地铁车站端头盾构井的空间分析

地铁地下车站端头盾构井是整个车站结构受力最复杂的地方，为确保其施工阶段和使用阶段的安全，必须对盾构井结构进行准确分析。以深圳地铁2号线东延线工程岗厦北站东端盾构吊出井为例，利用ANSYS 13.0建立盾构井结构的空间计算模型，研究端头盾构井主体结构各主要构件的受力特性。结果表明：端头盾构井空间效应显著；通过建立空间计算模型可避免平面简化模型对墙体转角处边界约束条件和板侧向刚度的不合理假定。

Spatial Analysis of End Shield Well of a Subway Station

The end shield well of subway underground station is the structure with the most complicated stress condition. To ensure the safety of the end shield well during construction and operation, accurate stress analysis of shield well structure should be carried out. Taking Gangxia North metro station east end shield well on Shenzhen metro Line 2 east extension project as an example, authors studied the stress behavior of each major component of end shield well main structure by using ANSYS 13.0 to establish space computation model of shield well structure. Results of the study indicated that the space effect of end shield well is obvious and the space computation model can avoid unreasonable assumptions of the simplified plane model which neglects the boundary constraint of the wall corner and lateral plate stiffness. The calculated results have obvious value for reference by similar engineering projects.