河道开挖对邻近桥墩桩基影响的数值分析  

Numerical analysis of influence of river excavation on adjacent pile foundation

作　　者：邱超 王平安[1] 刘建元 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《山西建筑》2017年第32期167-168,共2页Shanxi Architecture

摘　　要：结合河道开挖工程实例,通过三维有限元分析,研究了河道开挖对邻桥墩桩基的影响。对桩基变形作了初步预估,发现同等条件下开挖深度越大,扰动变形越明显,靠近河道位置最近的1号桩身的变形最大,位于12.72 m埋深处的最大水平变形约-0.98 mm,桩端水平位移约-0.19 mm,桩顶水平位移约-0.92 mm;同时给出了合理的桥墩监测变形控制值,为以后的实际工程提供借鉴。Combined with the example of river excavation,the influence of excavation on the pile foundation is studied by three-dimensional finite element analysis. The deformation of pile foundation is preliminarily estimated. It is found that the excavation depth is bigger and the disturbance deformation is more obvious under the same condition. The maximum deformation of the 1# pile near the river location is about -0. 98 mm at the depth of 12. 72 m,the horizontal displacement of the pile is about-0. 19 mm,and the horizontal displacement of the pile is about -0. 92 mm.Moreover,the reasonable monitoring value of pier is given,which maybe provide some reference for future practical projects.

关 键 词：河道开挖 桩基础 数值分析 变形 

分 类 号：U445.551[建筑科学—桥梁与隧道工程]