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节理岩体中的节理面往往有一定厚度,如果采用无厚度的线性节理模型分析,其刚度参数的确定非常困难。通过分析弹性波穿过节理面时的波场效应,建立了基于节理后振动强度相等的波场等效法,用于确定带厚度节理的刚度参数,并分析了各因素对弹性波在节理上传播的影响。结果表明:线性节理面的刚度参数是节理岩体的固有属性,与外界荷载无关,采用波场等效法计算刚度参数可行;在弹性波范围内,这种等效参数与入射波频率、入射角等因素关系不大。该方法可用于有厚度节理面动强度参数的确定与分析,完善现有的节理面刚度取值方法。
The joints in the jointed rock mass tend to have a certain thickness. If the linear joint model without thickness is used, the determination of the stiffness parameter is very difficult. By analyzing the wave field effect when the elastic wave passes through the joint surface, the equivalent wave field method based on the joint vibration intensity is established to determine the stiffness parameter of the joint with thickness and the influence of various factors on the elastic wave propagation in the joint Impact. The results show that the stiffness parameter of linear joint surface is an inherent property of jointed rock mass. It is feasible to calculate the stiffness parameter by using the wave field equivalent method. In the range of elastic wave, this equivalent parameter is similar to the incident wave frequency, The relationship between other factors is not big. The method can be used to determine and analyze the dynamic strength parameters of the joint with thickness, and to improve the existing method of determining the stiffness of the joint surface.