Collapsibility Characteristics of Wind-Blown Sand in Thar Desert, Pakistan

YAO Chen-hui; XIA Yu-yun; WU Xue-lin; LIU Yi; CHEN Tie-fei; MEN Qing-bo

doi:10.11988/ckyyb.20200202

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Journal of Changjiang River Scientific Research Institute ›› 2021, Vol. 38 ›› Issue (5) : 131-136. DOI: 10.11988/ckyyb.20200202

ROCK-SOIL ENGINEERING

Collapsibility Characteristics of Wind-Blown Sand in Thar Desert, Pakistan

YAO Chen-hui^1,2, XIA Yu-yun^1,2, WU Xue-lin^1,2, LIU Yi^1,2, CHEN Tie-fei^1,2, MEN Qing-bo^1,2

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Abstract

The collapsibility characteristics of wind-blown sand in Thar Desert of Pakistan are investigated based on preliminary survey findings and collapsibility test results. The correlation between basic physical indexes of wind-blown sand and collapsibility are also examined. Results demonstrate that the collapsibility of wind-blown sand is mainly distributed in layer ① and layer ②, and the average collapsibility coefficient is 0.039, indicating slightly to moderately collapsible. The grain composition and soluble salt characteristics of wind-blown sand are the main internal basis of collapsible deformation. In addition, strong dispersion is found between collapsibility coefficient and water content of the wind-blown sand. Collapsibility coefficient is also positively correlated with porosity and linearly negatively with dry density. When porosity is smaller than 0.65 or dry density exceeds 1.60 g/cm³, wind-blown sand is not collapsible.

Key words

Thar desert / wind-blown sand / collapsibility / physical indexes / correlation

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YAO Chen-hui, XIA Yu-yun, WU Xue-lin, LIU Yi, CHEN Tie-fei, MEN Qing-bo. Collapsibility Characteristics of Wind-Blown Sand in Thar Desert, Pakistan[J]. Journal of Changjiang River Scientific Research Institute. 2021, 38(5): 131-136 https://doi.org/10.11988/ckyyb.20200202

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