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    • 10. 发明专利
    • EXCAVATING METHOD OF TUNNEL
    • JPH10292767A
    • 1998-11-04
    • JP11504397
    • 1997-04-18
    • KUMAGAI GUMI CO LTDTOBISHIMA CONSTRUCT CO LTDOKUMURAGUMI DOBOKU KOGYO KK
    • KAKIUCHI YUKIOKITAHARA SHIGEOWATANABE MITSUOTAKEGAKI YOSHIKATSUOYAMA HIROSHI
    • E21D9/00E21D9/10
    • PROBLEM TO BE SOLVED: To improve workability by excavating the upper half section of a tunnel, excavating a plurality of strips of upward opened ditches to a lower half section and pushing and crushing a plurality of split partitions. SOLUTION: The upper half cross section 12 of the tunnel is excavated, and a plurality of strips of ditches 16 are formed to a lower half cross section 14. The ditches 16 are formed to the left half section 14a of the lower half cross section 14, a right half section 14b is utilized as a carrying-out path for muck generated at the time of the excavation of the upper half cross section 12 and a working path, and the same ditches 16 are formed to the right half section 14b after the left half section 14a is excavated. The ditches 16 are shaped in the arbitrary direction such as the axial direction, transverse direction, oblique direction, etc., of the tunnel 10 as required. Since the ditches 16 are opened upwards, a plurality of partitions 22 divided by the ditches 16 are separated mutually from other partitions, and formed in a tabular shape and formed in an upright shape. Consequently, the partitions 22 are pushed and crushed easily by a crusher such as a breaker, and collapsed pieces are brought to a comparatively small state. Accordingly, the tunnel can be excavated easily while the efficiency of excavation can be improved.