CAJ | 학술논문

为了研究盐分浸析对我国海相沉积黏土劣化性状的影响，分别采用NaCl溶液和蒸馏水来改变温州黏土和连云港黏土孔隙水溶液盐分浓度．测定土体的界限含水率、活性指数等物理指标，分析我国海相沉积黏土物理性状随孔隙水溶液盐分浓度的变化规律．研究结果表明，土体液限和活性指数随着孔隙水溶液盐分浓度的降低而减小，塑限几乎不变，液性指数增加．物理性质随孔隙水溶液盐分浓度的变化曲线存在一阀值浓度4．1 g／L；当孔隙水溶液盐分浓度小于4．1 g／L时，液限和活性指数急剧减小，且液限减小率为1．6～2．3，液性指数大于1．0；当孔隙水溶液盐分浓度大于4．1 g／L时，液限减小率显著降低，仅为0．2～0．8．
위료연구염분침석대아국해상침적점토열화성상적영향，분별채용NaCl용액화증류수래개변온주점토화련운항점토공극수용액염분농도．측정토체적계한함수솔、활성지수등물리지표，분석아국해상침적점토물이성상수공극수용액염분농도적변화규률．연구결과표명，토체액한화활성지수수착공극수용액염분농도적강저이감소，소한궤호불변，액성지수증가．물이성질수공극수용액염분농도적변화곡선존재일벌치농도4．1 g／L；당공극수용액염분농도소우4．1 g／L시，액한화활성지수급극감소，차액한감소솔위1．6～2．3，액성지수대우1．0；당공극수용액염분농도대우4．1 g／L시，액한감소솔현저강저，부위0．2～0．8．
To investigate the effects of salt leaching on the degradation of natural sedimented marine clay’s properties in China, the pore salt concentrations of Wenzhou clay and Lianyungang clay were changed by using NaCl solution and distilled water respectively.The physical indexes such as Atter-berg limits, activity and so on were measured to study the variation rules of the physical properties of marine clays affected by salt leaching.The results show that the liquid limit and activity decrease and the liquidity index increases with the decrease of the pore salt concentration, while the plastic limit is almost unchanged.The variation curves of the physical properties during salt leaching indicate a threshold concentration 4.1 g/L.When the pore salt concentration is lower than 4.1 g/L, the liquid limit and the activity index decreases drastically.The decreasing rate of the liquid limit is 1.6 to 2.3, and the liquidity index is larger than 1.0.When the pore water salinity is larger than 4.1 g/L, the decreasing rate of the liquid limit decreases to 0.2 to 0.8.