The content of breakstone in red-bed mudstone has a direct influence on the rheological property, permeability, strength and subgrade deformation of the fillings after compaction. To investigate the fractal features of red-bed mudstone, we analyzed the particle size distribution, crushing rate, and fractal dimension of red-bed mudstone specimens of different moisture contents and coarse grain to fine grain ratios after compaction test. Results reveal that the particle size distribution of crushed mudstone is of typical fractal features, with the fractal dimension ranging between 2.418 and 2.529. With the increase of moisture content, the rate of crushing and the fractal dimension both increase correspondingly. When the initial content of P5 is relatively large, moisture content has a big influence on the growth of fractal dimension, but with the increase of initial coarse grain, the growth of fractal dimension slows down. Therefore we conclude that the rate of crushing and the fractal dimension have some correlation following the Gaussian normal distribution. They both increase with the increase of moisture content, and are in negative relationship with the initial content of P5.
Key words
red-bed mudstone /
compaction test /
crushing of particles /
rate of crushing /
fractal features /
normal distribution
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References
[1] 郭永春,谢 强,文江泉.我国红层分布特征及主要工程地质问题[J].水文地质工程地质,2007,34(6):67-71.
[2] 孙立军,冯文凯,吴 刚. 四川盆地红层区机场建设中的主要工程地质问题分析[J]. 工程勘察,2015,(1):11-15.
[3] 张国强,冯文凯,谢春庆,等. 风化裂隙水对高填方稳定性的影响评价[J]. 工程勘察, 2015, (4):1-6.
[4] 邵 磊,余 挺,迟世春. 堆石微裂缝扩展规律及其影响因素[J].长江科学院院报,2016,33(1):115-120.
[5] 刘汉龙,秦红玉,高玉峰,等.堆石粗粒料颗粒破碎试验研究[J].岩土力学,2005,26(4):562-566.
[6] 石修松,程展林.堆石料颗粒破碎的分形特性[J].岩石力学与工程学报,2010,29(增2):3852-3857.
[7] 石修松,程展林.堆石料颗粒破碎的连续时间Markov链模型[J].长江科学院院报,2010,27(6):38-42,48.
[8] 傅 华,凌 华,蔡正银.粗颗粒土颗粒破碎影响因素试验研究[J].河海大学学报(自然科学版),2009,37(1):75-79.
[9] 赵晓菊,凌 华,傅 华,等.级配对堆石料颗粒破碎及力学特性的影响[J].水利与建筑工程学报,2013,11(4):175-178.
[10]苏 明.考虑颗粒破碎的粗粒料力学特性研究综述[J].长江科学院院报,2015,32(5):82-88.
[11]杜 俊,侯克鹏,梁 维,等.粗粒土压实特性及颗粒破碎分形特征试验研究[J].岩土力学,2013,34(增1):155-161.
[12]傅 华,韩华强,凌 华.堆石料级配缩尺方法对其室内试验结果的影响[J].岩土力学,2012,33(9):2645-2649.
[13]MANDELBROT B B. The Fractal Geometry of Nature[M]. New York:W.H.Freeman and Company,1983.[14]谢和平.岩土介质的分形孔隙和分形粒子[J].力学进展,1993,23(2):145-164.
[15]HARDIN B O.Crushing of Soil Particles[J].Journal of Geotechnical Engineering, 1985, 111(10): 1177-1192.
[16]MARSAL R J. Large-scale Testing of Rockfill Material[J].Journal of the Soil Mechanics and Foundation Division,1967,93(2):27-43.
[17]MARSAL R J. Mechanical Properties of Rockfill Embankment Dam Engineering[M].New York: Wiley,1973:109-200.
[18]LEE K L, FARHOOMAND I. Compressibility and Crushing of Granular Soils in Anisotropic Triaxial Compression[J]. Canadian Geotechnical Journal, 1967,4(1): 68-86.
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