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Journal of Zhejiang University SCIENCE A 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/jzus.A2300384


Model test study on the influence of the penetration of adjacent XCC pile on the existing XCC pile in sand


Author(s):  Peng ZHOU, Jianhui XU, Changjie XU, Guangwei CAO, Jie CUI, Xuanming DING

Affiliation(s):  School of Civil Engineering and Architecture, State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China; more

Corresponding email(s):   m_ma123@163.com

Key Words:  X-section Cast-in-place Concrete pile, Tests, Penetration, Sand, Lateral response, Radial stress


Peng ZHOU, Jianhui XU, Changjie XU, Guangwei CAO, Jie CUI, Xuanming DING. Model test study on the influence of the penetration of adjacent XCC pile on the existing XCC pile in sand[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .

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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300384"
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A1 - Xuanming DING
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Abstract: 
A series of small-scale 1g X-section Cast-in-place Concrete (XCC) pile-penetration model tests were conducted to study the effects of soil density and pile geometry on the lateral responses of an existing pile and the variations in surrounding soil stress. The results showed that the bending patterns of existing XCC piles varied with penetration depth. The lateral response of the existing pile was sensitive to the change in relative density and pile geometry. For example, the bending moment of the existing pile increased along with these parameters. The development of the radial stress σ'r/σ'v0 of the soil around an existing pile showed different trends at various depths during the penetration of the adjacent pile. Moreover, the change in radial stress during the penetration of the XCC pile did not exhibit the “h/R effect” that was observed in the free-field soil, due to the shielding effect of the existing piles. The peak value of radial stress σ'r_max/σ'v0 decreased exponentially as the radial distance r/R increased. The attenuation of σ'r_max/σ'v0 with r/R in the loose sand was faster than in the medium-dense or dense sands. The σ'r_max/σ'v0 at the same soil location increased with the cross-section geometry parameter.

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