某斜坡式海堤工程对临近桥梁桩基位移的影响

摘要

A slope seawall project is near a bridge,and may have a negative impact on the bridge.We analyze two typical sections of excavation and cement mixing pile by a three-dimensional finite element model established by Plaxis 3D, and obtain the maximum displacement results of bridge pile foundation.The results show that the horizontal displacement of the bridge pile is much larger than the vertical displacement.The horizontal displacement of the cement pile is smaller than that of the cement mixing pile.The displacements of two typical sections are both less than 5 mm requirements.%某斜坡式海堤工程临近桥梁,可能对桥梁产生不利影响.采用Plaxis 3D软件建立三维有限元模型,分析开挖换填和水泥搅拌桩两种典型断面,得出桥梁桩基的最大位移.结果表明,该海堤工程对桥梁桩基的水平位移影响较大,对竖向位移影响很小;水泥搅拌桩断面相比开挖换填断面,桩基水平位移更小;两个典型断面均能满足桥梁桩基位移小于5 mm的要求.