Study on Failure Mechanism of Soil–Rock Slope with FDM-DEM Method

Yanni Zheng (), Lifeng Zheng, Huyue Zhan, Qingfu Huang, Chaojun Jia and Zhong Li
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Yanni Zheng: School of Civil Engineering, Central South University, Changsha 410075, China
Lifeng Zheng: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources, Beijing 100048, China
Huyue Zhan: Huaneng Lancang River Hydropower Co., Ltd., Kunming 650214, China
Qingfu Huang: China Power Construction Group Kunming Survey, Design and Research Institute Co., Ltd., Kunming 650051, China
Chaojun Jia: School of Civil Engineering, Central South University, Changsha 410075, China
Zhong Li: Hunan Tieyuan Civil Engineering Testing Co., Ltd., Changsha 410075, China

Sustainability, 2022, vol. 14, issue 24, 1-18

Abstract: A discrete-continuous coupling analysis method based on FLAC2D/PFC2D is established with the help of the program’s own FISH language and Socket O/I data transfer interface. According to the statistical characteristics of the mesostructure of the slope site, the computer stochastic simulation method is used to construct the mesostructure model of the soil–rock mixture in the discrete domain. The deformation and failure mechanism of the SRM slope is studied by using the established discrete-continuous coupled analysis method. The results show that the statistical distribution of the mesoscopic contact characteristics (such as contact direction and contact force) between soil and rock particles inside the slope changes and adjusts significantly. Among them, the main direction of the statistical distribution is adjusted most significantly, and the main direction is finally adjusted to being basically the same as the sliding direction of the slope. The change in the mesoscopic contact characteristics between soil and rock particles is the internal driving factor for the macroscopic deformation of the slope and the adjustment of the stress state.

Keywords: FDM-DEM coupling; SRM slope; failure mechanism; irregular stone blocks; meso-contact (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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