ISSN 2096-4498

   CN 44-1745/U

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Tunnel Construction >

2020 , Vol. 40 >Issue 6: 821 - 826

DOI: https://doi.org/10.3973/j.issn.2096-4498.2020.06.006

Noise Propagation Characteristics of Tunnel Construction by Drilling and Blasting Method

  • ZHANG Zhenhua ,
  • BAI Yonghou ,
  • GUO Chun ,
  • CHENG Jianghao
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  • (1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. CCCC SHEC Fourth Highway Engineering Co., Ltd., Luoyang 471013, Henan, China)

Online published: 2020-06-29

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Abstract

The tunnels constructed by drilling and blasting method are always located in a semienclosed environment and characterized by concentrated distribution of highpower and highnoise machinery, which makes it more serious than ground construction in terms of noise problem. In particular, the sound pressure level of the drilling embrasure process is the highest. As a result, the type and magnitude of noise that workers are exposed to and the law of noise propagation in the tunnel are studied based on the Guigala Tunnel Project of Laze Expressway. According to the comparison result between field measurement and numerical simulation by Comsol Multiphysics software, it is found that the highfrequency noise in the tunneling face generally reaches 105 dB(A) and above, and the working face drill embrasure noise still reaches 90 dB (A) after spreading to the secondary lining and inverted arch area, which would do harm to the worker′s health at secondary lining and invert area. Influenced by the structures and boundary conditions, the attenuation rate in the axial direction is not uneven. Due to the sound focusing effect of the arch section, the sound energy in the same section shows that the local sound pressure level of 3~4 m above the center line of the bottom slab is higher than that around the arch.

Key words： highway tunnel; drilling and blasting method; noise propagation characteristics; numerical simulation

Cite this article

ZHANG Zhenhua , BAI Yonghou , GUO Chun , CHENG Jianghao .

Noise Propagation Characteristics of Tunnel Construction by Drilling and Blasting Method

[J]. Tunnel Construction, 2020 , 40(6) : 821 -826 . DOI: 10.3973/j.issn.2096-4498.2020.06.006

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