The post-cyclic mechanical behaviors of subgrade soil are usually assessed by conventional cyclic triaxial tests, however, the stress field induced by traffic loads consist of not only a cyclic deviator stress, but cyclic confining pressure and shear stress. Meanwhile, the pore water is allowed to be discharged under traffic loads. Furthermore, the traffic load-induced excess pore water pressure can be partially dissipated after load-cycling. Thus, different reconsolidation processes should be considered. Recognising this, cyclic loading with variable confining pressure was applied to remoulded laterite soils under partially drained conditions, and reconsolidation was allowed. The development of effective stress paths, excess pore water pressure, and undrained strength of post-cyclic shear process were analysed. Results show that the development of effective stress paths is similar and all stress paths cross the critical state line. Besides which, the remoulded laterite clay always has a positive excess pore water pressure and tend to dilate. The undrained strength will be increased under different conditions such that the greater the cyclic confining pressure, cyclic deviator stress, number of cycles, and degree of reconsolidation, the larger post-cyclic undrained strength. Moreover, the post-cyclic undrained strengths between cyclic loading with and without cyclic confining pressure were compared: the undrained strength ratio of cyclic confining pressure to that under constant confining pressure increases linearly with increasing slope of the stress path. Nevertheless, the post-cyclic undrained strength after reconsolidation can be obtained by the corresponding undrained strength without reconsolidation: the ratios of post-cyclic shear strength with and without reconsolidation increase with increasing degree of reconsolidation. At a certain slope of stress path, the undrained strength increases linearly with degree of reconsolidation.

路基土的循环后力学行为通常通过传统的循环三轴试验进行评估，然而，交通荷载引起的应力场不仅包括循环偏应力，还包括循环围压和剪应力。同时，允许在交通荷载作用下排放孔隙水。此外，交通荷载引起的超孔隙水压力可以在荷载循环后部分消散。因此，应考虑不同的重新合并过程。认识到这一点，在部分排水条件下对改造后的红土土施加可变围压的循环荷载，并允许重新固结。分析了有效应力路径、超孔隙水压力和后循环剪切过程不排水强度的发展。结果表明，有效应力路径的发展是相似的，所有应力路径都跨越临界状态线。此外，改造后的红土粘土总是具有正的超孔隙水压力，并有膨胀的趋势。循环围压、循环偏应力、循环次数和再固结程度越大，循环后不排水强度越大，不排水强度在不同条件下会增加。此外，还比较了循环加载和无循环围压下循环加载后的不排水强度：循环围压与恒定围压下的不排水强度比随着应力路径斜率的增加而线性增加。尽管如此，再固结后的循环后不排水强度由相应的不再固结不排水强度求出：随着再固结程度的增加，有再固结和不再固结的循环后抗剪强度比值增加。在一定的应力路径斜率下，不排水强度随再固结程度线性增加。