岩土力学2012，Vol.33Issue(1)：65-72,77,9.
泥质砂岩蠕变特性与锚固控制效应试验研究
Experiment study of argillaceous sandstone creep characteristics and anchoring control effect
摘要
Abstract
Rock creep deformation and failure characteristics are discovered and rock creep velocity and propagation process under different stress paths are represented through argillaceous sandstone creep tests. A nonlinear creep model for argillaceous sandstone is set up. Creep characteristics of surrounding rock in underground engineering under the condition of plane strain and support are represented through the application of lateral and anchoring constraints, respectively. The research results show that anchoring constraint can increase the critical stress value that rock produces stable creep and decrease creep velocity evidently. The parameters for creep constitutive equation is determined by the fit of experimental data according the improved visco-elastoplastic creep model. The calculated strains according to the obtained parameters are in good accordance with experiment results, which can be effectively validated that the improved creep model describes the creep characteristics very well. This research is very significant for the study of deformation and stability of surrounding rock mass in deep underground engineering.关键词
蠕变/锚固/弹性模量/黏滞系数/西原模型/应力阀值Key words
creep/anchoring/elastic modulus/coefficient of viscosity/Nishihara model/stress threshold value分类
建筑与水利引用本文复制引用
韩立军,王延宁,蒋斌松,张后全,宗义江..泥质砂岩蠕变特性与锚固控制效应试验研究[J].岩土力学,2012,33(1):65-72,77,9.基金项目
国家自然科学基金资助项目(No.50774082,No.50804046) （No.50774082,No.50804046）
江苏省"青蓝工程"和"333高层次人才培养工程"资助. （）
