Life prediction for spillway facility side wall

Abstract

This article includes the analytical assessment of the durability and remaining life of the I-st category reinforced concrete structures by the fracture mechanics approaches, the prediction is based on the consideration of temporal changes in the structural features of a particular type of concrete. The main purpose of this work is to determine the durability of reinforced concrete structures and the remaining life of the spillway and components in the implemented modes and operating conditions that ensure their safe operation and environmental protection. When predicting the durability of the spillway reinforced concrete structures, each structure is considered as a component of the structure behavior scheme. The result of the durability predictions is presented in years, which can eventually determine the remaining life of the structural component of spillway.

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].…”

“…In general, it is practically impossible to completely remove the sediments in the upper basin from the flood reservoir zone. However, if appropriate measures are not taken to reduce their amount, such hydropower plants may become completely unusable after several years [8][9][10].…”

“…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].…”

Recommendations for Improving the Reliability of Hydraulic Structures in the on-Farm Networkrecommendations for Improving the Reliability of Hydraulic Structures in the on-Farm Network

“…Irrigation systems are associated with the failure of hydraulic structures, can even be caused by the failure of one structural element [18,19,20].…”