DOUBLE LOOP TUNNEL STRUCTURE

摘要

PURPOSE: A double loop tunnel structure is provided to install a rail road and a tunnel for road in the upward and downward double loop shape in the district which has the big altitude difference of a topography. CONSTITUTION: The double loop tunnel structure is composed of: many refuge vertical exits(10) installing to be vertically moved when meeting with a misfortune or repairing the tunnel; a ventilating opening(20) for ventilating inside the tunnel; a pit used for refuge after used for the construction; and a turnout(30) for escaping an emergent misfortune such as a fire. The tunnel is installed in the upward and down ward double loop shape.