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

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Chapter 8

Application of Analytical Method for Preloading

Design of Selected Case Studies

Patrick Wong    Senior Consultant, Coffey Geotechnics Pty Ltd, Chatswood, Australia

Abstract

Preloading is probably one of the oldest forms of ground improvement for soft grounds. Used with or without vertical drains to facilitate the consolidation process, preloading has consistently proven to be an effective means of reducing postconstruction settlement for hundreds of years. Methods of designing the required height of preloads range from simple rule-of-thumb procedures such as factoring up the design loading based on engineering judgment, to graphical methods using the “artificial aging” procedure described by Bjerrum (1972).

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