Abstract:Currently, the theoretical studies on pile foundation deformation induced by adjacent tunneling are generally based on one parameter Winkler foundation model or two parameters Pasternak foundation model,rare studies have been considering in three parameters Kerr foundation model with greater computational accuracy. Based on Kerr foundation model, the governing equation of horizontal deflection of passive pile is established. Combining with the horizontal additional stress imposed by shield excavation, the analytical expression of the mathematical matrix of tunneling on the adjacent pile foundation is obtained using the difference method, and then the semi-analytical solution of the horizontal displacement of the passive pile is obtained.Through verification of two engineering cases, the Kerr foundation model is more consistent with the measured data than the Winkler and Pasternak foundation model.The results of parameter analysis show that the horizontal displacement increases with the increase of tunnel diameter. With increase of the passive pile diameter,horizontal displacement of the passive pile decreases.Passive pile displacement decreases with the increase of the horizontal distance or vertical distance between the passive pile and tunneling for the tunnel excavation under the pile bottom.