| 粗粒料级配缩尺后最大干密度试验研究 |
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| 引用本文： | 褚福永,朱俊高,翁厚洋,叶洋帆.粗粒料级配缩尺后最大干密度试验研究[J].岩土力学,2020,41(5):1599-1604. |
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| 作者姓名： | 褚福永 朱俊高 翁厚洋 叶洋帆 |
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| 作者单位： | 1. 丽水学院 土木工程系，浙江 丽水 323000；2. 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；
3. 宏润建设集团有限公司，浙江 宁波 315700；4. 浙江省工程物探勘察院，浙江 杭州 310005 |
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| 基金项目： | 水利部堤防安全与病害防治工程技术研究中心开放课题基金资助项目（No. 2015004）；国家重点研发计划项目（No. 2017YFC0404801）；国家自然科学基金委员会-雅砻江流域水电开发有限公司雅砻江联合基金（No. U1865104）；国家自然科学基金（No. 51479052）。 |
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| 摘 要： | 对某级配粗粒料，采用剔除法、等量替代法、相似级配法和混合法等4种不同缩尺方法，依据规范要求进行缩尺。缩尺后替代级配料的最大颗粒粒径分别为20、40、60 mm。对各替代级配料采用振动台法进行了最大干密度试验，基于试验成果，结合分形理论，提出了一种将最大干密度与级配及细粒含量之间关系归一化的方法，并拟合了最大干密度与试验前级配的分形维数、小于5 mm颗粒的含量及最大粒径之间的关系，据此可推求出原型级配料的最大干密度，探讨了缩尺方法对替代料试验前后粒径分布曲线变化幅度的影响，总结出颗粒破碎分形维数与试验前级配的分形维数、小于5 mm颗粒含量及最大粒径之间的关系式，据此可推求出填筑后原型级配料的颗粒破碎分形维数。
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| 关 键 词： | 粗粒料 分形维数 级配 最大干密度 缩尺效应 颗粒破碎 |
| 收稿时间： | 2019-04-29 |
| 修稿时间： | 2019-12-06 |
Experimental study on maximum dry density of scaled coarse-grained soil |
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| CHU Fu-yong,ZHU Jun-gao,WENG Hou-yang,YE Yang-fan.Experimental study on maximum dry density of scaled coarse-grained soil[J].Rock and Soil Mechanics,2020,41(5):1599-1604. |
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| Authors: | CHU Fu-yong ZHU Jun-gao WENG Hou-yang YE Yang-fan |
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| Institution: | 1. School of Civil Engineering, Lishui University, Lishui, Zhejiang 323000, China; 2. Key Laboratory of Ministry of Education for
Geomechanics and Embankment Engineering, Hohai University, Nanjing, Jiangsu210098, China; 3. Hongrun Construction Group Co, Ltd.,
Ningbo, Zhejiang 315700, China; 4. Zhejiang Provincial Engineering Geophysical Prospecting Institute, Hangzhou, Zhejiang 310005, China |
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| Abstract: | According to the specification of scale reduction, four different scale reduction methods, including scalping method, equal-weight replacement method, similar grading method and mixing method, are used to reduce the scale of a coarse-grained soil into a grading with smaller particles, namely 20 mm, 40 mm and 60 mm.. A number of the maximum dry density tests are conducted by the vibrating method. Based on the test results and fractal theory, a normalizing method is proposed to describe the relationship between maximum dry density, grading and content of fine grains. Based on the newly proposed normalizing method, the relationship of dry density versus fractal dimension before tests and the content of grains smaller than 5 mm and maximum particle size is found. According to the founded relation, the maximum dry density of the real gradation is determined. In addition, the effect of scale reduction method on the variation amplitude of grain size distribution curves of coarse-grained soil specimens before and after tests is studied. And the relationship of fractal dimension of particle breakage versus fractal dimension before tests coefficient, the content of grains smaller than 5 mm and the maximum particle size is found. Based on the newly summarized relation, the fractal dimension of particle breakage of the real gradation after filling can be determined. |
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| Keywords: | coarse-grained soil fractal dimension gradation maximum dry density scale effect particle breakage |
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