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Study on the aseismic reinforcement technology of dynamic portal section under rare earthquake |
CUI Guangyao1，ZHAO Rui-hua1,LIU Weidong1，WANG Mingnian2， LIN Guojin3 |
| 1. College of Architecture and civil Engineering，North China University of Technology，Beijing，100144，China； 2.School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China； 3. Highway Planning, Survey, Design and Research Institute, Sichuan Provincial Communications Department, Chengdu, Sichuan 610041，China |
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Abstract In order to change weaker seismic behavior of tunnel structure of fault rupture zone under large earthquakes，the monolayer reinforcement aseismic technology of second liner collapse control is proposed, cooperate with the traditional double reinforcement aseismatic technology，the aseismic design of tunnel portal section of dynamics is proceeded. According to the regulations of highway and railway tunnel current seismic code, the principles of tunnel portal section second liner collapse control of aseismic reinforcement is established, and finite difference numerical simulation technology is used to study the collapse prevention aseismic reinforcement scope of application, the results show that monolayer reinforcement aseismic technology is used for the tunnel portal shallow buried section, the tunnel portal effect transition section need not take the aseismic fortification measures at 7 degree earthquake intensity; the double-layer reinforcement aseismatic technology is used for the tunnel portal shallow buried section, and take the monolayer reinforcement aseismatic technology on the tunnel portal effect transition section at 8 degree earthquake intensity; the double-layer reinforcement aseismatic technology is used for the tunnel portal shallow buried section and the tunnel portal effect transition section at 9 degree earthquake intensity. These results are significant to the development of dynamic portal section aseismatic technology.
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Received: 07 August 2013
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2014, Vol. 33 
