Abstract—The surrounding rock resistance is one of the principal loads of structural design for tunnel. The determination of the distribution of resisting force will influence the calculation results of the structure, and the determination of the range of resisting force in tunnel will also influence internal force calculation and structure design. Accordingly, based on elastic-plastic theory, the range of resisting force of surrounding rock of all levels in tunnel were studied by the uncertainty analysis method. The results indicate that the range of resisting force of surrounding rock diminishes gradually with downgrading of surrounding rock. When the grade of surrounding rock reaches V and VI, the resisting force will not in existence in tunnel. Under such circumstance, the resisting force of surrounding rock will be not be considered in the internal force calculation and structure design. This conclusion will provide reference for underground engineering design and construction.

Index Terms—Surrounding rock, Resisting force, Interval analysis, Tunnel

Cite: Huang Mingkui and Quan Jian, "Study on Distribution Range of Surrounding Rock Resistance in Tunnel," International Journal of Structural and Civil Engineering Research, Vol. 4, No. 1, pp.81-87, February 2015.