A new large-scale shear apparatus for testing geosynthetics-soil interfaces incorporating thermal condition

Zhiming Chao, Gary Fowmes, Ahmad Mousa, Jiaxin Zhou, Zengfeng Zhao, Jinhai Zheng, Danda Shi

Research output: Journal PublicationArticlepeer-review

7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)999-1010
Number of pages12
JournalGeotextiles and Geomembranes
Volume52
Issue number5
DOIs
Publication statusPublished - Oct 2024

Keywords

  • Temperature-controlled interface shear apparatus
  • Geosynthetics-soil interface
  • Monotonic shear test
  • Cyclic shear test
  • Creep shear test

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Materials Science
  • Geotechnical Engineering and Engineering Geology

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