锦屏一级水电站左岸坝肩复杂地质条件高陡边坡处理

 针对锦屏一级水电站坝岸边坡倾倒变形和拉裂破碎岩体，全坡面采用锚喷支护加框格梁网格结合深层锚索加固。针对由f42–9断层、SL44–1深部裂缝和煌斑岩脉X组成的、控制左岸边坡整体稳定的潜在大滑块，设置3层抗剪洞，并通过在坡面布置穿过断层的深层锚索进行加固处理。施工过程中建立“动态设计、科研跟踪、安全监测与反馈分析、信息化动态治理”的理念和机制，根据开挖揭示的地质条件和安全监测资料，结合施工情况，跟踪开展边坡稳定分析与安全监测实时分析，开展设计优化并严格控制施工程序，保证左岸坝肩边坡安全顺利下挖。

TREATMENT OF HIGH AND STEEP SLOPES WITH COMPLICATED GEOLOGICAL CONDITIONS AT LEFT ABUTMENT OF JINPING I HYDROPOWER STATION

To deal with the toppling deformation and fracture rock-mass problem at the embankment slope in Jinping hydropower station,the whole slope surface is reinforced by shotcrete support,rock bolting and frame pier with prestressed cable.The integral stability of left slope is controlled by the potential large sliding body which is composed by fault f42-9,deep crack SL44-1 and lamprophyre dike X.Some three-layer anti-shear tunnels on the sliding body are designed;and a lot of deep perstressed cables across the faults are placed at the slope surface to reinforce the sliding body.A management system,which follows the principle of dynamic design,scientific study tracking,safety monitoring and immediate reacting analysis,and dynamic management informationization,is established.According to the geological conditions and safety monitoring data during excavation,combining with construction situation,slope stability analysis and real-time safety monitoring could be conducted;in addition to the optimization of design and strict controlling of construction procedure,excavation work of the left embankment slope finally goes on smoothly.