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针对目前在水利水电工程中开挖扰动区的岩体力学参数取值问题,将岩体的声波速度与岩体质量指数Q、岩体分类指数RMR及地质强度指标GSI联系起来,并将声波速度引入到广义Hoek-Brown强度准则中,建立了由岩体声波速度及岩块单轴抗压强度预测开挖扰动区岩体的变形及强度参数的方法.利用三峡工程永久船闸边坡开挖扰动区的检测参数,结果表明,基于Hoek-Brown准则由声波速度及岩块强度预测的岩体变形模量与实测结果基本吻合,本方法可预测开挖扰动区的岩体力学参数.
Aiming at the problem of the mechanical parameters of rock mass disturbed by excavation in water conservancy and hydropower projects, the acoustic velocity of rock mass is related to rock mass mass index Q, rock mass classification index RMR and geological intensity index GSI. The acoustic velocity The generalized Hoek-Brown strength criterion is introduced to predict the deformation and strength parameters of rock mass disturbed by excavated rock mass based on acoustic velocity of rock mass and uniaxial compressive strength of rock mass.Using the excavation disturbance of the permanent shiplock slope of the Three Gorges Project The results show that the deformation modulus of rock mass based on Hoek-Brown criterion predicted by acoustic velocity and rock mass strength agrees well with the measured results, and the method can predict the rock mass mechanical parameters of disturbed area.