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  2021, Vol. 40 Issue (3): 640-648    DOI: 10.13722/j.cnki.jrme.2020.0591
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Study on evolution of particle breakage of carbonate soils based on fractal theory
LIN Lan1,2,LI Sa1,2,SUN Liqiang1,2,LI Tingting1,2,YIN Jiangsong1,2
(1. School of Civil Engineering,Tianjin University,Tianjin 300350,China;2. State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China)
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Abstract  Particle breakage will change the particle size distribution(PSD),which can significantly affect the physical and mechanical properties of corresponding soils. In this study,a series of impact load tests were performed to investigate the evolution of PSD in breakage state for uniformly and non-uniformly graded carbonate soils under impact loads. Based on the test results of uniformly graded samples as well as fractal theory,an evolution function was established to describe the PSD evolution in breakage state for uniformly graded carbonate soils. The function contains only two parameters including fractal dimension D and breakage probability pB,which are both the functions of the input energy Eb. The non-uniformly graded sample was assumed to be a collection of independent multiple uniformly graded groups,and,from the PSD evolution functions of these groups,an assembly matrix was proposed to describe the PSD evolution for non-uniformly graded samples in breakage state. The test results of two sets of non-uniformly graded samples show that the proposed method can well predict the PSD in breakage state for non-uniformly graded samples under different Eb.
Key wordssoil mechanics      carbonate soil      particle breakage      particle size distribution      evolution      fractal theory
     
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LIN Lan1
2
LI Sa1
2
SUN Liqiang1
2
LI Tingting1
2
YIN Jiangsong1
2
Cite this article:   
LIN Lan1,2,LI Sa1, et al. Study on evolution of particle breakage of carbonate soils based on fractal theory[J]. , 2021, 40(3): 640-648.
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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0591      OR      http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I3/640
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