Failure mechanism of tunnel portal during strong earthquakes - Details

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EI Scopus

Abstract：

Tunnel　portal　section　is　one　of　the　most　easily　damaged　parts　in　mountain　tunnel　during　strong　earthquake.　Tunnel　opening　is　the　only　part　exposed　outside　the　surrounding　rock.　Failures　of　this　part　may　block　roads,　which　greatly　influences　the　transportation　of　the　local　area.　Examples　are　studied　in　this　paper　focus　on　failures　on　tunnel　portals.　Damage　types　are　categorized.　According　to　these　damage　types,　influencing　factors　and　mechanism　of　these　damages　are　analyzed　including　thickness　of　cover　layers,　interfaces　and　discontinuities,　construction　methods.　Suggestions　of　seismic　resistance　and　reduction　methods　are　proposed　regarding　these　influencing　factors.

Keyword：

Earthquakes Earthquake engineering Failure (mechanical) Engineering geology Safety engineering

Author Community：

[ 1 ] [Zhao, X.]Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, 100124, Beijing, China
[ 2 ] [Zhao, X.]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Dongsan Rd. 1, Chenghua District, Chengdu City, China
[ 3 ] [Li, T.B.]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Dongsan Rd. 1, Chenghua District, Chengdu City, China
[ 4 ] [Tao, L.J.]Institute for Geotechnical Engineering and Underground Construction, Beijing University of Technology, 100124, Beijing, China
[ 5 ] [Hou, S.]Institute for Geotechnical Engineering and Underground Construction, Beijing University of Technology, 100124, Beijing, China
[ 6 ] [Li, L.Y.]Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, 100124, Beijing, China
[ 7 ] [Qiu, W.G.]Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China