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Citation |
J. Highway Transp. Res. Dev. (English ed.) 2019; 13(4): 64-71. |
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Copyright |
(Copyright © 2019, Research Institute of Highway, Ministry of Transport in association with the American Society of Civil Engineers) |
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DOI |
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PMID |
unavailable |
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Abstract |
The primary lining structure plays a key role in blasting tunnel construction, and its intensity change and dynamic response directly affect the security of tunnel structures. To investigate the dynamic response of the primary lining structure under blasting loads, a field test combined with numerical simulation was conducted on the new passenger line railway that traverses from Beijing to the Shenyang TJ-1 (Liaoning) Sanlengshan tunnel. The peak particle vibration velocity data were recorded by conducting eight monitoring tests at three measuring points by using TC-4850. The Sadaovsk formula for the propagation law of peak particle vibration velocity was fitted by using the least squares method. The numerical simulation software LS-DYNA was used to obtain the material and equation parameters, and the reliability of the numerical model was verified by using the propagation law of peak particle vibration velocity to determine the variations in the stress and displacements in key locations (i.e., skew, haunch, spandrel, and vault) while considering the strength of the primary lining. |