Experimental Study on Permanent Deformation of Fine Sandy Subgrade Filling in Coastal Region

Abstract:

By using repeated load triaxial test method, test results of permanent strain of fine sand were obtained. The main factors affecting permanent strain of fine sand samples are water content, degree of compaction and deviator stress. Permanent strain of sand is less sensitive to moisture when compared to clay and silt. Well compacted fine sand subgrade is less affected by the change of water content, which illustrates a more stable long-term performance. Analyze from meso-structure, the ellipsoid shaped particle is less stable than sphere shaped one under the effect to repeated load. Fine sand with smaller amount of ellipsoid shaped particle would have better dynamic behaviors. Predicting models of permanent strain with basic soil physical properties were established using regression analysis.

• Periodical: Key Engineering Materials (Volume 814)
• Pages: 419-424
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.814.419
• Online since: July 2019
• Authors: Ding Zhou*
• Keywords: Deformation, RLT, Sand, Subgrade

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