摘要
为定量评价与改进圆盘节理模型的建模精度,对经典块体理论进行改进,并考虑结构面实际位置和尺寸,以便计算具体的关键块体体积。改进后,将关键块体体积作为定量指标,结合正交设计与极差分析,从稳定性角度对圆盘节理模型的关键参数进行判断。随后,依据实测迹线图与模型生成的迹线图分别计算关键块体体积,对比二者之间的差异,对模型的关键参数进行反演优化,使关键块体体积相等,从而得到更符合实际岩体情况的建模参数。研究结果表明:关键块体体积可量化反映模型与实际岩体之间的差异;体密度为圆盘节理模型中的关键因素;若关键参数不经过优化,则模型与实际岩体之间可能存在较大差距;关键参数经反演优化后,可保证模型与实际岩体在稳定性方面更加吻合。
In order to quantitatively evaluate and improve the modeling accuracy of disk joint models, the classical block theory was improved, and the actual position and size of the structural plane were considered so that the specific key block volume could be calculated. After the improvements, the volume of the key block was taken as a quantitative index, combined with the orthogonal design and range analysis, and the key parameter of the disc joint model was judged from the perspective of stability. Then, according to the measured trace map and the trace map generated by the numerical model, the volume of the key blocks were calculated respectively, and the differences between them were compared. The key parameters of the model were inverted and optimized to make the volume of the key blocks equal, and thus the modeling parameters were more consistent with the actual situation of the rock mass. The results show that the volume of the key block can reflect the difference between the model and the actual rock mass quantitatively. The density of discontinuity is the key factor in the disc joint model.Without optimization, there may exist large gap between the model and the actual rock mass. After the inversion optimization of the key parameters, the stability of the model and the actual rock mass is more consistent.
作者
刘铁新
郑俊
刘爱娟
郑洪春
LIU Tiexin;ZHENG Jun;LIU Aijuan;ZHENG Hongchun(Department of Civil Engineering,Dalian Maritime University,Dalian 116026,China;Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China;China Three Gorges Corporation,Beijing 100382,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第10期2917-2924,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(41972264)
中央高校基本科研业务费资助项目(3132019349)。
关键词
圆盘节理模型
量化评价
块体理论
正交设计
反演优化
disc joint model
quantitative evaluation
block theory
orthogonal design
inversion optimization
