加筋率和含水率对木纤维红黏土边坡稳定性的影响

为了研究木纤维在不同含水率下对红黏土边坡稳定性的影响，采用直剪试验和边坡稳定性模拟分析方法，对加筋率为0（素土）、0.5%、2.5%和5.0%共4个处理在5个不同含水率水平下的木纤维加筋红黏土试样测定土体黏聚力和内摩擦角，分析边坡土体的最小安全系数。结果表明:加筋率越高，土体内摩擦角越小，黏聚力越大，木纤维主要以提高黏聚力来增强土体稳定性；木纤维红黏土在含水率＜25%时，木纤维能增强抗剪强度，提高边坡最小安全系数，且加筋率越高，抗剪强度和最小安全系数越大，边坡稳定性越好。 

Influence of Wood Fiber Reinforcement Ratio and Moisture Content on Stability of Red Clay Slope

In order to study influence of wood fiber on stability of red clay slope under different moisture content，direct shear test and slope stability simulation analysis method were used，cohesion and internal friction angle of wood fiber reinforced red clay samples with four reinforcement ratios of 0（plain soil），0.5%，2.5% and 5.0% under five different water content levels were measured，and the minimum safety factor of slope soil was analyzed.Results showed that:the higher the reinforcement rate，the smaller the friction angle in the soil body and the greater the cohesion.Wood fiber mainly enhanced soil stability by increasing cohesion.When moisture content of wood fiber red clay was less than 25%，wood fiber could enhance shear strength and increase minimum safety factor of the slope，and the higher the reinforcement ratio，the greater the shear strength and minimum safety factor，and the better the slope stability.