罗布泊地区天然硫酸盐渍土融沉量试验研究

摘要

In order to analyze the influence factors of the thawing settlement amount of natural sulphate saline soil ,on the bases of the survey and research for the Lop Nur's S235 road ,the freeze-thaw tests of natural sulphate saline soil in this area was carried out to simulated the temperature conditions of the natural environment .The results indicate that the quadratic function relationship between the thawing settlement amount of natural sulphate saline soil and freeze-thaw times ;Each cycle's thawing settlement amount will be larger when the soil water content increasing ;The thawing settle-ment amount's sensitivity for the change of the soil water content is stronger than the change of the soil dry density .%为研究该地区硫酸盐渍土融沉量的影响因素,在对罗布泊地区S235公路沿线勘察调研的基础上,通过模拟土体在自然环境下的温度条件变化的方法,对该地区天然硫酸盐渍土进行冻融循环试验研究.试验结果表明:天然硫酸盐渍土的融沉量与冻融循环次数呈二次函数的关系;各周期的融沉量随含水率的增大而增大;融沉量对含水率的变化有较强的敏感性,对干密度的变化敏感度相对较低.