吉牛水电站蝶阀室边坡应急治理及安全监测分析

Analysis on Emergency Treatment and Safety Monitoring of Side Slope at the Butterfly Valve Chamber in Jiniu Hydropower Station

水电工程环境边坡在长期风化、卸荷与外动力条件作用下形成广泛分布的危险源,对水站施工和运营造成极大威胁。针对吉牛水电站蝶阀室边坡的工程实际情况,对已发生拉裂、蠕滑的危岩体进行应急治理,在边坡布设了GNSS表面变形测点、多点位移计和锚索测力计,对其进行边坡变形和拉应力监测,并对其监测资料进行分析。通过分析,找出边坡变形破坏的形成机制,制定出切实可行的应急治理方案,收到了较好的治理效果。

Widely-distributed hazard source is formed at the environmental slope of hydropower projects under the action of long-term weathering,unloading and external dynamic conditions,which poses a great threat to the construction and operation of hydropower stations.According to the actual engineering situation of slope at butterfly valve chamber of Jiniu hydropower station,emergency treatment is carried out for the dangerous rock mass with tension crack and creep.GNSS surface deformation measuring points,multi-point displacement meters and anchor cable dynamometers are arranged on the slope to monitor deformation and tensile stress.The monitoring data are analyzed to find out the formation mechanism of slope deformation and failure.A practical and feasible emergency treatment scheme has been formulated,and a good treatment effect has been obtained.