溧阳抽水蓄能电站地下厂房F54断层处理措施

摘要

溧阳抽水蓄能电站地下厂房工程地质条件差,特别是F54断层对地下厂房顶拱与边墙影响较大,对顶拱采取了“预应力锚索+喷钢纤维混凝土+系统锚杆+钢筋肋拱”的组合锚固处理方案,对边墙采取固结灌浆进行补强.监测资料表明,主厂房F54断层处围岩应力应变数值均处于收敛状态,说明所采用的处理措施和施工方法是有效合理的,保证了地下厂房的安全和稳定.%The engineering geological conditions of underground powerhouse in Liyang Pumped—storage Power Station are poor, especially the F54 fault has serious impact on the crown arch and sidewalls of powerhouse. The crown arch is treated by the combination of pre-stressed anchor cable, sprayed steel fiber reinforced concrete, anchor rods and reinforced rib arch. The actual monitor shows that the stress-strain values of main powerhouse's surrounding rocks at F54 fault are in a state of convergence. It means that the treatment measures and construction methods are effective and reasonable, and can ensure the security and stability of underground powerhouse.