* Metadata of the article in the English version is available in full starting in 2016.

Effect of wall sliding effect on filtration properties of soils of protecting constructions of slurry storage

UDC 622.867.322
Authors Mikanovich Dmitriy Stanislavovich
Lasuta Gennadiy Fedorovich, PhD in Agricultural Sciences
Abstract 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.
Keywords sludge storage, hydrodynamic accident, surfactant, retaining structure, sludge, wall slip effect, viscosity, critical filtration rate, polyacrylamide
  References
1. Iz-za katastrofy v Vengrii v Ukraine nachinaetsya vneplanovaya proverka dvukh krupnykh zavodov [Due to the catastrophe in Hungary in Ukraine, an unscheduled inspection of two large plants begins], available at: http://dozor.kharkov.ua/zhizn (accessed: March 15, 2010). (rus).
2. Viskozimetry kapillyarnye steklyannye. Tekhnicheskie usloviya (s Izmeneniyami No. 1, 2): GOST 10028–81 [Capillary glass viscometers. Specifications (with Changes No. 1, 2): GOST 10028–81]. Affirmed January 1, 1983. Moscow: Gostandart, 1983. 31 p.(rus).
3. Protokol ispytaniy prirodnykh i stochnykh vod No.8-V/13 [Test report on natural and waste waters No. 8-В/13]: Central research institute of complex use of water resources. Minsk: Central research institute of complex use of water resources, 2016. 1 p. (rus).
4. Grunty, metody laboratornogo opredeleniya granulometricheskogo (zernovogo) i mikroagregatnogo sostava: GOST 12536–79 [Soils, laboratory methods for determining the grain-size (grain) and microaggregate composition: State standard 12536–79]. Affirmed April 20, 1980. Moscow: Gostandart, 1979. 39 p.(rus).
5. Astarita Dzh. Osnovy gidromekhaniki nen'yutonovskikh zhidkostey [Fundamentals of non-Newtonian fluid mechanics]. Moscow: Mir, 1978. 230 p. (rus).
6. Spravochnik po gidrotekhnike [Handbook on hydraulic engineering]. Moscow: Gosudarstvennoe izdatel'stvo literatury po stroitel'stvu i arkhitekture, 1955. 901 p. (rus).
7. Arzumanov E.S. Kavitatsiya v mestnykh gidravlicheskikh soprotivleniyakh [Cavitation in local hydraulic resistances]. Moscow: Energiya, 1978. 385 p. (rus).
8. Uilkinson U.L. Nen'yutonovskie zhidkosti [Non-Newtonian fluids]. Moscow: Mir, 1964. 311 p. (rus).
9. Mel'nikov V.I. Spravochnik po klimatu Belarusi [Belarus climate handbook], Minsk: State Institution «Republican Center for Hydrometeorology, Control of Radioactive Pollution and Environmental Monitoring», 2017. 85 p. (rus).