大渡河丹巴水电站长大深埋软岩各向异性及宏观力学参数研究  

Research on anisotropic mechanical characteristics and macro mechanical parameters of long and big deep soft rock of Danba hydropower station at Dadu River

作　　者：刘杰[1] 骆世威 李建林[1] 蔡健[1] 肖蕾[1] 

机构地区：[1]三峡大学 三峡库区地质灾害教育部重点实验室,湖北 宜昌 443002 [2]国电大渡河大岗山水电开发有限公司,四川 雅安 625000

出　　处：《岩土力学》2013年第10期2919-2927,共9页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.51009083);中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放研究基金项目(No.IWHR-SKL-2012221);宜昌市科学技术研究与开发项目(No.A2012-302-03);湖北省自然科学基金计划项目(No.2011CDB182)

摘　　要：研究了层状岩体各向异性以及宏观力学参数分析方法,提出基于大型岩土分析软件ADINA各向异性材料模块,采用分区分级宏观力学参数模拟分析方法,结合"代表单元体"理论思想,对丹巴水电站二云片岩进行了各向异性模拟和宏观力学参数分析,研究得到丹巴片岩不同片理倾角宏观力学参数以及各向异性特征变化规律。研究结果显示,丹巴二云片岩尺度增加,平行片理向、垂直片理向变形模量x E、y E收敛幅度不同步,y E变化幅度随倾角增大而增大,收敛速率更高,水平向变形模量x E趋势较平缓,泊松比的变化规律恰好与之相反;随片理面倾角增大,丹巴二云片岩力学参数趋于极限值规律明显。This paper studies the anisotropic mechanical characteristics of the layered rock mass and the analysis method of macro mechanical parameters. It proposes an anisotropic material modules on the basis of ADINA, uses the partition grading macro mechanical parameters simulation method, combining with the theoretical idea of representative unit to make an analysis of anisotropic mechanical simulation and macro mechanical parameters of the two-mica-quartz schist in Danba hydropower station. From the results, the different schistose angle parameters and variation rules of the anisotropic mechanical characteristics of Danba schist are obtained. The results show that with the increasing of two-mica-quartz schist in Danba, the convergence rates of parallel and vertical schistosity deformation modulus and are not synchronized, amplitude increases with the increase of angle, it has a higher convergence rate. The trend of horizontal deformation modulus is more gentle, the variation of Poisson＇s ratio is just the opposite; with the schistose angle increasing, the mechanical parameters of the two-mica-quartz schist in Danba tend to the limit value obviously.

关 键 词：各向异性 宏观力学参数 二云片岩 代表单元体 

分 类 号：TU451[建筑科学—岩土工程]