This article discusses how to improve the investigations of ground conditions, that are needed to prepare for tunnelling operations. From the outset, the implementation of any ground investigation programme must be regarded as an iterative process, requiring a flexible approach to both techniques and contract. In this way, the nature and scope of the works can be varied according to the conditions met in relation to the proposed project. Suitably qualified and experienced engineers and geologists should form part of the project team from the beginning. Only in this way can the full benefits be obtained from a well planned, implemented, and interpreted investigation programme. The procedures, recommended by the Site Investigation Group of the Institution of Civil Engineers, should go far to rectify some of the problems with site and ground investigations, experienced in the past. However, there will always be a residual risk associated with unforeseen ground conditions in underground construction, even with the best ground investigation practice, because of the origin and nature of the ground. Developing Reference Ground Conditions is as appropriate today as when this was proposed 20 years ago. Clear documentation of ground conditions, through definition and description, has fundamental importance.

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    LONDON,   United Kingdom  EC2A 2HD
  • Authors:
    • MELLORS, T
  • Publication Date: 1995-11


  • English

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Filing Info

  • Accession Number: 00720789
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: May 24 1996 12:00AM