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Safety assessment for buried drainage box culvert under influence of underground connected aisle blasting: A case study |
Wenchang SUN1, Nan JIANG1(), Chuanbo ZHOU1, Jinshan SUN2, Tingyao WU1 |
1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China 2. Hubei (Wuhan) Institute of Explosion and Blasting Technology, Jianghan University, Wuhan 430056, China |
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Abstract Blasting engineering in complex urban environments is considered to influence the safety and stability of the overlying drainage box culvert structure owing to vibration. Therefore, field blasting and vibration tests were performed on the blasting engineering of the Wuhan Metro Line 8 connected aisle, and the LS-DYNA software was used to analyze the dynamic response characteristics of an underground drainage box culvert during the blasting test. The vibration response evolution law of the buried drainage box culvert under blasting vibration was investigated, and a safe surface control standard for the blast vibration of a drainage box culvert is proposed. The results reveal that the maximum tensile stress of the box culvert structure was 0.33 MPa. The peak particle velocity (PPV) and peak tensile stress (PTS) of the drainage box culvert decreased as the water level in the box culvert increased. Based on the relationship between the tensile stress of the box culvert, PPV of the box culvert, and PPV of the surface, it is proposed that the surface control velocity of the buried drainage box culvert is 1.36 cm/s.
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Keywords
drainage box culvert
underpass blasting
dynamic response
numerical simulation
safety assessment
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Corresponding Author(s):
Nan JIANG
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Just Accepted Date: 25 November 2022
Online First Date: 16 January 2023
Issue Date: 03 April 2023
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