堆石料缩尺效应的细观机制研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (890 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The scale effect of rockfill exists objectively and is influenced by many factors. The existing test results conducted by different researchers show different and even reverse trends. By employing the stochastic granular discontinuous deformation method(SGDD) considering particle breakage，the mesoscopic mechanism of rockfill scale effects is studied，and attempting to explain the reasons leading to different test results. This research mainly focuses on the effects of degree of compaction control standard and particle properties on scale effects of rockfill. The simulation results show that particle shape and grading have great influence on compaction capacity of rockfill，so the degree of compaction controlled by relative density is much more reasonable. With the increasing of maximum particle size，the uniformity coefficient of rockfill increases；particles provide a higher degree of interlocking and bring about a higher initial tangent modulus. The scale effects on rockfill strength is much more complicated，which is related with scaling method，degree of compaction control standard and particle?s own properties. The shear strength of rockfill comes from shear dilation，particle breakage and particle rearrangement. Under the influences of external factors，these three mechanisms of action will eliminate and replace each other. The final response depends on which factor is dominant. The attempt to find a universal model to describe the properties of scaled rockfill and to extrapolate the mechanical parameters of prototype rockfill is rarely practical. The research aimed at specific rockfill can be conducted.

Key words： soil mechanics rockfill scale effect mesomechanics scaling method degree of compaction control standard

Received: 04 May 2012

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

http://www.rockmech.org/EN/Y2012/V31/I12/2473

[9]	凌华，殷宗泽，朱俊高，等. 堆石料强度的缩尺效应试验研究[J]. 河海大学学报：自然科学版，2011，39(5)：540-544.(LING Hua，YIN Zongze，ZHU Jungao，et al. Experimental study of scale effect on strength of rockfill materials[J]. Journal of Hohai University：Natural Science，2011，39(5)：540-544.(in Chinese))
[1]	日本土质工学会. 粗粒料的现场压实[M]. 郭熙灵，文丹译. 北京：中国水利水电出版社，1998：7-17.(Japanese Society of Soil Mechanics and Foundation Engineering. Field compaction of coarse- grained materials[M]. Translated by GUO Xiling，WEN Dan. Beijing：China Water Power Press，1998：7-17.(in Chinese)) " target="_blank">
[5]	郦能惠，朱铁，米占宽. 小浪底坝过渡料的强度与变形特性及缩尺效应[J]. 水电能源科学，2001，19(2)：39-42.(LI Nenghui，ZHU Tie，MI Zhankuan. Strength and deformation properties of transition zone material of Xiaolangdi dam and scale effect[J]. Water Resources and Power，2001，19(2)：39-42.(in Chinese))
[6]	VARADARAJAN A，SHARMA K G，VENKATACHALAM K，et al. Testing and modeling two rockfill materials[J]. Journal of Geotechnical and Geoenvironmental Engineering，ASCE，2003，129(3)：206-218. " target="_blank">
[7]	王继庄. 粗粒料的变形特性和缩尺效应[J]. 岩土工程学报，1994，16(4)：89-95.(WANG Jizhuang. Deformation characteristics and scale effect of coarse-grained materials[J]. Chinese Journal of Geotechnical Engineering，1994，16(4)：89-95.(in Chinese))
[10]	翁厚洋，景卫华，李永红，等. 粗粒料缩尺效应影响因素分析[J]. 水资源与水工程学报，2009，20(3)：25-28.(WENG Houyang，JING Weihua，LI Yonghong，et al. Analysis of the impact factor of scale effect by coarse-grained materials[J]. Journal of Water Resources and Water Engineering，2009，20(3)：25-28.(in Chinese))
[14]	马刚，周伟，常晓林，等. 考虑颗粒破碎的堆石体三维随机多面体细观数值模拟[J]. 岩石力学与工程学报，2011，30(8)：1 671-1 682. (MA Gang，ZHOU Wei，CHANG Xiaolin，et al. Mesoscopic numerical simulation of rockfill considering particle breakage by using three- dimensional stochastic polyhedrons[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(8)：1 671-1 682.(in Chinese))
[12]	马刚，周伟，常晓林，等. 锚杆加固散粒体的作用机制研究[J]. 岩石力学与工程学报，2010，29(8)：1 577-1 584.(MA Gang，ZHOU Wei，CHANG Xiaolin，et al. Study of anchorage mechanism of granular mixture[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(8)：1 577-1 584.(in Chinese))
[17]	朱晟，王永明，翁厚洋. 粗粒筑坝材料密实度的缩尺效应研究[J]. 岩石力学与工程学报，2011，30(2)：348-357.(ZHU Sheng，WANG Yongming，WENG Houyang. Study of scale effect of density of coarse-grained dam materials[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(2)：348-357.(in Chinese))
[2]	MARACHI N D，CHAN C K，SEED H B. Evaluation of properties of rockfill mechanicals[J]. Journal of Soil Mechanics and Foundations Diversion，ASCE，1972，98(SM1)：95-114. " target="_blank">
[13]	马刚，周伟，常晓林，等. 堆石体三轴剪切试验的三维细观数值模拟[J]. 岩土工程学报，2011，33(5)：746-753.(MA Gang，ZHOU Wei，CHANG Xiaolin，et al. 3D mesoscopic numerical simulation of triaxial shear tests for rockfill[J]. Chinese Journal of Geotechnical Engineering，2011，33(5)：746-753.(in Chinese))
[16]	朱俊高，翁厚洋，吴晓铭，等. 粗粒料级配缩尺后压实密度试验研究[J]. 岩土力学，2010，31(8)：2 394-2 398.(ZHU Jungao，WENG Houyang，WU Xiaoming，et al. Experimental study of compact density of scaled coarse-grained soil[J]. Rock and Soil Mechanics，2010，31(8)：2 394-2 398.(in Chinese))
[3]	郦能惠. 高混凝土面板堆石坝新技术[M]. 北京：中国水利水电出版社，2007：101-110.(LI Nenghui. New technology of high concrete-faced rockfill dams[M]. Beijing：China Water Power Press，2007：101-110.(in Chinese)) " target="_blank">
[4]	司洪洋. 堆石缩尺效应研究中的几个问题[C]// 第六届全国土力学及基础工程学术会议论文集. 上海：[s. n.]，1991：163-169.(SI Hongyang. Some problem in the research of rockfill scaling effect[C]// Proceedings of the 6th National Soil Mechanics and Foundation Engineering Academic Conference. Shanghai：[s. n.]，1991：163-169.(in Chinese)) " target="_blank">
[8]	李翀，何昌荣，王琛，等. 粗粒料大型三轴试验的尺寸效应研究[J]. 岩土力学，2008，29(增1)：563-566.(LI Chong，HE Changrong，WANG Chen，et al. Study of scale effect of large-scale triaxial test of coarse-grained materials[J]. Rock and Soil Mechanics，2008，29 (Supp.1)：563-566.(in Chinese)) " target="_blank">
[11]	周伟，常晓林，周创兵，等. 堆石体应力变形细观模拟的随机散粒体不连续变形模型及其应用[J]. 岩石力学与工程学报，2009，28(3)：491-499.(ZHOU Wei，CHANG Xiaolin，ZHOU Chuangbing， et al. Stochastic granule discontinuous deformation model of rockfill and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(3)：491-499.(in Chinese))
[15]	中华人民共和国行业标准编写组. SL237—1999土工试验规程[S]. 北京：水利水电出版社，1999.(The Professional Standards Compilation Group of People?s Republic of China. SL237—1999 Specification of soil test[S]. Beijing：China Water Power Press，1999.(in Chinese)) " target="_blank">
[18]	刘萌成，高玉峰，刘汉龙，等. 堆石料变形与强度特性的大型三轴试验研究[J]. 岩石力学与工程学报，2003，22(7)：1 104-1 111.(LIU Mengcheng，GAO Yufeng，LIU Hanlong，et al. Large-scale triaxial test study of deformation and strength characteristics of rockfill materials[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(7)：1 104-1 111.(in Chinese))