单因素对粗粒盐渍土的盐胀规律影响效果研究

发布时间：2018-04-30 19:35

  本文选题：道路工程 + 粗粒盐渍土　； 参考：《水利学报》2015年S1期

【摘要】：基于过5 mm筛法的易溶盐含量配制方法,首先针对粗粒硫酸盐渍土、粗粒氯盐渍土开展温度改变下的盐胀规律试验;其次针对粗粒硫酸盐渍土、粗粒亚硫酸盐渍土开展盐分、土类、水及上覆荷载等条件改变下的盐胀规律研究,结果表明:粗粒盐渍土的盐胀起胀温度与降温持续时间、含盐量、初始密度正相关,与含水率和附加荷载负相关;氯离子可降低粗粒盐渍土的起胀温度,对其盐胀量具有抑制作用;盐胀敏感温度区间,粗粒硫酸盐渍土为-5℃~-10℃,粗粒亚硫酸盐渍土为-10℃~-15℃;粗粒硫酸盐渍土的起胀含盐量约0.3%,粗粒亚硫酸盐渍土的起胀含盐量约0.5%;粗粒硫酸(亚硫酸)盐渍土的容许含盐量值基本在2%左右。
[Abstract]:Based on the method of preparing soluble salt content over 5 mm sieve, the salt expansion law of coarse sulphate saline soil was first tested under the change of temperature, and the salt content of coarse sulfite soil was studied. The results show that the salt swelling temperature of coarse saline soil is positively correlated with the duration of cooling, salt content, initial density, and negative correlation with water content and additional load. Chlorine ion can reduce the swelling temperature of coarse saline soil and inhibit its salt swelling, the sensitive temperature range of salt expansion is -5 鈩，

本文编号：1825892