花岗岩地层地铁隧道二次衬砌受力特性分析

Stress Analysis of Found Granite Subway Tunnel Secondary Lining

为了研究浅埋花岗岩地铁隧道二次衬砌力学特性,依托青岛地铁2号线五南区间隧道工程,采用现场监测方法得到浅埋花岗岩隧道初期支护与二次衬砌间的接触压力和二次衬砌内钢筋应力,并讨论该接触压力及钢筋应力随时间的发展规律和沿洞周的空间分布特性。

In order to study the mechanical properties of secondary lining in shallow granite subway tunnel,relying on the Qingdao Subway Line 2 Wu＇nan Tunnel engineering,on-site monitoring methods is adopted to obtain contact pressure and the secondary lining inside shallow granite tunnel initial support and secondary lining between steel stress,contact pressure and the discussion of the law of development and reinforcement stress over time and along the periphery of the hole spatial distribution.