大连滨海粉质黏土剪切力学特性环剪试验

doi:10.13278/j.cnki.jjuese.201605203

Abstract

Abstract:

The change of the shear mechanics properties of typical silty clay in Dalian Binhai area was tested at different normal stresses and shear rates by ring shear apparatus.Test results indicate that: 1) strain-softening phenomenon of silty clay was observed in normal consolidation state. It was shown that strain softening feature is mainly related to the mass fraction and directionality of clay mineral in the soil in the process of shearing.2)At the same shear rate, the peak strength and residual strength increase with the increase of normal stresses, and showed a good linear relationship between normal stress and peak intensity.3)Due to internal cohesive force of soil changes in the process of peak intensity, the peak intensity increases with the increase of shear rate;the residual strength and shear rate have certain correlation, which has a relationship with shear zone (surface) of clay grain orientation arrangement at different levels under different shear rates.

Key words: silty clay, ring shear test, strain softening, peak strength, residual strength, shear displacement

CLC Number:

P642.114

Hong Yong, Yue Yuqiu, Zheng Xiaoyu, Che Xiaowen, Liu Peng. Shear Strength of Silty Clay in Dalian by Ring Shear Tests[J].Journal of Jilin University(Earth Science Edition), 2016, 46(5): 1475-1481.

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