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Experimental Study on the Shear Strength of Fine Sand Reinforced by Grouting and Freezing

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Abstract

In order to investigate the shear strength of fine sand reinforced by grouting and freezing method, a series of direct shear tests was carried out in a temperature-adjusted wall-in refrigerator. Four different soil samples were prepared including non-grouted unfrozen sample (NU), grouted unfrozen sample (GU), non-grouted frozen sample (NF), and grouted frozen sample (GF) considering different factors of moisture content, water–cement ratio, freezing temperature, and curing time. The linear Mohr–Coulomb strength envelope was adopted to describe the relationship between shear strength and vertical pressure of fine sand. The function of freezing and grouting was validated, and the main results show that the shear strength of unfrozen sample decreases with increasing moisture content; in terms of frozen sample, the shear strength increases with moisture content and decreasing freezing temperature; a greater water–cement ratio always produces larger shear strength of GF sample which also increases with curing time as expected; however, the strength of GU sample experiences an opposite trend in water–cement ratio; the effect of different factors on the cohesion c and internal friction angle φ was also discussed and analyzed with many proposed non-linear models.

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Acknowledgments

This project is supported by the National Natural Science Foundation of China (No. 41371081), the National 973 Project of China (No. 2012CB026104), and the National Natural Science Foundation of China (No. 51378057).

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Correspondence to Jiankun Liu.

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We certify that this manuscript is original and has not been published and will not be submitted elsewhere for publication while being considered by Transportation Infrastructure Geotechnology. And, the study is not split up into several parts to increase the quantity of submissions and submitted to various journals or to one journal over time. No data have been fabricated or manipulated (including images) to support the conclusions. No data, text, or theories by others are presented as if they were our own.

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We declare that we have no conflict of interest.

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent was obtained from all individual participants included in the study.

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Liu, J., Yu, X., Wang, P. et al. Experimental Study on the Shear Strength of Fine Sand Reinforced by Grouting and Freezing. Transp. Infrastruct. Geotech. 3, 21–35 (2016). https://doi.org/10.1007/s40515-015-0027-6

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  • DOI: https://doi.org/10.1007/s40515-015-0027-6

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