宝泉抽水蓄能电站地下厂房支护设计

Rock Support Design for Underground Power House of Baoquan Pump Storage Station

宝泉抽水蓄能电站地下厂房洞室群所处岩石综合评定属Ⅰ类围岩 ,采用喷锚支护作为永久支护。考虑洞室相互交叉及地应力的影响 ,喷锚支护按Ⅱ类围岩稳定所需要的支护抗力设计。喷锚支护设计以工程类比法初步选定支护参数 ,用极限平衡理论进行局部验算 ,并用有限元法评价喷锚支护整体加固效果。研究表明 ,地下厂房洞室群整体稳定。

The surrouding rock of underground power house of Baoquan pump storage power station is synthetically classified as sort Ⅰ. The rock bolts are designed for permanent supports. Considering the effect of tunnels intersecting and crustal stress, the strength of rock bolts is designed to meet the resisting force which is necessary for the stable of sort Ⅱ surrounding rock. Support parameters are preliminary chosen with engineering analogism, and partially checked with rock ultimate equilibrium theory method. The total anchorage effects are also analysed with three_dimension finite element method. The results show that the tunnels are stable and safe.