ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2016, Vol. 36 ›› Issue (4): 465-473.DOI: 10.3973/j.issn.1672-741X.2016.04.015
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ZHANG Longsheng, WENG Xianjie
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Abstract:
Great difficulties will occur at tunnel breakthrough when collapse happens. In order to guarantee the construction safety of tunnel breakthrough and to avoid secondary collapse, the key points and difficulties of breakthrough construction of Fengling Tunnel on NanchangNingdu Highway in Jiangxi are analyzed; the systematic processing technologies, including comprehensive geophysical prospecting, piperoof grouting support of collapse section, decision of rational tunnel breakthrough crosssection, piperoof grouting support of breakthrough section and shortdistance excavation and strengthened support of tunnel, are proposed; the stress and displacement of surrounding rocks and primary support during construction are numerically simulated by means of 3D numerical simulation method. The monitoring results show that the technologies used are safe and feasible.
Key words: Fengling Tunnel, collapse, tunnel breakthrough, systematic processing technology, numerical simulation, monitoring
CLC Number:
U 456.3+3
ZHANG Longsheng, WENG Xianjie. Study of Construction Technologies and Numerical Simulation ofFengling Tunnel Breakthrough under Impact of Collapse[J]. Tunnel Construction, 2016, 36(4): 465-473.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.1672-741X.2016.04.015
http://www.suidaojs.com/EN/Y2016/V36/I4/465
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