SHEAR STRENGTH CHARACTERISTICS OF FIBROUS SOLID WASTE MATERIALS IN LANDFILL SITES

Abstract

Slope-stability failures have occurred in several improper landfills and illegaldumping sites. To investigate the shear response of municipal solid waste (MSW), it issignificant to consider the stability of dumping site and landfill design. In the present paper,the shear response and shear strength of MSW recovered from four different landfill sites (inJapan and China) were investigated using a developed in-situ direct shear test apparatus.Moreover, the pa-per introduces the steps for preparation of undisturbed samples and testprocedures in details to determine the in-situ shear strength characteristics (c and φ) of MSW.The in-situ experimental results indicated that the shear response of waste materials affectedby the existence of fibrous materials. In addition, the values of cohesion and frictionparameters of waste materials strongly depended on the percent of fibrous materials. Resultsof geotechnical investigations and slope stability studies of landfill sites have been alsointroduced.