CLIENT
John Holland Mcmahon Joint Venture
YEAR
2005
SCOPE
  • Geotechnical Investigations
  • Foundation Design
  • Pavement Design
  • Earthworks Supervision

Projects

Tonkin Highway Project

DP was engaged to undertake the geotechnical investigation and pavement design of the $140 million extension of the Tonkin Highway. The Tonkin Highway is a major circulation access route south of Perth, WA. DP also provided advice during construction and earthworks supervision for the 18 km new alignment.

Contributions to this project included:
  • Geotechnical study, pavement design and advice during construction of a four lane, dual carriageway highway.
  • Assessment of the design groundwater level.
  • Foundation design (footings, piling and stone columns) for five bridges, including temporary foundation system for bridge launching operations.
  • Extensive air-coring investigation in order to assess the nature and quantity of material that can be recovered from the proposed excavation of a 1.7 km long artificial lake, in order to use the recovered material asembankment for the highway.

 

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