The relevance of the problem under study is due to the fact that in the process of transporting demolition waste, it becomes necessary to reduce the negative impact of harmful factors on the environment. The aim of the study is to reduce the negative impact on the environment during transportation and to select optimal solutions. As a result of the study, the factors influencing the formation of the transport chain were identified, which reduce the negative impact of some harmful factors on the environment during the transportation of construction waste. Also, as a result of simulation, optimal combinations of important factors were formed in the conditions of urban infrastructure, which made it possible to reduce the estimated indicators of harmful effects on the environment.

The relevance of the problem under study is due on the one hand to the need to reclaim disturbed areas formed as a result of construction activities, on the other hand to the need to find useful use of demolition products of buildings and structures. The purpose of the work is to study the possibility of using multimodal logistics for the use of demolition products in the reclamation of disturbed areas, using the example of granite quarries. Geoecological, technological and economic forecasting of multimodal logistics of urban agglomeration demolition products will allow to develop the most optimal schemes of their useful use. As a result of research, mathematical models have been developed for predicting the formation of a transport and logistics chain for the removal of demolition products from objects. For the first time, a scheme has been developed for choosing a method of moving demolition products depending on the range of the burial place for making substantiating decisions on their removal in the process of designing measures for the reclamation of granite quarries from the point of view of geoecological and economic expediency. It is scientifically justified to use demolition products as fillers of spent granite quarries for temporary storage, partial or complete filling with subsequent reclamation of spent quarries. The materials of the article can be useful for the development of technological solutions for the reclamation of disturbed areas using demolition products of buildings and structures.

The article considers the problem of soil contamination in St. Petersburg with heavy metals. It has been shown that the degree of contamination is such that soils lose their ability to self-clean and can be attributed to technologically modified soils. Geochemical barriers are required to reduce the concentration of heavy metals. Based on the principle of A.I. Perelman, it is shown that the most promising wastes of the construction industry for use in geochemical barriers are silicate-containing wastes from demolition of buildings and structures. Capacity of heavy concrete and aerated concrete in relation to some heavy metals is determined in the work. The absence of selectivity of wastes to various heavy metals is shown. The formula for calculation of the life of the geochemical barrier taking into account its size, capacity and amount of contamination coming with melted and rain drains is proposed. The life of the geochemical barrier is calculated to prevent the migration of iron ions in the form of a railway embankment, which amounted to 47 years, provided that granite crushed stone is completely replaced by heavy concrete.

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