Improvement of soft soil formations by drilled displacement columns

Larisch, M. D., Kelly, R. and Muttuvel, T. (2015). Improvement of soft soil formations by drilled displacement columns. In Buddhima Indraratna, Jian Chu and Cholachat Rujikiatkamjorn (Ed.), Ground improvement case histories: embankments with special reference to consolidation and other physical methods (pp. 573-622) Kidlington, Oxford, United Kingdom: Elsevier. doi:10.1016/B978-0-08-100192-9.00021-1


Author Larisch, M. D.
Kelly, R.
Muttuvel, T.
Title of chapter Improvement of soft soil formations by drilled displacement columns
Title of book Ground improvement case histories: embankments with special reference to consolidation and other physical methods
Place of Publication Kidlington, Oxford, United Kingdom
Publisher Elsevier
Publication Year 2015
Sub-type Research book chapter (original research)
DOI 10.1016/B978-0-08-100192-9.00021-1
Open Access Status Not Open Access
ISBN 9780081002391
9780081001929
Editor Buddhima Indraratna
Jian Chu
Cholachat Rujikiatkamjorn
Chapter number 21
Start page 573
End page 622
Total pages 50
Total chapters 26
Collection year 2016
Language eng
Abstract/Summary Drilled displacement columns (DDCs) are a soil improvement method where a closely spaced array of concrete columns is installed to reduce settlements and increase stability. This ground improvement system often incorporates a load-transfer platform. The DDC method has proved to be a very successful system, allowing embankments and structures to be constructed rapidly in poor ground conditions. However, there are different ways of designing the DDCs and associated load-transfer platforms and some uncertainty exists regarding which approach to adopt. Heave and lateral displacement of DDCs adjacent to columns being installed is common and often causes the columns to crack. This raises concerns during construction about the subsequent performance of the columns. A detailed discussion of DDC design and construction is presented in this chapter, and then three case histories are presented describing the design, construction, and subsequent performance of embankments constructed on drilled displacement columns in Australia.
Keyword CMC
CSC
Drilled displacement columns
Ground heave
Ground improvement
Load-transfer layer
Rigid inclusions
Soft soil
Soil improvement
Q-Index Code BX
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Book Chapter
Collections: School of Civil Engineering Publications
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