UNDERGROUND SPACE CONSTRUCTION METHOD

摘要

PURPOSE:To construct an underground space of a large cross section easily and at a low cost by connecting outside tunnels of rectangular cross section to construct an endless outside structure body and then excavating and lining the inside. CONSTITUTION:Outside tunnels 3a whose cross sections are rectangle are properly spacedly constructed using an excavator comprising a plurality of shield machines connected between a plurality of shafts properly spacedly constructed in the ground B. In the next step, the natural ground between the outside tunnels 3a is excavated, and the outside tunnels 3a are connected to each other with a concrete structure body using a connecting tool as reinforcing material in an endless state and integrated in a body to construct an outside structure bodies 3 and 3. The inside natural grounds of the outside structure bodies 3 are excavated and lined to form an inside tunnel 12 so as to construct an underground space A whose cross section is large.