摘要
本文以北京三峡大厦深基坑开挖支护为工程背景,结合理论分析、现场监测和数值模拟等方法,对钢管复合土钉墙支护的作用机理和应用效果进行了研究。根据土力学和基坑支护相关原理确立力学机理模型,采用有限差分数值模拟方法进行开挖支护模拟,将数值模拟结果与实测基坑变形数据进行分析比较,二者结果基本一致,说明数值模拟方法应用于基坑开挖支护过程是比较可靠的,且从塑性区和变形分析可知用钢管桩复合土钉墙进行支护后的基坑是稳定的,即钢管桩复合土钉墙能很好地满足基坑支护稳定性的要求。
Taking the deep foundation excavation of Three Gorges building as research project, theoretical analysis, in-situ monitoring and numerical simulation were carried on in this paper. Based on the theories of soil mechanics and basic rules of associated codes, the mechanical model was established. Fast Lagrangian Analysis of Continua 3 D was used to simulate the excavation and shoring of the foundation slope. The com- parison and analysis of the data come from numerical simulation and in-situ monitoring indicated that the re- suits were basically consistent. It was certificated that the numerical simulation method was correct and fea- sible in the deep foundation project. The result from the analysis of the plastic zone and deformation showed that composite support of steel tube and soil nail wall can satisfy the requirements of foundation stability.
出处
《北京城市学院学报》
2014年第1期92-97,共6页
Journal of Beijing City University
基金
民办教育发展促进项目(北京城市学院新专业建设-给水排水工程专业建设:民办892-34)项目资助
关键词
钢管桩复合土钉墙
基坑
数值模拟
稳定性
composite support of steel tube and soil nail wall
deep excavation pit
numerical simulation
stability
