积石峡面板堆石坝材料大型三轴试验研究
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摘要
针对积石峡水电站砼面板堆石坝的筑坝材料,在清华大学2000 kN大型静/动三轴试验机上进行了大型三轴试验。概述了清华大学的2000 kN大型静/动三轴试验机的主要功能及性能指标,并就大型三轴试验所需用到的试验材料以及所采用的试验方法、步骤进行了详尽的阐述。对积石峡水电站砼面板堆石坝的主堆石和次堆石两种筑坝材料分别进行了3组大型三轴试验。基于已取得的试验结果,分析了坝料的应力应变和体变应变的关系,主要讨论了孔隙率对筑坝材料力学特性、变形特性等性能的影响,试验结论为该工程的应力变形计算和设计施工提供了试验依据。
A large-scale triaxial testing programme on materials of Jishixia Dam is presented by utilizing the 2000 kN static and dynamic triaxial apparatus in Tsinghua University.Firstly the main function and properties of the large-scale triaxial apparatus are expatiated,as well as the test materials and test method.A total of 6 groups of tests are conducted on main and sub rockfill materials of Jishixia Dam to study the stress-strain and volume-strain relation with different dry densities.The influences of porosity on the mechanics and deformation properties of rockfills are discussed.The results about the deformation behavior of rockfills are expected to provide experimental basis for engineering construction.
A large-scale triaxial testing programme on materials of Jishixia Dam is presented by utilizing the 2000 kN static and dynamic triaxial apparatus in Tsinghua University.Firstly the main function and properties of the large-scale triaxial apparatus are expatiated,as well as the test materials and test method.A total of 6 groups of tests are conducted on main and sub rockfill materials of Jishixia Dam to study the stress-strain and volume-strain relation with different dry densities.The influences of porosity on the mechanics and deformation properties of rockfills are discussed.The results about the deformation behavior of rockfills are expected to provide experimental basis for engineering construction.
引文
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[4]南京水利科学研究所院岩土工程研究所.土工试验技术手册[M].北京:人民交通出版社,2003.(GeotechnicalInstitute of Nanjing Hydraulic Research Institute.Soil testtechnical manual[M].Beijing:China Communications Press,2003.(in Chinese))
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[6]郑瑞华,程嵩,张建民,等.苗家坝面板堆石坝材料动力特性试验研究[J].世界地震工程,2010,26(12):357–361.(ZHENG Rui-hua,CHENG Song,ZHANG Ga,et al.Dynamic tests on rockfills of Miaojia CFRD[J].WorldEarthquake Engineering,2010,26(12):357–361.(inChinese))
[7]张建民,侯文峻,张嘎,等.大型三维土与结构接触面试验机的研制与应用[J].岩土工程学报,2008,30(6):889–894.(ZHANF Jian-min,HOU Wen-jun,ZHANG Ga,et al.Development and application of 3D soil-structure interfacetest apparatus[J].Chinese Journal of GeotechnicalEngineering,2008,30(6):889–894.(in Chinese))
[8]郑瑞华,于艺林,张嘎,等.面板堆石坝材料动力特性试验研究[C]//第七届全国青年岩土力学与工程会议.北京:2011:69–73.(ZHENG Rui-hua,YU Yi-lin,ZHANG Ga,etal.Dynamic tests on rockfills of CFRD[C]//The SeventhYouth Rock and Soil Mechanics and Engineering Meeting.Beijing,2011:69–73.(in Chinese))