刘智成，杨德春，王世君
(广州地铁设计研究院有限公司，广州510010)

[摘要] 结合宁波轨道交通一号线西门口站软土地铁深基坑工程设计与坑底土层加固计算分析，在地质条件较差，敏感建筑物较近，周边环境对基坑变形要求较高，结合PLAXIS 2D 8.X和FLAC3D3.0有限元软件建立三维有限元模型，分析得出模拟值，作为施工超前预警值，结合基坑施工的监测实践，分析了软土地铁深基坑设计与施工对周边敏感建筑物的沉降影响因素，提出了周边建筑物的安全保护措施。
[关键词] 地铁深基坑；坑底加固；地下连续墙；敏感建筑物；沉降分析；施工监测

Effect and Analysis of sensitive building based on design of deep foundation pit bottom-fastening of soft soils inside construction metro station
Liu zhicheng,  Yang Dechun,  Wang Shijun
(Guangzhou Metro Design&Research Institute Co., Ltd., Guangzhou 510010, China)

Abstract: Based on the effect and analysis of sensitive building on design of deep foundation pit bottom-fastening of soft soils inside Ningbo subway line l Ximenkou metro station, the data processing method was adopt design. Utilizing the deformation of supporting structure which was obtained from the model of finite element simulation of a PLAXIS 2D 8.X and FLAC3D3.0 under complicated geological conditions. As the experimental marriage Partner, and basing on the appropriate level of the factor figure, we select the suitable orthogonal array to carry on the numerical simulation experiment. According to the Range analysis, variance analysis and the analysis of Contribute effect picture, among the greatest factor which influence the displacement of supporting structure. Parameter sensitiveness which was from great to light arranges were summarized and could be reference for design and construction of similar projects.
Keyword: subway deep foundation pit; pit bottom-fastening; underground diaphragm wall; sensitive building; settlement analysis;  construction monitoring