Due to the dense and increasing population of the cities in Japan, especially around Tokyo, Osaka, and Nagoya, it has been necessary to expand water supply, sewerage, subway, electric communication cables and other underground services. The work resulted in dwellers' complaints of noise, vibration and traffic obstruction. Thus the shield method gained preference over the traditional use of cut-and-cover. The article describes the operation and performance of the EPBS (earth pressure balance shield) equipment compared with slurry shield, conventional mechanical shield and open face shield equipment. The fundamental concept of the EPBS is that soil at the face is controlled to avoid settlement. The discharge from the soil chamber is balanced against the muck intake from the cutter head, this volume being equivalent to the shield advance distance, and so groundwater ingress is prevented. (TRRL)

  • Availability:
  • Corporate Authors:

    Morgan-Grampian (Construction Press) Limited

    Morgan-Grampian House, 30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Naitoh, K
  • Publication Date: 1985-5

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 15-18
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00451391
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: May 31 1986 12:00AM