Performance of Long-Driven
            <i>H</i>
            -Piles in Granitic Saprolite

So, Arthur K.O.; Ng, Charles Wang Wai

doi:10.1061/(asce)1090-0241(2009)135:2(246)

Cited by 11 publications

(1 citation statement)

References 12 publications

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“…It may differ from the final official version of record. (Ilamparuthi and Dickin 2001), pipe piles (Lee et al 2003), X-shaped piles (Lv et al 2014), rectangular piles (Ng et al 2001), H-piles (So and Ng 2009) and Y-shaped piles (Wang et al 2008). Previous studies have investigated the geometrical effects on piles subjected to applied axial loads, without any relevant work considering the induced dragload, let alone a combination of the two loading conditions.…”

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confidence: 99%

Comparative study of Y-shaped and circular floating piles in consolidating clay

Lam

et al. 2016

Can. Geotech. J.

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Although engineers often make use of pile geometry to improve the axial load capacity of piles, geometrical effects on floating piles in consolidating clay are still not fully understood. This paper reports two centrifuge model tests to investigate the responses of a Y-shaped pile and a circular pile subjected to an induced dragload and applied axial loads. Three-dimensional numerical back-analyses were performed considering the elasto-plastic slip. The Y-shaped and circular piles developed similar downdrag but the dragload induced on the Y-shaped pile was larger than that induced on the circular pile. As the axial load increased, the neutral plane shifted upward along a nonlinear path which gradient of the Y-shaped pile was gentler. The ultimate bearing capacity of the Y-shaped pile was 1.73 times that of the circular pile. The dragload on the Y-shaped and circular piles was eventually eliminated at approximately 0.56 and 0.83 times the corresponding ultimate pile capacities, respectively. Three flanges of the Y-shaped pile "hung-up" adjacent soil which settled together with the pile shaft. The lateral extent of vertically non-uniform trapped soil decreased with increasing axial load. Even though the Y-shaped and circular piles encountered a similar serviceability limit state, Y-shaped pile had advantages in bearing capacity.

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