Experimental and Numerical Simulations on the Mechanical Characteristics of Soil-Rock Mixture in Uniaxial Compression
文献类型：期刊论文
| 作者 | Zhang, Zhenping2,3; Fu, Xiaodong1,3; Sheng, Qian1,3; Wang, Shuo2; Fang, Yuwei4 |
| 刊名 | APPLIED SCIENCES-BASEL
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 14期号:22页码:20 |
| 关键词 | soil-rock mixture uniaxial compression test uniaxial compressive strength irregular rock block failure mechanism |
| DOI | 10.3390/app142210485 |
| 英文摘要 | Soil-rock mixture is a common geo-material found in natural deposit slopes and various constructions, such as tunnels, hydropower stations, and subgrades. The complex mechanical characteristics of soil-rock mixture arise from its multi-phase compositions and cooperative interactions. This paper investigated the mechanical properties of soil-rock mixture, focusing on the influence of rock content, and soil-rock interface strength was discussed. Specimens with varying rock contents were subjected to uniaxial compression tests. The results indicated that rock content, as a key structural parameter, significantly controls the crack propagation trends. As rock content increases, the initial structure of the soil matrix is damaged, leading to the formation of a weak-strength soil-rock interface. The failure mode transitions from longitudinal cracking to multiple shear fractures. To analyze the strength of the soil-rock interface from a mesoscopic perspective, simulations of soil-rock mixture specimens with irregular rock blocks were conducted using the particle discrete element method (PDEM). At the meso-scale, the specimen with 30% rock content exhibited a complex particle displacement distribution, with differences in the direction and magnitude of displacement between soil and rock particles being critical to the failure modes of the specimen. As the soil-rock interface strength increased from 0.1 to 0.9, the distribution of force chains within the specimen shifted from a centralized to a more uniform distribution, and the thickness of force chains became increasingly uniform. The strength responses of the soil-rock mixture under uniaxial compression condition were discussed, revealing that the uniaxial compression strength (UCS) of soil-rock mixture decreases exponentially with increasing rock content. An estimation formula was developed to characterize the UCS of soil-rock mixture in relation to rock content and interface strength. The findings from both the experiments and simulations can provide valuable insights for evaluating the stability of deposit slopes and other constructions involving soil-rock mixture. |
| 资助项目 | Open Research Fund of the State Key Laboratory of Geohazard Prevention and Geo-environment Protection ; Key R&D Program of Yunnan Province[202303AA080010] ; Natural Science Foundation[2023-BSBA-261] ; Basic Research Program of Liaoning Provincial Department of Education[LJ212410142010] ; Youth Innovation Promotion Association CAS[2021325] ; National Natural Science Foundation of China[52409137] ; National Natural Science Foundation of China[52179117] ; [SKLGP2022K010] |
| WOS研究方向 | Chemistry ; Engineering ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001366917500001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43274]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Fu, Xiaodong |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Shenyang Univ Technol, Sch Architecture & Civil Engn, Shenyang 110870, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Yunnan Inst Transport Planning & Design Co Ltd, Kunming 650200, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhenping,Fu, Xiaodong,Sheng, Qian,et al. Experimental and Numerical Simulations on the Mechanical Characteristics of Soil-Rock Mixture in Uniaxial Compression[J]. APPLIED SCIENCES-BASEL,2024,14(22):20. |
| APA | Zhang, Zhenping,Fu, Xiaodong,Sheng, Qian,Wang, Shuo,&Fang, Yuwei.(2024).Experimental and Numerical Simulations on the Mechanical Characteristics of Soil-Rock Mixture in Uniaxial Compression.APPLIED SCIENCES-BASEL,14(22),20. |
| MLA | Zhang, Zhenping,et al."Experimental and Numerical Simulations on the Mechanical Characteristics of Soil-Rock Mixture in Uniaxial Compression".APPLIED SCIENCES-BASEL 14.22(2024):20. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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