Municipal solid waste is a specific type of a soil-like material. Waste landfills are always placed near urban settlements and occupy sizeable territories, which are irretrievably withdrawn from circulation. As a result of the permanent process of waste generation, landfill areas are steadily growing. There has been a tendency of a landfill capacity increase in waste storage types of 20 and more meters in height lately. This height increment is accompanied by both the increase of loads applied to the subsoil and stresses and deformations in a waste massif. As a result, the evaluation of stability becomes necessary, for which physical-mechanical properties of waste, as well as prediction of their changes in time are required. The application of modern nondestructive methods of field determination of mechanical properties of waste has significant advantages over the traditional approaches. One of these nondestructive methods is a multichannel analysis of surface waves (MASW). This method allows measurements in the weathering zone of the near-surface part of the profile during the field testing of soils and solilike materials, when it is practically unrealizable to select and restore undisturbed samples. When applying the MASW-method, the data along the geological cross-section are usually obtained as mean values along the defined depth, which is suitable for the investigations of homogeneous massifs of municipal solid waste.

In this paper, a new model is presented for calculating the thermal conductivity of soils, and the main provisions for the derivation of analytical formulas are given. The presented model allows taking into account the density, moisture content and temperature of the soil base. The technique presented in the paper makes it possible to dispense with laborious experiments to estimate the thermal conductivity of the soil. The method of analytical calculation is step by step presented in the paper. Two variants of using the method are proposed: 1) Less accurate method, for preliminary evaluation, without the need to take probe and conduct experiments. 2) More accurate method, with at least one experiment with a disturbed or undisturbed sample. The results of comparison of calculated values of thermal conductivity and experimental data are presented.

The cone penetration testing of MSW by piezocone (CPTU) in combination with the multichannel analysis of surface waves (MASW) provide extensive data about estimated values of physico-mechanical properties of wastes, which are usually unavailable in traditional approaches and which can be directly used in geotechnical stability calculations of the waste massif

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Municipal solid waste (further MSW) occupy considerable sites of urban territories. Behaviour of “fresh” MSW is characterized by deformation hardening similarly to stress-strain state of pseudocohesive unsaturated soils reinforced by randomly oriented fibers. Distinctive feature of MSW is predominant orientation of reinforcing component in one horizontal direction, which is associated with the technology of waste deposing on the landfills. During first decades after placement processes of chemical and biological decay proceed in waste massif. After their completion MSW are classified as waste soil with maximal particle size not more than 20 mm. With the progress of biodegradation deformation hardening of MSW under loading is decreasing.