Abstract: Based on construction condition of Dapu road tunnel acrossing river in Shanghai,plate elements used to imitate tunnel lining, lane plate and vertical brace, as well as soil springs to imitate interaction between soil and tunnel,are put forword. According to the model founded, the corresponding calculation parameters are determined. Compared the model computed results with the in-site test results, the reasonable dependability of mechanic model and calculation parameters, and the correctness of calculation method are demonstrated, which provides reference for mechanical analysis of tunnel and underground structure that are constructed by shield-driven or mine method.