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Ground Improvement Case Histories by Cholachat Rujikiatkamjorn, Jian Chu, Buddhima Indraratna

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Chapter 9

Dry Soil Mixing for the Ballina Bypass Motorway Upgrade

Richard Kelly1,2; Ernst Friedlaender3; Theva Muttuvel1    1 Coffey Geotechnics Pty Ltd., NSW, Australia2 ARC Centre of Excellence in Geotechnical Science and Engineering, University of Newcastle, NSW, Australia3 Keller Ground Engineering, NSW, Australia

Abstract

The Ballina Bypass motorway was constructed over deep deposits of soft soils. Large embankment settlements and embankment failures have historically occurred in this region. Key project challenges were managing multiple critical paths through the construction program and achieving tight settlement design criteria. Dry cement soil mixing (DSM) was the key ground improvement technology that allowed these requirements to ...

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