超大直径土压平衡盾构穿越机场滑行道的安全控制技术研究

A Research of Safety Control Technology about Airport Taxiway Crossed by Super-largediameter EPB Shield

利用PECK法和有限元方法,对比研究超大直径土压平衡盾构在机场滑行道穿越过程中地面沉降的规律。通过建立三维数值模型模拟超大直径土压平衡盾构穿越机场滑行道的施工过程,研究该过程中滑行道变形的发展特性。进一步通过参数分析,研究开挖面压力等对于滑行道变形的影响。

The PECK method and the finite element method are used together to check the rule of the super-large-diameter earth pressure balance shield when crossing the ground subsidence in the airport taxiway. Through the construction process to establish a three-dimensional numerical model for simulating the super large diameter earth pressure balance shield through the airport taxiway, then the relevant developing characteristics of the taxiway deformation are researched. By the further parameter analysis, the influences of excavation surface on the taxiway deformation are studied fi nally.