首页|Effects of cement-enhanced soil on the ultimate lateral resistance of composite pile in clayey soil
Effects of cement-enhanced soil on the ultimate lateral resistance of composite pile in clayey soil
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The composite pile consisting of core-pile and surrounding cement-enhanced soil is a promising pile foundation in recent years.However,how and to what extent the cement-enhanced soil influences the ultimate lateral resistance has not been fully investigated.In this paper,the ultimate lateral resistance of the composite pile was studied by finite element limit analysis(FELA)and theoretical upper-bound analysis.The results of FELA and theoretical analysis revealed three failure modes of laterally loaded composite piles.The effects of the enhanced soil thickness,strength,and pile-enhanced soil interface characteristics on the ultimate lateral resistance were studied.The results show that increasing the enhanced soil thickness leads to a significant improvement on ultimate lateral resistance factor(Np),and there is a critical thickness beyond which the thickness no longer affects the Np.Increasing the enhanced soil strength induced 6.2％-232.6％ increase of Np.However,no noticeable impact was detected when the enhanced soil strength was eight times higher than that of the natural soil.The maximum increment of Np is only 30.5％ caused by the increase of interface adhesion factor(α).An empirical model was developed to calculate the Np of the composite pile,and the results show excellent agreement with the analytical results.
Composite pileUltimate soil resistanceFinite element limit analysis(FELA)Plasticity theoryFailure mode
Zhijun Yang、Kexin Chen、Xudong Fu、Zhiyan Zou
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School of Civil Engineering,Wuhan University,Wuhan,430000,China
Changjiang Design Group Co.,Ltd.,Wuhan,430000,China
Institute of Geotechnical Engineering,College of Civil Engineering and Architecture,MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou,310000,China
NETL
NSTL
万方数据
维普
