3-ARCH TUNNEL CONSTRUCTION METHOD PRE-CONSTRUCTION CENTER TUNNEL PART

摘要

PURPOSE: A method of constructing a three arch tunnel by pre-construction of a central tunnel unit is provided to reduce a construction period with more stable effect by shedding a conventional three arch tunnel construction technique. CONSTITUTION: A method of constructing a three arch tunnel by pre-construction of a central tunnel unit is as follows. The large central tunnel unit(100) of a three arch tunnel is first constructed. A middle column(120) is constructed in the large central tunnel unit. Running tunnel units(200,300) are constructed on the left and right of the large central tunnel unit.