Abstract：Due to the complexity of shield tunnel construction，some segments will be damaged during construction and need to be repaired，and the repair quality will directly influence the safety and durability of shield tunnel. The damage characteristics of a shield tunnel were summarized after investigating the segment damage，the mechanical characteristics of repair part while occurring longitudinal deformation was analyzed，and the longitudinal equivalent stiffness model was adopted to analyze the relationship between the stress on the repair part and longitudinal deformation，so that the controlled repair strength was obtained. Furthermore，according to mechanical characteristics of repair part and damage features，laboratory test model was designed to get the reasonable repair material. The research provides guidance for repair of damaged shield tunnel segment.
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2013, Vol. 32 
