We propose and verify the sliding failure mode in the passive zone of a foundation pit with skirt reinforcement using numerical experiments. Calculation of the passive earth pressure is based on the equilibrium condition of limited earth pressure. The advantage of this approach is that the stability of the support structure can be calculated using the shear strength parameters of undisturbed soil without these parameters for the soilcement. We discuss the passive earth pressure of foundation pits with reinforcement mass of finite width, in addition to different arrangements of the same volume and different shape. For specific projects, factors such as deformation control and project cost should also be taken into account when deciding the type of reinforcement mass form that should be used, in addition to meeting the stability requirements.

我们通过数值实验提出并验证了裙边加固的基坑被动区的滑动破坏模式。被动土压力的计算基于有限土压力的平衡条件。这种方法的优点是，可以使用原状土的抗剪强度参数来计算支撑结构的稳定性，而无需将这些参数用于污泥。除了具有相同体积和形状的不同布置之外，我们还讨论了具有有限宽度的加固质量的基坑的被动土压力。对于特定项目，在确定应使用的加固质量形式的类型时，除了要满足稳定性要求外，还应考虑变形控制和项目成本等因素。