软土地铁深基坑底加固设计对附近敏感建筑物沉降影响分析  

Influence of Bottom Strengthening of a Deep Foundation Pit of Subway in Soft Ground on the Settlements of Nearby Sensitive Buildings

作　　者：刘智成[1] 杨德春[1] 王世君[1] 

机构地区：[1]广州地铁设计研究院有限公司,广州510010

出　　处：《现代隧道技术》2010年第3期39-45,共7页Modern Tunnelling Technology

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,文章运用PLAXIS和FLAC3D建立二维及三维有限元模型进行了基坑开挖地表沉降分析。依据计算模拟结果和以往的监测经验,提出了坑底加固的有效措施和基坑施工的沉降预警值。其研究成果可供其它复杂地质条件下对变形要求较高的基坑加固设计中参考。Based on the design of the deep foundation pit in soft ground for Ximenkou station of Ningbo Rail Transit Line 1,this article analyzed the ground surface settlements during the construction by two and threedimensional numerical simulation with softwares PLAXIS and FLAC3D.According to the numerical results and experience of monitoring,authors put forward the effective method for strengthening the pit bottom and the alarm values of settlements for the excavation.It could be helpful for the reinforcement design with high requirements for critical soil conditions.

关 键 词：地铁深基坑 坑底加固 沉降分析 施工监测 

分 类 号：U457.3[建筑科学—桥梁与隧道工程]