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Behaviour of unsealed stabilized road pavements using non-linear strength model

机译：使用非线性强度模型的未密封稳定路面的性能

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Applications of soil stabilization in unsealed road pavements are increasing being applied in Australia and worldwide. These include using standard stabilizers such as cement, flyash, polymers, resins, acids, as well as using non-standard stabilizers in the forms of enzymes. The pavement designs based on such stabilizers are predominantly based on either project experience or site specific laboratory and/or field tests based properties. The behaviour of the underlying materials, in particular partial saturation and non-linear nature, is often neglected for simplicity in the design approaches which are currently in-place. The current research investigates the behaviour of unsealed roads subjected to operational traffic using the unsaturated Coulomb-strength model. Firstly, laboratory experiments were conducted on the basis of clay soil to investigate the stabilized and non-stabilized strength properties. Having calibrated the model, 3-D FE analyses were conducted to predict the response of unsealed road pavement under traffic loads. The results showed that the response of stabilized road pavements using realistic non-linear strength envelop is substantially different from the traditional pavement response predictions. Thus, it is required to adopt partial saturation and soil non-linearity for more realistic assessments of stabilization contribution during design than are currently used.
机译：在澳大利亚和世界范围内，土壤密封在未密封道路路面上的应用正在增加。这些措施包括使用标准稳定剂，例如水泥，粉煤灰，聚合物，树脂，酸，以及使用酶形式的非标准稳定剂。基于这种稳定剂的路面设计主要基于项目经验或基于特定地点的实验室和/或现场测试的特性。为了简化当前使用的设计方法，通常会忽略底层材料的行为，尤其是部分饱和和非线性特性。当前的研究使用非饱和库仑强度模型研究了未封闭道路在运营交通中的行为。首先，在黏土的基础上进行了室内实验，以研究稳定和非稳定的强度特性。校准模型后，进行了3​​-D有限元分析以预测交通荷载下未密封道路的响应。结果表明，使用实际的非线性强度包络线对稳定的路面的响应与传统的路面响应预测有很大不同。因此，需要采用局部饱和度和土壤非线性度，以便在设计过程中比目前更实际地评估稳定作用。

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