Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway

ZHANG Feng; LIU Ying; XU Zhaoyi; LI Zhiyi

doi:10.3969/j.issn.0258-2724.2015.05.003

Volume 28 Issue 5

Oct. 2015

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Journal of Southwest Jiaotong University > 2015 > 28(5): 783-788.

ZHANG Feng, LIU Ying, XU Zhaoyi, LI Zhiyi. Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 783-788. doi: 10.3969/j.issn.0258-2724.2015.05.003

Citation:

ZHANG Feng, LIU Ying, XU Zhaoyi, LI Zhiyi. Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 783-788. doi: 10.3969/j.issn.0258-2724.2015.05.003

Citation:

ZHANG Feng, LIU Ying, XU Zhaoyi, LI Zhiyi. Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 783-788. doi: 10.3969/j.issn.0258-2724.2015.05.003

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Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway

doi: 10.3969/j.issn.0258-2724.2015.05.003

Received Date: 03 Jun 2015
Publish Date: 25 Oct 2015

Abstract

Abstract

In order to study the post-construction settlement of CFG(cement flyash gravel)pile composite foundation of high speed railway in soft soilI areas, finite element numerical simulations were made using ABAQUS software for several factors that influence the post-construction settlement of the CFG pile composite foundation in Wuhan-Guangzhou high-speed railway. On this basis, the influence degree and variation of each factor on the settlement was discussed to determine the main control factors of the settlement. The result shows that an increase in the elastic modulus or pile diameter will result in an increase in the stress ratio of pile to soil, and increasing the cushion thickness will decrease the stress ratio of pile to soil. When a combination of reinforced concrete pipe piles and CFG piles is used, the maximum settlement on the pile top is 2.01 mm, and uneven settlement is decreased by 46.5% compared with that using reinforced concrete pipe piles only.
- soft soils,
- composite foundation,
- settlement,
- influencing factors

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Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway

doi: 10.3969/j.issn.0258-2724.2015.05.003

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Factors Influencing Subgrade Post-Construction Settlement of CFG Pile Composite Foundation in Wuhan-Guangzhou High-Speed Railway

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