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苗尾水电站导流隧洞地质情况复杂,施工技术方案的选择要符合实际施工情况。突出重点,统筹兼顾,制定技术可靠、确保安全的开挖支护施工方案,特别是针对导流隧洞进口渐变段、断层和裂隙发育洞段、出口洞段等部位成洞稳定的影响因素,合理安排施工程序、制定有针对性的施工方案,有效控制围岩塑性区和围岩有害变形。
Miaowei Hydropower Station diversion tunnel geological situation is complex, the choice of construction technology program to meet the actual construction. Highlight the key points, make overall plans and take all factors into consideration, formulate construction plans for the excavation and support with reliable technology and ensuring safety, especially for the factors affecting the stability of cavities such as the entrance gradient section of the diversion tunnel, the development and fracture sections of the faults and outlets, Arrange construction procedures and formulate targeted construction plans to effectively control the plastic deformation of surrounding rock and the surrounding rock detrimental deformation.