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M. Cao
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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AN INNOVATIVE APPROACH TO EVALUATE THE BEHAVIOUR OF VERTICALLY LOADED PILE GROUPS BASED ON ELASTIC THEORY M. Cao; L. Z. Chen; S. L. Chen
Lowland Technology International Vol 9 No 1, June (2007)
Publisher : International Association of Lowland Technology

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Abstract

An efficient analytical approach is proposed to calculate the settlement of a pile group under vertical loads. The proposed approach is based on the superposition of the displacement of individual pile. In the superposition calculation, an interaction factor, which was determined using the technique by Muki and Sternberg, is employed to facilitate the analysis of pile groups subjected to static vertical loads. The proposed interaction factor can consider the strengthening effect of intervening piles. The solution of the proposed approach is compared with other existing solutions. Their difference in estimating the behaviour of pile groups is investigated. Finally, numerical examples on two pile groups are presented to discuss the influence of dimensionless pile and soil parameters on the behaviour of pile groups. The results show that the proposed approach gives a more reasonable analysis on pile groups.
Laterallyloaded piles in multi-layered soils M. Cao
Lowland Technology International Vol 19 No 2, Sep (2017)
Publisher : International Association of Lowland Technology

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Abstract

The paper presents a rigorous analytical method, using the theory of the transfer matrix method for calculating the laterally loaded piles in multi-layered soils. Following the technique proposed by Muki and Sternberg, the problem is decomposed into extended layered soils and a fictitious pile characterized respectively by Young’s moduli of the layered soils and those of the differences between the piles and the layered soils. The unknown bending moments along the fictitious pile are determined by solving a Fredholm integral equation of the second kind, which imposes the compatibility condition that the lateral displacements of the fictitious pile are equal to those corresponding to the centroidal axe of the extended layered soils. The pile lateral displacement and slope distributions can be calculated based on the determined fictitious pile bending moment distribution. Selected results from parametrical studies are presented to confirm the validity of the proposed approach and to portray the influence of the governing parameters on the pile bending moment, displacement and slope distributions.
Co-Authors L. Z. Chen S. L. Chen