摘要
针对浅埋暗挖中洞法的施工特点,结合北京地铁五号线天坛东门站工程,利用3D-σ有限元计算程序对其施工过程进行三维数值模拟,通过计算结果数据的整理与分析,总结了浅埋暗挖中洞法施工引起的地表沉降规律,得出中洞开挖、临时支撑拆除和二次衬砌施工是中洞法施工中对地层扰动较大工序的结论,并对今后类似施工提出了建议。
Based on the characteristics of the shield driven CRD method and taking the construetion of Tiantan East-station of Beijing No. 5 Subway as an example, the 3-dimention numerical imitation of the constructing process is calculated with the 3D-σ finite element program. The paper generalizes the pattern of ground surface settlement created by shield driven CRD method construction through an analysis of the results and draws the conclusion that excavating, temporary support removing and second-time lining are the key processes in middle cave construction. The paper also gives some advice for the similar construction in the future.
出处
《石家庄铁道学院学报》
2006年第4期70-73,共4页
Journal of Shijiazhuang Railway Institute
关键词
浅埋暗挖中洞法
施工过程
三维数值模拟
地表沉降
shield driven CRD method
constructing process
3-dimention numerical imitation
ground surface settlement
