运用围岩—结构共同作用模型分析西沟电站引水隧洞

Diversion Tunnel Structure Analysis of Xigou Hydropower Station Based on Surrounding Rock-structure Interaction Model

为了研究隧洞衬砌与围岩之间的相互作用,运用现代岩体力学模型,即围岩—结构共同作用模型对西沟水电站引水隧洞进行了有限元仿真分析。计算结果表明,隧洞上拱和下拱的交接处最容易受到破坏,建议将锚杆预留端头与混凝土衬砌中的钢筋焊接或绑扎在一起,必要时增加一些短插筋,同时对围岩进行固结灌浆。

A finite element simulation on the interaction of surrounding rock and the lining of Xigou Hydropower diversion tunnel was carried out by using surrounding rock-structure interaction model.The junctions of upper and lower arch were the most vulnerable to damage.After binding or welding the anchor and the steel bar in concrete lining together,and if necessary,adding some short ribs and conducting consolidation grouting,the damage can be avoided.