STUDY ON THE NEW PRECAST CIRCULAR-PLATE PILE CAP IN THE CFG PILE COMPOSITE FOUNDATION OF HIGH-SPEED RAILWAY

Tu Yongming; Zhang Jiwen; Zeng Juncheng

doi:10.13204/j.gyjz200812021

Volume 38 Issue 12

Dec. 2014

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Tu Yongming, Zhang Jiwen, Zeng Juncheng. STUDY ON THE NEW PRECAST CIRCULAR-PLATE PILE CAP IN THE CFG PILE COMPOSITE FOUNDATION OF HIGH-SPEED RAILWAY[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(12): 80-83. doi: 10.13204/j.gyjz200812021

Citation:

Tu Yongming, Zhang Jiwen, Zeng Juncheng. STUDY ON THE NEW PRECAST CIRCULAR-PLATE PILE CAP IN THE CFG PILE COMPOSITE FOUNDATION OF HIGH-SPEED RAILWAY[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(12): 80-83. doi: 10.13204/j.gyjz200812021

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STUDY ON THE NEW PRECAST CIRCULAR-PLATE PILE CAP IN THE CFG PILE COMPOSITE FOUNDATION OF HIGH-SPEED RAILWAY

doi: 10.13204/j.gyjz200812021

1.
Key Lab of C&PC Structure of Ministry of Education,Southeast University Nanjing 210096

Received Date: 2007-09-10
Publish Date: 2008-12-20

Abstract

Abstract

The field tests on new precast circular-plate pile caps in the CFG pile composite foundation of high-speed railway were carried out. The results show that the bearing capacity of pile caps is dependent on their flexural behavior. The flexural cracks develop in diameter directions on the top surfaces of the caps,while extend downwards on the side faces,with wide upper part and narrow lower part. The calculated flexural cracking loads are consistent with the field test results,which indicates that the FLAC model and the simplified method in this paper are effective. All of the four types of pile caps can satisfy the load-bearing capacity requirements,and the safety factors are 1.33,1.76,2.38 and 3.11,respectively.
- CFG pile,
- composite foundation,
- precast circular-plate pile cap,
- field test

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References(4)

References

雷金波,姜弘道,郑云扬,等.带帽桩复合地基复合桩土应力比的计算及影响因索分析.岩土工程学报,2005,27(11):1 300-1 305

[2] 朱世哲,徐日庆,杨晓军,等.带垫层刚性桩复合地基桩土应力比的计算与分析.岩土力学,2004,25(5):814-817

[3] 董必昌,郑俊杰.CFG桩复合地基沉降计算方法研究.岩石力学与工程学报,2002,21(7):1 084-1 086

[4] 阎明礼,张东刚.CFG桩复合地基技术及工程实践.北京:中国水利水电出版社,2001

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