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Deep Mixing Tests

Sydney Australia
 
January/February 1999
 

Much of the runway structures of Sydney’s International Airport are bounded laterally by 5-m high Reinforced Earth walls. Over the years, however, outward movement of these walls has occurred due to wave and tidal action, leading to potentially very significant vertical movements on the adjacent aprons. Given the nature of the problem, the soils, and the existence of the horizontal retaining strips at close and frequent centers, a deep mixing system was conceived to provide a competent in situ “diaphragm” in the fills immediately behind the concrete facings.

Geosystems’ role included:

  • Review of soil and structural conditions to confirm feasibility.
  • In house technology transfer to prospective contractor.
  • Technical presentations to owners and consultants.
  • Design and supervision of field test program.
  • Technical reporting.

It is anticipated that the full 8 km of perimeter will be remediated soon.

 

Contact

 Mr. Derek B. Edwards
Director
INpeoNIST Pty Ltd.
14B Wyong Steet
Oatley, N.S.W. 2223
Australia
+61 2 9586 2530
derekbedwards1@bigpond.com
 

Associated Project: Technical Writing: FHWA

 

Technical Papers
Bruce, D.A., M.E.C. Bruce, and A.F. DiMillio. (1999). “Dry Mix Methods: A Brief Overview of International Practice.” Dry Deep Mix Methods for Deep Soil Stabilization, Proceedings of the International Conference on Dry Deep Mix Methods for Deep Soil Stabilization, Ed. by H. Bredenberg, G. Holm, and B. Broms, Stockholm, Sweden, October 13-15, pp. 15-25.
Bruce, D.A., and M.E.C. Bruce. (1999). “An Update on Deep Mixing Technology Worldwide.” GeoEngineering for Underground Facilities. Proc. of the 3rd National Conference of the Geo-Institute of the American Society of Civil Engineers, Geotechnical Special Publication No. 90. Urbana-Champaign, IL, June 13-17, pp. 1007-1015.

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