Element for tunnel covering works and the tunnel construction manner null which uses

摘要

PURPOSE:To facilitate construction, to minimize a period of construction, and to make sufficient earth pressure resistance in the case a large-sized three dimensional intersection tunnel is constructed. CONSTITUTION:Longer elements 7 connecting a pair of concrete slabs 8 through a steel frame 9 are arranged in a portal-shape to place concrete 20 between the concrete slabs 8. In addition, prestress is introduced in the direction of arrangement of the elements 7 by PC steel materials 19 to form a tunnel wall 4, and filling 2 are applied around the tunnel wall 4 to obtain a tunnel 3.