Effect of wall sliding effect on filtration properties of soils of protecting constructions of slurry storage
Keywords:sludge storage, hydrodynamic accident, surfactant, retaining structure, sludge, wall slip effect, viscosity, critical filtration rate, polyacrylamide
Purpose. To determine the indicators that allow an objective assessment of the risk of emergencies on the protective structures of the slurry storage facilities of the Republic of Belarus.
Methods. Field and experimental studies, statistical processing of their results.
Findings. The empirical conformity of the dependence of filtration coefficient of sandy soils on the content of polyacrylamide in the sludge with the concentration of 0.17–0.9 mg/dm3 (wall slip effect). The coefficient of filtration for soil of protective constructions of slurry storage of the Republic of Belarus taking into account polyacrilamide available in slurry is determined. By experimental studies and field observations 1.2–1.4 times excess of the sludge filtration rate of 0.045–0.047 cm/s over the filtration rate of water was proved.
Application field of research. In the assessment of the probability of the occurrence of hydrodynamic accidents at protection structures of sludge storage facilities of the Republic of Belarus.
Conclusions. The results of the assessment of the risk of emergencies in the sludge storage of Belarus, taking into account the new data, are of practical importance for the determination of management decisions and technical measures to prevent the occurrence of hydrodynamic accidents in this type of facilities and to minimize their consequences.
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