the first story executed in advance, they are carried out by a traveling truck, and they are erected between structural studs 1 and 1 in the lower story. After that, back-filling materials such as mortar 8, etc. are filled among the structural studs 1 and 1, the beams 6... and a landslide protection wall 4, and the beams 6... are braces for the landslide protection wall. Then, after the lowest foundation beam is constructed, projections 6a... of the ends of adjacent beams 6...are connected to each other in connection sections of the structural studs 1, 1 and the beams 6.... Reinforcement of the studs and cast-in- place concrete are placed, the connection sections of them with the beams 6... are made as a unit, and the beams 6... are used as permanent beams.