This report, the first of a series of case history studies of tunnel projects made from the point of view of the site investigation, has been prepared with the generous co-operation of the Borough Engineer and Surveyor of the London Borough of Lewisham and his staff. Preliminary appraisal indicated London Clay under granular deposits. The site investigation contractor offered a very competitive price and subcontracted the boring and testing. Further boreholes for a route adjustment and for ground water measurements were put down by a drilling contractor employed and supervised by the Borough. The contractor found the site investigation fully adequate for tendering for pipe-jacking, and for specifying, tendering for and constructing the tunnel by the chosen alternative method using a shield and concrete segmental lining. Ground conditions at the face were systematically recorded. A number of services was encountered during construction, but no problems arose due to design, method of construction, or ground type or conditions.

  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Dumbleton, M J
    • TOOMBS, A F
  • Publication Date: 1976

Media Info

  • Features: Figures; References;
  • Pagination: 13 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00141846
  • Record Type: Publication
  • Report/Paper Numbers: Supp. Rpt. 235 UC Res. Rpt.
  • Files: TRIS, ATRI
  • Created Date: Jan 16 1977 12:00AM