CAJ | 학술논문

随着各种复杂黄土湿陷问题的呈现，不断有新的地基处理方法得到推广应用，硅化法是主要化学方法之一。为了探究温度改性水玻璃固化黄土在冻融环境下的加固效果，对其进行了冻融特性试验研究。通过控制不同温度的水玻璃溶液配制黄土试样，研究其经过冻融循环的无侧限抗压强度、质量损失以及微观结构的变化特征，分析温度改性水玻璃对加固黄土工程特性的影响和冻融循环对试样的破坏作用机理。试验结果表明：固化黄土试样随着冻融循环次数的增加，质量损失率增加；冻融循环次数相同时，质量损失率随着改性温度的增加而减小；固化黄土样的无侧限抗压强度在冻融初期存在补强作用，以后随着冻融循环次数的增加而减小；改性温度越高，20°Bé水玻璃固化黄土样的冻融循环次数相对值越大。
수착각충복잡황토습함문제적정현，불단유신적지기처리방법득도추엄응용，규화법시주요화학방법지일。위료탐구온도개성수파리고화황토재동융배경하적가고효과，대기진행료동융특성시험연구。통과공제불동온도적수파리용액배제황토시양，연구기경과동융순배적무측한항압강도、질량손실이급미관결구적변화특정，분석온도개성수파리대가고황토공정특성적영향화동융순배대시양적파배작용궤리。시험결과표명：고화황토시양수착동융순배차수적증가，질량손실솔증가；동융순배차수상동시，질량손실솔수착개성온도적증가이감소；고화황토양적무측한항압강도재동융초기존재보강작용，이후수착동융순배차수적증가이감소；개성온도월고，20°Bé수파리고화황토양적동융순배차수상대치월대。
With the emergence of various kinds of complicated loess collapsibility problems,many new foundation treatment methods are applied and popularized.One example is the chemical silicification method.This paper is to explore the strengthening effect of loess solidified with temperature-modified sodium silicate under freeze-thaw cycles.Experimental tests are carried out for the peculiarity of loess under freeze-thaw cycles.They study changes of loess samples in unconfined compressive strength,mass loss and microstructure under freeze-thaw cycles using different temperatures of sodium silicate solution to compound loess samples.The paper discusses the effect of temperature-modified sodium silicate on strengthening loess and the destruction mechanism of freeze-thaw cycles to loess samples.The tests show that firstly,the rate of mass loss in loess samples increase with the freeze-thaw cycles. Secondly,If the freeze-thaw cycle index is the same,the mass loss rate decreases with the increase of modification temperature.Thirdly,at the beginning of freeze-thaw period,the unconfined compressive strength of the solidified loess samples increases.And afterwards,it decreases with the increase of freeze-thaw cycle index.Finally,the relative value of freeze-thaw cycles in loess samples solidified by 20°Bésodium silicate increases with the increase of the modified temperature.