石膏改良碱化土壤的效果(Ⅰ)——石膏与土全部混匀的土柱系列

The Effect of Gypsum on Improving Basified Soil(Ⅰ)——Soil column made by completely mixing gypsum with soil

取不同深度的碱化土与定量石膏全部混匀制成土柱,通过分析石膏的溶解、发生改良作用的效率等,以研究石膏对碱化土的改良作用。结果表明:各处理对石膏的利用很充分,石膏的溶解量大、转化量大、改良碱化土壤的效率高、经过改良后土壤的碱化率低。但是存在的问题一是计划改良层存在石膏的渗漏问题,二是滤液下渗过快,改良反应速度小于下渗速度。二者都不利于改良反应的进行,因此理论上须采用较深的计划改良层。

Gypsum-soil mixed columns were made by gypsum and ration basified soil from different depths,in order to study the effect of gypsumon on improving basified soil,by analysis of gypsum solvency and the efficiency of improvement.The results are as follows: complete mixing qualified gypsum with soil was found to be more sufficient of gypsum,and the greater the gypsum solvency and transformation,the higher the efficiency of improving basified soil and the lower the basified rate of the improved soil.But there are two problems.One is that there are leakage in the planned improvement layer.The other is that filtrate exuded so quickly and this resulted in the fact that reaction velocity is less than exudation velocity,which is not good for the improving process.So it is important to confirm the depth of the improvement layer.