Safety Analysis of Lining Structure Influenced by Blasting of Tunnel with Extralarge Section and Small Space
| Autor: | Weiping Xu, Haisu Wang, Yiqin Hong, Xuwei Zhao, Li Tang, Keguo Sun |
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| Rok vydání: | 2020 |
| Předmět: |
Article Subject
Explosive material business.industry Physics QC1-999 Mechanical Engineering 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Structural engineering Geotechnical Engineering and Engineering Geology Condensed Matter Physics Space (mathematics) Sensitivity (explosives) 0201 civil engineering Dynamic simulation Mechanics of Materials Section (archaeology) Blasting vibration business Geology 021101 geological & geomatics engineering Civil and Structural Engineering Rock blasting |
| Zdroj: | Shock and Vibration, Vol 2020 (2020) |
| ISSN: | 1875-9203 1070-9622 |
| DOI: | 10.1155/2020/8852702 |
| Popis: | In order to ensure the safety of the Daling tunnel with extralarge section and small space, the three-dimensional model of blasting dynamic simulation had been established and verified. Then, the model was used to analyze the influence of the surrounding rock characteristics and blasting design parameters on the blasting vibration of the first hole, and the analysis of the sensitivity of each factor was carried out. The results showed that blasting of the second hole had a serious impact on the safety of the first hole lining structure. Based on the safety threshold and analysis of sensitivity, the explosive velocity, charge density, and digging length were selected as the key parameters affecting the safety of the tunnel structure. Meanwhile, the corresponding engineering measure was taken based on the results of sensitivity and the actual situation on site, and, after that, the maximum PPV of the right wall of the first hole had been reduced to 9.3 cm/s, which effectively guaranteed the safe construction of the tunnel. |
| Databáze: | OpenAIRE |
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