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对某板岩粗粒料进行了大型三轴湿化变形试验,分析了湿化体积应变、湿化剪应变等随围压、应力水平变化关系。试验结果表明:湿化体积应变、湿化剪应变随着围压增大或应力水平的提高而增大。利用试验结果研究了沈珠江湿化变形模型对试验所用的板岩粗粒料的适用性。结果显示,沈珠江模型不能满意地反映湿化体积应变,但是,能较好地反映湿化剪应变与应力状态的关系。分析湿化后剪切强度性质,发现不同应力水平下湿化对粗粒土的强度指标影响很小。
A large-scale triaxial wet deformation test was carried out on a slate coarse aggregate. The relationship between volumetric strain and wetting shear strain with the confining pressure and stress level was analyzed. The experimental results show that the wetting volume strain and wetting shear strain increase with the increase of confining pressure or stress level. The applicability of the Shenzhujiang humidification deformation model to the slate coarse aggregate used in the experiment was studied using the test results. The results show that the model of Shenzhujiang can not satisfactorily reflect the volumetric strain of wetting, but it can well reflect the relationship between the wet strain and the stress state. The analysis of shear strength after wetting shows that wetting at different stress levels has little effect on the strength index of coarse grained soil.