Introduction. Nowadays, the study of landslide processes is one of the most intensive aspects of construction and maintenance of industrial and civil buildings and installations. The landslides violate the stability of foundations and entire complexes of installations, so the assessment of the stability of the slopes is the most important task before starting the construction. Currently, there is a large number of landslide classifications, which characterize the conditions of their formation, the history of geological development, their age, and structure. Normative documentation gives three ways of slope slump control: preventive, restricting, and liquidation ones. However, this source does not give systematic validity of the engineering solutions. The study sets the following tasks: to develop an algorithm for the optimal choice of rational slope strengthening in landslide construction conditions and to test it with a specific example. Materials and methods. The study analyzed the publications on theoretical and practical experience in dealing with landslides as well as normative documents. Numerical simulation methods were used to calculate the slope stability when testing the algorithm. Results. Using the introduced classification, the study presented an algorithm that makes it possible to choose a rational way of slope strengthening under landslide construction conditions. The concept of the algorithm allows step-by-step approximating parameters of a landslide-prone slope model to the real conditions, on the one hand, and selecting the most reasonable anti-landslide measures, on the other hand. The developed algorithm was tested on the territory of a large industrial complex situated on river overflood plain fringes. By applying the value engineering comparison of several slope stabilization variants, the research has taken the most optimal one of them for realization. Conclusions. The study developed the author’s classification and algorithm for the selection of optimal design solutions to stabilize landslide-prone slopes or slants. Successful approbation of the algorithm confirmed its practical applicability. The algorithm allows choosing the most effective complex for protection against landslides.

No abstract

Introduction. Storage facilities, designated for the toxic production waste and located on the premises of the former Sredne-Volzhsky chemical plant in Chapayevsk, Samara Region, are sources of negative environmental impacts. The situation is aggravated by the lack of a reliable seepage prevention circuit at toxic waste storage facilities, enclosed by natural impermeable layers. The purpose of the study is to substantiate the choice of the optimal base for seepage prevention curtains along the perimeter of toxic waste storage facilities by clarifying the filtration characteristics of impervious soils using the interpretation of special experimental filtration works, followed by the testing of the effectiveness of engineering solutions using the developed geological filtration model. Materials and methods. Processing Modflow is the software designed for the 3D filtration and pollutant transport modeling. The input data for a geological filtration model included technical reports on engineering surveys conducted in 2013 on the premises of the former Sredne-Volzhsky chemical plant, as well as the results of special experimental and filtration works and plant site level observations interpreted using the ANSDIMAT software. Results. The filtration characteristics of the clay rocks of Upper Quaternary deposits were clarified as a result of the interpretation of special experimental and filtration works by the ANSDIMAT software through graphic analytical methods, and the application of a numerical model by the Processing Modflow software to imitate these works. The resulting characteristics confirmed the usability of this engineering geological element as the base for the designed anti-seepage curtains. The Processing Modflow software was applied to confirm the high efficiency of the filtration prevention circuit, which allowed to significantly reduce inflows in toxic waste storage facilities in the course of their reclamation. Conclusions. In the process of reclamation of the area, occupied by the former Sredne-Volzhsky chemical plant, the option, recommended for implementation, is the installation of anti-seepage curtains around the perimeter of the toxic waste storage facilities for the circuit to be enclosed by the clay rock of the Upper Quaternary deposits. The proposed engineering solution will allow the highly toxic filtrate to be concentrated inside the toxic waste storage facilities to prevent its penetration into the environment.

No abstract

No abstract