龙滩水电站泥板岩剪切流变力学特性研究  

Investigation on shear rheological mechanical properties of shale in Longtan Hydropower Project

作　　者：杨圣奇[1] 徐卫亚[1] 杨松林[1] 

机构地区：[1]河海大学岩土工程研究所,南京210098

出　　处：《岩土力学》2007年第5期895-902,共8页Rock and Soil Mechanics

基　　金：国家自然科学基金重点项目(No.50539110);中国博士后基金项目(No.20060400909);江苏省博士后科研资助计划项目(No.0601036B)

摘　　要：利用岩石剪切流变仪,对龙滩水电站泥板岩进行了剪切流变试验,分析了泥板岩剪切位移随时间的变化规律,探讨了不同应力状态下剪切流变速率的变化趋势,讨论了岩石剪切强度随时间的变化规律。将非线性流变元件(NRC模型)与西原模型串联起来,建立了新的能够描述加速流变特性的岩石非线性流变模型。采用泥板岩剪切流变试验曲线,对建立的黏弹塑性剪切流变模型进行了辨识,获得了岩石黏弹塑性剪切流变模型的材料参数,流变模型与试验结果的比较显示所建模型的正确性与合理性。Shear theology experiments were carried out for the shale in Longtan Hydropower Project by using a servo-controlled shear theology testing machine. The variation law of shear displacement of shale with the time is analyzed. The variation tendency of shear theological rates under different stress states is discussed. At the same time, the variation of shear strength of rock with the time is discussed. When the proposed nonlinear theological component （NRC model） by the author is parallel connected with Kormanura model; so that a new nonlinear theological model can be gained, which can describe the accelerating theological properties. Using the shear theological curves of shale, the proposed nonlinear viscoelastoplastic shear theological model of rock is identified, which gets the viscoelastoplastic theological parameters of the shale. The comparison between the rhelogical model and experimental result shows that the proposed theological model behaves reasonably well.

关 键 词：岩石力学 泥板岩 剪切流变 非线性流变元件(NRC模型) 非线性剪切流变模型 

分 类 号：TU452[建筑科学—岩土工程]