Study on the Influence of Pit Excavation on the Stability of Underground Openings Using Different Models

被引：0
|
作者：
Yang, Yaxin [1 ]
Shao, Guojian [1 ]
Yu, Jingfu [2 ]
Chen, Guangyuan [3 ]
机构：
[1] Hohai Univ, Dept Engn Mech, Nanjing, Jiangsu, Peoples R China
[2] Nanjing Inst Architectural Design & Res Co Ltd, Nanjing, Jiangsu, Peoples R China
[3] Tongji Univ, Dept Bldg Engn, Shanghai 200092, Peoples R China
来源：
ADVANCES IN CIVIL AND INDUSTRIAL ENGINEERING, PTS 1-4 | 2013年 / 353-356卷
基金：
中国国家自然科学基金;
关键词：
Pit excavation; Underground openings; Plane strain model; Stability; Comparison;
D O I：
10.4028/www.scientific.net/AMM.353-356.1466
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Simplified plane strain model and 3-D model were used to research the influence of pit excavation on the stability of underground openings using the finite element method (REM). Conclusion from the 3-D FEM study is that the central region of the pit will have a large springback deformation and the openings will also float up at the same time because of large ranges of pit excavation. When using the simplified two-dimensional plane strain model for the analysis of this problem, the size of the excavation region leads directly to two completely inconsistent results. If the excavation region was wider than the openings the springback deformation would be obtained, while the settlement would be obtained if the opening was wider than the excavation region. Therefore the two-dimensional plane strain model is not proper for the analysis of the stability of the openings under this condition.
引用
收藏
页码：1466 / +
页数：2
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