某邻近地铁超大软土深基坑支护设计分析  

Design and Analysis of a Super Large Soft Soil Deep Foundation Pit Sustaining Near the Subway

作　　者：杨世华 YANG Shihua(Fujian Provincial Institute of Architectural Design and Research Co.,Ltd.,Fuzhou 350001)

机构地区：[1]福建省建筑设计研究院有限公司,福建福州350001

出　　处：《福建建筑》2020年第10期75-80,共6页Fujian Architecture & Construction

摘　　要：阐述了某邻近地铁超大软土深基坑工程,支护结构的设计选型,并针对该基坑支护方案采取的相应措施,采用了有限元软件Midas GTS NX模拟计算,验证该基坑开挖对邻近地铁的影响度。结果表明,其影响度满足规范要求;随后,对比分析了实测数据,两个数据结果较为接近。基此认为,该基坑工程采用围护桩+一道钢筋混凝土内支撑+坑内被动区土体加固支护形式,既缩短了工期,又对地铁起到了很好的保护作用;采用三维有限元软件分析基坑开挖,对相邻地铁车站和隧道的影响程度,是一种可行的分析手段。Based on an engineering practice of super large soft soil deep foundation pit near a subway,the design and selection of sustaining structure and the corresponding measures for subway protection are described in this paper. And the software of Midas GTS NX based on the finite element method is used to simulate the influence of foundation pit excavation on adjacent subway. The simulated result shows that the impact meets the specification requirements. And it is also compared with the in-site measured data. It is indicated that the simulated result is similar to the measured result. This foundation pit engineering adopts the form of retaining pile,a reinforced concrete inner support and soil reinforcement in the passive soil area. This can shorten the construction time and provide good protecting to the subway. It is a feasible analysis method of using 3D finite element software to simulate the influence of foundation pit excavation on adjacent subway stations and tunnels.

关 键 词：深基坑 邻近地铁 软土 数值分析 

分 类 号：TU47[建筑科学—结构工程]