THE CONSTRUCTION OF EXPRESSWAY TUNNEL WITH CROSS SECTION: THREE TRAFFIC LANES IN A TUBE

Both the Takarazuka Tunnel and the Maitani Tunnel are the first examples of 3-lane tunnels in Japan. These two tunnels with unique flat, circulat sections penetrate into low mountains and, thus, have small cover. The flat circular shape of the cross section was finally selected after detailed study of aspects from constructional viewpoints. In fact, various new construction methods as well as the conventional ones were employed to cope with different geological conditions, and the instrumentation was simultaneously performed during the construction to monitor the ground movement. Great care was taken of the construction method so as to reduce the undesirable effects on the neighboring inhabitants since these tunnels are located in places adjacent to populated areas. Eventually, noise absorbers were installed at the tubes of the exit areas to reduce the noise level after their opening. This paper describes the planning, design and construction method of large cross sectional tunnels and, finally, reports the results of the application of sound absorbers.

  • Corporate Authors:

    Japan Road Association

    3-3-3, Kasumigaseki, Chiyoda-ku
    Tokyo,   Japan 
  • Authors:
    • Kawamori, T
    • Yamauchi, F
  • Publication Date: 1975

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Filing Info

  • Accession Number: 00139208
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 4 1976 12:00AM