【摘要】 为探究花岗岩风化形成的风化球孤石对边坡稳定性及破坏特征的影响,利用摄影测量和数字图像处理技术,对大量的孤石进行拍照及处理,建立大量具有各种形状的孤石模型,从所建立的孤石模型中选取具有不同形状参数的孤石,将其导入ABAQUS软件,建立含有孤石的边坡模型,进行有限元强度折减分析。结果表明:孤石的位置和大小会对边坡的安全系数产生规律性影响,而孤石的形状对边坡安全系数的影响表现出不确定性;孤石对边坡破坏特征产生影响,塑性应变区发展过程及位移场分布在孤石处与均质边坡相比均有较大变化。更多还原

【Abstract】 In order to explore the influence of weathered spheroidal solitary stone formed by granite weathering on the slope stability and failure characteristics, the photogrammetry and digital image processing techniques were used to photograph and process a large number of solitary stone, and a large number of models for the solitary stone with various shapes were established.The solitary stone with various shape parameters were selected from the established solitary stone models, and imported into the ABAQUS software to establish the slope model containing solitary stone, then the reduction analysis on finite element strength was conducted.The results showed that the position and size of the solitary stone had the regular influence on the safety factor of slope, while the shape of solitary stone had the uncertain influence on the safety factor of slope.The solitary stone had influence on the failure characteristics of slope, and both the development process of plastic strain zone and the distribution of displacement field at the position of solitary stone had great changes compared with the homogeneous slope.更多还原