复杂环境下城市建筑深基坑变形与数值模拟分析

Research on Deformation and Numerical Simulation Analysis of Urban Building Deep Foundation Pit in Complex Environment

文中以潍坊市站南广场基坑工程为例,通过现场布设的18个监测点,对复杂环境下城市建筑深基坑顶部竖向沉降和水平位移进行实时监测,变形最大值分别为21mm、21.4mm,均未超过预警值。利用FLAC 3D软件数值模拟,能够较好地反映实际开挖过程。结果表明,该支护设计方案确保了现场安全,对其他地区类似基坑工程设计与监测有重要参考意义。

The foundation pit project of zhannan square in Weifang City was taken as an example.18 monitoring points were arranged on site to monitor the vertical settlement and horizontal displacement of the top of deep foundation pit of urban buildings in complex environment.The maximum deformation values were 21 mm and 21.4 mm respectively,which did not exceed the early warning value.The numerical calculation results with FLAC 3 D software could better reflect the actual excavation process.The support design had been shown to ensure the site safety,and had important reference significance for the design and monitoring of similar foundation pit projects in other areas.