摘要
以郑州某深基坑工程为研究对象,根据工程提供的勘测报告和设计方案,运用FLAC3D软件对深基坑的开挖和支护过程进行模拟分析,分析土体内力和位移及支护结构内力随基坑开挖过程的变化规律。结果表明:在基坑开挖的底角部位和支护结构末端有明显的应力集中现象,水平位移云图也显示较大的位移发生在基坑的中下部;预应力锚索的轴力随基坑的开挖逐渐向下发展,且自由段长度上的轴力保持不变,锚固段长度上的轴力逐渐减小。
Taking a deep foundation pit project of Zhengzhou as the research object,according to the survey report and design scheme provided by the project,the deep excavation and supporting process are simulated and analyzed by using FLAC3 D. The internal force and displacement of soil mass and the internal force of supporting structure with excavation process are analyzed. The results show that there is obvious stress concentration in the bottom corner of excavation and the end of support structure,and the horizontal displacement cloud image also shows that larger displacement occurs in the middle and lower part of foundation pit. The axial force of prestressed anchor cable The excavation of the pit gradually develops downward,and the axial force on the length of the free section remains unchanged,and the axial force on the length of the anchorage section gradually decreases.
出处
《河南城建学院学报》
CAS
2017年第6期11-18,共8页
Journal of Henan University of Urban Construction
关键词
FLAC3D
复合土钉墙
数值模拟
内力
FLAC3D
composite soil nailing wall
numerical simulation
internal force
