深埋隧洞围岩双向流变特性试验  

The experimental on the biaxial rheological characteristics of the surrounding rock of deep buried tunnel

作　　者：朱明礼[1,2] 朱珍德[1,2] 唐胡丹[1,2] 陈卫忠[3] 冯夏庭[3] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《煤炭学报》2010年第2期208-212,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50674040);国家自然科学基金;二滩水电开发有限责任公司雅砻江水电开发联合研究基金重点资助项目(50539090);山东科技大学矿山灾害预防控制教育部重点建设实验室开放基金资助项目(MDPC0605);浙江省自然科学基金资助项目(2009C33049)

摘　　要：针对四川锦屏二级水电站深埋隧洞围岩在开挖与运营过程中呈现出显著的流变劣化特征,采用CSS-283双向万能实验机,对板岩进行双轴压缩流变特性的实验研究,分析岩石黏弹性变形随应力水平不同和时间发展的变化规律;基于四变量Burgers流变模型,应用弹性-黏弹性对应原理,导出了双轴流变方程的黏弹性解析解,并且根据板岩双轴流变曲线,反演出了各级流变参数;通过与试验结果的比较,说明该解析解能较好地描述岩石的黏弹性双轴流变特性。To the marked rheological and deteriorated characters appearing in process of the surrounding rock excava- tion and operation of the Jinping hydropower station deep buried tunnel, the experimental investigation on the biaxial compression rheological character of slate was done by using the CSS-283 two-way universal testing machine, the rela- tionship among stress level time and viscoelastic deformation disciplines of rock was analyzed. Based on Burgers rheo- logical model with four variables, the viscoelastic analytical expression of the biaxial rheological equation was derived by using the elastic-viscoelastic corresponding principle, and all levels rheological parameters were inversed according to the slate biaxial rheological curves. Compared with the test results, the established theoretical model can describe slate viscoelastic biaxial rheological characteristics better.

关 键 词：深埋隧洞 围岩 双轴流变 流变模型 黏弹性 

分 类 号：TU457[建筑科学—岩土工程]