硫酸盐渍土纯盐胀期盐胀关系式的建立

硫酸盐渍土广泛分布在我国西北地区,盐渍土盐胀对修筑在该地区大量的道路工程构成了危害,研究其盐胀规律对治理盐胀病害具有重要意义。在考虑硫酸盐渍土路基变形的温度区间划分为3个阶段的基础上,通过对新疆玛纳斯地区硫酸盐渍土作一系列假定,建立了纯盐胀期盐胀率?与初始含水率θ1、土体原始孔隙率n和降温前后溶解度r1,r2之间的盐胀关系式。利用自行研制的恒温冷浴土壤试验系统验证了关系式的合理性。

Deduction of salt expansion expression during pure salt expansion period of sulphate saline soil

Sulphate saline soil is widely distributed in the northwest of China.Salt expansion is harmful to the highways in the saline soil area.Studies on the laws of salt expansion were of great significance for harnessing the salt expansion diseases.Considering that the temperature interval of the deformation of sulphate saline soil subgrade was divided into three stages,an equation showing the relationship among salt expansion ratio ?,initial moisture content θ1,initial voids ratio n and solubility r1 and r2 in the course of the pure salt expansion of the sulphate saline soil was established on the basis of a series of hypotheses.The rationality of the salt expansion equation was confirmed by the test system of soil under controlled temperature.