粒径对土持水性能的影响

doi:10.13722/j.cnki.jrme.2015.0474

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Abstract The water retention of soils with different particle sizes was investigated to analyze the influence of particle size on the soil water characteristic curve(SWCC). The test data were best-fitted using the D. G. Fredlund and A. Xing equations. The obtained fitting parameters and hysteretic behavior were discussed and correlated with grain-size distribution parameters. The results show that the fitting parameter，a，increases linearly with the increasing of the air-entry value of the SWCC and that the fitting parameters，m and n，decrease with the increasing of the residual suction and slope of the SWCC respectively. The coarse-grained soil has the lower air-entry value，residual matric suction and water-entry value and less hysteresis than a fine-grained soil. Moreover，the slope of the drying SWCC increases with the increasing of particle size of soil. The hysteresis decreases with the increasing of particle size together with the slope of the grain size distribution curve of the soils.

Key words： soil mechanics water retention soil-water characteristic curve(SWCC) hysteresis

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	CHEN Yulong
	UCHIMURA Taro

Cite this article:

CHEN Yulong,UCHIMURA Taro. Influence of particle size on water retention of soils[J]. , 2016, 35(7): 1474-1482.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.0474 OR http://www.rockmech.org/EN/Y2016/V35/I7/1474

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