Bimsoils are mixtures of large geotechnically significant competent blocks embedded in a weaker soil matrix. Conventional design approaches usually account for the matrix strength characteristics, while empirical approaches use the volumetric block proportion (VBP) to modify matrix strength considering the presence of blocks. This article outlines a numerical approach to study the 2D bearing capacity of bimsoils, considering block sizes between 5% and 75% of the footing width, areal block proportions up to 70% of the problem domain as well as welded and unwelded block-matrix-contacts. Sampling algorithms to produce monodisperse and polydisperse block distributions were developed. Bimsoil samples were investigated using finite-element limit analysis. Results were presented in terms of a dimensionless factor ${\mathrm{\Phi }}_{\gamma /c}$. The results showed that not only VBP but also the size of the blocks had a major influence on the bearing capacity. An explanation for this observation was supported by the shape of the failure surface, whose complexity significantly increased with increasing block sizes and block proportions. Moreover, larger shear strengths found in the block-matrix-interface due to welded block-matrix-contacts led to larger bearing capacities. This effect was more dominant in a frictional rather than a cohesive soil matrix.

混合土是嵌入较弱土壤基质中的大型岩土工程有效块的混合物。传统的设计方法通常考虑基体强度特性，而经验方法使用体积块比例 (VBP) 来修改考虑块的存在的基体强度。本文概述了一种数值计算方法，用于研究Bimsoils的2D承载力，考虑了块尺寸介于基础宽度的5％至75％之间，面积块比例高达问题域的70％以及焊接和未焊接的块矩阵-联系人。开发了产生单分散和多分散块分布的采样算法。使用有限元极限分析对 Bimsoil 样品进行了研究。结果以无量纲因子表示${\mathrm{\Phi }}_{\gamma /C}$. 结果表明，不仅VBP而且砌块的尺寸对承载力有重大影响。破坏面的形状为这种观察提供了解释，破坏面的复杂度随着块尺寸和块比例的增加而显着增加。此外，由于焊接的块体-基体接触而在块体-基体界面中发现较大的剪切强度导致更大的承载能力。这种影响在摩擦性土壤基质中比在粘性土壤基质中更为显着。