Stability performance and interface shear strength of geocomposite drain/soil systems

摘要: Landfill covers are designed as impermeable caps on top of waste containment facilities after the completion landfill operations. Geocomposite drain (GD) materials consist a geonet or geospacer (as drainage core) sandwiched between non-woven geotextiles that act separators and filters. GD provides function part cover system. The stability performance system is largely controlled by interface shear strength mobilized elements cover. If used, properties upper surface overlying soil may govern It not uncommon for fine grained to be used soils. In these cases, understanding softening issues at with geotextile important. Such can caused capillary break behaviour build-up water pressures from toe upwards into soil. interaction processes allow flow core through soil-geotextile very complex. This paper reports main in-situ soil-GD using field measurements trial Bletchley, UK. due soaked show reduction in this aspect should emphasized design specifications construction control. results also help increase confidence implications systems.