钢筋桩与锚索在溢洪道岩锚墙稳定处理中的应用

Application of Steel-bar Pile & Anchor Cable in Stability Treatment of Anchored Rock Wall of Spillway

引子渡水电站大坝与溢洪道之间的预留岩锚墙,由于其底部岩体中存在软弱夹层,遇水极易软化,抗剪指标低,且施工时又为顺向坡切脚开挖,致使开挖过程中该部位岩体处于不稳定状态。为解决这一问题,采取了开挖减载、钢筋桩与锚索锚固等综合处理措施,保证了施工期和运行期的边坡稳定。

Retained in advance rock anchored wall between the dam and the spillway of Yinzidu Hydropower Station had been situated an un-stable status during excavated period,because there are existed soft strata in rock-body under them,they have low resistance to shear and will be softening easily once they meet water,as well as the excavation would be along consequent direction in the toe.In order to solve this problem,some treatment measures were adopted such as excavating for reducing the load,using steel-bar piles and anchor cable,resulting in ensuring stability of the sides during construction and operation periods.