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为了研究高液限土边坡稳定性各影响因素的敏感性,以分布在广梧高速公路沿线边坡中的高液限土为试样,通过常规直接剪切试验测定了不同含水状态下高液限土的抗剪强度参数,并以此为基础,基于强度折减法计算研究了高液限土边坡的含水率、剪胀角、坡高等7个因素对边坡稳定性安全系数的影响。计算结果表明:高液限土边坡稳定性各影响因素的敏感性,从大到小依次是高液限土边坡的含水率、坡度、坡高,而高液限土边坡的弹性模量、泊松比、剪胀角以及抗拉强度对边坡稳定性的影响不显著;当高液限土边坡的含水率增加到某值时,边坡稳定性安全系数会突然减小,容易引发滑坡;高液限土边坡坡度、坡高与边坡稳定性安全系数的关系曲线,分别呈下降的直线型及微向上凹的抛物线下降型。研究成果为高液限土边坡的设计、施工以及处治提供了理论依据,具有一定的实际意义。
In order to study the sensitivity of various factors influencing the stability of high liquidity soil slopes, high liquid-limited soil distributed along the slope of Guang-Wu Expressway was used as a sample to determine the effects of different water-containing high Based on this, the influence of the factors such as water cut, dilatancy angle and slope height on the safety factor of slope stability was studied based on the strength reduction method . The calculation results show that the sensitivity of each factor influencing the stability of high liquid limit soil slope is, in descending order, the moisture content, slope and slope height of high liquid limit soil slope, while the elastic modulus of high liquid limit soil slope Poisson’s ratio, dilatancy angle and tensile strength have no significant effect on the slope stability. When the moisture content of the high liquid-saturated soil slope increases to a certain value, the safety factor of slope stability suddenly decreases, The landslide prone to be induced; the curves of the slope stability and the slope safety of high liquid-saturated soil slopes show a decreasing parabola type with straight and slightly upward dipping. The research results provide a theoretical basis for the design, construction and treatment of high liquid-saturated soil slopes, and have certain practical significance.