| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel structure which is not fatally damaged when natural ground causes great deformation, and also to provide a construction method of a tunnel. SOLUTION: The cross section of the tunnel 3 is widened in a widening range 17 and FRC spraying concrete 11 with high toughness is provided on a wall surface. A material with rigidity lower than that of the natural ground 1 is filled into the inner side of the FRC spraying concrete 11 with high toughness to form a shear deformation reducing layer 13, and FRC lining concrete 15 with high toughness is provided inside the shear deformation reducing layer 13. COPYRIGHT: (C)2007,JPO&INPIT |
