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针对输电线路掏挖基础上拔过程中基础底板周围土体的大变形问题,基于有限元软件ABAQUS建立了基础与周围均质地基土体共同作用体系的弹塑性有限元数值分析模型,采用ALE法通过变参数计算分析了土性参数、基础埋深与扩大头直径比(H/D)及基础与土接触条件对破坏模式和极限上拔承载力的影响。结果表明,该方法能准确计算和预测输电线路掏挖基础抗拔承载力的实际情况。
Aiming at the large deformation of soils around the foundation floor during the digging process of transmission line, an elasto-plastic finite element numerical model for the interaction of foundation and surrounding homogeneous soils is established based on finite element software ABAQUS. The ALE method The influence of soil parameters, base depth and enlarged head diameter ratio (H / D) and the contact conditions between foundation and soil on the failure mode and ultimate pullout capacity were analyzed by variable parameters. The results show that this method can accurately calculate and predict the actual situation of the uplift resistance of excavation foundation of transmission line.