摘要
为了探讨MK模型在含盐细粒土中的适用性,测试不同掺量的NaCl、Na_2SO_4细粒土的土-水特征曲线.结果表明:MK模型适用于描述含盐细粒土的土-水特征曲线,但基于经验公式的MK预测方程效果并不理想.根据MK模型的拟合参数a_(fit)、m_(fit)建立其与盐溶液浓度之间的相关关系,提出一种适合不同盐溶液饱和条件下细粒土土-水特征曲线的预测方法,预测结果和实测值较吻合,具有一定的适用性,可用于预测含盐细粒土的土-水特征曲线.
In order to evaluate the influence of salinity on the applicability of MK prediction models, desalted fine-grained soil was employed and saturated with NaC1 and Na2SO4 solutions of different concentrations. It was showed that the traditional MK model tends to lose applicability when predicting the soil-water characteristic curve of saline soil. According to the relationship between the parameters a fit, m fit and salt concentration, a new method was presented to estimate the soil-water characteristic curve of fine-grained soil saturated with different salt solutions. This model was tested to estimate the soil-water characteristic curve of different salt contaminated fine-grained soils. The prediction results were in good agreement with measured values, thus confirming the universality of this proposed MK prediction model.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第1期20-25,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家重点基础研究发展计划(973)项目(2014CB744701)
中央高校基本科研业务费专项资金项目(lzujbky-2014-5)
关键词
土-水特征曲线
MK模型
预测
适用性
soil-water characteristic curve
MK model
prediction
applicability
