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《Chinese Journal of Underground Space and Engineering》 2009-02
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Optimum Analysis of Large-Section Tunnel's Bolts Location by FLAC

ZHENG Jun-jie1,LIU Xiu-min1,OUYANG Yuan-ping2,ZHANG Rong-jun1(1.Institute of Geotechnical and Underground Engineering,Huazhong University of Science and Technology,Wuhan 430074;2.Changjiang Institute of Survey,Planning,Design and Research,Changjiang Water Resources Commission,Wuhan 430010)  
Numerical simulation is a very effective analyzing method in underground engineering.For large-section highway tunnel,numerical simulation can be used to analyze the support system of the tunnel to achieve optimum design.The finite difference software(FLAC) has been employed in this paper to estimate the influences of various bolts layout on the distribution of stress of surrounding rock,stress of bolts and stability of surrounding rock.These analyses are based on the assumption that the surrounding rock and the excavation method are the same.Consequently,the optimum bolts layout scheme of large-section tunnel in weak rock can be obtained at certain class of surrounding rock from the foregoing calculation results.It can provide reference for the optimization of design parameters of bolts in large section tunnels and underground structures,and also for the amendment of technical specifications for design and construction of tunnel.
【Fund】: 新世纪优秀人才支持计划资助项目(NCET-06-649)
【CateGory Index】: U455.7
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