【摘要】 在邻近运营地铁车站进行基坑开挖,由于地铁车站的刚度大,车站-土-基坑围护结构相互作用,土层位移表现出与一般基坑不同的特点。采用FLAC2D程序进行数值模拟,分析在车站和基坑间距不同的情况下,基坑周围土层的变形特点、变形规律,并与没有地铁车站时的位移场做比较。结果表明车站附近的土层的水平位移明显减小,基坑离车站越近,其值越小;土层有向上移动趋势,靠近基坑的位移值较大,且基坑离车站越近、基坑开挖深度越大,竖向位移越明显。更多还原

【Abstract】 During the excavation of foundation pit adjacent to subway station,the soil layers displacement takes on different characteristics due to the big stiffness of subway station,and station-soil-structure interaction.In the case of different distance between station and foundation pit,using FLAC2D program to analyze the characteristics and rules of soil layers displacement and the results are compared with that without station.The results show that the horizontal displacements of soil layers are diminished and those of soil layers are raised,and the closer the spacing and the deeper the foundation pit the vertical displacement is more obvious.更多还原