Centrifuge modeling tests of seismic behaviour of helical piles in dry sand
Chunhui Liu, Lijun Deng, Cheng Wang, Yongzhi Wang
Dans les comptes rendus d’articles de la conférence: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Foundations 1
ABSTRACT: Helical piles are often used in earthquake-prone zones, but the seismic performance of helical piles remains relatively understudied. This research presents a centrifuge shaking table test program for both helical piles and smooth piles embedded in layered dry sand. The specific objectives of this study encompass investigating the axial load redistribution caused by seismic shaking and examining the lateral response behavior of helical piles. Four single-helix piles were installed, where the helical plates were embedded into a dense sand layer to mimic the practical working condition of helical piles. Accelerometers, displacement transducers, and strain gauges were utilized to measure the dynamic response of both helical piles and the surrounding soil during earthquakes. Based on the experimental results, the predominant periods of soil and helical piles were evaluated, and the response of both soil and piles was interpreted. Soil and pile settlements during earthquakes were observed, along with variations in axial loads during the shaking sequence. Additionally, the distribution of bending moments was presented to illuminate the distinctive behavior of helical piles compared to conventional smooth piles.
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Liu, Chunhui, Deng, Lijun, Wang, Cheng, Wang, Yongzhi (2023) Centrifuge modeling tests of seismic behaviour of helical piles in dry sand in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Liu_GEO2023_4,
author = {{Liu, Chunhui}, {Deng, Lijun}, {Wang, Cheng}, {Wang, Yongzhi}}
title = {Centrifuge modeling tests of seismic behaviour of helical piles in dry sand }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Centrifuge modeling tests of seismic behaviour of helical piles in dry sand }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }