Shaft capacity of pre-bored grouted planted nodular pile under various overburden pressures in dense sand |
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| Authors: | Zhou Jia-Jin Gong Xiao-Nan Zhang Ri-Hong Wang Kui-Hua Yan Tian-Long |
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| Institution: | 1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, China;2. zhangrihong5@hotmail.com;4. Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo, China;5. ZCONE High-tech Pile Industry Holdings CO., LTD, Ningbo, China;6. ZCONE High-tech Pile Industry Holdings CO., LTD, Ningbo, China |
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| Abstract: | AbstractThis paper presents the results of a series of model tests performed to study the shaft capacity of pre-bored grouted planted nodular (PGPN) pile in dense sand. The influence of the vertical overburden pressure on the shaft capacity of the PGPN pile is also investigated based on the test results. The test piles were equipped with strain gauges to measure the axial loads during the loading process, moreover, a foam plate was buried beneath pile tip to eliminate the influence of tip resistance on the shaft capacity. Some conclusions can be drawn based on the test results: the peak skin friction of PGPN pile increases with the increase of vertical overburden pressure applied on the foundation soil, while the rate of increase decreases with the increasing overburden pressure; the surface of the pile–soil interface of PGPN pile is relatively rough, and significant dilatant increase in lateral stress occurs during the loading process. |
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| Keywords: | Pre-bored grouted planted nodular pile shaft capacity dense sand cemented soil–sand interface overburden pressure |
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