CAJ | 학술논문

为了研究黄土脆性破坏规律,利用直剪仪对兰州原状Q2黄土进行了不同含水量、不同剪切速率和不同法向压力下直接剪切试验.结果表明同一法向压力下黄土应力脆性指数随含水量的增大而不断减小,随剪切速率的增大呈先减小后增大的趋势,应力脆性指数与法向压力间的关系符合负指数函数关系.研究成果对于认识黄土结构强度和高速远程黄土滑坡滑动机理等方面均具有一定的借鉴意义.
위료연구황토취성파배규률,이용직전의대란주원상Q2황토진행료불동함수량、불동전절속솔화불동법향압력하직접전절시험.결과표명동일법향압력하황토응력취성지수수함수량적증대이불단감소,수전절속솔적증대정선감소후증대적추세,응력취성지수여법향압력간적관계부합부지수함수관계.연구성과대우인식황토결구강도화고속원정황토활파활동궤리등방면균구유일정적차감의의.
According to direct shear tests of Q2 loess in Lanzhou under varied levels of moisture content, different shear rates and different normal pressures, the law for the brittle failure of loess was studied. The test results show that the stress brittle index of loess under the same normal pressure decreased with the increase of the moisture content; it also decreased with the increase of the shear rate, and then increased. Besides, the relationship between the stress brittle index of loess and the normal pressure accorded with a negative exponential function. References offered in the paper will be useful in further research on the structural strength of loess and the sliding mechanism of remote loess landslide at a high speed.