Uniaxial shear test and mesoscopic numerical simulation of cemental soil based on PFC2D method

Authors

YANG Zhihui, Nanning Vocational and Technical University, Nanning, Guangxi 530003, ChinaFollow
LI Shanhua, Nanning Vocational and Technical University, Nanning, Guangxi 530003, China

Abstract

Uniaxial compression tests were carried out on stable soft soil samples with different cement contents. Based on the test results, a mesoscopic numerical simulation of PFC2D discrete element particle flow during soil sample deformation was conducted to analyze the mechanical behavior and displacement field distribution of cement soil after failure. The results show that with the increase in cement content, the uniaxial shear strength and elastic modulus of the solidified soft soil sample show an exponential function and rise, and the failure strain shows a quadratic function with the increase in cement content. The mechanical parameters and stress-strain curves of cement soil samples obtained by PFC2D discrete element particle flow simulation are close to the test results, and the discrete element simulation results show that the cement content has a significant effect on the mechanical properties of soil. With the increase in cement content, the failure mode of solidified soft soil gradually changes from crushing failure to shear failure. The displacement vector field obtained by discrete element simulation accurately reflects the failure mode characteristics of cement-solidified soft soil under uniaxial compression load.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.033

First Page

189

Last Page

193

Submission Date

March 2025

Recommended Citation

Zhihui, YANG and Shanhua, LI (2023) "Uniaxial shear test and mesoscopic numerical simulation of cemental soil based on PFC2D method," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 33.
DOI: 10.14048/j.issn.1671-2579.2023.01.033
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/33