Influence of Sedimentary Direction on Mechanical Characteristic of Saturated Dense Sand

LUO Qiang; TANG Zhen; MA Ke-shuan; WANG Kui-yang

doi:10.11988/ckyyb.20180968

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Journal of Changjiang River Scientific Research Institute ›› 2020, Vol. 37 ›› Issue (1) : 113-118. DOI: 10.11988/ckyyb.20180968

ROCKSOIL ENGINEERING

Influence of Sedimentary Direction on Mechanical Characteristic of Saturated Dense Sand

LUO Qiang¹, TANG Zhen², MA Ke-shuan¹, WANG Kui-yang¹

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Abstract

The influence of sedimentary direction on the strength and volumetric change of dense sand was examined via series of triaxial conslidated drained shear test. Dense sand specimens with different sedimentary directions were prepared based on the capillary effect of sand. Test results revealed that sedimentary direction had obvious influence on the ultimate peak strength and volumetric deformation of sand when the direction changed between 0°~90°. When the sedimentary direction was close to the failure plane direction which is suggested as (45°+_φ/2), the shear band of sample developed earlier, leading to easier failure with lower peak strength and earlier residual stage. Furthermore, a fitting formula reflecting the relation between sedimentary direction and peak strength is put forward. The formula-predicted result well coincided with test result under different confining pressures. Studying the influence of sedimentary direction on strength is of importance to the research of initial anisotropy of sand.

Key words

sand / capillary effect / sedimentary direction / consolidated undrained / shear test / peak strength

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LUO Qiang, TANG Zhen, MA Ke-shuan, WANG Kui-yang. Influence of Sedimentary Direction on Mechanical Characteristic of Saturated Dense Sand[J]. Journal of Changjiang River Scientific Research Institute. 2020, 37(1): 113-118 https://doi.org/10.11988/ckyyb.20180968

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