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J4  2014, Vol. 48 Issue (3): 463-470    DOI: 10.3785/j.issn.1008-973X.2014.03.013
    
Analysis for calculation of nonlinear settlement of rigid long-short compound piles
WANG Zhong-jin1,2, XIE Xin-yu1,2,3, FANG Peng-fei3,LI Jin-zhu3, JIN Wei-liang3
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China;
3.College of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
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Abstract  

In order to exactly evaluate the settlement of long-short composite piles, the expressions for the settlement calculation of a single pile were obtained, considering the relative displacement and the nonlinearity of the interaction between pile shaft and surrounding soil. The method was also applied in the layered soils. The interaction factors between the long-short composite piles were modified adopting the calculation method for the interaction factors between piles with different lengths. The interactions among the bases of long-short composite piles were approximately considered using the Mindlin's solution for displacement. Then the settlement for a pile in the long-short pile groups was obtained. The proposed method for the settlement calculation of a single pile was validated by an engineering example, and the calculation results were in good coincidence with the measured data field test. The properties of the long-short composite piles obtained by the proposed method were in coincidence with those obtained by the ABAQUS, and the comparisons show that the proposed method is feasible.



Published: 10 June 2018
CLC:  TU 473.1  
Cite this article:

WANG Zhong-jin, XIE Xin-yu, FANG Peng-fei,LI Jin-zhu, JIN Wei-liang. Analysis for calculation of nonlinear settlement of rigid long-short compound piles. J4, 2014, 48(3): 463-470.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.03.013     OR     http://www.zjujournals.com/eng/Y2014/V48/I3/463


刚性长短组合桩的非线性沉降计算分析

为了更加准确地预测长短组合桩基的沉降,考虑桩土相对位移、桩-土接触力学行为的非线性,推导均质土层中单桩的沉降计算公式,并应用于成层土中.基于计算不同桩长相互作用系数的方法修正了长短桩桩顶相互作用系数,应用Mindlin位移解计算求得长短组合桩桩端相互作用系数,从而得到长短组合桩基中单桩的沉降.结合某工程实例对单桩沉降计算方法进行验证,计算结果和实测结果吻合较好;由该方法计算得到长短组合桩的受力性状与ABAQUS有限元计算结果较吻合,验证了该方法的正确性.

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