摘要
以上海地区某地下变电站深基坑工程为背景,根据工程实测数据分析基坑开挖对支护结构变形的影响规律。结果表明:基坑开挖过程中,连续墙的位移呈抛物线形,且位移值随着开挖深度增加而增加,但最大水平位移的位置始终保持在开挖面附近;基坑支护结构的变形受到明显的坑角效应影响。采用有限元软件Plaxis分别对该工程顺作法和逆作法施工过程进行数值模拟,通过分析比较得出不同施工方案对基坑变形的影响规律。将数值模拟结果与实测数据对比,分析逆作法施工方案的可行性与优势。
Based on the engineering data of an underground substation in Shanghai, the influence of ex- cavation on the deformation of supporting structure was analyzed according to the measured data. The re- suits show that the displacement of the continuous wall is parabolic during the excavation of the foundation pit, and the displacement value increased with the increase of excavation depth; however, the maximum horizontal displacement position remained near the excavation surface. The deformation of foundation pit structure was affected obviously by the corner effect. The finite element software Plaxis was used to simu- late the construction process of the project, and the influence of different construction schemes on the de- formation of the foundation pit was analyzed and compared. By validating the numerical simulation results with the measured data, the feasibility and advantages of the reverse construction method were demonstra- ted.
出处
《水资源与水工程学报》
CSCD
2017年第3期216-220,共5页
Journal of Water Resources and Water Engineering
基金
上海市自然科学基金项目(14ZR1428200)
关键词
深基坑开挖
顺作法
逆作法
基坑变形
数值模拟
deep excavation
top-down method
reverse construction method
deformation of foundationpit
numerical simulation
