抗滑桩或桩板墙桩底支承错误选用的设计风险
Design Risk of Incorrect Selection of Bottom Support of Anti-Slide Pile or Pile Wall

抗滑桩和桩板墙设计计算时，很多规范认为嵌入岩石较深时可选用自由或铰接，个别规范甚至支持固定。本文通过Midas civil软件模拟抗滑桩计算，讨论桩底自由、铰接和固定不同约束的计算结果差异，并提出支承错误选用的风险，建议规范对桩底约束宜采用自由端进行计算，尤其是在变形控制时应采
In the design and calculation of anti-slide piles and pile walls, many codes believe that when the rock is embedded in deep, free joints or hinge joints can be used, and some codes even support fixing. In this paper, the calculation of anti-slide piles is simulated by Midas-Civil software geotechnical calculation. The differences in the calculation results of free pile bottom, hinged pile bottom and fixed pile bottom are discussed, and the risk of wrong choice of support is put forward. It is recommended that the free end should be used in the calculation of the pile bottom constraint in the code, especially in the deformation control, the constraint of the hinged and fixed pile bottom should be deleted to avoid use the wrong model, and the actual engineering deformation is too large.