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Experimental study on influencing factors of soil-root composite unconfined compressive strength

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2016 ASABE Annual International Meeting  162428455.(doi:10.13031/aim.20162428455)
Authors:   Changbin He, Yong You, Decheng Wang, Guanghui Wang, Hongjian Wu
Keywords:   Degraded natural grassland, soil-root composite, unconfined compressive strength.


Soil-root composites exist in the soil layer of the degraded natural grassland. The paper aimed to find the influencing factors of the soil-root composite unconfined compressive strength and the relationship between them. In order to study the influencing factors of soil-root composite, the orthogonal experiment was designed and unconfined compression test done. Unconfined compressive strengths were compared and evaluated. Results showed that the density, moisture content and roots content all affected unconfined compressive strength, and the unconfined compressive strength changed with the influencing factors‘ variation. Interaction function effects existed between the three factors. The moisture content and the interaction function of density and moisture content affected the unconfined compressive strength significantly. The unconfined compressive strength showed a significant correlation relationship with cohesion at 1% level of significance (P<0.01).There was a regression function between moisture content and cohesion.

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