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倾倒变形边坡是一类较为复杂的岩石边坡,其稳定性分析方法和评价标准尚无设计规范遵循,变形机理与加固处理设计理念与常规滑动模式边坡存在一定的差异,因而倾倒边坡的稳定性分析与治理往往成为工程的技术难题。针对苗尾水电站施工过程中右坝基边坡发生的较大范围倾倒拉裂变形,通过地质结构分析,并结合数值模拟,进行了右坝基边坡倾倒变形机理研究。在此基础上,提出了以预应力锚固为主,加强边坡排水的综合加固措施。数值计算和监测成果表明加固处理后边坡处于稳定状态。苗尾水电站右坝基边坡典型倾倒变形治理的工程实践,可为类似复杂工程边坡提供借鉴。
Dumping deformation slope is a kind of more complex rock slope. Its stability analysis method and evaluation standard have not been followed by design code. The design concept of deformation mechanism and reinforcement treatment has some differences with conventional sliding mode slope, The stability analysis and management often become engineering technical problems. In view of the large-scale dumping deformation of the right dam foundation slope during the construction of Miaowo Hydropower Station, the mechanism of the dumping deformation of the right dam foundation slope was studied through geological structure analysis and numerical simulation. On the basis of this, a comprehensive reinforcement measure based on prestressed anchorage is put forward to enhance slope drainage. The numerical calculation and monitoring results show that the slope is in a stable state after the reinforcement treatment. The engineering practice of typical dumping deformation control of right dam foundation slope of Miaowei Hydropower Station can provide reference for similar complex engineering slope.