基于掌子面岩体结构扫描的隧道岩体力学参数确定方法研究  

Study on the method for determination of mechanical parameters of tunnel rock mass based on structure scanning of tunnel face

作　　者：张成良 李鹏 王亚宁 闫祥 李明健 李珍 Zhang Chengliang;Li Peng;Wang Yaning;Yan Xiang;Li Mingjian;Li Zhen(Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China)

机构地区：[1]昆明理工大学公共安全与应急管理学院,云南昆明650093 [2]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《化工矿物与加工》2022年第3期21-26,共6页Industrial Minerals & Processing

基　　金：国家自然科学基金(51934003)。

摘　　要：由于岩体赋存环境的特殊性和复杂性,使得岩体具有明显的非均质、不连续及各向异性等特点,快速准确获取岩体力学参数对于岩土工程设计和施工意义重大。针对GSI围岩分级系统量化问题,以某隧道工程为背景,引入基于数码成像的掌子面地质特征信息系统,通过采集掌子面结构面信息数据,采用图像信息处理技术及掌子面图像网格划分法确定RQD值,并设计了相应的岩体力学参数计算流程,以快速确定不同围岩段的岩体力学参数;将新方法与BQ法、RMR法、费森科法、M.Georgi法进行对比分析,结果显示,新方法计算得到的岩体力学参数与BQ法相符、与RMR法等效、与费森科法和M.Georgi法较为接近。综合分析认为,采用新方法确定的岩体力学参数具有较高的准确性和合理性,可为快速获取岩体力学参数提供参考。Because of its special and complicated ore occurrence,the rock mass was characterized by heterogeneity,discontinuity and anisotropy.It is of great significance to obtain the mechanical parameters of rock mass quickly and accurately for geotechnical engineering design and construction.Aiming at the quantification of GSI surrounding rock classification system,taking a tunneling project as the context,this paper introduced the tunnel face geological characteristics information system based on digital imaging.Through the data acquisition from tunnel face structural plane,the RQD value was determined by using image information processing technology and grid method for tunnel face image,and the calculation process flow for corresponding mechanical parameters of rock mass was designed so as to quickly determine the RQD value of different sections of surrounding rock.The comparative study shows that mechanical parameters of rock mass resulted from the novel process conform to BQ process,equivalent to RMR process,approximates to Fisenko process and M.Georgi process.From the comprehensive analysis,it is believed that the mechanical parameters of rock mass,which is determined with the novel process,are of high accuracy and rationality.It provides a referential solution for rapid determination of the mechanical parameters of rock mass.

关 键 词：岩体力学参数 掌子面 地质强度指标 结构面特征 围岩力学参数 图像信息处理技术 网格划分法 

分 类 号：TU451[建筑科学—岩土工程]