Seismic Response of Soil-Like Material in MSW Landfill Using Equivalent Linear Approach

Abstract

Soil-like material (SLM) is one of the most important and the largest proportion of reclaimed materials from the old municipal solid waste (MSW) landfills which usually constitute over 50% of the excavated materials. The engineering properties of SLM vary with the depth from which it has been obtained which shows the dependency on the age of the material. This variation in properties leads to varied response when subjected to various loads. So, it becomes necessary to study the behaviour of the SLM under different loading conditions so that it can be used safely as a filling material in construction works. In this paper, the seismic response of the SLM has been analysed by DEEPSOIL using an equivalent linear approach. The data available in the literature for SLM from landfills is used, and then, equivalent linear-frequency domain solution is being applied in pressure-dependent modified Kondner Zalesko soil model with the Chi-Chi input motion seismic vibrations, and the seismic responses of different layers are discussed. At last, based on the observed response of the SLM materials, effect of various factors like age of waste from MSW landfills and engineering properties is discussed.