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首页> 外文期刊>Advances in materials science and engineering >Evaluation of Interface Shear Strength Properties of Geogrid Reinforced Foamed Recycled Glass Using a Large-Scale Direct Shear Testing Apparatus
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Evaluation of Interface Shear Strength Properties of Geogrid Reinforced Foamed Recycled Glass Using a Large-Scale Direct Shear Testing Apparatus

机译：使用大型直接剪切测试仪评估土工格栅增强泡沫再生玻璃的界面剪切强度特性

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摘要

The interface shear strength properties of geogrid reinforced recycled foamed glass (FG) were determined using a large-scale direct shear test (DST) apparatus. Triaxial geogrid was used as a geogrid reinforcement. The geogrid increases the confinement of FG particles during shear; consequently the geogrid reinforced FG exhibits smaller vertical displacement and dilatancy ratio than FG at the same normal stress. The failure envelope of geogrid reinforced FG, at peak and critical states, coincides and yields a unique linear line possibly attributed to the crushing of FG particles and the rearrangement of crushed FG after peak shear state. The interface shear strength coefficientαis approximately constant at 0.9. This value can be used as the interface parameter for designing a reinforced embankment and mechanically stabilized earth (MSE) wall when FG is used as a lightweight backfill and triaxial geogrid is used as an extensible earth reinforcement. This research will enable FG, recently assessed as suitable for lightweight backfills, to be used together with geogrids in a sustainable manner as a lightweight MSE wall. The geogrid carries tensile forces, while FG reduces bearing stresses imposed on the in situ soil. The use of geogrid reinforced FG is thus significant from engineering, economical, and environmental perspectives.
机译：使用大型直接剪切试验（DST）设备确定土工格栅增强的再生泡沫玻璃（FG）的界面剪切强度性能。三轴土工格栅被用作土工格栅的增强材料。土工格栅在剪切过程中增加了对FG颗粒的限制。因此，在相同的法向应力下，土工格栅加固的FG的垂直位移和膨胀率比FG小。在峰值和临界状态下，土工格栅加固的FG的破坏包络重合，并产生一条独特的直线，这可能归因于FG颗粒的破碎和峰值剪切状态后破碎FG的重新排列。界面抗剪强度系数α大致恒定为0.9。当FG用作轻质回填和三轴土工格栅用作可扩展的土体增强材料时，该值可用作设计加筋路堤和机械稳定土（MSE）墙的界面参数。这项研究将使最近评估为适用于轻质回填的FG与土工格栅可持续地用作轻质MSE墙。土工格栅承载拉力，而FG减小施加在原位土壤上的轴承应力。因此，从工程，经济和环境的角度来看，土工格栅增强的FG的使用意义重大。

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