CAJ | 학술논문

通过室内模拟试验的方法,对受两种碱溶液NaOH和NH_2·H_2O质量分数分别为4.5%,9%,13.5%,18%侵蚀的粉土进行了物理力学指标的测定,总结了各项指标与侵蚀介质的类型、含量之间的变化规律:污染后土样的基本物理性质和压缩性都发生了变化.比较了Na0H和NH_3·H_2O溶液侵蚀下土样的各项指标,NaOH对于土样的影响要强于NH_3·H_2O.通过微观分析表明,孔隙面积占图像总面积的比例在中孔时达到峰值,并以中孔为分界值,前半段曲线呈升高趋势,后半段呈降低趋势;同等条件下NH_3·H_2O污染土较Na0H污染土具有更多的颗粒内孔隙;最后结合土体的物理力学性质和微观结构研究结果,阐述引起土性发生改变的原因,揭示了污染土的侵蚀机理.
통과실내모의시험적방법,대수량충감용액NaOH화NH_2·H_2O질량분수분별위4.5%,9%,13.5%,18%침식적분토진행료물리역학지표적측정,총결료각항지표여침식개질적류형、함량지간적변화규률:오염후토양적기본물이성질화압축성도발생료변화.비교료Na0H화NH_3·H_2O용액침식하토양적각항지표,NaOH대우토양적영향요강우NH_3·H_2O.통과미관분석표명,공극면적점도상총면적적비례재중공시체도봉치,병이중공위분계치,전반단곡선정승고추세,후반단정강저추세;동등조건하NH_3·H_2O오염토교Na0H오염토구유경다적과립내공극;최후결합토체적물리역학성질화미관결구연구결과,천술인기토성발생개변적원인,게시료오염토적침식궤리.
The study on the physical and mechanical properties of soil polluted by two types of alkaline solutions (NaOH and NH_3·H_2O) with different concentrations (4.5%, 9%, 13.5%, 18%) was conducted through the indoor simulation tests, the law between physical and mechanical properties and solutions was analyzed and summarized: basic physical properties and compressibility properties of polluted soil were changed after erosion,and the comparison of the soil samples eroded by NaOH and NH_3·H_2O reveals that the former had greater impact on soil than the latter one. The micro-structural analysis results show that;middle-pore area had the greatest percentage of the total area, and as a dividing line, the first half of the curve had an increasing trend, the second half was decreased for polluted soil, under the same concentration, NH_3·H_2O-polluted soil had more porosity than NaOH-polluted soil. At last, with the combination of soil physical and mechanical properties and micro-structure study, the cause of for changes in soil was discussed, erosion mechanics was disclosed.