地铁施工方案对邻近桥基的沉降影响优化分析

针对国贸站西北和东北风道施工对近邻桥基沉降影响这一实际工程问题。运用ABAQUS软件，建立了两个风道施工过程中桩-土相互作用模型，在对施工过程进行动态模拟的同时，重点分析了不同施工方案对桥基绝对沉降和差异沉降的影响程度，并提出了优化的施工方案。研究表明，东北风道和西北风道不同的施工路径对桥基的沉降值影响不明显。但对桥基的差异沉降影响较为显著，从而表明，施工方案的优化是非常必要的。对该工程施工过程中为保障近邻桥基的安全提供了依据和指导作用。

Optimal Analysis of Settlement Effect on Adjacent Pile Foundation Induced by Metro Construction Schemes

Combined with the effect on adjacent pile foundation by northwest and northeast wind tunnel construction of Guomao station of Beijing metro line 10,by means of ABAQUS software,a FE model of pile-soil interaction used to simulate construction is built,the construction process and its effect on the adjacent pile foundation of Guomao bridge are simulated and the absolute settlement of single pile foundation as well as relative settlement between pile foundations are studied and the optimized construction schemes are put forward.It was proved that the absolute settlement of pile foundation isn't sensitive to different construction paths,and,in contrast,the influence on relative settlement between pile foundations is quite obvious.Therefore,it is necessary that different engineering schemes are optimized before construction,the basis and guidance are provided for current Guomao station and similar engineering construction.