Experimental Study on Failure Mode of Tunnel Model Containing Cavity in Different Locations

doi:10.12068/j.issn.1005-3026.2020.06.018

Abstract

Abstract: Cavity is an important factor affecting the stability of the tunnel. A cavity was set at the shoulder， the side wall， the arch and the floor of each tunnel model to study the failure modes and failure sequences of the tunnel. The results showed that when the cavity is near the shoulder of the tunnel， failure occurs at the boundary of the cavity and the floor， accompanied by compressive failure at the arch foot. When the cavity is near the side wall， the side wall is buckled and the crown is cracked. For model with a cavity near the arch foot， the lining near the cavity and the crown are cracked as a consequence. For model with a cavity at the bottom of the floor， failure occurs at the floor， the shoulder and the crown. These results can give some references for the construction and maintenance of tunnel.

Key words: cavity, tunnel, lining, stability analysis

CLC Number:

TU990.3

WANG Shu-hong， WANG Peng-yu， LIU Yu， ZHU Bao-qiang. Experimental Study on Failure Mode of Tunnel Model Containing Cavity in Different Locations[J]. Journal of Northeastern University Natural Science, 2020, 41(6): 863-869.

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