Two sections of four-track road, one in a tunnel and one in a cutting, are effectively drained by systems of Armco corrugated pipes. In the tunnel the 8-in. perforated pipe was installed between the track at 6 to 7 ft. below rail level, a fall of 1 in. 250. In 24 hr 3500 gal. of water were pumped out. The ballast at the 1500-ft. shallow cutting was 3 to 4 ft. deep. Two lines of subsurface 12 in. diameter longitudinal drains were installed beside the ballast. Volume of drainage varies from 350 gal. per hour during a dry spell to 2500 gal. per hour after several days of intermittent heavy rain.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Publication Date: 1941-10-31

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Filing Info

  • Accession Number: 00037645
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM