LARGE SCALE CENTRIFUGE TEST OF A GEOMEMBRANE-LINED LANDFILL SUBJECT TO WASTE SETTLEMENT AND SEISMIC LOADING

摘要

A large scale centrifuge test of a geomembrane-lined landfill subject to waste settlement and seismic loading was conducted to help validate a numerical model for performance based design of geomembrane liner systems. The test was conducted using the 2-m x 1-m shaking table on the 9.1 m-radius, 240 g-ton centrifuge at the University of California at Davis Center for Geotechnical Modelling under the U.S. National Science Foundation Network for Earthquake Engineering Simulation Research (NEESR) program. A 0.051 mm specialty geomembrane was used to model the liner system. Model instrumentation included thin film polymer strain gages to monitor geomembrane strains and accelerometers to monitor base excitation and waste mass response. The centrifuge model was subjected to an input design motion intended to simulate the Kobe 0807 motion from the 1994 Hyogo-ken Nanbu earthquake at three progressively increasing peak ground accelerations. Upon completion of the project, all data will become publically available via the NEESR data warehouse.