Physical Model Study on Brittle Failure of Pressurized Deep Tunnel with Support System
文献类型：期刊论文
| 作者 | Zhu, Guo-Qiang1,3; Li, Shaojun1; Li, Changdong3; Liu, Gen3; Zhou, Yang-Yi2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2023-09-12 |
| 页码 | 21 |
| 关键词 | Analog material Brittle failure Bearing capacity Physical model test Pressurized deep tunnel |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-023-03541-7 |
| 英文摘要 | Severe instability disasters of hard rock often occur in pressurized deep tunnels with support systems. To investigate the deformation characteristics, brittle fracture process, failure mechanism, and collaborative effect of the rock and support system in a pressurized deep tunnel, physical model tests were designed and performed. An analog material preparation method is proposed for simulating the brittle failure of deep tunnels. The test results indicated that the brittleness and the strength of the developed analog material were significantly increased compared to those of previously reported analog materials, and its characteristics were similar to those of deep hard rock. The physical model tests realistically simulated the instantaneous process of brittle fracture of a pressurized deep tunnel, and the mechanical response laws of deformation, digital images, and acoustic emissions were captured. The strains of the surrounding rock, the lining, and the bolt were the largest in the shallow part of the sidewall and gradually decreased away from the tunnel. The brittle cracking paths of the shallow rock were along the direction of the internal pressure, whereas that of the interior rock mass were along the direction of the maximum principal stress. The brittle failure of a pressurized deep tunnel is caused by the incompatible tensile strain of the surrounding rock under the control of the anisotropic stress field. The bearing capacities of the surrounding rock, the lining, and the bolt decreased successively. Cyclic loading and unloading of internal pressure can reduce the bearing capacities of deep tunnels, whereas a constant internal pressure has a supporting effect. The brittleness and strength of the developed analogue material were significantly increased compared with those of previously reported analogue materials, and its characteristics weresimilar to those of deep hard rock.The processes of brittle fracture of a pressurized deep tunnel with support system were realistically simulated via physical model tests.The deformation characteristics, fracture mechanism, bearing ratio, and collaborative effect of the surrounding rock and support system in a pressurized deep tunnel were analyzed. |
| 资助项目 | National Natural Science Foundation of China[42090054] ; National Natural Science Foundation of China[U176520026] ; National Natural Science Foundation of China[42307241] ; National Natural Science Foundation of China[52079027] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME021011] ; China Postdoctoral Science Foundation[2021M703003] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001064526600002 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39487]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Shaojun |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 3.China Univ Geosci, Badong Natl Observat & Res Stn Geohazards, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Guo-Qiang,Li, Shaojun,Li, Changdong,et al. Physical Model Study on Brittle Failure of Pressurized Deep Tunnel with Support System[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023:21. |
| APA | Zhu, Guo-Qiang,Li, Shaojun,Li, Changdong,Liu, Gen,&Zhou, Yang-Yi.(2023).Physical Model Study on Brittle Failure of Pressurized Deep Tunnel with Support System.ROCK MECHANICS AND ROCK ENGINEERING,21. |
| MLA | Zhu, Guo-Qiang,et al."Physical Model Study on Brittle Failure of Pressurized Deep Tunnel with Support System".ROCK MECHANICS AND ROCK ENGINEERING (2023):21. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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