岩土力学2024，Vol.45Issue(1)：213-225,13.DOI:10.16285/j.rsm.2023.0090
考虑截面规则性的柱状节理岩体变形及强度特性研究
Deformation and strength characteristics of columnar jointed rock mass considering cross-sectional regularity
摘要
Abstract
The determination of mechanical parameters for columnar jointed rock mass is challenging due to its complex structure.Accurately estimating the strength and deformation of such rock masses is crucial for ensuring engineering safety.To address this issue,the authors developed a photosensitive resin mould using Voronoi diagrams and three-dimensional printing technology to create regular and irregular jointed rock mass specimens.Regular and irregular columnar jointed rock mass specimens with different dip angles were prepared and subjected to uniaxial compression tests.The resulting deformation and strength mechanical behaviors of the two types of rock masses were analyzed.The failure modes and mechanisms were summarized based on the final appearance of the specimens.Furthermore,the influence of joint surface materials on the failure mode and strength of columnar jointed rock mass was explained by combining the findings with existing research results.The authors proposed a modified joint coefficient method that better accounts for the structural characteristics of columnar jointed rock mass,building upon the traditional joint coefficient method.Using this modified method,empirical relationships were established between laboratory test results of regular and irregular columnar jointed rock mass and field deformation and strength parameters.The proposed calculation formula was then applied to the Baihetan Hydropower Station project,and the predicted results were compared with field measurements as well as predictions from the RMR(RMR is a rock quality evaluation index)and Q(Q is the quality index of rock mass)methods.The results demonstrated that the modified joint coefficient method provided the closest agreement with field measurements in terms of deformation and strength parameters.关键词
截面规则性/柱状节理岩体/变形及强度特性/物理模型试验/经验关系Key words
cross-sectional regularity/columnar jointed rock mass/deformation and strength characteristics/physical model test/empirical relationship分类
建筑与水利引用本文复制引用
朱姝,阙相成,朱珍德,朱其志..考虑截面规则性的柱状节理岩体变形及强度特性研究[J].岩土力学,2024,45(1):213-225,13.基金项目
国家自然科学基金资助项目(No.42307192,No.51878249,No.51579081).This work was supported by the National Natural Science Foundation of China(42307192,51878249,51579081). （No.42307192,No.51878249,No.51579081）
