Abstract: In order to explore the influence of cement content and confining pressure on the strength of stabilized subgrade soil, the influence of uniaxial compressive strength, cohesion, internal friction angle and other mechanical parameters on the mechanical properties of cement stabilized subgrade soil is obtained through the indoor unconfined compressive strength test and triaxial compression test. The correlation between unconfined compressive strength and stabilizer is studied by regression analysis. The fitting formula of compressive strength and cement content is given to predict the reasonable range of cement content. The results show that the unconfined compressive strength, shear stress and residual strength increase with the increase of cement content, the cohesion first increases and then decreases slightly, and the internal friction angle moves up and down slightly. The shear peak stress and residual strength increased with the increase of confining pressure.

Key words: road engineering, cement stabilized soil, unconfined compressive strength, triaxial compression test, regression analysis

摘要： 为探究稳定固化路基土的强度受水泥掺量和围压的影响程度,通过室内无侧限抗压强度试验与三轴压缩试验,得到水泥稳定路基土的单轴抗压强度、黏聚力、内摩擦角等力学参数和各因素对水泥稳定路基土力学性质变化规律的影响。采用回归分析法研究了无侧限抗压强度和稳定剂的相关性,给出了抗压强度与水泥掺量的拟合公式用于预测水泥的合理掺量范围。结果表明:水泥稳定路基土在一定水泥掺量范围内,随水泥掺量的增加,无侧限抗压强度、剪切应力、残余强度均增大,黏聚力先显著增大后略微下降,内摩擦角上下略微波动;剪切峰值应力与残余强度随围压增大显著增大。

关键词: 道路工程, 水泥稳定土, 无侧限抗压强度, 三轴压缩试验, 回归分析