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Model of nonlinear behavior applied to prediction of settlement in deep foundations

机译：非线性行为模型在深基坑沉降预测中的应用

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Prediction of pile settlement is considered as a highly complex task by geotechnical engineering researchers and professionals, owing to the diversity of prediction methods and also to the difficulty to use predictive models that represent the nonlinear behavior of the soil. In this sense, this work assesses two methods for nonlinear prediction of the settlement of a 23-m long, 31-cm diameter instrumented root pile tested via slow maintained load (SML) test. The local subsoil is composed of colluvional silty-sandy, lateritic clay with a collapsible surface layer (6.5 m), followed by silty clayey sandy soil (diabase residue) down to 20 m. The results showed that the models of nonlinear behavior were in appropriate agreement with the experimentally obtained results. It was also noted that, for small displacements of the top (5.1 mm), the tip load increased continuously from its reaction to the final stage of the test.
机译：岩土工程研究人员和专业人士认为，桩沉降的预测是一项高度复杂的任务，这是因为预测方法的多样性以及使用代表土壤非线性行为的预测模型的困难。从这个意义上讲，这项工作评估了通过缓慢保持载荷（SML）测试对23 m长，直径31 cm的插桩桩进行沉降非线性预测的两种方法。局部下层土壤由具有可塌陷表层（6.5 m）的红土型粉砂质粘土组成，其后为低至20 m的粉质粘土质砂质土壤（辉绿岩残渣）。结果表明，非线性行为模型与实验结果吻合得很好。还应注意的是，对于顶部的较小位移（5.1毫米），尖端载荷从反应开始到测试的最后阶段不断增加。

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