The article is devoted to the study of the building of former Nikolaevskoe city school in Tyumen. The Institute of Design, Reconstruction and Restoration of Urban Environment Objects of LLC "Tyumenproekt" under the direction of Alexander I. Klimenko carried out a comprehensive scientific study, including historical and archival and bibliographic sources, as well as materials of field research, and made the most reliable graphic reconstruction of the object. The materials of the study may become the basis for further work, including the restoration project of building and its adaptation to the modern conditions of city life.

The paper presents the concept of the object-spatial environment of the coastal territory and water approaches of the Peschaniy Peninsula, located within the boundaries of Vladivostok urban district. Pre-project analysis, including photo-fixation of the current state of the territory, identification of its shortcomings and conducting a social survey, showed that it did not meet modern requirements for comfort and transport accessibility, had an aesthetically unattractive appearance. The main goal of the article was to suggest the project that would increase the quality of the urban environment and solve several problems of site improvement at once. Creating a comfortable urban environment, improving transportation accessibility of island and coastal territories, and developing tourist and recreational infrastructure are necessary for social and economic development of Vladivostok as the capital of the Far East.

Cross-laminated timber (CLT panel) and its structures are interesting for engineers and scientists due to its low installation weight, ease of fabrication, high strength and durability. However, many aspects remain under-researched. In particular, the issue of changes in deformability and bearing capacity of slabs under different variations of geometrical parameters in the layers of the structure had not been studied. We studied the effect of the pitch of the transverse layer in a three-layer CLT panel on the deformation and distribution of the resulting normal stresses. The model was a composite orthotropic plate. Because of the lack of a unified methodology for calculating layered materials with orthotropic properties in the layers, the studies were carried out by means of the SCAD+ computational complex using the finite element method. The article obtained, systematized and clearly showed the deflection and stress dependences of varying lamella pitch in the transverse layer of a three-layer CLT panel. The results provide a better understanding of the dependence of deformability and stress distributions on the variation of board pitch in the transverse layer of the slab. In the future, this will allow us to explore opportunities to optimize the design of the CLT panel in order to reduce its weight, cost, reduce resource consumption while maintaining the required characteristics.

The paper presents a database for estimation the magnitude of the settlement of an extended slab foundation of finite stiffness in the initial phase of projecting. The offered solution uses only interpolation methods without involving powerful computing devices. The computer program FEA, which formalises the finite element method, was used to obtain the result. The maximum horizontal and vertical dimensions of the computational schemes were . The computational scheme consisted of 57 500 finite elements in the form of right isosceles triangles conjugated at 29 106 nodes. The width of the stiffness matrix of the linear equation system was 466. This made it possible to eliminate the influence of trivial boundary conditions on the results. 560 computational operations were performed. It corresponded to the number of possible combinations of numerical values of the variables calculated parameters adopted in computer modelling of process of the slab foundation settlement. As an upshot of the computations, the authors made a table of coefficients of approximating expressions for the curves constructed from the results of the calculated dependences of slab foundation settlement on the variable design parameters. The article provides a calculation of settlements of two extended slab foundations of different widths, using a constructed database and interpolation methods. The control calculation in the FEA showed the difference between the values of the control settlements and the values obtained using the proposed tables and the linear interpolation method for 13.45 and 22.08 %. Summing up the results, the offered database can be used for preliminary (estimation) calculations of extended slab foundations settlements.

Based on the use of the assumptions of the theory of closed cylindrical shells by Vasiliy Z. Vlasov, the authors suggested an analytical method for the study of dynamic instability of pipelines. The nonstationary internal pressure induced by the pumping equipment of the pumping stations is considered as the stimulation source. This pressure excites the longitudinal compressive force, the elastic soil resistance reaction, and the velocity of the flowing fluid. The result of the proposed method is inequalities that take into account the damping properties of the ground and the above factors. By means of these inequalities, it can be determined the upper and lower limits of the region depending on the excitation frequency of the pumping station. And the estimation of the stability loss is reduced to the determination of the value of the natural pipeline frequency. If a point falls into the constructed region, the appearance of parametric resonance is inevitable. Comparison of the instability areas for elevated and underground installation depending on the longitudinal force parameter showed that the shift of the area for the underground method is towards the increase of the longitudinal force parameter.

Since the late 1970s, groundwater in the Tyumen region was widely used for drinking water supply. It was the reason of the widespread construction of deferrization stations. Analysis of literature and monitoring of some deferrization stations in the region for a long time allowed us to systematise the applied deferrization technologies in chronological order as they become more complex. The method of deferrization with simplified aeration was the most widespread in the initial stages. This decision facilitated the introduction of block-complete deferrization stations at medium and small capacity facilities. Nowadays, there is a transition from reagentless methods to reagent methods due to tightening of requirements to drinking water quality. This, accordingly, leads to the rejection of typical technological schemes of deferrization and the use of water treatment plants assembled from standard equipment units.

The review of foreign and domestic studies showed that the existing results of their generalisation in the form of some mathematical dependencies were insufficient and required further study and additional research. The technologies offered today are more complex but they are not economically optimal and efficient.

The object of the study is the process of traffic flow in cities, and the subject is this process in relation to regulated street intersections. The main goal of the study is improving the efficiency of traffic organization by preventing the formation of traffic congestion on the street and road network. To achieve this, the creation of an offset left turn was proposed. During the study, the street and road network of Tyumen was considered, and areas for possible construction of the offset left turn were identified. The regulated intersection of 50 Let VLKSM St. and Geologorazvedchikov St. was chosen as the most appropriate. The results of the study showed that the use of the offset left turn would significantly reduce traffic delays and accident risk by reducing conflict points. The evaluation of the effectiveness of proposed solutions also confirmed the positive technological, social, economic and environmental effects.

It is recommended to use modelling with the help of specialized software products to make managerial decisions about traffic control on urban streets. The object of the study is the regulated intersection of Tobolskiy Trakt St. and Sudoremontnaya St. in Tyumen. During the simulation micromodelling using the SmartAdaptive+ software product for potential implementation of adaptive traffic light control, we show that the current scheme of coordinated control can be supplemented with adaptive control at one of the nodes to minimize delays in both the main and crossing directions. Vehicle delays and maximum queue lengths under adaptive and tight regulation were calculated and compared using the statistical test method. With a maximum permissive phase of 75 s on the major direction and of 20 s on the minor direction, the shortest delays will be observed on both directions of intersection during the day.

The goal of this work was to test the practicability of using a device that provides airflow into the Laval nozzle channel to enable the application of metal coating by cold spraying. A turbine with an integrated Laval nozzle at the outlet was considered as a device to provide airflow into the Laval nozzle channel. The authors describe the equipment used in the calculations and the experimental study, the process of gas- dynamic calculation of the output velocity of the airflow injected by the turbine impeller and the results of this calculation with precise indices. As a result, functional dependences of the indicators that provide the possibility of using the turbine as a source of airflow have been obtained, and a conclusion about the inexpediency of using a turbine with an integrated Laval nozzle at the outlet to provide the possibility of metal coating by cold spraying has been formed.

The evolution of modern industry is impossible without the development of new materials and technologies. Nanostructured coatings, in particular electrolytic coatings, are among the most demanded in mechanical engineering. The purpose of this work was to study the different mechanisms of obtaining Fe-Ni, Co- Mn, Ni-Cr galvanic alloys and their relationship with the specified universal physical and mechanical properties. Fe-Ni alloy is characterized by high microhardness and corrosion resistance in sea water, low cold brittleness; Co-Mn – by a specified phase composition (α-Co >> α-Mn, amorphous and metastable phase Co(OH)₂); Ni-Cr – by high coating microhardness, specified phase composition. The main methods of production: high-frequency alternating current for Fe-Ni and Co-Mn alloys; introduction of a special additive (carbamide or H-acid) for Ni-Cr alloy. The main mechanisms are: Fe-Ni due to phase transition α-Fe → ε-Fe; Co-Mn by means of high-frequency alternating current and carbamide addition, providing a specified phase composition; Ni-Cr by means of stationary method of addition of H-acid (high-chromium alloy of 68 mass percent of Cr) and carbamide (low-chromium alloy of 25 mass percent of Cr). Recommended uses for electroplating: Fe-Ni – for protection of oil and gas production equipment in the Arctic; Co- Mn – in modulation systems and as a nanocatalyst in the Fischer-Tropsch synthesis reaction; Ni-Cr – for corrosion-resistant protective coatings in petrochemistry and for resistive elements.