CAJ | 학술논문

为了摸清硫酸盐渍土在降温过程中产生冰晶和引起盐胀的剧烈反应期内的体积变化规律，假定土体中芒硝与冰晶独立存在，并认为土体体积变化由三部分体积增加和三部分体积减少引起，根据溶质守恒定律，推求了考虑盐胀和冻胀综合影响下硫酸盐渍土的体积变化关系式，发现剧烈反应期内土体体积变化主要由原始孔隙率n、降温前后未冻水体积含量θu1和θu2与降温前后的硫酸钠溶解度r1和r2所决定。利用自行研制的恒温冷浴土壤试验系统，观测了人工掺配硫酸盐渍土在降温过程中的体积变化；采用冻结温度试验确定了土样冻结过程中的未冻水含量，并引入未结晶水含量的概念，计算了土样降温过程中的累计盐（冻）胀率，通过分析比较土样体积变化率实测值和计算值，验证了关系式的合理性和适用性。
위료모청류산염지토재강온과정중산생빙정화인기염창적극렬반응기내적체적변화규률，가정토체중망초여빙정독립존재，병인위토체체적변화유삼부분체적증가화삼부분체적감소인기，근거용질수항정률，추구료고필염창화동창종합영향하류산염지토적체적변화관계식，발현극렬반응기내토체체적변화주요유원시공극솔n、강온전후미동수체적함량θu1화θu2여강온전후적류산납용해도r1화r2소결정。이용자행연제적항온랭욕토양시험계통，관측료인공참배류산염지토재강온과정중적체적변화；채용동결온도시험학정료토양동결과정중적미동수함량，병인입미결정수함량적개념，계산료토양강온과정중적루계염（동）창솔，통과분석비교토양체적변화솔실측치화계산치，험증료관계식적합이성화괄용성。
In order to clearly comprehend the volume change law of sulphate saline soil in the intense reaction period of producing ice crystals and causing salt expansion, assuming that the ice crystals and the mirabilite in the soil exist independently and the volume change of soil is composed of three increased parts and three reduced parts, and based on the law of conservation of solute, an expression for the volume change of sulphate saline soil considering salt expansion and frost heave is proposed. It is found that the expression for the volume change in the intense reaction period is largely decided by the initial void ration, unfrozen water contentθu1 andθu2 before and after being cooled, and solubilityr1 and r2 before and after being cooled. The volume of artificial sulphate saline soil samples is investigated using the test system of soil under controlled temperature. The unfrozen water content in the process of freezing is determined by the freezing temperature tests, and the concept of no precipitated water content (NPWC) is given, and the cumulative volume change rate of soil samples during being cooled is calculated. The rationality and applicability of the proposed expression is verified through analysis and comparison between the measured and calculated volume change rates of soil samples.