Service life of hydraulic structure reinforced concrete elements according to protective layer carbonization criteria

Abstract

In the given article the design of service life for hydraulic structure reinforced concrete elements has been performed analytically with the use of the basic techniques and by constructing reinforced structure protective layer carbonization models, mathematic modelling methods for physical processes. The main goal of the work is to determine the service life for reinforced concrete structures of spillways and its elements under impact of the environment during their operation.

Results and analysis of field research in flood reservoirs in Kashkadarya region

“…Therefore, the reservoirs located in the basins of these rivers are often damaged by floods. It is caused by the accumulation of large amounts of sediments in the basins of water and flood reservoirs built in the river basins [8][9][10][11][12][13][14][15][16][17][18][19].…”

“…Parameters of turbid sediments in flood reservoirs, which have been in use for several years, differ sharply from the design calculations. According to the results of the research, the total volume of sedimentary deposits in these reservoirs can be determined as follows [4][5][6][7][8][9][10][11][12][13]:…”

“…According to the analysis of the mechanical composition of sedimentary deposits, the average percentage by particle diameters and their weight is as follows. : d >0.5 mm -0.1 %; d= 0.25-0.5 mm -0.79%; d = 0.1-0.25 mm -2.33%; d= 0.05-0.1 mm -53.22%; d= 0.01-0.05 mm -13.46%; d= 0.005-0.1 mm -8.92%; d<0.005 mm -21.18%; d av = 0.05 mm [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Unsteady filtration under maximal draw-off velocities of Tupolang water reservoir

“…Great attention is being paid to purposeful research works, devoted to theoretical and experimental studies of unsteady filtration in Earth-fill dams, and their influence on stability of Earth-fill dam upper slope. In this regard, one of the important tasks is to improve methods of unsteady filtration design in the body and bank massifs of Earth-fill dams, determining the influence of unsteady filtration to carrying capacity of water passage structures [2][3], [5][6], [21][22][23][24].…”

Influence of speed of filling and draw-off to the filtration regime of Earth-fill dam

“…Great attention is being paid to purposeful research works devoted to theoretical and experimental studies of unsteady filtration in earthfill dams and their influence on the stability of the earthfill dam upper slope. In this regard, one of the important tasks is to improve methods of unsteady filtration design in the body and bank massifs of earthfill dams, determining the influence of unsteady filtration on the carrying capacity of water passage structures [2][3], [5][6], [21][22].…”