Mechanism Analysis of GSPS System Strengthening Soft Base

Abstract:

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This paper analyzes the mechanism of geogrid-broken stone pile reinforced sand-gravel cushion soft base strengthening system (GSPS) using finite element based on the substantial project of a expressway in Sichuan province. The calculation results indicate that the GSPS system can significantly improve the vertical displacement (settlement) of subgrade with the vertical displacement around pile decreasing around 15%, and the subgrade displacement tends to be more uniform and smooth. Also, the GSPS system improves the horizontal displacement of subgrade the most compared with the common broken stone-pile, sand cushion and reinforced cushion. The embankment becomes relatively light when it is low, and the main top loads are borne by geogrid-broken stone piles. With the top loads increasing, the loads shift to the soil among piles, and the pile-soil stress ratio increases with the increase of stress level. The test and analysis results show that the value range of pile-soil stress ratio is 1.88~3.40.

Info:

Periodical:

Advanced Materials Research (Volumes 243-249)

Edited by:

Chaohe Chen, Yong Huang and Guangfan Li

Pages:

4248-4252

DOI:

10.4028/www.scientific.net/AMR.243-249.4248

Citation:

Y. Y. Liu et al., "Mechanism Analysis of GSPS System Strengthening Soft Base", Advanced Materials Research, Vols. 243-249, pp. 4248-4252, 2011

Online since:

May 2011

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Price:

$35.00

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