Field Study of Improvement Mechanism of Geogrid-Reinforced and Pile-Supported Embankment

Abstract:

Two experimental areas in a highway soft soil ground treatment project in Guangdong Province were designed to investigate the improvement mechanism of geogrid-reinforced and pile-supported embankment(GRPS).The experimental results showed: In End-bearing Pile Area,the differential settlement between pile and soil was bigger than that of Floating Pile Area,so the bearing capacity of soil was exerted to a certain extent in Floating Pile Area. The bearing efficacy of soil below the pile cap was little, so the replacement ratio of composite foundation could be calculated according to the pile cap dimension. The load transfer efficacy of the geogrid was better than that of the soil arch. Five kinds of methods were used to evaluate the soil arch in the fill and it was indicated that the results calculated by the BS8006 method and Carlsson method was close to the experimental data which was smaller than results calculated by Hewlett method and Terzaghi method, bigger than Guido method. Through the analysis of the pile-soil stress ratio, the improvement mechanism of the two types of GRPS were revealed.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 928-933
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.928
• Online since: July 2014
• Authors: Feng Lian*, Zhi Liu, Jie Xu, Qiang Wang, Xian Hu Hu, Hao Wu
• Keywords: Embankment, Field Study, GRPS, Improvement Mechanism

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