深基坑开挖过程中二维应力路径分析与研究  

Analysis and Research of 2D Stress Path in the Process of Deep Excavation

作　　者：梁志松[1] 

机构地区：[1]广东水利电力职业技术学院,广东广州510635

出　　处：《广东水利电力职业技术学院学报》2013年第1期44-51,共8页Journal of Guangdong Polytechnic of Water Resources and Electric Engineering

摘　　要：系统分析深基坑开挖过程中土体的应力路径变化,对具体基坑工程实例进行二维有限元分析,分析基坑在开挖施工过程中的各部位的应力路径的变化。分析结果表明:基坑开挖过程中周围土体的应力路径整体表现为卸载状态,不同方向的卸荷程度存在明显不同,可以明显区分为三种不同的区域,基坑土体的应力状态与支护结构的位移密切相关。The changes of stress path in the process of deep excavation are systematically analyzed. 2-D finite element method is used to simulate a real example of deep excavation. The changes of stress path in the various parts of deep excavation are studied in the process of construction. The results show that stress path of soil around deep excavation is in unloaded state, and the degree of unloading is significantly different in different directions. Deep excavation can be clearly divided into three regions, while the stress state of soil around deep excavation is closely related to the displacement of supporting structure.

关 键 词：应力路径 基坑 卸载 

分 类 号：TU470[建筑科学—结构工程]