挤扩支盘支护桩是一类新型支护桩,其结构特点是部分桩体横截面积大于桩顶。介绍了挤扩支盘支护桩这种新型的支护形式,探讨了在加荷载作用下直桩与挤扩支盘支护桩的水平位移特点,利用有限元软件PLAXIS分别采用摩尔—库仑模型(MC模型)和土体硬化模型(HS模型)进行模拟计算,得到了挤扩支盘支护桩应用和本构关系模型选择的合理化建议。 Squeeze-out support plate is a new type of branch support pile, its structural features are part of the pile cross-sectional area larger than the top of the pile. The new form of support for the pillaring pile with the expanded branch was introduced. The horizontal displacement characteristics of the piles supported by the piles and the expanded branch under the action of applied load were discussed. By using the finite element software PLAXIS, the Mohr-Coulomb model (MC model) and soil hardening model (HS model) were simulated and the reasonable suggestions for the application of crowded-out support pile and the constitutive model selection were obtained.