1. A new large-scale shear apparatus for testing geosynthetics-soil interfaces incorporating thermal condition.
- Author
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Chao, Zhiming, Fowmes, Gary, Mousa, Ahmad, Zhou, Jiaxin, Zhao, Zengfeng, Zheng, Jinhai, and Shi, Danda
- Subjects
- *
LOW temperatures , *HIGH temperatures , *TESTING equipment , *TEMPERATURE - Abstract
Geosynthetics-soil interfaces are exposed to varying temperatures coupled with complex stress states. Quantifying the mechanical response of the interface considering this combined influence of temperature and complex stress is always a huge challenge. This study proposes a new displacement and stress-loading static and dynamic shear apparatus that is capable of testing the geosynthetics-soil interfaces with high and low-temperature controlling function. The apparatus satisfactorily simulates monotonic and cyclic direct shear tests, and creep shear tests on geosynthetics-soil interfaces at temperatures ranging from −30 °C to 200 °C. To validate the functionality of this device, a series of temperature-controlled experiments were conducted on different types of interfaces (sand-geogrid interfaces, sand-textured geomembrane interfaces, sand-smooth geomembrane interfaces). The experimental results indicate that the apparatus can simulate static, dynamic, and creep shear loading on geosynthetics-soil interfaces in high and low temperature environments, and these can be measured reliably. It also manifests that temperature has a non-negligible influence on all mechanical interface responses. These findings highlight the significance and potential of the proposed apparatus and its practical implications. • Developing a new temperature-controlled static and dynamic interface shear apparatus. • A series of temperature-controlled interface experiments were conducted. • Temperature has non-negligible influence on interface mechanical properties. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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