Influence of shield construction on adjacent high-speed railway bridge piles in silty soil layer

Aiming at the construction problem of high-speed railway bridge in the subway shield tunnel,the high-speed railway bridge of Zhengzhou West District subway tunnel was used as the engineering background,and the displacement of the surrounding soil layer and pier was measured in the field.The ABAQUS numerical simulation software was used to simulate the process of crossing the shield.The dynamic simulation of the construction process was carried out to study the effects of soil grouting reinforcement measures on soil displacement and displacement and internal forces of bridge piles.The results showed that the shield side-crossing high-speed railway pile would cause the maximum horizontal displacement,bending moment and side friction resistance of the pile at the buried depth of the shield tunnel.After the grouting and strengthening of the traversing area,the traversing could be greatly reduced.The maximum settlement of the bridge pier was reduced by 72.6%,and the maximum horizontal displacement,bending moment a