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在沿海软土地区修建高重大建筑物，以及海洋工程中大型采油平台的建造中，所使用的桩一般具有较大的长径比，而长径比较大的桩易使桩侧土出现软化．当桩侧土出现软化后，使用常规设计方法确定的桩基承载力偏于不安全．基于修正的双曲线模型，推导了适用于桩侧土出现软化时群桩变形研究的计算公式．利用该算法能正确预估桩侧土出现软化后群桩的ｐ－ｓ曲线，从而为合理确定桩侧土出现软化时群桩的承载力提供理论依据．将该算法用于预估桩侧土出现软化后的现场实测群桩变形曲线，所得结果令人满意．
In the construction of high-major buildings in coastal soft soil areas and in the construction of large-scale oil production platforms in offshore engineering, piles used generally have large aspect ratios, and piles with large long diameters tend to soften the side soil. When pile side soil softens, the bearing capacity of pile foundation determined by conventional design method is unsafe. Based on the modified hyperbolic model, the formulas for the study of group pile deformation when pile soils are softened are deduced. The algorithm can correctly predict the p-s curve of the pile group after softening of pile side soil, so as to provide a theoretical basis for reasonably determining the bearing capacity of the group pile when the pile side soil softens. This algorithm is used to predict the field pile deformation curve after softening of pile side soil. The result is satisfactory.