CAJ | 학술논문

利用非饱和土固结仪对原状非饱和黄土进行常含水率固结试验，试验中分别选用3种不同干密度、6种不同含水率试样，分析天然干密度和竖向应力对原状非饱和黄土土水特征的影响。试验表明，原状非饱和黄土的吸力随着试样含水率的增大而降低，干密度对土水特征曲线有不可忽视的影响。同一含水率下，原状非饱和黄土的吸力随着天然干密度的增大而增大；提出吸力临界荷载的概念，干密度相同时，吸力临界荷载随着含水率的增大而降低；含水率相同时，吸力临界荷载随着干密度的增大而增大。含水率一定时，竖向荷载引起的干密度变化与初始干密度变化对吸力的影响是不相同的；竖向应力对土水特征曲线影响较小，可以用无荷载条件下的土水特征曲线来描述其吸力状态。最后，提出原状非饱和黄土土水特征曲线函数经验表达式。
이용비포화토고결의대원상비포화황토진행상함수솔고결시험，시험중분별선용3충불동간밀도、6충불동함수솔시양，분석천연간밀도화수향응력대원상비포화황토토수특정적영향。시험표명，원상비포화황토적흡력수착시양함수솔적증대이강저，간밀도대토수특정곡선유불가홀시적영향。동일함수솔하，원상비포화황토적흡력수착천연간밀도적증대이증대；제출흡력림계하재적개념，간밀도상동시，흡력림계하재수착함수솔적증대이강저；함수솔상동시，흡력림계하재수착간밀도적증대이증대。함수솔일정시，수향하재인기적간밀도변화여초시간밀도변화대흡력적영향시불상동적；수향응력대토수특정곡선영향교소，가이용무하재조건하적토수특정곡선래묘술기흡력상태。최후，제출원상비포화황토토수특정곡선함수경험표체식。
Experimental research on intact unsaturated loess under three different natural dry densities and six different water contents is conducted by using unsaturated soil consolidation apparatus,and the effects of natural dry density and vertical stress on soil-water characteristics are analyzed. The test results show that the initial matric suction of the intact unsaturated loess water content,and the dry density has an considerable effect on soil-water characteristics. A concept of critical load of suction is proposed. Under the same dry density of the intact unsaturated loess,the critical load of suction decreases with the increasing water content. Under the same water content of the intact unsaturated loess,the critical load of suction increases with the increasing natural dry density. Under the fixed water content,the change of dry density induced by the vertical load has different effects on the suction from the change of the initial dry density. The vertical stress has little effect on soil-water characteristic curves,so the suction situation could be described by using soil-water characteristic curves under zero-load condition. Finally,the function of fitted soil-water characteristic curves is established.