基于声波速度及岩块强度的开挖扰动区岩体力学参数预测  

Prediction of rock mass mechanical parameters inexcavation disturbed zone by acoustic velocity and rock strength

作　　者：钟权[1] 陈明[1] 朱洋洋[1] 刘亮[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2013年第2期170-173,211,共5页Engineering Journal of Wuhan University

基　　金：国家重点基础发展规划计划(973)项目(编号:2011CB013501);国家自然科学基金资助项目(编号:51079111;51279146)

摘　　要：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 selecting rock mass mechanical parameters in excavation disturbed zone in water resources and hydropower engineering, The paper associates acoustic velocity of rock mass with rock quality index Q, rock classification index RMR and geological intensity index GSI; then introduces acoustic velocity into the generalized Hock-Brown strength criterion, and establishes a method for predicting rock mass deformation and strength parameters in excavation disturbed zone by acoustic velocity and rock uniaxial compressive strength. Based on the detection of excavation disturbed zone of slope in the per- manent navigation lock of Three Gorges Project. The results show that the calculated values of deformation modulus by acoustic velocity and rock strength nearly coincide with the actual measured results. This method can be used to predict rock mass mechanical parameters in excavation disturbed zone.

关 键 词：开挖扰动区 广义Hoek-Brown强度准则 岩体力学参数 声波速度 

分 类 号：TV31[水利工程—水工结构工程]