摘要
城市建筑物建设活动对邻近轨道交通的影响不可忽视。以上海地区某紧邻轨道交通的大规模桩基工程为研究背景,综合运用群桩共同作用的有限元求解方程和土体分层总和法,建立了分层土体中任意点的竖向附加应力与沉降计算方法。沉降计算结果表明,该项目的桩基工程在地铁车站与南区地下室交接处引起的预估沉降值最大,该预估沉降值可以满足上海轨道交通的位移控制标准。对比监测结果发现,实测沉降值小于预估沉降值,说明本文的理论计算偏于安全。所获得的分析结果对于工程后续开发建设和沉降监测具有工程参考价值。
The influence of urban building construction activities on adjacent metro lines is nonnegligible,and it is of great significance to carry out additional deformation analysis on adjacent metro lines.Based on a case of large-scale pile groups engineering adjacent to metro lines in Shanghai City,the vertical additional stress and settlement calculation formula are established based on the integrated use of pile groups finite element equation in layered soil and the layer-wise summation method.The settlement calculation results show that the maximum settlement caused by the pile groups is located at the junction of foreshore center and the metro Station,and the predicted settlement value meets Shanghai metro displacement control standard.The measured settlement is generally less than the predicted value and it indicated that the theoretical calculation is on the safe side.The obtained analysis results have engineering reference value for the subsequent construction and settlement monitoring.
作者
杨威
方衍其
梁发云
YANG Wei;FANG Yanqi;LIANG Fayun(Shanghai Investigation.Design&Research Institute Co.,Ltd.,Shanghai 200434,China;Department of Gcotechnical Enginecring,Tongji University,Shanghai 200092,China)
出处
《结构工程师》
北大核心
2020年第5期145-152,共8页
Structural Engineers
基金
国家自然科学基金资助项目(50708078)。
关键词
大规模群桩
轨道交通
分层地基
附加应力
沉降变形
large-scale pile groups
metro
layered foundation
additional stress
settlement
