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岩体变形模量是岩体工程设计最重要的参数之一,尽管其可以通过各种现场试验来获得,但因其耗时、费力、投资大,使得许多中小型工程及大型工程的初步设计阶段无法通过试验来得到这一参数。因此,许多研究者建立了诸多岩体变形模量与岩体物理力学参数或岩体质量分级之间的相关关系,如岩体变形模量与RQD、RMR分级、Q分级、岩体纵波速度等之间的关系,从而利用这些关系估算岩体变形模量。总结了已有估算岩体变形模量的各种方法,讨论了其应用条件及预测结果,重点分析了利用岩体纵波速度估算岩体变形模量的方法及存在的问题,并以玛尔挡坝址为实例,建立了相关预测公式。通过与已有估算方法的对比研究,阐明了各种方法预测结果的异同,表明其建立的估算公式与Barton等公式具有较好的一致性,可以用来估算岩体的变形模量。
Deformation modulus of rock mass is one of the most important parameters of rock mass engineering design. Although it can be obtained through various field tests, its initial design of many small and medium-sized projects and large-scale projects is expensive due to its time-consuming, labor- Phase can not be tested to get this parameter. Therefore, many researchers have established a lot of correlation between deformation modulus of rock mass and physical and mechanical parameters of rock mass or mass classification of rock mass, such as deformation modulus of rock mass and RQD, RMR classification, Q grade, longitudinal wave velocity of rock mass So as to use these relations to estimate the deformation modulus of rock mass. Various methods for estimating the deformation modulus of rock mass are summarized. The application conditions and prediction results are discussed. The methods and problems of using the longitudinal wave velocity of rock mass to estimate the deformation modulus of rock mass are analyzed emphatically. Dam site as an example, the establishment of the relevant prediction formula. Through the comparison with the existing estimation methods, the similarities and differences of the prediction results of various methods are clarified. The results show that the established estimation formulas are in good agreement with Barton’s equation and can be used to estimate the deformation modulus of rock mass.