The previous soil spring model cannot describe the nonlinear characteristics of soil in elastic stage, and there are some shortcomings in the selection of soil spring parameters in some published codes. Meanwhile, the literatures about the spring model for pipe and silty clay interaction are rare. Thus, a series of pipe-silty clay interaction tests are conducted, and some corresponding experimental results are obtained. The effects of soil properties, pipe diameter, and embedment depth on the horizontal resistance of soil are studied. Based on the experimental results, the failure modes of soil are analysed, and a formula to calculate the peak resistance of soil and the corresponding displacement to peak resistance are proposed. Finally, a method to describe the nonlinear spring stiffness coefficient of silty clay is recommended.

中文翻译：

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基于物理模型试验的管土与粉质黏土相互作用土弹簧模型研究

以前的土弹簧模型不能描述弹性阶段土的非线性特征，在某些公开的规范中，土弹簧参数的选择存在一些缺陷。同时，关于管道和粉质黏土相互作用的弹簧模型的文献很少。因此，进行了一系列管-粉质黏土相互作用试验，并获得了一些相应的实验结果。研究了土壤性质，管径和埋深对土壤水平阻力的影响。根据试验结果，分析了土体的破坏模式，提出了计算土体峰值电阻的公式和相应的峰值电阻位移。最后，提出了一种描述粉质黏土非线性弹簧刚度系数的方法。