粗粒料缩尺效应影响因素分析  

Analysis on the Impact Factor of Scale Effect by Coarse-grained Materials

作　　者：翁厚洋[1] 景卫华 李永红[3] 王观琪[3] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]南京市长江河道管理处,南京210011 [3]成都勘测设计研究院工程分院,四川成都610072

出　　处：《水资源与水工程学报》2009年第3期25-28,34,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(50579014);国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合基金项目(50639050)

摘　　要：总结了在研究缩尺效应对粗粒料强度及变形特性的影响规律时应考虑的影响因素主要包括缩尺方法的影响、替代料密度控制问题以及颗粒破碎对缩尺效应的影响等。对双江口堆石料进行了四种方法缩尺后试验料的三轴固结排水剪试验,振动压实试验,研究了强度及压实性的差异。分析了常用的缩尺方法的优缺点,指出室内试验时试验级配料试样密度控制的重要性以及合理的密度控制方法。分析了由于颗粒破碎引起试验土料级配变化从而影响缩尺效应评价的问题。最后,提出了缩尺效应研究中应综合考虑的几个问题。The impact of scale effect to the strength and deformation of coarse-graineed materials was summarized. The main impact factors mainly include the scale effect, density control to tested soil and particle breakage. Triaxial CD tests and maximum dry density tests were performed on four scaled soils for rockfill from Shuangjiangkou earth dam, and the difference of strength and compressive property are investigated. The advantages and limitations of various scaling methods ware analyzed. The significance and method for sample density were pointed. The problem for evaluation to inference of scale effect due to particle breakage was analyzed. Finally, several problems that should be paid more attention to the study of scale effect are presented.

关 键 词：粗粒料 缩尺效应 试验级配 原型级配 

分 类 号：TU411.3[建筑科学—岩土工程]