深基坑开挖对邻近地铁车站影响的三维数值分析

运用MIDAS/GTS软件的施工阶段分析功能,针对深基坑施工对邻近地铁车站的影响进行三维数值分析。结果表明:对于采用排桩+内支撑方式进行支护的邻近地铁车站侧深基坑,加大支护桩桩径,加密桩间距可以有效减小地铁车站水平位移;同时,基坑阳角区域水平位移值随开挖逐渐增大,并呈现中间大两端小的趋势。

3D Numerical Analysis on Effect of Deep Excavation on Adjacent Metro Station

This paper, by using construction analysis function of MIDAS/GTS software, carried out three-dimensional numerical analysis on the effect of deep foundation pit excavation on adjacent metro station. The result shows that, for the deep foundation pit adjacent to metro station, which is protected by pile row and inner support, the horizontal displacement of the station may be reduced by enlarging the pile diameter and decreasing the pile spacing; at the same time, in the range of positive corner, the horizontal displacement increases with the excavation depth gradually, presenting a trend of large in the middle and small at two ends.