摘要
某工程岸坡失稳、危岩、崩塌等重大地质问题突出,需要加强岸坡稳定性分析,而岩体抗剪强度参数的合理性直接影响分析结果的准确度。该文以室内实验获取的岩块抗剪强度参数为基础,采用折减法、工程岩体分级法、Hoek-Brown经验公式法、工程类比法分别确定了岩体抗剪强度参数,以各方法的可靠性排序设置权重因子,采用加权平均法确定了岩体抗剪强度参数建议值。经检验证明,建议值合理可靠,可在边坡稳定性精细化分析和设计优化时使用。
The bank slope instability,dangerous rock,collapse and other major geological problems of a project are prominent,so it is necessary to strengthen the analysis of the bank slope.The rationality of rock mass shear strength parameters directly affects the accuracy of the analysis of results.Based on the shear strength parameters of rock blocks obtained from indoor experiments,the shear strength parameters of rock masses are determined by reduction method,engineering rock mass classification method,Hoek Brown empirical formula method and engineering analogy method respectively.The weight factors are set according to the reliability ranking of each method,and the recommended values of rock mass shear strength parameters are determined by method of weighted mean.The test shows that the recommended value is reasonable and reliable,and can be used in the refined analysis of slope stability and design optimization.
作者
冯治国
赵永峰
鲁祖德
谭本兴
张伟
Feng Zhiguo;Zhao Yongfeng;Lu Zude;Tan Benxing;Zhang Wei(China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences)
出处
《勘察科学技术》
2023年第1期27-31,共5页
Site Investigation Science and Technology
关键词
力学性质
综合取值
岩体
抗剪强度
岸坡稳定性
mechanical properties
comprehensive value selection
rock mass
shear strength
slope stability
作者简介
冯治国(1985-),男,高级工程师,主要从事岩土工程勘察工作。
