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地下厂房围岩变形具有非线性特点,是水电站系统多种影响因素作用的直观反映。基于泰安电站地下厂房围岩变形监测数据,将变形速率作为非线性动力模型一系列特解,反演出非线性动力模型;运用突变理论,建立围岩变形速率尖点突变模型,分析围岩的稳定性,同时进一步揭示围岩失稳过程。研究结果表明,该水电站地下厂房围岩处于稳定状态,与数值计算结果一致,说明该方法合理有效,可为同类工程提供一定参考。
The deformation of surrounding rock of underground powerhouse has non-linear characteristics and is an intuitive reflection of various factors affecting the system of hydropower station. Based on the deformation monitoring data of the surrounding rock of the underground powerhouse of Tai’an Power Station, a series of special solutions to the nonlinear dynamic model are used to inverse the nonlinear dynamic model. By using the catastrophe theory, a cusp catastrophe model of the surrounding rock deformation rate is established to analyze the stability of the surrounding rock While further revealing the process of rock instability. The results show that the surrounding rock of the underground powerhouse of the hydropower station is in steady state, which is consistent with the numerical results. It shows that the method is reasonable and effective and can provide reference for similar projects.