CONCRETE INFILLING STEEL SEGMENT STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a concrete infilling segment structure superior in quality by preventing drop out of infilling concrete, and controlling and restraining a concrete crack width. SOLUTION: A concrete infilling steel segment 17 is characterized in a segment structure that drop out preventive steel materials 16 of an infilling concrete mass having prescribed strength joined to a joint plate 2 are arranged in a prescribed position in infilling concrete 5, and concrete crack width control steel materials 15 joined with main beams 1 are arranged at a prescribed interval in the tunnel axis direction in the prescribed position in the infilling concrete.