The recent use of geophysical methods in site investigations for roads in Britain has been examined to see how successful various applications were. The record was disappointing. It is concluded that determining the depth to bedrock is likely to be usccessful, and that help may be given in predicting the rippability of rock, but that other applications are only likely to be successful in carefully selected cases. If a geophysical survey is undertaken, the method and site must be chosen with care. The methods work best in simple geological situations, and should not be thought of as a solution to problems that all other methods have failed to solve. Adequate borehole control is essential. Recommendations are made for improving both geophysical surveys and geophysical reports. The close liaison necessary between engineer and geophysicist at all stages of geophysical surveying is emphasized. The geophysicist must advise on suitable methods and indicate when geophysical methods are not suitable and should present the results in a form suitable for use by the engineer. The results of geophysical work should be fully incorporated into the site investigation report and plotted on the longitudinal sections. The report will be useful to engineers dealing with geophysical methods of survey or making use of geophysical survey information, and to geophysicists undertaking geophysical work for an engineering site investigation. /Author/TRRL/

  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • WEST, G
    • Dunbleton, M J
  • Publication Date: 1975

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 23 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00127698
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: LR 680 R&D Rept.
  • Files: ITRD, TRIS, ATRI
  • Created Date: Mar 29 1976 12:00AM