隧道管片极限变形的确定

The Limit Deformation of the R.C.Segment

结合广州地铁盾构隧道的具体情况,建立了一种由隧道管片最大允许裂缝宽度反算管片变形量的计算方法,为地铁隧道混凝土管片的变形控制提供了较为可靠的、可以直接测量的极限值。

Integrating with the situation of Guangzhou Metro, the author establishes a back - analysis method to calcu-ate the limit deformation fo tunnel segments corresponding to the pennissible crack width, and uses the calculated deformation as a limit value to control and monitor the defonnation of tunnel R.C. segments.