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首页> 外文期刊>Geotechnique >Subsurface deformation mechanisms beneath a flexible pavement using image correlation
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Subsurface deformation mechanisms beneath a flexible pavement using image correlation

机译：使用图像相关性的柔性路面下面的地下变形机制

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Flexible pavement structures are widely used in road construction, especially in circumstances where very high traffic volumes are not expected. These structures comprise multiple layers of granular material, which generally have decreasing strength with depth. Failure of these systems is typically observed as rutting on the ground surface, but the failure instigates at depth. In this research, for the first time, observations can be directly made of the progressive failure of these deeper layers under repeated wheel loading due to the combination of a new test apparatus, the Cambridge accelerated pavement tester (APT) and digital image correlation (DIC) technology. The use of a window allowing observation of soil displacements at depth during repeated wheel loading cycles allows the progressive failure to be observed and the changes in soil displacements and strains with different layer thicknesses to be quantified. It was observed that the critical failure mechanisms for thin and thick surficial layers are different, resulting in changes in the rates of surface rutting. Understanding these deformation mechanisms potentially allows savings to be made in road or airfield construction by using correctly sized structural layers.
机译：柔性路面结构广泛用于道路施工，特别是在不预期非常高的交通量的情况下。这些结构包括多层粒状材料，其通常具有减小的强度。这些系统的失效通常被观察到地面上的车辙，但是失败在深度时煽动。在这项研究中，由于新的测试装置，剑桥加速路面测试仪（APT）和数字图像相关（DIC），首次可以直接观察地直接由这些更深层次的逐步失效，这些较深层次的渐进层。 ） 技术。在重复轮装载循环期间允许观察到深度的窗口的使用允许观察到的逐渐失败，并且土壤位移和具有不同层厚度的菌株的变化。观察到薄和粗曲面层的临界失效机制是不同的，导致表面车辙率的变化。了解这些变形机制可能允许通过使用正确尺寸的结构层在道路或机场建设中进行节省。

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