万家寨引黄北干线1号隧洞模拟接缝的衬砌计算法

Tunnel Lining Computation by Joint-Simulating Method in No.1 Tunnel of North Main Line of Wanjiazhi Yellow River Diversion Project

万家寨引黄北干1号洞采用双护盾全断面岩石掘进机(简称"TBM")施工,衬砌的四块弧形管片厚25cm。在结构计算时,采取模拟接缝处理管片间的接缝,通过模拟接缝,使该接缝处的弯距变小,而剪力和轴力则基本不变,符合衬砌结构在接缝处传递弯距能力弱,而对剪力和轴力影响小的实际情况。

The No.1 tunnel in North Main Line of WYRDP is constructing by Full Section Double-shield Tunnel Boring Machine.Its Lining is composed by 4 hexagonal segments.The Lining＇s thickness is 25cm.In structure computation,joint-simulating method is adopted to treat the joints between segments.This method makes the moment in joint position decrease,and the shear force and axial force are unchanged almost.So that this mothod adapts the actual sitution that the trasfer capacity of moment in joint position is weak,and the trasfer capacity of shear and axial forces is not influenced.