【摘要】 岩体力学参数的准确取值是岩土力学与工程领域关键科学问题之一.首先引入可考虑节理间距与数量的块体体积（V_b）参数，提出了基于V_b的地质强度指标（GSI）的计算公式，并将基于岩体波速（V_p）的岩体扰动参数（D）代入Hoek-Brown强度准则，提出了基于V_b和V_p的岩体力学参数估算方法.然后通过与已有GSI计算方法对比，验证了基于V_b计算GSI的正确性，并将基于V_b和V_p的岩体力学参数估算方法应用于田西高速的参数取值，同时将数值计算结果与现场调查、监测结果进行对比分析，验证了所提方法的可行性和准确性.该方法推广了Hoek-Brown强度准则的适用范围，并为工程建设初期试验资料不足情况下的参数取值提供了一种新的思路.更多还原

【Abstract】 Accurate selection of rock mechanics parameters has always been a key scientific problem in geotechnical mechanics and engineering area.To solve this problem,firstly,the parameters of joint spacing and quantitative block volume(V_b) are introduced,and the calculating formula of the geological strength index(GSI) is proposed based on block volume(V_b).Meanwhile,the calculation formula of the disturbed factor for rock masses(D) based on ultrasonic velocity(V_b) is given.The above GSI value and D value are introduced into the Hoek-Brown strength criterion,and a rock mass mechanical parameter estimation method based on the block volume(V_b) and the ultrasonic velocity(V_b) of the rock mass is proposed.Firstly,the validity of the calculation of the geological strength index(GSI) based on block volume(V_b) was verified by comparing it with the existing GSI calculation method.Then,the estimation method of rock mechanics parameters based on V_b and V_p was applied to the parameter evaluation of Tianxi Expressway.And the numerical calculation results were compared with the field investigation and monitoring results,so as to verify the feasibility and accuracy of the proposed method.This method extends the application scope of the Hoek-Brown strength criterion and provides a new idea for parameter selection in the case of insufficient experimental data at the initial stage of engineering construction.更多还原