摘要
以合肥地铁1号线、2号线换乘站大东门地铁偏压异型深基坑工程为背景,采用FLAC3D建立数值计算模型模拟开挖施工过程,考虑支护结构与土体的相互作用,计算和对比分析偏压异型深基坑地下连续墙的内力和变形,得到其分布规律。结果表明:深基坑支护结构异型点的主应力比直臂部分的主应力大,而且应力集中现象也较为明显,水平方向的变形比同等条件下直臂部分也要大,异型部分的受力和变形都是深基坑的最不利情况。
This paper takes He Fei Metro Line1,Line2 subway transfer station deep excavation engineering as the background,using FLAC3 Dto establish the model,simulating the process of excavation,what＇s more,the supporting systems of deep foundation pit are analyzed,considering the interaction between supporting structure and soil,calculating and analysing of the diaphragm wall internal forces and deformation,and by comparing the calculation results of various working conditions,the distribution law of the unsymmetrically loading and irregular diaphragm wall of internal force and deformation were obtained. The calculation and analysis results showed that the main stress of deep foundation pit supporting structure of irregular is bigger than the straight arm＇s,and the stress concentration phenomenon is more obvious,the horizontal deformation is larger than the arm＇s under the same conditions,the force and deformation for unsymmetrically loading and irregular is worst case in deep pit. The results of the study which is for future subway station deep foundation pit engineering design,construction provide the basis necessary reference.
出处
《河北工程大学学报（自然科学版）》
CAS
2016年第3期13-17,共5页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(51304057)
合肥市重点工程建设局科技支撑项目(2013CGAZ0771)
安徽省住房城乡建设厅科学技术计划项目(2013YF-27)
武汉市城建委科技计划项目(201620)
关键词
异型
深基坑
地连墙
内力
变形
FLAC3D
irregular
deep foundation pit
diaphragm wall
internal force and deformation
FLAC3D
