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Analysis of the correlation between strength and fractal dimension of gravelly soil in debris-flow source areas

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Show simple item record Na, He Tao, Li Wei, Zhong Cosgrove, Tom Mei, Zeng 2020-03-02T15:28:05Z 2020-03-02T15:28:05Z 2016
dc.identifier.issn 1874-1495
dc.description peer-reviewed en_US
dc.description.abstract Particle size distribution of gravelly soil plays a crucial role in debris flow initiation. For better understanding the mechanism of debris flow formation, two crucial mechanical property parameters of the gravelly soil are required to be studied meticulously: hydraulic conductivity and strength. With the aim of measuring the composition of the gravelly soil, 182 soil samples were taken from debris flow prone areas. With the aid of a sieve test, the particle size distribution of the samples can be obtained and analyzed. Then fractal theory was employed to compute the fractal dimension of the soil samples. By analyzing the results of sieve test (particle size distribution curves) and the results of the fractal theory calculations, the relationship between fractal dimension and particle size distribution can be explored. The results illustrate that the particle compositions of the gravelly soil tends to remain uniform as the fractal dimension increases. Moreover, as the coarse particle content increases, the fractal dimension decreases. To better understand the formation mechanism of debris flows, direct shear tests were conducted. Subsequently the experimental results were analyzed. By analysis, the following conclusions can be drawn: the soil strength decreases as the fractal dimension increases, and for soils with lower moisture content and identical dry density, a linear relationship between fractal dimension and cohesion force was identified. Moreover, cohesion force and internal friction force both decrease as the fractal dimension increases, but the internal friction angle decreases slightly while the cohesion force decreases greatly. Therefore we concluded that soil strength decreased mainly due to the reduction in cohesion force. en_US
dc.language.iso eng en_US
dc.publisher Bentham Open en_US
dc.relation.ispartofseries The Open Civil Engineering Journal;10, pp. 866-876
dc.subject Debris flow en_US
dc.subject Fractal features en_US
dc.subject Fractal theory en_US
dc.subject Gravelly soil en_US
dc.subject Particle composition en_US
dc.subject Strength en_US
dc.title Analysis of the correlation between strength and fractal dimension of gravelly soil in debris-flow source areas en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US 2020-03-02T15:22:53Z
dc.description.version PUBLISHED
dc.identifier.doi 10.2174/1874149501610010866
dc.contributor.sponsor Henan Polytechnic University en_US
dc.contributor.sponsor National Natural Science Foundation en_US
dc.relation.projectid B2015-58 en_US
dc.relation.projectid 51178402 en_US
dc.relation.projectid 41302284 en_US
dc.relation.projectid 318740240 en_US
dc.relation.projectid CKWV2015205/KY en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2890564
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Open Civil Engineering Journal
dc.description.status peer-reviewed

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