粗粒筑坝材料密实度的缩尺效应研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (610 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要针对已有研究成果忽视密实度缩尺效应对粗粒筑坝料力学性质影响的问题，根据双江口300 m级土石坝堆石料的原平均设计级配曲线，采用4种不同缩尺方法得到室内干密度极值试验成果，利用粗粒筑坝材料的级配设计母线——Talbot曲线，引入分形几何理论，选取对级配性质较为敏感的Talbot公式的指数n以及反映颗粒形状与粗糙度的因子作为分形指标，解译粗粒料密实度出现缩尺效应的内在原因，为粗粒料级配构成对密实度影响的量化评价提供依据，克服以往只能利用不均匀系数和曲率系数进行模糊评价的缺点。利用PFC2D软件，结合混合法各缩尺比级配进行干密度极值数值试验，研究缩尺效应对粗粒料的相对密度、孔隙率的影响规律，并分析引起其差异的细观机制。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：水利工程, 土石坝, 粗粒料, 密实度, 缩尺效应, 分形几何

Abstract：The scale effect of density on the mechanical properties of coarse-grained dam materials is ignored in previous studies. On this basis，four scale methods are used to obtain the maximum dry density in laboratory according to the original average design gradation curve of rockfill in Shuangjiangkou earth-rockfill dam. Based on the design generatrix of the coarse-grained dam materials gradation—Talbot curve and fractal geometry theory，the mechanism of scale effect of density for coarse-grained dam materials is interpreted，which selects the Talbot formula index and the factor reflecting the particle shape and roughness as the fractal indices. The basis of quantitatively evaluating the effect of gradation on density is provided；and the shortcomings of fuzzy evaluation only using the non-uniformity coefficient and curvature coefficient is overcome. Combined the mixed scale method，the numerical tests on the maximum dry density is carried out by using the particle flow code in two dimensions(PFC2D)；the law of scale effect on the relative density and porosity of coarse-grained materials is studied；and the microscopic mechanism causing the difference is analyzed.

Key words： hydraulic engineering earth-rockfill dam coarse-grained materials density scale effect fractal geometry

收稿日期: 2010-08-11

引用本文:

朱晟1，2，王永明1，2，翁厚洋1，3. 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 Sheng1，2，WANG Yongming1，2，WENG Houyang1，3. STUDY OF SCALE EFFECT OF DENSITY OF COARSE-GRAINED DAM MATERIALS. , 2011, 30(2): 348-357.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I2/348

[20]	徐永福. 我国膨胀土的分形结构的研究[J]. 河海大学学报，1997，25(1)：18-23.(XU Yongfu. On fractal structure of expansive soils in China[J]. Journal of Hohai University，1997，25(1)：18-23.(in Chinese))
[1]	BISHOP A W，HENKEL D J. The measurement of soils properties in the triaxial test[R]. London：Edward Arnold Ltd.，1948. " target="_blank">
[3]	MARSAL R J. Large scale testing of rockfill materials[J]. Journal of Soil Mechanics and Foundation Division，1967，93(2)：27-43. " target="_blank">
[5]	MOGAMI T. 日本颗粒材料的发展[R]. 1977.(MOGAMI T. The development of granular materials in Japan[R]. [S.l.]：[s.n.]，1977.(in Chinese)) " target="_blank">
[7]	孟宪麒，史彦文. 石头河土石坝砂卵石抗剪强度[J]. 岩土工程学报，1983，5(1)：90-101.(MENG Xianqi，SHI Yanwen. Shear strength of sandy-gravels in Shitouhe river dam[J]. Chinese Journal of Geotechnical Engineering，1983，5(1)：90-101.(in Chinese))
[9]	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 of coarse aggregates and the scale effect[J]. Chinese Journal of Geotechnical Engineering，1994，16(4)：89-95.(in Chinese))
[11]	梅迎军，梁乃兴，李志勇. 尺寸效应对砂砾石变形特性的分析[J].重庆交通学院学报，2005，24(2)：80-82.(MEI Yingjun，LIANG Naixing，LI Zhiyong. Dimension effect to the deformation characteristic of aggregate[J]. Journal of Chongqing Jiaotong University，2005，24(2)：80-82.(in Chinese))
[13]	中国水电工程顾问集团中南勘测设计研究院. 水布垭水电站混凝土面板堆石坝筑坝材料工程特性研究[R]. 长沙：中国水电工程顾问集团中南勘测设计研究院，1998.(Mid-south Design and Research Institute of CJECC. Engineering properties of Shuibuya CFRD materials[R]. Changsha：Mid-south Design and Research Institute of CJECC，1998.(in Chinese)) " target="_blank">
[14]	朱晟，梁现培，冯树荣. 基于现场大型承载试验的筑坝原级配堆石料力学参数反演研究[J]. 岩土工程学报，2009，31(6)：155-160.(ZHU Sheng，LIANG Xianpei，FENG Shurong. Back analysis of mechanical parameters of naturally graded rockfill materials based on large-scale loading plate tests[J]. Chinese Journal of Geotechnical Engineering，2009，31(6)：155-160.(in Chinese)) " target="_blank">
[15]	高莲士，蔡昌光，朱家启. 堆石料现场侧限压缩试验解耦K-G模型参数分析方法及在面板坝中的应用[J]. 水力发电学报，2006，25(6)：26-33.(GAO Lianshi，CAI Changguang，ZHU Jiaqi. An analysis method for uncoupled K-G model parameters in site confined compression test of rock-fill materials and its application on CFRD[J]. Journal of Hydroelectric Engineering，2006，25(6)：26-33.(in Chinese)) " target="_blank">
[17]	杨贵，刘汉龙，陈育民，等. 堆石料动力变形特性的尺寸效应研究[J]. 水力发电学报，2009，28(5)：122-126.(YANG Gui，LIU Hanlong，CHEN Yumin，et al. Research on size effect of rockfill materials on dynamic deformation property[J]. Journal of Hydroelectric Engineering，2009，28(5)：122-126.(in Chinese)) " target="_blank">
[18]	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：中国水利水电出版社，1999.(The Professional Standards Compilation Group of People?s Republic of China. SL237-1999 Specification for soil test[S]. Beijing：China Water Power Press，1999.(in Chinese)) " target="_blank">
[21]	杨培岭，罗远培，石元春. 用粒径的重量分布表征的土壤分形特征[J]. 科学通报，1993，38(20)：1 896-1 899.(YANG Peiling，LUO Yuanpei，SHI Yuanchun. Fractal feature of soil on expression by weight distribution of grain size[J]. Chinese Science Bulletin，1993，38(20)：1 896-1 899.(in Chinese))
[24]	李昌彩. 水布垭面板堆石坝前期关键技术研究[M]. 北京：中国水利水电出版社，2005.(LI Changcai. Shuibuya CFRD key technologies in prophase[M]. Beijing：China Water Power Press，2005.(in Chinese)) " target="_blank">
[25]	史彦文，田树玉. 大粒径粗粒土极限密度的模型规律及其应用[J]. 水资源与水工程学报，2006，17(6)：42-47.(SHI Yanwen，TIAN Shuyu. Model regularity of the limiting density of the large particle size soil and its application[J]. Journal of Water Resources and Water Engineering，2006，17(6)：42-47.(in Chinese)) " target="_blank">
[4]	MARACHI N D，CHAN C K，SEED H B. Evaluation of properties of rockfill materials[J]. Journal of Soil Mechanics and Foundation Division，1972，98(1)：95-114. " target="_blank">
[22]	舒志乐. 土石混合体微结构分析及物理力学特性研究[硕士学位论文][D]. 成都：西华大学，2007.(SHU Zhile. Microstructure analysis of soil-rock mixture and physical and mechanical properties[M. S. Thesis][D]. Chengdu：Xihua University，2007.(in Chinese)) " target="_blank">
[2]	HANNES R C. The strength of gravel indirect shear testing of soils[R]. [S. l.]：Матернади Симпозиума ло Механика Грунтов，1953. " target="_blank">
[6]	RAMAMURTHY T，GUPTA K K. Response paper to how ought one to determine soil parameters to be used in the design of earth and rockfill dams[C]// Proceedings of Indian Geotechnical Conference. New Delhi，India：[s.n.]，1986：15-19. " target="_blank">
[8]	司洪洋，朱铁. 小浪底坝堆石料试验研究——堆石料的缩尺效应[R]. 南京：南京水利科学研究院，1990.(SI Hongyang，ZHU Tie. Xiaolangdi rockfill dam study—scale effect of rockfill[R]. Nanjing：Nanjing Hydraulic Research Institute，1990.(in Chinese)) " target="_blank">
[10]	郦能惠，朱铁，米占宽. 小浪底坝过渡料的强度和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]. Hydroelectric Energy，2001，19(2)：39-42.(in Chinese)) " target="_blank">
[12]	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)：564-566.(LI Chong，HE Changrong，WANG Chen，et al. Study of scale effect of large-scale triaxial test of coarse-grained meterials[J]. Rock and Soil Mechanics，2008，29(Supp.1)：564-566.(in Chinese)) " target="_blank">
[16]	花俊杰，周伟，常晓林，等. 堆石体应力变形的尺寸效应研究[J]. 岩石力学与工程学报，2010，29(2)：328-335.(HUA Junjie，ZHOU Wei，CHANG Xiaolin，et al. Study of scale effect on stress and deformation of rockfill[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：328-335.(in Chinese))
[19]	OCHIAI M，OZAO R，YAMAZAKI Y，et al. Self-similarity law of particle size distribution and energy law in size reduction of solids[J]. Physica A：Statistical Mechanics and its Applications，1992，191 (1-4)：295-300. " target="_blank">
[23]	LEES G. The measurement of particle shape and its influence in engineering materials[J]. Journal of British Granite and Whinestone Federation，1964，4(1)：1-22. " target="_blank">