Applied Mechanics and Materials Vols. 725-726

Abstract: The article deals with various optional combinations of upper and lower basins in pumped-storage power plants (PSPP) which determine ice conditions that may appear on water surfaces, headwater discharge basins and slopes basins. There are also examples of calculation methods of ice regimes that are given in this article.

Abstract: Current paper is dedicated to the analysis of world experience in automated estimations of hydropower potential and identification of places for prospective small hydropower plants construction. Emphasis is put on initial data, methodology and software used by researchers worldwide.

Abstract: In this article we have explored the issue of optimization of HPP site location in a cascade depending on social-economic, environmental and energy limitations taking into account available cadastre of water power resources. A multicriterion problem of optimization on the network was formulated. Pareto optimal solution of this problem was obtained by means of the developed mathematical model of optimization of the HPP site location in the cascade. The optimization algorithm to solve this problem has been developed

Abstract: During construction of port breakwater, especially if it is built from the sea, waves interact with the walls, having different finite lengths [3]. In this paper, tasks, connected with definition of wave loads on structure and scour near the structure on walls of finite length, are considered. To study these processes the special experiments have been carried [3, 8]. It were measured the wave loads on the walls of finite length and it was studied the formation of scour near the structure. A comparison was made of the experimental data with the existing analytical solutions and with experiments.

Abstract: The need to study the problem of seabed local scour near offshore platforms has arisen in Russian Federation in connection with the activation of oil and gas production from fields located in coastal areas of seas (in accordance with the Energy Strategy for the period up to 2030, approved by the Government of the Russian Federation on November 13, 2009, No1715-p). Operation of offshore platforms is characterized by a number of features: shallow water areas; severe storm conditions; large transverse dimensions of structures that cause waves diffraction; the variety of used structure forms; the way of platform mounting on the seabed. During platform operation in the shallow waters, its basement soil is under an intense impact of sea waves, currents, as well as jets from engine of coming and berthing ships. The structure disturbs the natural wave flow. Near the platform, flow velocity increases, there are vortexes breakaway from platform corner edges. Scour holes appear and progress near platform foundation. Their location and measure depend on the parameters of external impacts, on the water depth, on the shape and dimensions of the foundation block.

Abstract: The article offers a method, how to estimate the influence of tectonic fault displacements in the foundation of the dam on its stress-strain state, strength and stability. The technique involves analysis of ground-based observation data, processing of radar satellite images and computational research. Diagnostic indicators of neotectonic movements impact are developed with the use of ground-based monitoring data. Small baseline interferometry method is tested as a method of evaluation of recent tectonic activity in the area. The impact, which tectonic fault displacements have on the stress-strain state of a concrete dam, are researched using computational methods. Response of the control equipment in this case is also estimated.

Abstract: This paper describes the complex of geotechnical researches realized for the reconstruction of the gydroscheme on the creek Pevek. The estimation of the hydraulic facilities‘s state was realized on the base of researches from different years. The last complex of geotechnical surveys was conducted by authors in 2012 and include cryogenic, geophysical, geodesic and others geotechnical researches.

Abstract: By this research were decided most suitable bulk carriers for the upcoming developing terminals at the Far East of Russia (20 000 ‑ 190 000 DWT).

Abstract: In the considering problem usual tasks of designing ground dams (evaluation of filter strength, compressibility and ground permeability) are overlaid by new tasks, that have never touched upon earlier, that provide reliability of earth dams under extreme conditions and that are exposed by new additional forces such as intensive deformation and curvature of base. Here are dependences allowing determination of accepted values of earth surface deformation of ground dams on undermined territories. Using this methodology, you can compute required constructively technologic protection measures. Solution of such problems as predicting behavior and degree of reliability from external influence of a dam at given expected deformations, - can be brought into action. Prediction of conventional dams reliability may been carried out without underworking.

Abstract: The investigation in rock masses in interaction with engineering structures is extremely important in a process of design of tunnels. The main problem is how to extrapolate the parameter from the zone of testing to the whole volume that is of interes for interaction analyses of the system rock mass-structure. In this article Empirical-Statical-Dynamical (ESD) methodology of extrapolation is presented. The basis of the methodology lies in combination of the results from geotechnical and geophysical testings and rock mass classification, connected with definition of adequate regressive models.