This study investigates the asymmetrical arching phenomenon in inclined granular deposits by performing the DEM simulations of trapdoor tests.The results indicate that the weakest arching effect occurs at deposit incl...This study investigates the asymmetrical arching phenomenon in inclined granular deposits by performing the DEM simulations of trapdoor tests.The results indicate that the weakest arching effect occurs at deposit inclination angles of 30°∼45°,evidenced by the highest arching ratio on the trapdoor,largest deposit settlement,and lowest fabric anisotropy intensity.The asymmetrical arching effect is manifested by lower arching ratios,greater deposit settlements and larger fabric anisotropy magnitudes on the left part beside the trapdoor compared to the right part.The arching asymmetry depends on the angleΨformed between the potential failure plane's orientation and the deposit inclination direction,and this angle(Ψ_(L))for region L is on average lower than that(Ψ_(R))for region R.A largerΨ_(R) leads to a more notable inter-particle locking effect and a higher resistance to deformation for region R,which further causes larger arching ratios and less remarkable deposit settlements.Moreover,the arching asymmetry degree is positively correlated with the discrepancy betweenΨL andΨR.The disparity of mechanical responses between regions L and R aggravates with increasingΨ_(R)-Ψ_(L),and the strongest asymmetrical arching effect occurs around θ=30°,whereΨ_(R)-Ψ_(L) takes the maximum value.展开更多
基金support provided by the National Natural Science Foundation of China(grant Nos.42472343 and 52078507)the Natural Science Foundation of Guangdong Province(grant No.2024A1515011019).
文摘This study investigates the asymmetrical arching phenomenon in inclined granular deposits by performing the DEM simulations of trapdoor tests.The results indicate that the weakest arching effect occurs at deposit inclination angles of 30°∼45°,evidenced by the highest arching ratio on the trapdoor,largest deposit settlement,and lowest fabric anisotropy intensity.The asymmetrical arching effect is manifested by lower arching ratios,greater deposit settlements and larger fabric anisotropy magnitudes on the left part beside the trapdoor compared to the right part.The arching asymmetry depends on the angleΨformed between the potential failure plane's orientation and the deposit inclination direction,and this angle(Ψ_(L))for region L is on average lower than that(Ψ_(R))for region R.A largerΨ_(R) leads to a more notable inter-particle locking effect and a higher resistance to deformation for region R,which further causes larger arching ratios and less remarkable deposit settlements.Moreover,the arching asymmetry degree is positively correlated with the discrepancy betweenΨL andΨR.The disparity of mechanical responses between regions L and R aggravates with increasingΨ_(R)-Ψ_(L),and the strongest asymmetrical arching effect occurs around θ=30°,whereΨ_(R)-Ψ_(L) takes the maximum value.
