On Pile Driving in the Offshore of the Arabian Peninsula: The Status Quo and Major Concerns

The demand on pile installation in the offshore of the Arabian Peninsula has over the last three decades experienced an unprecedented boom, triggered by the construction of platforms, to facilitate the production and transport of oil and gas. Available borehole data show that ground conditions for pile installation in the offshore is highly variable, resulting in misassessment of insitu conditions, leading to a huge discrepancy between design ultimate pile capacities and actual capacities after installation. Driven piles in these deposits have, by and large, met refusal short of design penetration. In many cases the refusal is of an abrupt nature rather than a gradual increase in blow counts. The abruptness is an indication that the piles encountered unaccounted resistance, such as: a rock layer, cemented soil layer, or a boulder. Discrepancies may have also arisen from processes related to construction of the piles such as inadequate construction control or inevitable consequences of pile installation activities. Also, structural defects of the pile adversely affect outcome. The designer does not recognize the existence of the imperfections during the design/analysis process. Subsequent analysis has become a "must" remedial or will become a forensic exercise. The paper capitalizes on available pile installation data derived from several platforms. More specifically, the paper addresses issues of concern to the geotechnical community, presents typical data, and suggests ways to reduce the problems that have been encountered. The intent is to offer guidance to help solve the current offshore pile installation problems in the offshore of the Arabian Peninsula, and reviews methods by which the consequences of imperfections may be ameliorated.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 78-86
  • Monograph Title: GeoCongress 2012: State of the Art and Practice in Geotechnical Engineering

Subject/Index Terms

Filing Info

  • Accession Number: 01530360
  • Record Type: Publication
  • ISBN: 9780784412121
  • Files: TRIS, ASCE
  • Created Date: Nov 12 2013 2:02PM