地铁盾构下穿高架对桥桩影响的数值分析

Numerical analysis of the effect to pile with shield tunnel crossing the viaduct

基于合肥地铁盾构隧道穿越高架桥工程,用有限元软件MIDAS GTS/NX对开挖过程进行仿真模拟,分析了开挖过程对高架桩基的影响。结果表明:高架桥桩的位移总体上表现为距盾构区相同距离下的桥桩的位移值基本相同;距盾构区不同距离下的桥桩的位移变化表现形式基本相似,盾构隧道对高架桥的影响在安全限度范围内。

Based on the project of Hefei metro shield tunnel crossing the viaduct, the excavation process is simulated with the finite element software MIDAS GTS, and the effects of excavation process on elevated pile foundation are analyzed. The overall displacement of Viaduct Pile shows that the displacement under the same distance from the shield area of piles is basically the same; the displacement form from the shield area under different distances is basically the similar, and the influence of shield tunnel on the pile foundation is within the limit of safety.