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本文提出了用弹性平面问题复变函数理论进行位移反分析计算的方法和步骤,针对鲁布革水电站地下厂房模型洞的位移观测试验作了具体计算。反分析计算结果与实测资料非常接近,与有限元和边界元计算成果基本相符合,与地形地貌,上复岩体自重和地质结构面的力学形迹亦基本相符。不同观测断面反算成果均能相互验证。文中还讨论了弹性常数取用值误差对位移反分析计算成果的影响和地下厂房稳定性研究等问题。
In this paper, the method and steps of displacement inversion analysis using the theory of complex variable function of elastic plane problem are proposed. The displacement observation experiment of the model cave of the underground powerhouse at Lubuche Hydropower Station is calculated. The back analysis calculation results are very close to the measured data, basically consistent with the FEM and BEM calculation results, and basically consistent with the topography and geomorphology, the self-respect of the Shangfu rock mass, and the mechanical behavior of the geological structure plane. The back-calculated results of different observation sections can be mutually verified. The paper also discusses the influence of the error value of elastic constants on the calculation results of displacement back analysis and the study of the stability of underground powerhouses.