Dynamics of an earth dam with account for rheological properties of soil under dynamic effect

Abstract

The design, construction and operation of high earth dams in seismic regions of the republic require continuous improvement of the methods to calculate them on basic loads and special combinations of them, including seismic ones. The aim of this work is to improve the calculation methods for earth dams, taking into account the real physical and mechanical characteristics of structure and its foundation soil under various types of loads. Improved calculation methods make it possible to predict the stress-strain state of the most vulnerable points in the dam, which will lead to a reliable and safe operation of earth dams in seismic zones.

Flow calculations in intake structures of hydropower plants

“…The data obtained show that the maximum recorded speeds when cleaning from bottom sediments near the bottom are on average 1.5 times higher than the average value of the rate during siltation [5,8].…”

“…When performing the work, methods of hydraulic study of the flow structure based on wellknown measurement methods were used. The reliability of the data obtained in the course of theoretical research is proved by mathematical methods of checking the adequacy of experimental results and field studies of a quantitative assessment of the conditions of water intake from the middle and extreme water intake chambers and objective data of these conditions on the reliability and efficiency of operation of the pumps [5,6].…”

“…Their designing and usage require the acquaintance with broad around of hydromechanical discipline. The scheme of the count of the energy potential HES in a certain fold with consumption Q and pressure Н must consider that part of pressure gets lost when a motion of water from the fence of water before unit [1][2][3][4][5][6][7].…”

Calculation of bottom sediment discharge in trapezoidal channels

“…The existing computational methods for determining Underground Discharge were recommended based on the experimental data of several researchers. Based on the analysis of these methods, Van-Rijn [3] method was seen to have a slight advantage over other proposed [6][7][8][9][10][11][12][13][14][15][16] methods. For this reason, the same method was chosen in improving the calculation method of tubular discharge in large graded channels [27][28][29][30][31][32].…”

The beginning of the movement of bottom sediments in an unsteady flow

“…Therefore, it is no coincidence, which the study of erosion processes caused by wave flows.In most cases, begins with the study of the structural features of the boundary layer, which in natural conditions is predominantly turbulent. Now, thanks to the fundamental research of a number of authors [3,8,9,18,19,20], in the theory of the boundary layer to achieve sufficiently great success. However, in view of the great mathematical difficulties in describing the process of formation of a boundary layer under conditions of an oscillatory (oscillating) nature of motion.At the present stage, there are still entertaining gaps, and first of all, in the field of reliable quantitative assessment of the parameters of non-stationary layers, which largely determines the correctness making design decisions in hydraulic engineering.…”