Abstract: Under the new situation of hydropower development, Yangfanggou hydropower station is the first large hydropower project under the EPC contract mode in China. During construction of the dam site slope, due to the characteristics of complex geological conditions, high and steep slope, huge scale and tight construction period, it was urgent to systematically carry out research on the key technologies of dynamic feedback design and stability control of high rock slope excavation. Relying on the integrated and efficient management mode and the mutual trust mechanism of this project, an interconnected man- agement system that deeply integrates design, construction and digitization was proposed, and a techni- cal team and innovation platform that closely integrate construction, design, geology, monitoring, scientif- ic research and information were established, which provided an important guarantee system for the sci- entific, safe and efficient construction of slope. Through systematic research and development of com- plete sets of complex technical problems in engineering, a method system of dynamic feedback analysis and decision optimization for large-scale complex high rock slope during construction period was estab- lished, which guaranteed the engineering safety and stability of the 300 m high rock slope in this mil- lion-kilowatt hydropower station. The relevant technical methods and research results have been summa- rized and refined to form a practical standardized method, which has the value of popularization and ap- plication.

Key words:  , high rock slope, dynamic design, numerical simulation, stability control

摘要： 在当前水电发展的新形势下，杨房沟水电站作为国内首个设计施工一体化总承包模式建设的大型水电项目，在工程建设中，坝址区边坡因具有地质条件复杂、边坡高陡、规模巨大、工期紧凑等特点，亟需系统性开展岩质高边坡开挖动态反馈设计与稳定控制关键技术研究。现场依托该工程建设的一体化高效管理模式和互信机制，提出了设计-施工-数字化深度融合的联动管理体系，建立了紧密融合施工、设计、地质、监测、科研、信息等多专业于一体的技术团队和创新平台，为边坡科学、安全、高效建设提供了重要保障体系。通过系统性开展工程复杂技术问题的成套技术研发，建立了大型复杂岩质高边坡施工期动态反馈分析与决策优化方法体系，保障了该百万千瓦级水电站300 m 级岩质高边坡的工程安全稳定。相关技术方法和研究成果已经总结提炼形成了实用的标准化方法，具有推广应用价值。

关键词: 岩质高边坡, 动态设计, 数值模拟, 稳定控制