A review: Microscopic approach on geosynthetic-soil interface

摘要

Different materials comprise interface at each boundary and the interface exists inevitably in allrngeotechnical systems. The interface shows complicated and sensitive behavior because it is affected by manyrnpractical factors such as material, load, environment, etc. Geosynthetic-soil interface is typical at the wasternlandfill site and the dynamic shear behavior is critical to the seismic stability of the site. Chemical aggressor inrnthe leachate affects the shear strength of the geosynthetic-soil interface. In this research, chemical degradationrnof the interface was investigated by cyclic simple shear test and different shear stress degradation patternsrnwere estimated. The Disturbed State Concept (DSC) was employed to analyze the test results. Microscopicrnobservation by Focused Ion Beam (FIB) was introduced and utilized to clarify the variation of interface damage.rnConsequently, the variation of the cyclic shear behavior at geosynthetic-soil interface was due to the differentrndamage pattern at soil particle surface by FIB observation. Note that this is a review of the previous study.