CAJ | 학술논문

饱和黄土的稳态强度(残余强度)是黄土边坡是否发生流滑的关键因素,为了评价饱和黄土的残余强度就需要很好的了解饱和黄土的不排水剪切性能.通过对饱和黄土的固结不排水三轴试验研究了饱和黄土的稳态强度理论.试验研究发现饱和黄土有两种典型的不排水剪切特性:稳态特性、准稳态特性.且大多数情况下饱和黄土总表现为稳态特性,只有疏松的黄土表现出准稳态特性;根据试验结果得出了黄土的稳态线与稳态强度线,可以用来分析黄土边坡的流滑机理.探讨了描述黄土稳态性质的参数内摩擦角和粘聚力的物理含义;比较了由地震引发的滑坡与灌溉诱发的滑坡流滑机理的差异,对于地震引起的黄土滑坡土体残余(稳态)强度起决定性作用,而对于灌溉引起的黄土滑坡土体的峰值强度才是关键因素.
포화황토적은태강도(잔여강도)시황토변파시부발생류활적관건인소,위료평개포화황토적잔여강도취수요흔호적료해포화황토적불배수전절성능.통과대포화황토적고결불배수삼축시험연구료포화황토적은태강도이론.시험연구발현포화황토유량충전형적불배수전절특성:은태특성、준은태특성.차대다수정황하포화황토총표현위은태특성,지유소송적황토표현출준은태특성;근거시험결과득출료황토적은태선여은태강도선,가이용래분석황토변파적류활궤리.탐토료묘술황토은태성질적삼수내마찰각화점취력적물리함의;비교료유지진인발적활파여관개유발적활파류활궤리적차이,대우지진인기적황토활파토체잔여(은태)강도기결정성작용,이대우관개인기적황토활파토체적봉치강도재시관건인소.
The steady state strength (i. e. , residual strength) plays a major role in the flow sliding mechanism of loess landslides. The evaluation of residual strength requires a better understanding of undrained saturated loess behavior. The steady strength of saturated loess is examined using stress-controlled undrained consolidation triaxial test. Two typical stress - strain behaviors of saturated loess are steady state behavior and quasi - steady state. The majority situations exhibit steady state behavior. Only loose loess exhibits quasi -steady state behavior. According to the test results, steady state line and steady state strength line of saturated loess are established. These lines can be used to analyze the mechanism of flow slide. It can use the angle of internal friction and cohesion to describe the steady state behavior of saturated loess. The meaning of these parameters is discussed. The difference of irrigationinduced landslides of loess and seismically - induced landslides of loess is analyzed. If the landslides induced by earthquake, the steady state strength (residual strength) plays a major role. If the landslides induced by irrigation,the peak strength plays a major role.