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本文提出了一种反演确定围岩初始地应力及其参数的新方法,包括描述岩体变形的粘弹性时间效应的参数的反演确定。文中在假设围岩的性态服从三单元粘弹性模型以后,依据现场量测信息建立了反演计算的方程组,包括进行线弹性反演计算的虚拟应力法方程,以及确定参数E_2和η_2的反演计算方程。此外,文末还给出了算例验证,以及以这一方法进行的工程实例计算分析与讨论。
In this paper, a new method for inversion of the initial stress and its parameters of surrounding rock is proposed, including the inversion of the parameters describing the viscoelastic time effect of rock deformation. In this paper, after assuming that the behavior of the surrounding rock obeys the three-element viscoelastic model, the inversion calculation equations are established based on the on-site measurement information, including the virtual stress law equation for the linear elastic inversion calculation, and the determination of the parameters E_2 and η_2. Invert the calculation equation. In addition, at the end of the paper, the example verification and the calculation, analysis and discussion of engineering examples based on this method are also given.