engleski

Geophysical investigations at municipal solid waste landfill Jakuševac

Within the process of landfill design and defining design parameters for the construction of new, or for the old landfill remediation, long-term, expensive and relatively restricted borehole drilling is implemented. Borehole investigations give data like point with very difficult soil sampling in waste material. Deformability of waste material is crucial for the mechanical bearing resistance of the landfill. A physical-mechanical property of the landfill material depends on waste material composition, volume and density, as well as moist and landfill age that sets the rate of the total settlement. This paper presents geophysical investigations of Municipal Solid Waste (MSW) for a detection area of intense settlement of Jakuševac landfill body. Data were generated by utilizing geophysical methods: Multichannel Analysis of Surface Waves (MASW), 2D Electrical Resistivity Tomography (ERT) and Microtremor HVSR (Horizontal-to- Vertical Spectral Ratio). MASW results help in detecting layering lithology, depth of the soil mass and elastic properties (stiffness) of waste. Geoelectrical tomography results in fine spatial profiling of the landfill body, as well as potential aquifer contamination and clay lining system detection. Microtremor HVSR is a fast and simple method to determine local site effect, or to determine the predominant frequency and amplification factor. Anomaly determined by geophysical investigations and presented on geophysical profiles are correlated with the position of the biggest settlement visible on landfill cover system. 2D display of shear wave velocities from MASW seismic method is a direct image of deformation characteristics of the waste. Engineering- geology properties of the bedrock can also be defined from the Microtremor HVSR and ERT investigations, as well as estimation of the total volume of the waste material.

landfill; municipal solid waste; MASW; ERT; Microtremor HVSR

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