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以某高速公路岩石路基为例,在FLAC3D辨识的基础上,重点分析了结构面间距、倾角等特征对岩体变形规律的影响。结果表明:数值模拟和现场测试岩体变形和变形模量的变化规律一致,相对误差和绝对误差均小于10%;结构面倾角效应的影响随着结构面间距的增大而逐渐减弱;结构面间距越大,承压荷载的影响范围越小,延展范围越小;结构面倾角和间距越大,岩体的变形模量就越大;对结构面效应下岩体变形特征的分析,有利于准确判断岩体路基的稳定性和承载力。
Taking a highway rock subgrade as an example, on the basis of FLAC3D identification, the influence of structural plane spacing, dip angle and other characteristics on deformation of rock mass is analyzed. The results show that the variation law of deformation and deformation modulus of rock mass are the same both in numerical simulation and field test, the relative error and the absolute error are all less than 10%. The influence of structural face dip angle gradually decreases with the increase of structural plane spacing. The larger the spacing is, the smaller the influence range of bearing load is and the smaller the extension range is. The larger the inclination and spacing of structural plane are, the larger the deformation modulus of rock mass is. The analysis of the deformation characteristics of rock mass under the effect of structural plane is in favor of Accurately determine the stability and bearing capacity of rock mass embankment.