FIELD EXPLORATION FOR TRANS-KOOLAU TUNNEL IN HAWAII

A subsurface exploration was carried out for the Trans-Koolau Tunnel project on the island of Oahu, Hawaii. Boreholes were located in densely vegetated areas on very steep slopes. The sites were not accessible to trucks, and supply of water for drilling was limited. The equipment and personnel were airlifted in and out of the sites by helicopters. An air/foam mixture was used as a drilling fluid to minimize consumption of water. In this paper, the background of the drilling operations and techniques utilized to overcome the difficulties posed by the remote location and steep terrain are described. (A) For the covering abstract see IRRD 873033.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 121-7

Subject/Index Terms

Filing Info

  • Accession Number: 00712378
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 90-5410-343-4
  • Files: ITRD
  • Created Date: Oct 24 1995 12:00AM