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Ashton, P and Gidado, K (2001) Risk associated with inadequate site investigation procedures under design and build procurement systems. In: Akintoye, A (Ed.), Proceedings 17th Annual ARCOM Conference, 5-7 September 2001, Salford, UK. Association of Researchers in Construction Management, Vol. 1, 961–9.
- Type: Conference Proceedings
- Keywords: site investigation; uncertainty; risk management; design and build; procurement
- ISBN/ISSN: 0 9534161 6 X
- URL: http://www.arcom.ac.uk/-docs/proceedings/ar2001-961-969_Ashton_and_Gidado.pdf
Research has shown that the use of Design and Build procurement system is rapidly increasing in the UK construction industry. A Client needing to have one point of responsibility that is willing to take all of the construction risk seems to be one of the main reasons for the spiral increase. As part of an on going research programme the work described in this paper has indicated that a large proportion of design-and-build contractors have reported difficulties when carrying out substructure works as a result of uncertain ground conditions. The research has established that these were mainly due to the direct consequence of actual site conditions being different to those portrayed by the initial Site Investigation (SI) reports. SI reports are generally based upon current procedures outlined by the Building Research Establishment (BRE, 1987, 1989) and the Building Standards Institution (BSI) Code of Practice for Site Investigations (BS 5930:1981). This paper has identified the factors that bring about discrepancies in SI information and has reported significant problems that result from inadequate SI procedures. This paper is based on data and information collected using 1000 questionnaires sent to construction practitioners. The work is also supported by case studies of selected construction projects in the UK.