The deformation and failure parameters of six mixtures of cement-modified loess have been determined based on direct tensile stress testing, indirect tensile test testing and unconfined compressive stress testing. Results have been used to determine the parameters of the Mohr-Coulomb failure criterion and the parameter of the Hoek-Brown failure criterion. The Hoek-Brown model clearly shows that results from indirect tensile stress measurement must be weighted to describe materials properly. Both models’ results were then used to calculate the safety factor of a road structure with cement-modified loess used as subgrade material using reduction techniques. Specifically, for the Hoek-Brown model, a new calculation adapted to structures with tensile stresses is proposed. Results vary by around 8.9 for the Mohr-coulomb model and around 3.2 for the Hoek-Brown model.

This shows, at the laboratory scale, that resource-based economies could be expected if cement-modified loess mechanical parameters were considered in the design of structures. It also shows that the Hoek-Brown model is a promising tool to study tensile stressed structures made with cement-modified materials.

通过直接拉应力试验、间接拉应力试验和无侧限压应力试验，确定了六种水泥改性黄土混合物的变形破坏参数。结果已用于确定 Mohr-Coulomb 破坏准则的参数和 Hoek-Brown 破坏准则的参数。Hoek-Brown 模型清楚地表明，必须对间接拉伸应力测量的结果进行加权才能正确描述材料。然后，这两个模型的结果都用于计算使用还原技术将水泥改性黄土用作路基材料的道路结构的安全系数。具体而言，对于 Hoek-Brown 模型，提出了一种适用于具有拉伸应力的结构的新计算。莫尔库仑模型的结果相差大约 8.9，大约为 3。

这表明，在实验室规模上，如果在结构设计中考虑水泥改性黄土力学参数，则可以预期资源型经济。它还表明，Hoek-Brown 模型是研究由水泥改性材料制成的拉伸应力结构的有前途的工具。