对粗粒料4种级配缩尺方法的统一解释

郭万里; 朱俊高; 温彦锋

doi:10.11779/CJGE201608015

对粗粒料4种级配缩尺方法的统一解释 English Version

郭万里^{1, 2},
朱俊高^{1, 2},
温彦锋³

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098; 2. 江苏省岩土工程技术工程研究中心,河海大学,江苏南京210098; 3. 中国水利水电科学研究院岩土工程研究所,北京 100038

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2013CB036404）; 国家自然科学基金项目（51479052）; 江苏省六大人才高峰项目（JZ-011）

详细信息

作者简介:
郭万里(1990- ),男,博士研究生,主要从事土体基本性质及本构关系、土石坝工程研究。E-mail：guowljs@163.com。

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出版历程
- 收稿日期: 2015-07-02
- 发布日期: 2016-08-24

Unified description for four grading scale methods for coarse aggregate

GUO Wan-li^{1, 2},
ZHU Jun-gao^{1, 2},
WEN Yan-feng³

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China; 3. Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100038, China

摘要

摘要: 利用连续级配土的级配方程,对规范建议的剔除法、相似级配法、等量替代法和混合法缩尺后的级配计算进行了理论推导,并得出了一个统一的计算方程,同时揭示了该方程的4个参数d_max,b,m和C与原级配方程参数d_0max,b₀和m₀之间存在的定量关系。结果表明：4种方法的新参数m=m₀,剔除法和相似级配法C=0,剔除法和等量替代法b=b₀×/100,等量替代法C与和细颗粒含量P₅有关;与规范相比,可以简化级配缩尺计算,特别是对于混合法,可以先直接确定缩尺后的细颗粒含量P₅,通过一次计算即可得到缩尺后的级配方程,且其参数b和C都与所确定的P₅有关;缩尺后的统一方程揭示了各缩尺后的级配参数与原级配参数间的关系,在一定程度上使得定量、系统地研究缩尺效应成为可能。最后,利用该统一方程对糯扎渡堆石料的4种缩尺级配进行了计算演示,本方法与按规范计算结果基本一致。
- 粗粒料 /
- 缩尺计算 /
- 级配方程 /
- 缩尺效应
Abstract: A gradation equation is used to describe the four grading scale methods in the Chinese standard, which are exclusion method, similar grading method, equivalent substitution method and hybrid method, and a new and unified equation is put forward to calculate the gradation after reducing the scale. The relationship between the parameters (d_max, b, m and C) of the new equation and those of the old equation (d_0max, b₀ and m₀) is studied and revealed. The results show that the new parameter m of the four methods is m=m₀, and parameter C of the exclusion method and the similar grading method is C=0, and parameter b of the equivalent substitution method and the hybrid method is, and the parameter C of the equivalent substitution method is decided by and P₅. This method is simpler than the methods in the Chinese standard; and especially for the hybrid method, the fine particle content P₅ can be defined firstly. To some extent, the unified equation makes it possible to study the reduced scale effects quantitatively and systematically. At the same time, the reduced scale calculation of soil gradation for rockfill of Nuozhadu Dam is demonstrated according to this relationship.
- coarse-grained material /
- reduced scale calculation /
- gradation equation /
- reduced scale effect

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参考文献(15)

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