Dynamic influence of single pile internal force induced by adjacent shield driving

In order to research the influence on single pile internal force induced by adjacent shield driving,the numerical analysis was used to study the pile internal force by adjacent tunnel sheild costruction in Yusan Park and Suzhou Entertainment Resort on light-railway Line 1 of Suzhou.It showed that in the shield driving processes,the adjacent pile axis force was the characteristicly little at the pile top and end,and large at the tunnel axis zone.The adjacent pile axis force and the moment become larger and larger with shield approaching to adjacent pile,and maximal negative moment was greater than maximal positive moment;the longer the pile was,the greater the pile axis force was.The greatest moment of various lengthes adjacent piles was at the tunnel axis zone.When sheild crosses just right under the pile,the axis force was greater at pile top and end and little at the middle,the maximal moment is at the middle of the pile.When sheild cutting face arrived at the right above pile,the pile is pulled to be longer,the axis force of pile shaft section changed from compresive to tensile,and the maximal moment is at the middle of the pile with pile length elongated.