应力作用下非饱和重塑黏土土水特征曲线研究 |
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引用本文: | 宋亚亚,卢廷浩,季李通. 应力作用下非饱和重塑黏土土水特征曲线研究[J]. 水利与建筑工程学报, 2016, 0(2): 185-188. DOI: 10.3969/j.issn.1672-1144.2016.02.037 |
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作者姓名: | 宋亚亚 卢廷浩 季李通 |
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作者单位: | 1. 广东天信电力工程检测有限公司,广东广州,510663;2. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098; 河海大学岩土工程研究所,江苏南京210098;3. 南京泰克奥科技有限公司,江苏南京,210017 |
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摘 要: | 利用最新研制的全自动非饱和土固结仪,研究了竖向应力对非饱和重塑黏土土水特征曲线的影响,并采用FX模型,通过最小二乘法对试验结果进行拟合。结果表明,竖向应力越大,试样的空气进入值越大,曲线越平缓,水越难排出,相同吸力下含水率越高。FX模型可以较好的描述本次试验各组试样的土水特征曲线。通过分析拟合参数,提出一个只与竖向应力有关的土水特征曲线经验公式。
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关 键 词: | 非饱和土 土水特征曲线 竖向应力 经验公式 |
Experimental Study of Stress State-dependent SWCC of Remolded Unsaturated Clay |
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Abstract: | Automatic instruments of unsaturated soil consolidation were used to analyze the influences of vertical stress on SWCC of remolded unsaturated clay .Through least-square method ,FX model was chosen to fit the test data .The re-sults show that the higher the vertical stress ,the flatter the curve with higher air entry value and higher water content un-der the same suction .Through the fit results of SWCC ,it was found that FX model can reflect the ability of water-retain-ment of clay in this study well .Besides ,An empirical formula of SWCC only related with vertical stress has been pro-posed . |
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Keywords: | unsaturated soil soil-water characteristic cure vertical stress empirical formula |
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