Influence of various parameters on pile displacement induced by shield driving

The influence on various stiffnesses and peripheries of single piles by adjacent sheild tunnel construction was researched by the numerical analysis on light-railway line 1 of Suzhou.The result shows that all the pile displacements with various pile stiffnesses towards to the tunnel,the lateral displacement receaches the greatest one at the tunnel axis.The pile vertical displacement varies with the stiffness of the pile,the larger value is the stiffness,the smaller values are the largest lateral and vertical displacements of the pile,and the pile top vertical displacement is greater than that of pile end.When pile elastical modulus(EM) is greater than 10 GPa,pile vertical settlement stops decreasing evidently.The larger is the pile section periphery,the larger values are the largest lateral and vertical displacements of pile induced by sheild driving,and the difference of vertical displacements of the pile top and its end decreases gradually.The lateral displacement at the tunnel axis and vertical settlement of the pile foundation by shield driving should be inspected.