CAJ | 학술논문

以陕西富平重塑黄土为研究对象，使土样在封闭系统下经历不同次数的冻融循环作用，分析不同次数的冻融循环作用下土体黏聚力的变化规律。试验利用球形模板压入试验测定冻结黄土的相对瞬时强度和长期强度，结果表明，第4次冻融循环后冻结黄土的相对瞬时强度最大，之后在第6次大幅度降低，第8次又大幅度增加，但小于第4次，第10次之后逐渐趋于稳定。冻结黄土的长期强度在冻融循环第8次时最大，第6次和10次强度相近，处于中间水平，第4、50、100次时强度最低。相对瞬时强度的变化和其孔隙比、密度的变化整体上是相互对应的，这种变化规律与冻融过程中的水分迁移有着密切的关系。长期强度与物理性质的关系并不明显，它是土样内部结构、矿物成分以及物理性质的综合反映。
이협서부평중소황토위연구대상，사토양재봉폐계통하경력불동차수적동융순배작용，분석불동차수적동융순배작용하토체점취력적변화규률。시험이용구형모판압입시험측정동결황토적상대순시강도화장기강도，결과표명，제4차동융순배후동결황토적상대순시강도최대，지후재제6차대폭도강저，제8차우대폭도증가，단소우제4차，제10차지후축점추우은정。동결황토적장기강도재동융순배제8차시최대，제6차화10차강도상근，처우중간수평，제4、50、100차시강도최저。상대순시강도적변화화기공극비、밀도적변화정체상시상호대응적，저충변화규률여동융과정중적수분천이유착밀절적관계。장기강도여물이성질적관계병불명현，타시토양내부결구、광물성분이급물이성질적종합반영。
Taking Shaanxi Fuping remolded loess as the object of study, soil samples gone through different numbers of freeze-thaw cycle under a closed system, and variations about mechanical index (cohesion) of soil at the different numbers of freeze-thaw cycle are analyzed. Experiment used spherical template into the determination of relative instantaneous strength and long-term strength of frozen loess. After 4 times, the relative instantaneous strength is the largest, but greatly reduces after 6 times. The relative instantaneous strength significantly increases at the eighth time (but less than the forth time), and gradually becomes stable after 10 times. The largest long-term strength of frozen loess is at the eighth time. The long-term strength at the 6th time and 10th time is similar in the middle level. The lowest relative instantaneous strength is at the 4 th, 50 th and 100 th time. Void ratio and density changes are corresponding to relative instantaneous strength. This kind of change rule has the close relationship with moisture migration in the process of freeze-thaw. The relationship between long-term strength and physical properties is not obvious. It is a synthetical reflection of the internal structure, mineral composition and physical properties.