REINFORCED SUBGRADE

Geological conditions in Japan result in about 700 km of the Japanese National Railways being rated as having "poor subgrade." To reduce maintenance on these segments, JNR has adopted a method of reinforcement consisting of a top layer of precisely sized slag and a bottom layer of sized crushed stone with asphalt emulsion spread over the subgrade to protect and cure the slag until it solidifies. Complete drainage of rainwater is provided during construction; subgrade materials are compacted to more than 95% of maximum dry density.

  • Availability:
  • Corporate Authors:

    Japan Railway Engineers' Association

    2-5-18 Otemachi, Chiyoda-ku
    Tokyo,   Japan 
  • Authors:
    • INO, T
  • Publication Date: 1977

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 22-23
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00170089
  • Record Type: Publication
  • Source Agency: Japanese Railway Engineering
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM