TY - JOUR
T1 - A new large-scale shear apparatus for testing geosynthetics-soil interfaces incorporating thermal condition
AU - Chao, Zhiming
AU - Fowmes, Gary
AU - Mousa, Ahmad
AU - Zhou, Jiaxin
AU - Zhao, Zengfeng
AU - Zheng, Jinhai
AU - Shi, Danda
PY - 2024/10
Y1 - 2024/10
N2 - 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.
AB - 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.
KW - Temperature-controlled interface shear apparatus
KW - Geosynthetics-soil interface
KW - Monotonic shear test
KW - Cyclic shear test
KW - Creep shear test
U2 - 10.1016/j.geotexmem.2024.06.002
DO - 10.1016/j.geotexmem.2024.06.002
M3 - Article
SN - 0266-1144
VL - 52
SP - 999
EP - 1010
JO - Geotextiles and Geomembranes
JF - Geotextiles and Geomembranes
IS - 5
ER -