车站明挖深基坑拆撑后围护结构稳定性分析

Analysis of the stability of exterior-protected structure of open excavated deep foundation pit in station after dismantling support

通过对北京地铁奥体中心站明挖深基坑变形规律的分析,从计算目的、计算原理、桩断面的计算等探讨了拆撑风险,以制定有效的预防措施,从而保证结构的整体受力,尽量消除现场施工误差影响。

Through analysis of deformation regularity of open excavated deep foundation pit in Olympic game center station in Beijing subway, the author discusses the risk of dismantling support from calculation purpose, calculation principle, and the calculation of pile cross section, in order to establish effective preventive measures, ensure structural overall force, and eliminate errors in on-site construction.