Abstract
The present study aims to convert the space of former municipal waste landfills to an urban development. This aim is however difficult at this moment because existing landfills have such significant problems as long-term subsidence and low rigidity. Due to lack of foregoing comprehensive studies on such mechanical properties of municipal waste, the authors collected real waste from a landfill in Tokyo and carried out consolidation as well as shear tests in the laboratory. This text introduces the results of those tests concerning compressibility, shear rigidity, and behavior under seismic load. It is noticeable that municipal waste behaves in a very similar manner as soil mechanics state.