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Geotechnical and Geological Engineering

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27-05-2023 | Original Paper

Influence of Particle Gradation and Penetration Velocity on Deformation Behavior of Sandy Soil Based on CPT

Authors: Jianbin Cui, Liangfu Xie, Jianhu Wang, Liling Zhu, Yongjun Qin

Published in: Geotechnical and Geological Engineering | Issue 6/2023

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Abstract

The particle gradation seriously affects the physical and mechanical parameters and engineering properties of sandy soil. Considering the influence of particle gradation, the cone penetration test is simulated by using Particle Flow Code (PFC^3D), and the results are analyzed from three aspects: cone resistance, contact force chain and soil disturbance range. At the same time, the influence of penetration velocity is analyzed. Results show that: (1) The maximum cone resistance decreases monotonically with the increase of the proportion of fine particles, and the change curve of this trend is obtained. (2) During the sinking process of the cone penetrometer, the tension zone of the force chain is mainly distributed in the free face and the soil around the cone head. The increase of the proportion of fine particles will significantly weaken the tensile effect of these two parts, and the tensile effect of the unpenetrated soil under the cone head is also significantly weakened. (3) The deformation range and contact quantity of soil increase with the growth of the proportion of fine particles, which is also the main reason for the obvious decrease of cone resistance. The maximum disturbance range of soil depends on fine particles. When the proportion of fine particles exceeds 10%, the range of disturbed soil and cone resistance are basically unchanged. (4) Without considering the influence of excess pore water pressure, the penetration velocity has little effect on the test results.

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Title: Influence of Particle Gradation and Penetration Velocity on Deformation Behavior of Sandy Soil Based on CPT
Authors: Jianbin Cui
Liangfu Xie
Jianhu Wang
Liling Zhu
Yongjun Qin
Publication date: 27-05-2023
Publisher: Springer International Publishing
Published in: Geotechnical and Geological Engineering / Issue 6/2023
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-023-02480-y

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