TRUSSED ARCH ROOF ESTABLISHED UPSIDE UNDERGROUND STRUCTURE AND ITS CONSTRUCTION METHOD BEFORE CONSTRUCTING OF UNDERGROUND STRUCTURE

摘要

The present invention relates to an arch truss roof and its construction methods that are installed on top of the underground structures, excavation After an teopa in a way to form a space by a corrugated steel and underground structures in space to form the lower part to be greatly reduced when you dig tobun Tunnel excavation and construction of a purpose to reduce the loads acting on the underground structure there. ; underground structure around the arch truss roof construction style space installation method of the present invention to achieve this, the underground structures (10) tobun the site yet to be formed in the upper side of the corrugated steel surfaces to be digging up the construction site and destruction step, the space portion 25 so as to assemble corrugated steel plate (23) and form a space portion 25 and the corrugated steel reinforcing assembly and the space portion structure comprising: a reinforcing structure of the inner, lower side of the corrugated steel tobun and wave out underground structure 10 to form an underground structure is formed, including the mixture is a corrugated steel infill backfilling step 23 above the mixture 30 of the space portion 25 and is characterized in that said