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通过对二滩水电站右坝肩纤闪石化玄武岩软弱岩带的实地调查,并结合室内及现场流变试验结果,建立了该软弱岩带的流变模型——三参数固体模型。应用曲线求参及有限元反演方法获得两组流变参数,并在此基础上对现场岩体的流变参数进行预测,从而确立了该软弱岩带的本构方程。随后,引进金属材料研究领域的成果,利用“转换法”求得各级正应力下的长期抗剪强度,并对现场岩体的长期抗剪强度参数进行了预测。
Based on the field survey of the fiberburst petroid basalt soft rock zone at the right abutment of the Ertan hydropower station, combined with the indoor and in-situ rheological test results, a rheological model of the soft rock zone, a three-parameter solid model, was established. The rheological parameters of the two groups were obtained by the curve parameters and finite element inversion method. Based on this, the rheological parameters of the rock mass were predicted and the constitutive equation of the weak rock zone was established. Subsequently, the results of the research field of metal materials were introduced, and the long-term shear strength under normal stress at all levels was obtained using the “transformation method”, and the long-term shear strength parameters of the on-site rock mass were predicted.