摘要
随着城市建设的发展,周边环境复杂的深基坑工程数量明显增多,基坑的开挖必将改变周围土体应力场,对周边环境产生影响。以杭州一紧邻地铁隧道的砂性土地基深基坑工程为例,运用Plaxis软件对基坑施工过程中围护结构以及临近隧道变形进行模拟,并与现场监测数据进行了对比分析,探讨了基坑外土体位移的衰减规律。结果表明:计算结果与实测结果基本吻合,砂性土地基深基坑开挖会引起围护结构、周边土体以及临近隧道产生向基坑方向的位移,变形规律与开挖工况以及距基坑远近密切相关。本文结果为类似砂性土地基深基坑工程设计及施工提供有益借鉴。
With the rapid development of modern cities, the number of deep excavation sites adjacent to complicated surroundings is increasing significantly. The construction of excavations will change the soil stress around the site and affect the surrounding circumstance. According to the practice of a sandy deep foundation site neighboring the metro tunnel in Hangzhou, the retaining structure of deep foundation and the deformation of tunnel nearby during the construction of excavation are simulated by Plaxis considering the attenuation law of the deformation of the soils around the foundation. By analyzing the measured data, the results show that the calculated results are is basically consistent with the field surveys. Furthermore, the retaining structure, surrounding sandy soils and the adjacent tunnel will shift toward the site during the construction of deep excavation. The deformation rules greatly related with the construction schedule of excavation and the distance of site. This study may provide reference for the design of sandy deep foundation pit engineering.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2014年第S2期311-318,共8页
Chinese Journal of Geotechnical Engineering
基金
杭州市建委资助项目
关键词
基坑开挖
盾构隧道
现场监测
数据分析
foundation excavation
shield tunnel
site monitoring
data analysis
