地下空间开挖动态过程中支护结构受力分析

边金; 陶连金; 王文沛; 张波

doi:10.13204/j.gyjz201009024

地下空间开挖动态过程中支护结构受力分析

doi: 10.13204/j.gyjz201009024

1.
1. 北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100022;
2.
2. 广东海洋大学工程学院,广东湛江524088

基金项目:

国家自然科学基金项目(40272113);广东海洋大学引进人才启动项目(071201)

详细信息

作者简介:
边金，男，1976年出生，博士，讲师。E－mail:bianjin66@163.com

中图分类号: TU93
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出版历程
- 收稿日期: 2009-05-05
- 刊出日期: 2010-09-20

ANALYSIS OF SUPPORTING STRUCTURES DURING THE EXCAVATION PROCESS OF UNDERGROUND SPACE

1.
1. The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100022,China;
2.
2. Engineering College of Guangdong Ocean University,Zhanjiang 524088,China

摘要

摘要: 地下空间支护结构在开挖过程中的内力对其开挖的安全至关重要。通过使用计算软件FLAC2D，根据设计对北京北宫门车站的开挖过程进行计算分析，发现顶底板的轴力与其下土体的反弹变形和土体的水平压力有关；剪力与弯矩图与受均布荷载的简支梁的剪力和弯矩图相似，其值与其附近土体的位移相对值有关，因此，也导致了支护结构拐角处的应力集中；而且，从计算结果可以看出，该开挖方式和支护设计能适应周围土体产生的荷载。
- 地下空间 /
- 支护 /
- 位移 /
- 简支梁
Abstract: It is very important for the variation of internal forces of supporting structure during the excavation process of underground space. In this paper,modeling the excavation process of Beigongmen Subway Station was done with the calculation software FLAC2D,and after analysis the following conclusions were made: the axial force in the top and the bottom slabs was related with the displacement in soil near the slabs; the shear and the moment figures were similar to both of the simply-supported beam,and their values were concerned with the absolute displacement in soil near the slabs. Hence the stress concentration occured at the corner of the supporting structures; and the excavation method and the design of supporting structures were adaptive to the loads from the surrounding soil.
- underground space /
- support /
- displacement /
- simply-supported beam