CAJ | 학술논문

采用滤纸法和压力板法测定不同含盐量盐渍土的土-水特征曲线(SWCC),探讨土中含盐量对盐渍土土-水特征曲线的影响.试验结果表明,粉土中含盐量对基质吸力土-水特征曲线的影响不大.采用滤纸法测得的总吸力与基质吸力之间的差值随着土中盐溶液浓度的增加而增加,且该差值要大于相同浓度纯盐溶液的渗透吸力,其原因是由于土颗粒表面对溶液吸附作用引起的,用滤纸法测得的基质吸力土-水特征曲线处于脱湿曲线和吸湿曲线之间.采用蒸汽平衡法测定Whatman 42号滤纸在高吸力阶段的总吸力的率定曲线,使得高吸力时用滤纸法测定吸力更为精确.
채용려지법화압력판법측정불동함염량염지토적토-수특정곡선(SWCC),탐토토중함염량대염지토토-수특정곡선적영향.시험결과표명,분토중함염량대기질흡력토-수특정곡선적영향불대.채용려지법측득적총흡력여기질흡력지간적차치수착토중염용액농도적증가이증가,차해차치요대우상동농도순염용액적삼투흡력,기원인시유우토과립표면대용액흡부작용인기적,용려지법측득적기질흡력토-수특정곡선처우탈습곡선화흡습곡선지간.채용증기평형법측정Whatman 42호려지재고흡력계단적총흡력적솔정곡선,사득고흡력시용려지법측정흡력경위정학.
Soil-water characteristic curves (SWCCs) of saline silt with different salt contents were measured by the filter paper and pressure plate methods. The influence of salt contents on the SWCCs was discussed. It was concluded from the experimental results that the variation in salt content in silt has little effect on matric suction;the difference between total and matric suctions measured by the filter paper increases with increasing salt content;and the difference is greater than osmotic suction of the pure saline solution with the same salt concentration due to the adsorption of the surface of soil grains to the solution;and the matric SWCC measured by the filter paper method is between the drying curve and the wetting curve. The calibration curve of Whatman No.42 filter paper was measured by the vapor equilibrium method for total suction at the high suction range;and thus the measured accuracy of total suction is improved at that range.