摘要
为确保深基坑工程质量和周边道路、地下管线及建筑物的安全与稳定,较准确地进行深基坑地表沉降估算,分析了深基坑支护结构侧移与地表沉降的变形特征,对20个典型软土深基坑开挖监测数据进行了统计分析,分析了基坑地表沉降、支护结构侧移与开挖深度及地表沉降与支护结构侧移的关系。在现场监测数据和基坑数值分析资料的基础上,基于深基坑地表沉降曲线特征,提出了用偏心分布密度函数计算支护结构侧移引起的基坑地表沉降的预测方法,结合工程实例进行了验证,计算值与实测值吻合较好,该方法预测精度较高,具有较高的工程应用价值。
In order to ensure the engineering quality of deep foundation pit and the safety and stability of surrounding roads,underground pipeline and the buildings closer to deep foundation excavation,to accurately estimate the ground settlement of deep foundation pit beside excavation,the deformation characteristics of the lateral displacement of supporting structure for deep foundation pit and the ground settlement were analyzed. Through statistical analysis of monitoring data from 20 typical soft soil deep foundation pit excavations,the relationship between maximum ground settlement,maximum horizontal displacement of lateral supporting structure and depth of excavation were analyzed,at the same time the relationship between maximum ground settlement and maximum horizontal displacement was analyzed too. Analyzing field monitoring data and numerical calculation of foundation pit,according to the characteristics of the ground settlement profiles,the predictive method of ground settlement caused by horizontal deformation of lateral supporting structure for deep excavation was presented with eccentric distribution density function,the proposed method was verified in one deep excavation case with a high degree of accuracy through comparison the calculated value with the measured value,which proves to be a practical method for ground settlement prediction around deep excavation.
出处
《地下空间与工程学报》
CSCD
北大核心
2013年第S1期1753-1757,共5页
Chinese Journal of Underground Space and Engineering
关键词
深基坑
监测数据
变形特征
统计分析
偏心分布
地表沉降
deep foundation pit
monitoring data
deformation characteristics
statistical analysis
eccentric distribution
ground settlement
