基于土水特征试验估算重塑黏性土的缩限

doi:10.13722/j.cnki.jrme.2021.1013

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Abstract It is difficult to estimate the accurate value of the shrinkage limit by conventional methods(i.e.，calculation method and graphic method) when the residual shrinkage stage of SSCC cannot be negligible. The soil-water characteristic curve(SWCC) and the soil shrinkage characteristic curve(SSCC) are applied to explore the method of determining the shrinkage limit of remolded clay in the present study. The results show that a simple method for correctly estimating the shrinkage limit of remolded clay is proposed based on the idea of combining numbers and shapes. This method does not require a complete shrinkage curve，but only requires two main parameters，namely the water content corresponding to the air entry value and the volume change when the sample is completely dried. The accuracy and applicability of the proposed method are verified by using experimental data from both laboratory and literature available. When the residual shrinkage phase of SSCC can be neglected，the shrinkage limit formula deduced in this study is essentially consistent with the specification，but the former is simpler and has a clear physical meaning. Combined with conventional SWCC experimental data，the formula can also be employed to predict the SSCC of remolded clay and its SWCC based on degree of saturation. The predicted curve is in good agreement with the experimental data. These findings are very important for the subgrade deformation calculation of cohesive soil，as well as the identification of the expansion and shrinkage grade of expansive soil.

Key words： soil mechanics cohesive soil soil-water characteristic curve soil shrinkage characteristic curve shrinkage limit deformation

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	Articles by authors
	YE Yunxue1
	2
	3
	HAN Zhong2
	ZOU Weilie2
	WANG Dongxing2
	WU Junhua1
	3

Cite this article:

YE Yunxue1,2,3, et al. Estimating the shrinkage limit of remolded cohesive soil based on soil-water characteristics[J]. , 2022, 41(S2): 3380-3389.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1013 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS2/3380

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