Abstract:Relying on Haihe Tunnel of Tianjin-Weifang High-speed Double-line Railway tunneling the existing municipal bridge, by studying the influencing rule of the shield construction process on the settlement of ground surface and the deformation of municipal bridge pile, the whole process of shield tunneling is simulated by using the finite element software Midas/GTS NX. The simulation results show that the settlement velocity of the ground surface increases when the high-speed railway tunnel is tunneled near the municipal bridges. The location of the maximum surface settlement is not near the pile foundation of bridge. The pile foundation is prone to inward inclination when the tunneling is through the end of the piles in bad geological conditions. The displacement value of the same row of piles is basically the same. The horizontal displacement of the pile end is greater than the pile top. And the horizontal displacement of the front pile under the same pier abutment is less than that of the rear pile, and the vertical displacement is greater than that of the rear pile.
