白莲河抽水蓄能电站F_8断层开挖与支护施工技术

Excavation and Supporting of F_8 Fault in Bailianhe Pumped-storage Power Station

白莲河抽水蓄能电站地下厂房F8断层是工程施工中遇到的影响最大的不利地质条件。通过采用科学合理的开挖方法,应用"锚杆+钢筋格构梁+挂网喷钢纤维混凝土+预应力锚索"的柔性支护处理技术,较好地完成了F8断层的处理施工,确保了洞室的稳定,减小了F8断层处理对主厂房施工直线工期的影响,保证了地下厂房整体开挖施工进度。

The Fs fault is the most adverse geological condition that encounters in underground powerhouse construction of Bailianhe Pumped-storage Power Station. By using scientific and rational excavation methods, and applying the flexible supporting which combines anchor rod, steel bar lattice girder, shoterete with steel fiber and pre-stressed anchor cable together, the Fs fauh is well treated. The treatment of Fs fault ensures the stability of cavern, reduces the impact on the duration of main powerhouse construction and guarantees the whole progress of excavation and construction.