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罗    鹏

（杨凌职业技术学院 交通与测绘工程分院 ，陕西 杨凌712100)

摘   要： 基于某地铁站基坑的开挖工程，在考虑支护结构与土层之间相互作用前提下，采用ABAQUS 软件进行二维平面有限元建模，通过计算分析施工过程中基坑周边地表沉降 、支护连续墙水平位移与弯矩的变化， 同时对比分析实际监测结果与数值计算结果 。结果表明： 开挖过程对邻近地表产生的影响较小，位移和沉降计  算值均处于相关规范的要求范围内； 由数值模拟计算的基坑周边地表最大沉降的计算值明显小于监测值，支护 结构的最大水平位移大于监测值； 采用二维有限元计算结果与实际监测数据较为接近，验证了数值模拟的有效性。

关键词： 基坑开挖； 隧道； 沉降； 数值模拟

中图分类号： TU41      

文献标志码： A      

文章编号： 1005-8249 (2023) 04-0015-05

DOI : 10. 19860/j.cnki.issn1005-8249.2023.04.003

LUO Peng

(Yangling Vocational and Technical College ’s Traffic and Mapping Engineering Branch, Yangling 712100, China)

Abstract：Based on a subway station foundation pit excavation project, considering the interaction between supporting structure and soil condition, using ABAQUS software to two-dimensional plane finite element modeling, through calculation and analysis in the construction of foundation pit supporting continuous wall surrounding the surface subsidence, horizontal displacement and bending moment of change, at the same time comparative analysis of the actual monitoring results and the numerical results. The results show that the excavation process has little influence on the adjacent surface, and the calculated values of displacement and settlement are within the requirements of relevant specifications. The calculated value of the maximum surface settlement around the foundation pit by numerical simulation is obviously smaller than the monitored value, and the maximum horizontal displacement of the supporting structure is larger than the monitored value. The two dimensional finite element calculation results are close to the actual monitoring data, which verifies the effectiveness of the numerical simulation.

Keywords：foundation pit excavation; tunnel; settlement; numerical simulation

∗ 基 金 项  目： 陕 西 省 职 业 技 术 教 育 学 会 （ 编 号： SGKCSZ2020-549) 。

作者简介： 罗鹏 ( 1984—) , 男，硕士，讲师，研究方向：道路与铁道工程。