CAJ | 학술논문

在季节性冻土区，温度的周期性变化会引起土体冻结和融化。在土体冻结过程中，土中的水分发生迁移，水中的盐分也发生变化，对土体的性质产生一定影响，土的分散性发生变化。选取吉林西部镇赉地区黏性土，利用室内试验模拟土体在冻融作用下的水分迁移过程，结合分散性鉴定试验，对冻结前后土样的含水量、含盐量、土粒的微观结构以及分散性的对比研究，分析季节性冻土区水分迁移对黏土分散性产生影响的主要因素。研究表明，研究区土样属分散性盐渍土，在冻结过程中土中水分及盐分向上迁移，土的结构变得更松散，冻融作用后土的分散性显著增强。
재계절성동토구，온도적주기성변화회인기토체동결화융화。재토체동결과정중，토중적수분발생천이，수중적염분야발생변화，대토체적성질산생일정영향，토적분산성발생변화。선취길림서부진뢰지구점성토，이용실내시험모의토체재동융작용하적수분천이과정，결합분산성감정시험，대동결전후토양적함수량、함염량、토립적미관결구이급분산성적대비연구，분석계절성동토구수분천이대점토분산성산생영향적주요인소。연구표명，연구구토양속분산성염지토，재동결과정중토중수분급염분향상천이，토적결구변득경송산，동융작용후토적분산성현저증강。
Periodical change of temperature in seasonal frozen region will cause freezing and thawing process of soil.The migration of water and salt in soil will take place during freezing process , which can cause a series variation of soil character including the dispersibility of soil .This research aims to investigate the cohesive soil collected from Zhenlai area of werstern Jilin , indoor freezing-thawing test were taken to simulate the moisture migration process , and physicochemical properties and dipersibility of soil were tested .The water content , salt content , microstructure was tested before and after the freezing-thawing process , combining the dispersibility qualification tests , the influences of dispersibility of cohesive soil were studied .The results show that the soil taken from research area is dispersive saline soil , the water and salt migrate upward during the freezing process , and soil structures turn into looser after freezing-thawing process , which enhance the dispersibility obviously of soil .