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New Frontiers in Engineering Geology and the EnvironmentOn the Using of Deformation Rates as Stability Control Parameters of PVD-Treated Soft Ground

New Frontiers in Engineering Geology and the Environment: On the Using of Deformation Rates as... [The monitoring data of a real project in Shanghai show that using of displacement rates (vertical settlement rate at the center of embankment and the horizontal displacement rate at the toe of the embankment) as control parameters failed to give correct evaluation on the stability state of the PVD-treated soft ground. Embankments were stable at early construction stage when the observed deformation rates exceeded the control values, but suddenly collapsed even when observed deformation rates were lower than the control values. It is thought the complicated construction process used in field, degradation of the PVD drainage performance, and plastic hardening of soft soil caused by consolidation are maybe the reasons that caused this “abnormal phenomena”. Because of the complexity of the displacement rates of PVD-treated soft ground, this traditional method should be used by caution. High quality ground stability analysis is essential for helping to make correct evaluation of the stability of PVD-treated soft ground. ] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

New Frontiers in Engineering Geology and the EnvironmentOn the Using of Deformation Rates as Stability Control Parameters of PVD-Treated Soft Ground

Part of the Springer Geology Book Series
Editors: Huang, Yu; Wu, Faquan; Shi, Zhenming; Ye, Bin

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References (3)

Publisher
Springer Berlin Heidelberg
Copyright
© Springer-Verlag Berlin Heidelberg 2013
ISBN
978-3-642-31670-8
Pages
275 –278
DOI
10.1007/978-3-642-31671-5_50
Publisher site
See Chapter on Publisher Site

Abstract

[The monitoring data of a real project in Shanghai show that using of displacement rates (vertical settlement rate at the center of embankment and the horizontal displacement rate at the toe of the embankment) as control parameters failed to give correct evaluation on the stability state of the PVD-treated soft ground. Embankments were stable at early construction stage when the observed deformation rates exceeded the control values, but suddenly collapsed even when observed deformation rates were lower than the control values. It is thought the complicated construction process used in field, degradation of the PVD drainage performance, and plastic hardening of soft soil caused by consolidation are maybe the reasons that caused this “abnormal phenomena”. Because of the complexity of the displacement rates of PVD-treated soft ground, this traditional method should be used by caution. High quality ground stability analysis is essential for helping to make correct evaluation of the stability of PVD-treated soft ground. ]

Published: Jun 11, 2012

Keywords: Soft soil; Deformation rate; Stability; PVD-treated soft ground

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