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Use of the permanent strain rate to analyze the effect of superheavy vehicles on pavements: Field validation
Transportation Geotechnics ( IF 5.3 ) Pub Date : 2021-06-10 , DOI: 10.1016/j.trgeo.2021.100603
Erdrick Pérez-González , Jean-Pascal Bilodeau , Guy Doré

In the development and maintenance of hydroelectric, mining, or oil industries, it is necessary to transport elements with non-conventional load magnitudes. The approval or rejection of the road network's use by vehicles carrying this type of load is conditioned on the pavement's capacity to withstand these special loading conditions without suffering considerable damage. The quantification of permanent deformation in granular materials is one of the critical parameters to consider. The authors have recently proposed a model for analyzing the effect of superheavy loads based on the rate of permanent deformation in granular materials. The model has been developed from laboratory tests, and its applicability has been demonstrated with numerical model results. In this paper, field measurements were used to validate the proposed model. Field stress measurements were used to predict the probable ranges for plastic strains using the model, and these results were compared with the plastic strains measured in the field. Consistency between predicted ranges and field measurements was observed in five cases of superheavy vehicles, evaluated at different speeds and climatic conditions. An adjustment factor for the field stresses is introduced to improve the model prediction, and typical values for the parameters of the deformation rate model are given in the paper.



中文翻译:

使用永久应变率分析超重型车辆对路面的影响:现场验证

在水电、采矿或石油工业的开发和维护中,需要运输具有非常规载荷大小的元件。批准或拒绝承载此类负载的车辆使用道路网络取决于路面承受这些特殊负载条件而不会遭受相当大的损坏的能力。颗粒材料永久变形的量化是需要考虑的关键参数之一。作者最近提出了一个模型,用于基于颗粒材料的永久变形率来分析超重载荷的影响。该模型是根据实验室测试开发的,其适用性已通过数值模型结果证明。在本文中,现场测量被用来验证所提出的模型。现场应力测量用于预测使用该模型的塑性应变的可能范围,并将这些结果与现场测量的塑性应变进行比较。在五个超重型车辆案例中观察到预测范围和现场测量之间的一致性,在不同的速度和气候条件下进行评估。引入场应力调整因子以改进模型预测,并给出了变形率模型参数的典型值。在不同的速度和气候条件下进行评估。引入场应力调整因子以改进模型预测,并给出了变形率模型参数的典型值。在不同的速度和气候条件下进行评估。引入场应力调整因子以改进模型预测,并给出了变形率模型参数的典型值。

更新日期:2021-06-17
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