Secondary Compression Features of Jiangsu Soft Marine Clay |
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| Authors: | Linchang Miao Edward Kavazanjian Jr |
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| Institution: | 1. Institute of Geotechnical Engineering, Southeast University , Nanjing, P. R. China Lc.miao@seu.edu.cn Lc.miao@jlonline.com;3. Department of Civil and Environmental Engineering , Arizona State University , AZ |
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| Abstract: | The results of one-dimensional compression tests conducted on undisturbed specimens of Jiangsu soft marine clay is presented. Because of its high in situ void ratios and natural water content, Jiangsu soft marine clay displays high values of both the virgin compression index, Cc, and the secondary compression coefficient, Cα. The laboratory data indicates that the value of the ratio Cα/Cc for Jiangsu soft marine clay is constant. However, neither Cα nor Cc are constant: they both depend upon the natural water content (or void ratio) and thus are also dependent on the deformation (or compression) of Jiangsu soft marine clay. Settlement analyses show that the secondary settlement of Jiangsu soft marine clay is a significant component of the field settlement. The concept of a constant value for Cα/Cc is used to predict the secondary settlement of a surcharged embankment founded upon Jiangsu soft marine clay. The predictions are in agreement with the limited post-construction field measurements of the embankment settlement. |
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| Keywords: | consolidation creep secondary compression soft marine clay |
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