根据实际工程,运用FLAC-3D软件建立了深基坑工程的数值分析模型,就基坑坑底加固措施对基坑本身及其周边环境的影响进行了分析.建议坑底加固区的合理宽度为1倍基坑开挖深度左右,从而在较大程度上控制基坑坑壁的位移.%In order to ensure the stability of deep excavation pit and the embankment near national railways, this paper has established a numerical analysis model for deep foundation engineering by FLAC - 3D software, carried out a series of comparison and analysis on the impact of pit bottom reinforcement measures on pit itself and the environment based on the actual engineering, puts forward a reasonable bottom reinforced area which is 1 time the width of the excavating depth, to control more effectively the excavation pit displacement. This method will have a certain practical significance for deep foundation pit design and distortion control in soft soil area.
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