The estimation of changes in the ecological situation and bottom topography in the Ob Bay, which may be caused by the construction of the approach channel to the port of Sabetta, was carried out with the help of the developed complex of numerical models. Particular attention was paid to the study of the displacement of the boundaries of the saline water expansion and the sediment accumulation in the channel area. It is established that the possible influence of the approach channel on the hydrologic-hydrochemical characteristics is less than their natural interannual and seasonal variability in the investigated water area. The change in the bottom topography after the construction of the approach channel does not entail a significant change in the regime of hydrologic-hydrochemical parameters of the Ob Bay and, consequently, should not affect the biocenosis. The calculated changes in the bottom topography in the approach channel area will not exceed 2 % of the depth per year and will not become a significant obstacle to the reliable and uninterrupted operation of the Sabetta port.

There are considered the results of stress-strain state analysis of polymer diaphragm in the body of the 50 m high earthfill cofferdam of Gibe III dam. The diaphragm is made of polyvinylchloride (PVC) geomembrane and has a zigzag location. Computations were conducted with the finite element method. A thin geomembrane was modeled by rod-shaped finite elements. Computations showed that the diaphragm made of geomembrane is a sufficiently safe seepage-control element: there are small tensile stresses on its individual sections. The geomembrane damage may occur in it only in the part anchored to the upstream shell. Considerable tensile stresses appear in anchors which are comparable with the geomembrane tensile strength. If the geomembrane is made of PVC, there will be a margin of safety. It is not recommended to anchor the diaphragm into the upstream shell but make it only into the downstream shell.

The article presents the research of MGSU Corporation for testing of design solutions of the “Eastern petrochemical company” JSC oil refinery and petrochemical plants port complex using the physical modeling method. Construction of the marine terminal of the oil refinery and petrochemical plants port complex is planned to be on the Eastern shore of the Vostok Bay which is the part of Peter the Great Bay in the Sea of Japan. The port area is created by means of an artificial land site. The water area of the terminal will be guarded against sea waves by a breakwater. Experiments on the study of wave propagation in the port model water area at the Eastern and Western breakwaters were performed in the laboratory wave basin in three-dimensional layout, with the aim of obtaining of data about wave heights at berthing facilities. Effectiveness of the breakwater designs was studied in two-dimensional layout in a wave flume. During the port model construction all the designed waterworks as well as the project bathymetry of the port water area were reproduced at a scale of 1:100. Analysis of the experiment results with the slope protection embodiment version demonstrates that this engineering solution is able to withstand waves of the design parameters.

There was studied the stress-strain state of 215 m high rockfill dam where the seepage-control element is presented by a reinforced concrete face of soil-cement concrete placed on the under-face zone. Calculations were carried out for two possible variants of deformability of rock outline taking into account the non-linearity of its deformative properties. It was obtained that the reinforced concrete face and the soil-cement concrete under-face zone work jointly as a single construction - a double-layer face. As the face assembly resting on rock is made with a sliding joint the scheme of its static operation is similar to the that of the beam operation on the elastic foundation. At that, the upstream surface of the double-layer face is in the compressed zone and lower one is in the tensile zone. This protects the face against cracking on the upstream surface but threatens with structural failure of soil-cement concrete. In order to avoid appearance of cracks in soil-cement concrete part due to tension it is necessary to achieve proper compaction of rockfill and arrange transverse joints in the double-layer face.

The article deals with technique of creation and results of calculations of the three-dimensional geofiltrational model of the Rogun HPP construction site. When performing works on creation of the Rogun HPP three-dimensional geofiltration model, geological and hydrogeological conditions of the Rogun HPP construction site were analyzed. They showed that the construction site consists mostly of fractured rocks of various weathering degrees. In terms of preservation, four preservation zones were identified in the rock mass. These zones define the features of hydrogeological conditions that have emerged in the area of construction. Calculation results illustrated the absence of seepage areas on the lower slope of dam; this is the indication of normal operation of the dam impervious circuit. The drainage system of the underground hydropower plant has a high efficiency. Operation of the drainage galleries complex leads to a significant reduction of piezometric pressure on roofs of the machine and transformer halls. Above the underground structures a completely drained area is formed. Completed forecast calculations on geofiltration model of the Rogun hydropower plant determine the hydrostatic pressure and piezometric pressure at any point of the modeled area. These data can be used as loads while designing of lining of underground workings.

The article focuses on the assessment of stress-strain state of soil mass of dock-type lock chamber. Numerical modeling of the soil mass of dock-type lock chamber with a continuous bottom is performed. The soil model was selected, and calculation of stress-strain state of the lock chamber soil mass was performed applying the PLAXIS 2D programming and computing suite. In the process of the structure stress-strain state analysis the assessment of its state in conditions of filling-emptying of the lock chamber was performed. To assess the possibility of reducing the load of the backfill soil and pore pressure on the lock chamber wall, the article discusses the simulation of excavation of upper part of the lock chamber backfill; also, the possibility of replacing of clay soil filling by sandy soil filling is considered. A numerical modeling results verification with field observations materials obtained during operation of the facility was performed according to the results of calculations of horizontal and vertical shifts of the facility. The study demonstrated a satisfactory convergence of the results of calculations performed in the Plaxis programming and computing suite with the field observations materials. Presented calculation results show that the replacement of upper part of backfill soil without combining with other structural measures can not duly change the load from the soil on the chamber wall, nor its stress state.

The article discusses a quality assessment method for transport decisions made in transport interchange hubs. Analysis of domestic regulatory documentation and international experience on this subject is performed. It is stated that the domestic regulatory documentation lacks such method of assessment. Special attention is paid to study of pedestrian flows in interchange complexes of intermodal transport interchange hubs. The aim of the study is development of the Level of Service comprehensive assessment criterion by analogy with the international practice. The authors propose to use the queueing theory with elements of the theory of graphs, techniques and regularities that underlie the Level of Service (service factor applied in planning and location of TIH in the USA) as well as data from field surveys carried out by the pedestrian flows video detection method. During the field surveys it is planned to perform analysis of external and internal factors influencing the formation and composition of a pedestrian flow, to determine quantitative values of the main parameters of pedestrian flow (density, speed, intensity) and regularities of their variation depending on the design features of pedestrian traffic environment. Determination of passenger service quality factors in TIH will help to develop an integral criterion based on the Level of Service, taking into account the specifics of TIH functioning in Russia as well as a methodology that allows a reasonable choice of combinations of structural elements and planning parameters of pedestrian traffic objects which will let to reduce construction costs and operating costs for location of interchange complexes.

Ensuring the safe operation of buildings and structures of increased responsibility in complex engineering and geological conditions requires a special approach to engineering surveys and construction. When designing ground bases, it is necessary to take into account the dynamic effects of man-made or natural origin. In this case, it is necessary to provide for a complex of special studies of the foundation soils. The results of the investigations make it possible to obtain the mechanical properties of soils necessary for subsequent calculations. As a rule, calculations are performed in modern software systems by numerical simulation of the "foundation-construction" system. Forecasting the stress-strain state of the soil base, taking into account special studies of soils and numerical modeling, allows to ensure strength and stability, as well as safe operation of the proposed structure during its entire service life.

Experimental study of bearing capacity of samples of two series performed by semiautomatic welding in CO2 on the axis, and by robotic welding machine in mixture (CO2 + Ar), is presented. Welds of constant cross section, welds with extended leg on end sections, and welds in the form of two dowels on end sections were performed. Efficiency of pilot samples of the first series (with extended leg on end sections by way of a smooth transition) defined by the ratio of weld metal volume to a crushing load reaches 28 % relative to samples with a leg constant as per length. Samples of the first series with an extended leg on end sections also showed efficiency increased to 17 %. According to the second series samples test results, the exceeding of bearing capacity of the samples performed with an extended leg on end sections by 24 % in comparison with the samples with a leg of constant cross section was determined. Samples of the second series performed in the form of two dowels on end sections demonstrated the exceeding of the relative bearing capacity by 42 % in comparison with the samples with a continuous leg of constant cross-section.

For the purpose of soil strengthening or increasing water impermeability, the cement grouting is widely used in the underground construction in conditions of dense urban development. An obvious advantage of cement grouting is environmental safety, high performance, durability, economic attractiveness. The ground conditions of the urban environment are characterized by extreme heterogeneity, which necessitates the use of various technological solutions for their cement grouting. In this work the analysis of application of various technologies of inject grouting providing the given efficiency of the accepted design decisions is executed.

This paper shows that quite a large number of economic mechanisms reducing risk of occurrence of an emergency situation have been designed. These mechanisms are understood as complexes of interrelated evidence-based policies, procedures and methodological solutions that provide optimal economic forms of regulation in the field of safety management and risk management at the federal, regional and facility levels. The paper shows the management model and emphasizes the major economic mechanisms for managing safety level: economic responsibility mechanisms, risk redistribution mechanisms, mechanisms for generation and usage of budgetary and extra-budgetary funds, incentive mechanisms for the enhanced safety level, reservation mechanisms in case of emergencies.

Article studies the problem of development of optimal plans of funding of activities for procurement and repair of particular samples of measuring equipment (ME) for the stock including several types of ME, under various restrictions for the funding. As the underlying research method, the simplex method for solving of a linear programming problem with equalities and inequalities constraints is used. It is assumed that as per the level of technical excellence the equipment can be modern or outdated, and as per the level of technical condition - operable or faulty. Mathematical model for record keeping of transitions of ME samples from an operable state into a faulty state is worked out. It is shown that, within the framework of this model, the indicators of modernity and operability of measuring equipment stock (MES) are linked by a linear dependence. As the optimality criterion, the MES modernity indicator is used; the MES operability indicator and operability indicators for each ME type are used as the constraints. While studying possible rational financing options, the modernity indicators for different types of ME also are used. Results of solving of the basic problem for different values of funding amounts for procurement and repairs are presented. Structure and sequence of optimal funding is revealed.

Economic sustainability of any organization, including small organizations of investment and construction sector, has a complex and ambiguous concept. Sustainable development of organization is a continuous process of permanent dynamic changes in which there is a close consistency between such integral elements as: efficient use of resources, scientific and technical development of organization, implementation of various innovations in production process, improving of staff competence, and institutional changes. They all are aimed at optimization of existing and future potential of organization, satisfaction of needs and achievement of set strategic objectives. Under conditions of instability of market economy, the achievement of effective sustainable development of enterprise and its integration into the existing organization management becomes one of the most important tasks. The article offers to perform a comparative analysis within the framework of projections, with the purpose of identifying of “threats” by external factors and “advantages” by internal factors. This will help to identify the most serious “threats” as well as the most powerful “advantages” for further development of strategy for improving of sustainability of small enterprises of the investment and construction industry. It is also assumed that there is a possibility of use of small business advantages with the aim of reducing of negative effect of “threats” by external factors by way of targeting of these advantages. Analysis of “threats” by external factors and “advantages” by internal factors demonstrated that each aggregate of “threats” can be opposed to the aggregate of “advantages” within the corresponding projection. If the growth of small enterprise characteristics is smooth enough it can be said of sustainable development of this enterprise.

The paper shows the management model and emphasizes the major economic mechanisms for managing safety level: economic responsibility mechanisms, risk redistribution mechanisms, mechanisms for generation and usage of budgetary and extra-budgetary funds, incentive mechanisms for the enhanced safety level, reservation mechanisms in case of emergencies. A large number of economic mechanisms have been designed as complexes of interrelated evidence-based policies which provide optimal economic forms of regulation in the field of safety management and risk management at the federal, regional and facility levels.

The article discusses a possibility of formation of a student-manager’s corporate social responsibility (CSR). A clear request on the part of the business for study of corporate social responsibility has formed currently in Russia. In our opinion, solution to this problem is possible in the system of modern higher education. In order to understand what problems pertaining to implementation of the CSR principles exist in modern Russian companies of the construction sector, how they are resolved, what social programs are used to resolve them, whether our students studying at the 38.03.02. “Management” course of training are ready or not to observe the CSR principles in their work, we carried out a social study (the results are presented in the article). The following conclusions were made: 1) The majority of the polled students are aware of the need for knowledge of the CSR principles to manage the company’s social activity; 2) They understand that they don’t have enough knowledge about social programming methods, that they do not know the algorithm of its implementation, that they are not always able to choose the right direction of possible social activity of the company in view of existing problems; 3) Students understand the importance of CSR for sustainable development of the organization. Modern higher education aimed at training of managerial staff is capable to realize this need and adequately respond to the growing interest of the business to a range of the CSR problems.