A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion
In this paper, a practical project of subway tunnel lining demolition via blasting for the construction of a subway station under the action of the blasting load and the weight of collapsed rock mass was proposed. The tunnel overbreak and underbreak quality, the failure mechanism of the tunnel linin...
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MDPI AG
2022-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/19/9564 |
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| author | Jie Zhou Pengyu Shu Bin Zhang Baowang Deng Yi Wu |
| author_facet | Jie Zhou Pengyu Shu Bin Zhang Baowang Deng Yi Wu |
| author_sort | Jie Zhou |
| collection | DOAJ |
| description | In this paper, a practical project of subway tunnel lining demolition via blasting for the construction of a subway station under the action of the blasting load and the weight of collapsed rock mass was proposed. The tunnel overbreak and underbreak quality, the failure mechanism of the tunnel lining structure, the particle peak velocity (PPV), and the stress evolution law of the surrounding rock caused by tunnel blasting were researched using LS-DYNA. Firstly, the results show that the blasting parameters presented in this paper can maintain the cross-section of a smooth outline of tunnel excavation and the overbreak or underbreak quality in control. Secondly, the tensile stress in the existing tunnel lining caused by blasting exceeded the concrete tensile strength, and the radius of the burst fracture was 0.86 m, which is greater than the thickness of the tunnel lining (0.7 m). Thirdly, the blasting stress in the surrounding rock peaked within 0.1 × 10<sup>−3</sup> s after the blasting, and failure of the surrounding rock occurred. Moreover, the relationship between the PPV and the distance from the blasting center shows that the blasting parameters used in this paper can effectively control the PPV. Therefore, this study reveals that the expansion of existing tunnels into subway stations using this method can improve the efficiency of construction. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:05:47Z |
| publishDate | 2022-09-01 |
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| spelling | doaj.art-9bbf60e14e5045d7a9fc2578ed9185762023-11-23T19:41:44ZengMDPI AGApplied Sciences2076-34172022-09-011219956410.3390/app12199564A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel ExpansionJie Zhou0Pengyu Shu1Bin Zhang2Baowang Deng3Yi Wu4State Key Laboratory of Mountainous Bridge and Tunnel Engineering, Chongqing 400074, ChinaChina Construction Bridge Co., Ltd., Chongqing 402218, ChinaState Key Laboratory of Mountainous Bridge and Tunnel Engineering, Chongqing 400074, ChinaChina Construction Bridge Co., Ltd., Chongqing 402218, ChinaSchool of Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, ChinaIn this paper, a practical project of subway tunnel lining demolition via blasting for the construction of a subway station under the action of the blasting load and the weight of collapsed rock mass was proposed. The tunnel overbreak and underbreak quality, the failure mechanism of the tunnel lining structure, the particle peak velocity (PPV), and the stress evolution law of the surrounding rock caused by tunnel blasting were researched using LS-DYNA. Firstly, the results show that the blasting parameters presented in this paper can maintain the cross-section of a smooth outline of tunnel excavation and the overbreak or underbreak quality in control. Secondly, the tensile stress in the existing tunnel lining caused by blasting exceeded the concrete tensile strength, and the radius of the burst fracture was 0.86 m, which is greater than the thickness of the tunnel lining (0.7 m). Thirdly, the blasting stress in the surrounding rock peaked within 0.1 × 10<sup>−3</sup> s after the blasting, and failure of the surrounding rock occurred. Moreover, the relationship between the PPV and the distance from the blasting center shows that the blasting parameters used in this paper can effectively control the PPV. Therefore, this study reveals that the expansion of existing tunnels into subway stations using this method can improve the efficiency of construction.https://www.mdpi.com/2076-3417/12/19/9564subway tunnelexpansion excavationtunnel lining demolitionblasting loadfailure mechanismparticle peak velocity (PPV) |
| spellingShingle | Jie Zhou Pengyu Shu Bin Zhang Baowang Deng Yi Wu A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion Applied Sciences subway tunnel expansion excavation tunnel lining demolition blasting load failure mechanism particle peak velocity (PPV) |
| title | A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion |
| title_full | A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion |
| title_fullStr | A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion |
| title_full_unstemmed | A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion |
| title_short | A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion |
| title_sort | finite element analysis of tunnel lining demolition by blasting for subway tunnel expansion |
| topic | subway tunnel expansion excavation tunnel lining demolition blasting load failure mechanism particle peak velocity (PPV) |
| url | https://www.mdpi.com/2076-3417/12/19/9564 |
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