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Centrifuge validation of soil improvement prediction using the WAK test analysis

机译：使用WAK试验分析进行土壤改良预测的离心机验证

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摘要

The development of the low-energy dynamic compaction process for modest but rapid improvement of the soil properties of foundation soils has provided a viable and economical alternative to traditional ground improvement methods for derelict land. The concept of using the WAK (Wave Activated Stiffness (K) test) to monitor the degree of improvement during the process has prompted a rigorous programme of centrifuge modelling to validate the method. Results from field tests and centrifuge modelling have shown that both the subgrade reaction modulus of the foundation soil and the system damping derived from the analysis using different diameter footings agree well with theoretical values. This corroboration suggests that the depth of improvement may also be predicted given the footing diameter used to compact the foundation soil, and that the effective depth of improvement is of the order of 1·25 times the footing diameter for all footing diameters.
机译：为适度但快速改善基础土壤的土壤性能而开发的低能动力压实方法，为传统的废弃土地改良方法提供了一种可行且经济的选择。在过程中使用WAK（波动刚度（K）测试）来监测改进程度的概念促使严格的离心机建模程序验证了该方法。现场测试和离心模型的结果表明，基础土的路基反应模量和使用不同直径基础的分析得出的系统阻尼与理论值非常吻合。这种佐证表明，给定用于压实基础土壤的立足直径，还可以预测出改善的深度，并且对于所有立足直径，有效的改善深度约为立足直径的1·25倍。

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