Abstract Bearing capacity of the unstructured terrain considering the effects of the wheel geometry and soil mechanic properties is analyzed in this paper. Two-dimensional pressure-sinkage simulations are conducted to evaluate the degrees of similarity between the flat plate and wheel in terms of their ultimate bearing characteristics of Terzaghi theory. The results show that these degrees of similarity are mainly reflected in the soil in-depth direction and the corresponding failure behaviors. Based on the approximation of the ultimate bearing capacity between the wheel and flat plate, a piecewise bearing capacity evaluation method with the effects of the soil mechanic properties and three-dimensional wheel geometry is proposed. The pressure-sinkage values of the proposed model show a satisfactory agreement with the experimental ones. The proposed model performs better than the semi-empirical models, as it considers more soil bearing features and needs less fitting parameters to assess the unstructured terrain.

中文翻译：

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一种考虑土壤力学和车轮几何特征的非结构化地形分段承载力方法

摘要 本文分析了考虑车轮几何形状和土壤力学特性影响的非结构化地形承载力。进行二维压力下沉模拟以评估平板和车轮之间的相似度，根据 Terzaghi 理论的极限承载特性。结果表明，这些相似程度主要体现在土壤深度方向和相应的破坏行为上。基于车轮与平板极限承载力的近似，提出了一种受土壤力学性质和车轮三维几何形状影响的分段承载力评价方法。所提出模型的压力下沉值与实验值显示出令人满意的一致性。