含盐量对滨海盐渍土物理及水理性质的影响

含盐量的增加使滨海盐渍土含水率与含液率间的差值变大,并导致高估土的干密度,低估土的孔隙比和饱和度。物理性质指标换算和颗粒级配分析试验结果表明,从2%的含盐量开始,随含盐量增加,胶粒含量减少,粘粒和粉粒含量增加,但25μm及以上的粒组含量变化不大。2%以内的含盐量对土的稠度指标影响微弱,当含盐量增加到11%时,盐分结晶形成了较多的晶体颗粒,使土的塑性指数明显下降并呈现出区段性。 

Effect of salt content on physical and hydrological properties of saline soil in inshore

With the increasing of salt content of saline soil in inshore,the difference between water content and salt-solution content is remarkable,resulting in the dry density increasing,and the void ratio and degree of saturation decreasing.On the basis of the conversion of physical indexes and the experimental results of particle size analysis,it has been showed that content of clay group and silt group increases,and colloid group decreases with the increasing of salt content,starting from 2% of salt content.And upper groups(≥25 μm) cannot be effected with the increasing of salt content.Starting from 11% with the increasing of salt content,solid particles are formed from salt crystals,causing the plastic index of the soil drop gradually and presenting an appearance of sections.