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采用小波动方法结合剪切位移法，将主体弹性模量视为沿深度方向的一维平稳随机场，推导出了柔性桩桩项沉降响应方差的解析表达式。通过算例分析了桩端为不同支撑条件下桩顶沉降响应方差与竖向相关距离的关系。得出了柔性桩桩瑞上与桩周土弹性模量相等时桩顶沉降响应方差更接近于桩端自由的情况；当土弹性模量的竖向自相关距离大于桩长时其变化对桩顶沉降响应方差影响不大的结论。
Using small wave method combined with shear displacement method, the principal elastic modulus is regarded as a one-dimensional stationary random field along the depth direction, and the analytical expression of settlement response variance of flexible pile is deduced. The relationship between the settlement response variance and the vertical correlation distance of pile top under different supporting conditions is analyzed by an example. The results show that when the elastic modulus of flexible pile is higher than that of surrounding soil, the settlement response of pile top is closer to the free end of pile. When the vertical autocorrelation distance of elastic modulus is greater than that of pile, Top settlement response to the effect of small differences in the conclusion.