Experimental and numerical investigation on the short- and long-term mechanical properties of mylonite before and after grouting reinforcement
文献类型：期刊论文
| 作者 | Li, Hui1; Gao, Hou1,3; Chen, Weizhong1; Yu, Hongdan1; Tian, Hongming1; Lu, Chen2; Zhang, Zheyuan1,3 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2024 |
| 卷号 | 83期号:1页码:18 |
| 关键词 | Short- and long-term properties, Grouting, Mylonite, Numerical analysis |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-023-03501-z |
| 英文摘要 | Accurate determination of physical and mechanical properties of rock mass is essential for stability evaluation and structural design. To evaluate the stability of bridge foundation buried in the mylonite, a series of laboratory experiments about the short- and long-term properties were studied, and the grouting effect by the mixture of cement slurry and rock was also discussed. Then, numerical analysis was carried out to discuss the factors affecting the stability of the bridge foundation. Results show that the strength and deformation modulus are 0.32 MPa and 26.65 MPa for the natural rock cores. From the results of triaxial compression tests of the reconstituted specimens, the increasing of confining stress can strengthen the rock mass, leading to the improvement of strength and deformation modulus. The deformation of specimens under step loads includes instantaneous strain, visco-elastic deformation, and steady-state creep stage. A further increment of stress may result in ductile failure. In addition, the grouting samples with different filling ratios of cement slurry were studied, indicating that affected by the property of cement slurry, the strength increases linearly with the filling ratio, and the deformation modulus increases exponentially with that. The strength was significantly improved than natural rock core. Besides, the effect of grouting on the stability of bridge foundation was also investigated by FEM, which indicated that less deformation of cushion cap and piles was observed. Therefore, it reveals the effectiveness of the method to guarantee the safe construction of the bridge pier. |
| 资助项目 | National Natural Science Foundation of China |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001138628300002 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40332]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Chen, Weizhong |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Fujian Prov Highway Dev Ctr, Fuzhou 350004, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hui,Gao, Hou,Chen, Weizhong,et al. Experimental and numerical investigation on the short- and long-term mechanical properties of mylonite before and after grouting reinforcement[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2024,83(1):18. |
| APA | Li, Hui.,Gao, Hou.,Chen, Weizhong.,Yu, Hongdan.,Tian, Hongming.,...&Zhang, Zheyuan.(2024).Experimental and numerical investigation on the short- and long-term mechanical properties of mylonite before and after grouting reinforcement.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,83(1),18. |
| MLA | Li, Hui,et al."Experimental and numerical investigation on the short- and long-term mechanical properties of mylonite before and after grouting reinforcement".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83.1(2024):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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