EXPERIMENTAL STUDY ON BEARING PERFORMANCE OF STEEL PIPE PILE COMPOSITE FOUNDATION CONSTRUCTED BY TOP- DOWN METHOD UNDER VERTICAL LOADS

Zhou Ruxia; Gong Weiming; Yang Le; Bai Ping

doi:10.13204/j.gyjz201204019

Volume 42 Issue 4

Dec. 2014

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2012 > 42(4): 89-94

CHEN Tianlei, NIU Mengshi, XIE Sa. “FATTING PILE EFFECT” AND CHANGE LAWS OF COLLAPSIBLE COEFFICIENTS COMPACTED WITH SDS PILES IN SELF-WEIGHT COLLAPSE LOESS FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(6): 6-10. doi: 10.13204/j.gyjz202006002

Citation:

Zhou Ruxia, Gong Weiming, Yang Le, Bai Ping. EXPERIMENTAL STUDY ON BEARING PERFORMANCE OF STEEL PIPE PILE COMPOSITE FOUNDATION CONSTRUCTED BY TOP- DOWN METHOD UNDER VERTICAL LOADS[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(4): 89-94. doi: 10.13204/j.gyjz201204019

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EXPERIMENTAL STUDY ON BEARING PERFORMANCE OF STEEL PIPE PILE COMPOSITE FOUNDATION CONSTRUCTED BY TOP- DOWN METHOD UNDER VERTICAL LOADS

doi: 10.13204/j.gyjz201204019

1.
1. School of Civil Engineering,Southeast University,Nanjing 210096,China;
2.
2. Nantong Highway Administration,Nantong 226001,China;
3.
3. Huatian Engineering &Technology Corporation,MCC,Nanjing 210096,China

Received Date: 2011-10-23
Publish Date: 2012-04-20

Abstract

Abstract

Model tests were designed to investigate the bearing capacity properties of composite steel pipe pile foundations in sandy soil. Results indicated that:To a single pile composite foundation,the load was totally carried by ground under the cap before sealing piles. Then,after sealing,the pile started to work and the pile-soil load share ratios were between 73. 5% ～ 92% before reaching ultimate bearing capacity. As vertical load increased continually to the capacity limit,the ratio reduced obviously. To a composite foundation with 8 steel pipe piles was tested,the attenuation gradient of axial load was larger in the middle and lower parts rather than the upper part during axial load transfer. The rates of the corner piles were biggest,then the side piles. The side frictional resistances developed gradually from the top to the bottom and the maximum value reached at the distance of 1. 55 m below the top. At every load step,the resistances of the corner piles were greater than that of side piles. Moreover,the ultimate bearing capacity of the steel pipe pile composite foundation was significantly higher than that of the high-rise cap pile group foundation.
- steel pile,
- the top-down method,
- caps,
- share of load,
- settlement

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References(7)

References

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[5] 宰金珉. 复合桩基理论与应用[M]. 北京:知识产权出版社，2004.

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