Study on the Blasting Vibration Characteristics of Shallow Tunnel under Unsymmetrical Pressure

Abstract:

Based on Huolangyu tunnel of Mixing road, this paper researches the monitoring of ground surface vibration and the technology of controlled blasting. Monitoring and analysis results show: The ground surface vibration decline from constructed position to un-constructed position along tunnel excavation direction. The maximum ground surface vibration locates at the shallow position along tunnel cross section. The surface vibration velocity main vibration frequency has more than one advantage frequency, main vibration frequency concentration distribution in 20～40Hz low frequency band. Tunnel driving, the emphasis of the blasting vibration should focus on control of tunnel excavation area has the upper, lining structure and shallow buried in the influence of the surrounding rock; Tunnel through the surface buildings, cannot ignore already forming of blasting seismic effects of tunnel amplification and resonance effect.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 1405-1408
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.1405
• Online since: October 2012
• Authors: Wen Xue Gao, Xi Meng Sun, Bing Hui Hou, Ning Ning Chen
• Keywords: Driving Blasting, Shallow Tunnel under Unsymmetrical Pressure, Spectrum Analysis, Vibration Monitoring

References

[1] Liping Li, Shucai Li. Geotechnical Engineering, Vol. 29(2008), p.2292(In Chinese).

[2] Jichun Zhang, Xiaojun Cao. Journal of Rock Mechanics and Engineering, Vol. 24(2005), p.4158(In Chinese).

[3] Ximeng Sun, Wenxue Gao. Construction Technology, Vol. 40(2011), p.51(In Chinese).

[4] Qing Chen, Hongtu Wang. Geotechnical Engineering, 2005, Vol. 6(2005), p.964(In Chinese).

[5] Xin Wang, Zengrong Liu. Journal of Geotechnical Engineering, Vol. 33(2011), p.762(In Chinese).