Abstract
Estimation of aggressiveness of filtration flow in the dam body is gaining importance in providing the stability of reservoir dam and its parts. In order to estimate the aggressiveness of filtration flow in the dam body it is necessary to know the movement pattern of filtration water in reservoir dam and its effect on dam elements. The article brings up the definition of gradients of filtration flow in the dam body, analysis of the reasons of their change by cross section at the example of Tashkent reservoir dam. Besides, chemical composition of water in piezometers has been analyzed, aggressive effect of sulfate salts on piezometers, and their corrosion have been determined. Measures on systematic piezometer observations are mentioned.
Highlights
The goal of the research is to determine filtration flow gradients in the dam body, analyze the reasons of their change by cross section, estimate water filtration effect on structure elements at the example of Tashkent reservoir dam
Tashkent reservoir dam cross section is shown in Picture 1
The analysis show, that according to the design results, filtration water movement velocity and head differences are large and filtration path is short in the section between piezometers 1,2 and 3, but in section between piezometers 3,4 and 5 filtration water movement velocity and head differences are low and filtration path is long
Summary
The goal of the research is to determine filtration flow gradients in the dam body, analyze the reasons of their change by cross section, estimate water filtration effect on structure elements at the example of Tashkent reservoir dam. In order to estimate the aggressiveness of filtration flow in the dam body it is necessary to know the movement pattern of filtration water in reservoir dam and its effect on the dam elements. Filtration water in the reservoir dam body usually move in chaotic flow, in particular, filtration flow is nonpressure flow. It is known, that in nonpressure flow filtration flow has an open surface, moves towards the side from the upper part of the dam to its lower part.
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