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Erschienen in: Bulletin of Engineering Geology and the Environment 2/2021

11.11.2020 | Original Paper

Characterization of the interface between concrete pile and coral reef calcarenite using constant normal stiffness direct shear test

verfasst von: Haifeng Liu, Changqi Zhu, Ren Wang, Xiang Cui, Tianmin Wang

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 2/2021

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Abstract

This research aims to study the bearing capacity of pre-bored rock-socketed concrete pile on coral reef calcarenite. Constant normal stiffness direct shear test is performed on the interface between the pile and the coral reef calcarenite sample. Observations are made towards the friction mechanism of the pile-rock interface and the consequent shear dilation behaviors. It is shown that the shear failure occurs exclusively inside the coral reef calcarenite. This is attributed to the diffusion and agglomeration of cement paste in the highly porous coral reef calcarenite during the construction. The shear strength of the pile-rock interface increases as the applied normal stress increases. The dilation of the shear failure surface after the peak strength decreases as the applied normal stress increases. When the applied normal stress amounts to 4 MPa, shrinkage is observed for the shear failure surface. When the pile-rock interface slides, the residual shear strength of the interface increases as the applied normal stress increases. Meanwhile, the curve of the residual shear strength versus the shear displacement is affected by the shape and the roughness of the shear failure surface and it fluctuates under different levels of normal stress.
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Metadaten
Titel
Characterization of the interface between concrete pile and coral reef calcarenite using constant normal stiffness direct shear test
verfasst von
Haifeng Liu
Changqi Zhu
Ren Wang
Xiang Cui
Tianmin Wang
Publikationsdatum
11.11.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
Bulletin of Engineering Geology and the Environment / Ausgabe 2/2021
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI
https://doi.org/10.1007/s10064-020-02039-8

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