带大跨度原生裂隙膨胀土强度性能多尺度计算方法

Multiscale computation method for stiffness of expansive soil with large span of primary fissure

为了研究膨胀土中大跨度原生裂隙对膨胀土强度性能的影响,以南阳膨胀土为研究对象,进行了原生裂隙的统!计工作。在此基础上利用计算机反演生成裂隙,得到了带原生裂隙的膨胀土试件。并采用带裂隙膨胀土多尺度刚度参数计算方法,研究了大跨度原生裂隙对膨胀土强度性能的影响。研究结果表明,随着裂隙的逐渐引入,膨胀土粘聚力及内摩擦角都逐渐向裂隙土靠近,抵抗变形能力不断下降。

In order to study the effect of large span primary fissures on the strength of expansive soil, the statistical work of primary fissures was carried out with Nanyang expansive soil as the object of study. The fractures were generated by eomputer inversion. The effeets of large-span primary fissures on the strength properties of expansive soils were studied by means of multi-scale stiffness parameters calculation of fractured expansive soils. The results show that the ability of resisting deformation is declining with the gradual intro- duction of expansive soil eohesion and internal friction angle.