Analysis of nonlinear settlement for an unsaturated soil under stage continuous loading

A new approach was proposed to describe settlement behavior of an unsaturated soil with subgrade filling for high-speed railway. Firstly, based on Terzaghi consolidation theory, equations considering the variation coefficient of consolidation with void ratio and saturation for consolidation of an un...

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Bibliographic Details
Published in:Journal of Central South University 2014-12, Vol.21 (12), p.4690-4697
Main Authors: Chen, Wei-zhi, Jiang, Guan-lu, Zhao, Hui-shuang, Wu, Li-jun, Li, An-hong
Format: Article
Language:English
Subjects:
Engineering
Metallic Materials
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Summary:A new approach was proposed to describe settlement behavior of an unsaturated soil with subgrade filling for high-speed railway. Firstly, based on Terzaghi consolidation theory, equations considering the variation coefficient of consolidation with void ratio and saturation for consolidation of an unsaturated soil under stage continuous loading were derived, and according to analytical solutions of equations, a formula for settlement computation under stage continuous loading was obtained. Then, combined with the width-to-height ratio of subgrade to compute ground reaction, and by means of in-situ plate loading curves, a correctional approach was presented for the analysis of nonlinear settlement of foundation. Also, the comparison between calculated and measured load-settlement behavior for an unsaturated soil in Qingdao-Ji’nan high-speed railway was given to demonstrate the effectiveness and accuracy of the proposed approach. It can be noted that the presented solution can be used to predict the settlement of an unsaturated soil foundation under stage continuous loading in engineering design.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-014-2478-2