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Non-linear analysis of soft ground consolidation at the Ballina by-pass
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Geng, Xueyu , Indraratna, Buddhima, Rujikiatkamjorn, Cholachat and Kelly, Richard (2012) Non-linear analysis of soft ground consolidation at the Ballina by-pass. In: 11th Australia - New Zealand Conference on Geomechanics Ground Engineering in a Changing World, Melbourne, Australia, 15-18 Jul 2012. Published in: 11th Australia - New Zealand Conference on Geomechanics: Ground Engineering in a Changing World pp. 197-202.
An open access version can be found in:
Official URL: http://ro.uow.edu.au/engpapers/4432/
Abstract
This study presents a numerical assessment of consolidation under vacuum preloading with a system of vertical drains and membrane, considering the non-linear properties of the soil This
membrane system, already widely used in Australia, is where an airtight membrane is placed over the drainage layer to allow a vacuum to be distributed within the sand platform, along the surface of the soil, and down the vertical drains. To date, there have only been a few fundamental investigations and field studies that have tried to assess the way in which the vacuum can
propagate in soft clay, both laterally and vertically. In this model, both vertical and horizontal drainage was considered to reflect more realistic in-situ conditions. Moreover, the change of
compressibility and permeability during consolidation was taken into consideration, including a possible loss of vacuum along the length of the drain. This model was initially verified for a single
drain using large scale laboratory testing, and subsequently applied to a fully instrumented case study, namely the Ballina Bypass (along the Pacific Highway, NSW). The numerical solutions
capturing the lateral distribution of the vacuum provided accurate predictions of the pore water pressure and associated settlement.
Item Type: | Conference Item (Paper) | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | 11th Australia - New Zealand Conference on Geomechanics: Ground Engineering in a Changing World | ||||
Publisher: | Engineers Australia | ||||
Official Date: | 2012 | ||||
Dates: |
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Page Range: | pp. 197-202 | ||||
Status: | Not Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 11th Australia - New Zealand Conference on Geomechanics Ground Engineering in a Changing World | ||||
Type of Event: | Conference | ||||
Location of Event: | Melbourne, Australia | ||||
Date(s) of Event: | 15-18 Jul 2012 | ||||
Related URLs: | |||||
Open Access Version: |
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