Centrifuge test on single pile with different rigidities in saturated clay under cyclic lateral loading

LI Sen; YU Jian; HUANG Mao-song

doi:10.11779/CJGE202105020

Volume 43 Issue 5

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Chinese Journal of Geotechnical Engineering > 2021 > 43(5): 948-954. > DOI: 10.11779/CJGE202105020

LI Sen, YU Jian, HUANG Mao-song. Centrifuge test on single pile with different rigidities in saturated clay under cyclic lateral loading[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(5): 948-954. DOI: 10.11779/CJGE202105020

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Centrifuge test on single pile with different rigidities in saturated clay under cyclic lateral loading

LI Sen^{1, 3, 4,},
YU Jian^{1, 2},
HUANG Mao-song^{1, 2, ,}

1.
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
2.
Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
3.
CCCC Third Harbor Engineering Co., Ltd., Shanghai 200032, China
4.
CCCC Key Laboratory of Structural Engineering, Shanghai 200032, China

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Received Date: August 02, 2020
Available Online: December 04, 2022

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Abstract

Abstract

The centrifuge tests are carried out to investigate the static and cyclic lateral bearing behaviors of single pile with different pile-soil relative rigidities in normal consolidated clay. Under the same soil and pile-buried depth condition, the pile-soil relative rigidity is tuned by adjusting the model pile material and the section geometric parameter. The comparison group includes rigid pile, flexible pile and semi-rigid pile. Before the loading tests, the cyclic T-bar tests are performed, with the results indicating that the clay strength profile and softening parameter of each test are consistent, verifying the reliability of sample preparation. Both the initial stiffness and the ultimate bearing capacity of the normalized load-displacement curve of piles increase with the increase of pile-soil relative rigidity factor, which indicates that the pile-soil relative rigidity factor can be used to describe the static bearing behavior of the laterally loaded pile. Although the rigid pile is more affected under cyclic loading, its cyclic stable stiffness is still significantly larger than that of a flexible pile. The ratio of cyclic stable stiffness to static stiffness decreases under the increasing pile-soil relative rigidity factor. From the perspective of long-term stiffness control, increasing the pile diameter is not conducive to stable performance, which can be improved by increasing the pile-buried depth.
- saturated clay,
- laterally loaded pile,
- cyclic loading,
- pile-soil relative rigidity

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References (19)

References

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