Study on Influence Law of Shield Tunneling Under Existing Bridge Pier and Abutment Pile Foundation
In order to explore the influence law of shield construction on the pier and abutment pile foundation of the existing bridge,based on a subway project in Qingdao,numerical simulation analy-sis was carried out to study the influence of shield construction on the settlement and horizontal de-formation of the existing adjacent viaduct,the deformation of railway track surface and the surface settlement.The numerical results show that the displacement caused by shield passing through the existing bridge structure is mainly settlement,and the horizontal displacement is small,which has no obvious safety impact on the bridge structure.Shield tunneling has an impact on both longitudinal and lateral surface subsidence,especially on lateral surface subsidence,but it will not have a significant impact on ground subsidence.Compared with the horizontal irregularity caused by rail,the height ir-regularity caused by shield tunneling has a greater impact and a farther range,but they are all within the control range and will not pose a threat to the safety of train operation.
万方数据
维普
