Abstract：The mechanical behaviour of the complicated construction of cross connection of shield tunnel and connecting aisle by freezing method in Nanjing metro No.1 line is studied by using three-dimensional finite element numerical simulation method. The research demonstrates the occurrence of the two serious disadvantageous distributions of internal forces with eccentric compression in the major part section and the whole tension in upper and lower sections of removal connection segment in the shield tunnel intersection due to connect aisle construction. Compared with the case without connecting aisle，the longitudinal internal forces in the shield tunnel intersection are obviously increased in amplitude. In particular，the maximum longitudinal bending moment is increased by 9 times. On the basis of analysis above，this paper puts emphasis on the importance of the longitudinal design of segment in tunnel intersection in order to guarantee the safety of segment lining during construction by freezing method.
