The Fracture Evolution Mechanism of Tunnels with Different Cross-Sections under Biaxial Loading
文献类型：期刊论文
| 作者 | Jia, Lexin2,3; Qiu, Shili3; Cong, Yu1; Wang, Xiaoshan1 |
| 刊名 | PROCESSES
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 12期号:5页码:24 |
| 关键词 | elliptical chamber section shape fracture evolution DIC |
| DOI | 10.3390/pr12050891 |
| 英文摘要 | Biaxial compression tests based on an elliptical tunnel were conducted to study the failure characteristics and the meso-crack evolution mechanism of tunnels with different cross-sections constructed in sandstone. The progressive crack propagation process around the elliptical tunnel was investigated using a real-time digital image correlation (DIC) system. Numerical simulations were performed on egg-shaped, U-shaped, and straight-walled arched tunnels based on the mesoscopic parameters of the elliptical tunnel and following the principle of an equal cross-sectional area. The meso-crack evolution and stress conditions of the four types of tunnels were compared. The results show that (1) fractures around an elliptical tunnel were mainly distributed at the end of the long axis and mainly induce slabbing failure, and the failure mode is similar to a V-shaped notch; (2) strain localization is an important characteristic of rock fracturing, which forebodes the initiation, propagation, and coalescence paths of macro-cracks; and (3) the peak loads of tunnels with egg-shaped, U-shaped, and straight-walled arched cross-sections are 98.76%, 97.56%, and 90.57% that of an elliptical cross-section. The elliptical cross-section shows the optimal bearing capacity. |
| 资助项目 | Natural Science Foundation of China |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001231667200001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41420]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Shili |
| 作者单位 | 1.Qingdao Univ Technol, Sch Civil Engn, 11 Fushun Rd, Qingdao 266033, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Lexin,Qiu, Shili,Cong, Yu,et al. The Fracture Evolution Mechanism of Tunnels with Different Cross-Sections under Biaxial Loading[J]. PROCESSES,2024,12(5):24. |
| APA | Jia, Lexin,Qiu, Shili,Cong, Yu,&Wang, Xiaoshan.(2024).The Fracture Evolution Mechanism of Tunnels with Different Cross-Sections under Biaxial Loading.PROCESSES,12(5),24. |
| MLA | Jia, Lexin,et al."The Fracture Evolution Mechanism of Tunnels with Different Cross-Sections under Biaxial Loading".PROCESSES 12.5(2024):24. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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