Abstract
This paper presents the effect of thickness of Buffer layer on the safety of cut-and-cover tunnel under the given magnitude and height of rockfall, and the limit load of the structure. To establish calculating models of rockfall in different conditions, the dybamics of the fall down to the surface of the slope is taken into account and the exterior characteristics of the rockfall is analyzed. We have derived the formula for calculating velocity of rocks before and after collision, calculated the impact load upon the structures below and the limit load, and compared the impact force and limit load to judge the safety of the structure. Finally, the validity of models is approved by the safety evaluation of cut-and-cover tunnel in the mouth of Heshang Mountain in Nandan County.
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Foundation item: Supported by the Science and Technology Item of the West Road Construction of the Ministry of Communication (2003-318-802-01)
Biography: SONG Shuzhi(1983-), male, Ph. D. candidate, research direction: slide destroy regularity, engineering prevention and control.
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Shuzhi, S., Jiming, K., Chenghua, W. et al. Analysis of rockfall and its impact on the cut-and-cover tunnel in dynamics. Wuhan Univ. J. Nat. Sci. 11, 905–909 (2006). https://doi.org/10.1007/BF02830186
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DOI: https://doi.org/10.1007/BF02830186