It is difficult to simulate the whole process of shield tunneling and divide the overlapped shield tunnel. Combined with overlapped tunnel in Shenzhen Metro Hongling Zhonglu-Laojie-Shaibu interval to establish a more comprehensively 3D numerical simulation method

reflecting the characteristic of the whole tunneling process and divide shield tunnel from its horizontal direction on the basis of the index of Mohr-coulomb

longitudinal partition according to displacement rate of change. The results show that: the horizontal adjacent partition is : no-effect area when F≤F?

weak-effect area when F?＜F＜0

intensive-effect area when F≥0; longitudinal partition is：Less than 0.3 mm/d for the non-effect zone，0.3-1.5 mm/d for the low impact zone

greater than 1.5 mm/d for the high-impact zone. The results applied to the Shenzhen Metro Hongling Zhonglu-Laojie-Shaibu intervals overlap tunnel

and achieved good results

and provide theoretical supports for the numerical simulation of the whole tunneling process and the design and construction of shield overlapped tunnel

and it also provides a reference for similar projects.