In transforming a tiny, twin-peaked off-shore island into a level airport, the mountains were reduced to rock rubble and submerged as fill to form a foundation for a concrete embankment. The initial fill was then placed in the shape of a peripheral retainer. The project which called for changing Mino Island (Japan) into a 335-acre jet port with a 10,000 ft. long x 200 ft. wide runway and containing 9,800 ft. of taxiway plus supporting terminal buildings and roadways, required the reduction, moving and placing of 25-1/2 million yards in 19 months. Reduction of the peaks (by 130 ft. and 200 ft.) took place in 65 ft. bench cuts, using a single ton of AN/FO per blast. A fleet of 31 tracked drill, including three with 6.6 in. dia. bits bored the blast holes. About 30 dozers and 30 loaders worked in pairs to load rubble into trucks. Two pontoon-type mobile jetties placed 3-1/2 mi. of peripheral foundation. The steel-hulled mobile jetty (65 x 165 ft.) was tailored to the job. Fill was limited to a maximum of 5-ton rocks to prevent any uneven settlement caused by excessive weight density.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Authors:
    • Wakabayashi, J
  • Publication Date: 1975-8

Media Info

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Filing Info

  • Accession Number: 00127484
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 10 1976 12:00AM