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通过各险极复合地基的单极载荷试验、极周上载荷试验、复合单元体载荷试验以及有限元计算得到，在小变形范围内复合单元体的沉降与按线弹性或Duncan双曲线模型的计算结果一致．桩侧摩阻力沿桩身的分布可简化为三角形．由此应力传递规律和Mindlin位移解答给出了弹性状态下复合单元体荷载～沉降关系的解析表达式，并且给出由单极及极周土的现场载荷试验来推求复合体荷载～沉降关系的方法
Through the unipolar load test, the polar load test, the composite unit load test, and the finite element calculation of each dangerous pole composite foundation, the calculation of the settlement and the linear elastic or Duncan hyperbola model of the composite element in a small deformation range The results are consistent. The distribution of pile friction along the pile can be simplified as a triangle. Based on the law of stress transfer and Mindlin displacement solution, the analytical expression of the load-to-settlement relationship of the composite element body under elastic state is given. The field loading test of unipolar and polar soil is used to derive the relationship between load and settlement of the composite body. method