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Sand-Nonwoven geotextile interfaces shear strength by direct shear and simple shear tests

机译：砂-非织造土工布通过直接剪切和简单剪切试验得出的剪切强度

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摘要

Soil-reinforcement interaction mechanism is an important issue in the design of geosynthetic reinforced soil structures. This mechanism depends on the soil properties, reinforcement characteristics and interaction between these two elements (soil and reinforcement). In this work the shear strength of sand/geotextile interfaces were characterized through direct and simple shear tests. The direct shear tests were performed on a conventional direct shear device and on a large scale direct shear apparatus. Unreinforced sand and one layer reinforced sand specimens were characterized trough simple shear tests. The interfaces shear strength achieved with the large scale direct shear device were slightly larger than those obtained with the conventional direct shear apparatus. Notwithstanding the differences between the shear strength characterization through simple shear and direct shear tests, it was concluded that the shear strength of one layer reinforced sand is similar to the sand/geotextile interface direct shear strength.
机译：土-筋相互作用机制是土工加筋土结构设计中的重要问题。这种机制取决于土壤的性质，补强特性以及这两个元素（土壤和补强）之间的相互作用。在这项工作中，通过直接和简单的剪切试验来表征砂土/土工织物界面的剪切强度。直接剪切试验是在常规的直接剪切装置和大型直接剪切设备上进行的。通过简单剪切试验对未增强的砂和一层增强的砂样品进行了表征。用大型直接剪切装置获得的界面剪切强度比常规直接剪切装置获得的界面剪切强度稍大。尽管通过简单剪切试验和直接剪切试验表征的剪切强度有所不同，但可以得出结论，一层增强砂的剪切强度类似于砂/土工织物界面的直接剪切强度。

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