An Analysis on Failure Pattern of CFG Pile-Net Composite Foundation of High-Speed Railway

Dan Ping Jiang; Bing Long Wang

doi:10.4028/www.scientific.net/AMR.594-597.1357

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 594-597An Analysis on Failure Pattern of CFG Pile-Net...

An Analysis on Failure Pattern of CFG Pile-Net Composite Foundation of High-Speed Railway

Abstract:

CFG pile-net composite foundation has the advantages of small post construction settlement and uneven settlement, easy control of construction quality and fast construction speed. It`s widely used in subgrade engineering of high-speed railway. However, in coastal soft soil area, phenomena like breaking pile, collapsed embankment, cracking in embankment surface, undue settlement or convergence appeared in many places where railway CFG pile was improved during the foundation treatment, filling and preloading. Four numerical calculations were performed to investigate the failure pattern of CFG pile-net composite foundation with FLAC3D ( Fast Lagrangian Analysis of Continua, 3 dimensions) software. The paper describes four failure pattern, they are slip circle shear failure, pile tilt failure, roadbed sliding, soil sliding at pile end respectively through the analysis of the embankment and pile displacement as well as embankment deformation.

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Periodical:

Advanced Materials Research (Volumes 594-597)

Pages:

1357-1362

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.594-597.1357

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Online since:

November 2012

Authors:

Dan Ping Jiang, Bing Long Wang

Keywords:

CFG Pile, Composite Foundation, Failure Pattern, High-Speed Railway (HSR)

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