Safety Assessment and Optimization of High-Voltage Transmission Towers Affected by Blasting Vibration of Adjacent Outlet Tunnel Based on Infinite Element Boundary

ZHAO Yong; DOU Hongqiang; WANG Peng; SUN Yongxin

doi:10.13204/j.gyjzG21042308

Volume 53 Issue 4

Apr. 2023

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ZHAO Yong, DOU Hongqiang, WANG Peng, SUN Yongxin. Safety Assessment and Optimization of High-Voltage Transmission Towers Affected by Blasting Vibration of Adjacent Outlet Tunnel Based on Infinite Element Boundary[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 22-28. doi: 10.13204/j.gyjzG21042308

Citation:

ZHAO Yong, DOU Hongqiang, WANG Peng, SUN Yongxin. Safety Assessment and Optimization of High-Voltage Transmission Towers Affected by Blasting Vibration of Adjacent Outlet Tunnel Based on Infinite Element Boundary[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 22-28. doi: 10.13204/j.gyjzG21042308

Citation:

ZHAO Yong, DOU Hongqiang, WANG Peng, SUN Yongxin. Safety Assessment and Optimization of High-Voltage Transmission Towers Affected by Blasting Vibration of Adjacent Outlet Tunnel Based on Infinite Element Boundary[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 22-28. doi: 10.13204/j.gyjzG21042308

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Safety Assessment and Optimization of High-Voltage Transmission Towers Affected by Blasting Vibration of Adjacent Outlet Tunnel Based on Infinite Element Boundary

doi: 10.13204/j.gyjzG21042308

1. State Grid Shandong Electric Power Company, Jinan 250001, China;
2. Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China;
3. Economic and Technology Research Institute, State Grid Shandong Electric Power Company, Jinan 250000, China

Received Date: 2021-04-23
Available Online: 2023-07-01

Abstract

Abstract

An outlet tunnel adjacent to multiple high-voltage towers will be constructed by borehole-blasting method. Based on this project a dynamic numerical calculation model with infinite element boundary under blasting dynamic load was established. The characteristics of the dynamic response for high-voltage transmission towers were studied, and the attenuation law of the surrounding rock vibration velocity was also discussed. Then the proposed construction schemes were evaluated and optimized in accordance with the corresponding specifications. The research results showed that the infinite element boundary could better reflect the actual situation of the blasting energy propagating to the semi-infinite medium and avoid oscillations in the computing domain. Under the action of the blasting load, the resultant vibration velocity of the surrounding rock decreased with the increase of the distance from the blasting center. Based on the corresponding specifications, a 2.0 cm/s peak vibration velocity was selected as the safety criterion, and the critical safety distances of the three proposed blasting construction schemes were determined. Furthermore, in consideration of the surrounding rock engineering characteristics of the outlet tunnel and the relative position of the high-voltage tower, the respective working area for the three blasting construction schemes was clarified and optimized.
- high-voltage tower,
- blasting vibration,
- infinite element,
- safety assessment,
- optimization design

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References(15)

References

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