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RESEARCH OF BUILDING MATERIALS

The influenceof nanoparticles orientation on water permeability through nanocomposites

Vestnik MGSU 7/2015
  • Matseevich Tat’yana Anatol’evna - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Physical and Mathematical Sciences, Associate Professor, Department of Higher Mathematics, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Popova Marina Nikolaevna - Moscow State University of Civil Engineering (MGSU) Doctor of Chemical Sciences, Associate Professor, Department of Composite Materials Technology and Applied Chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Afanas’ev Egor Sergeevich - A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Candidate of Chemical Sciences, senior research worker, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS), 28 Vavilova str., V-334, GSP-1, Moscow, 119991, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Askadskiy Andrey Aleksandrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Chemical Sciences, Professor, Department of Composite Materials Technology and Applied Chemistry, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 79-86

The problem of nanocomposites’ permeability regulation has been attracting the interest of scientists throughout the current decades. The works were dedicated to different models of permeability of the composites containing impermeable layered fillers in polymer matrix. It was shown that polymer films with parallel laid flat impermeable particles of the filler may have the permeability twice or thrice less than the films of the same size, but without a filler. The authors analyzed the influence of nanoparticles on water permeability through nanocomposites obtained on the basis of polymers and flat nanoparticles. The offered correlations take into account the chemical composition of the polymer and nanoparticles, as well as the surface structure in case of chemical modification. The shape of flat particles (tablet, brick, sphere) is also taken into account. The permeability is mostly influenced by nanoparticles concentration, their shape and size orientation angle.

DOI: 10.22227/1997-0935.2015.7.79-86

References
  1. McGrath J.E., Park H.B., Freeman B.D. Chlorine Resistant Desalination Membranes Based on Directly Sulfonated Poly(Arylene Ether Sulfone) Copolymers. US Patent Application 11/655319 (2007).
  2. Park H.B., Freeman B.D., Zhang Z.-B., Sankir M., McGrath J.E. Highly Chlorine-Tolerant Polymers for Desalination. Angewandte Chemie. 2008, vol. 47 (32), pp. 6019—6024. DOI: http://dx.doi.org/10.1002/anie.200800454.
  3. Xie W., Park H.B., Cook J., Lee C.H., Byun G., Freeman B.D., McGrath J.E. Advances in Membrane Materials: Desalination Membranes Based on Directly Copolymerized Disulfonated Poly (Arylene Ether Sulfone) Random Copolymers. Water Science and Technology. 2010, vol. 61 (3), pp. 619—624. DOI: http://dx.doi.org/10.2166/wst.2010.883.
  4. Knoell T. Municipal Wastewater. Chlorine’s Impact on the Performance and Properties of Polyamide Membranes. Ultrapure Water. 2006, no. 23, pp. 24—31.
  5. Geise G.M., Lee H.-S., Miller D.J., Freeman B.D., McGrath J.E., Paul D.R. Water Purification by Membranes: The Role of Polymer Science. Polymer Science, Ser. B. 2010, vol. 48, no. 15, pp. 1685—1718. DOI: http://dx.doi.org/10.1002/polb.22037.
  6. Geise G.M., Park H.B., Sagle A.C., Freeman B.D., McGrath J.E. Water Permeability and Water/Salt Selectivity Tradeoff in Polymers for Desalination. Journal of Membrane Science. 2011, vol. 369, no. 1—2, pp. 130—138. DOI: http://dx.doi.org/10.1016/j.memsci.2010.11.054.
  7. Greener J., Ng K.C., Vaeth K.M., Smith T.M. Moisture Permeability Through Multilayered Barrier Films as Applied to Flexible OLED Display. Journal of Applied Polymer Science. 2007, vol. 106 (5), pp. 3534—3542. DOI: http://dx.doi.org/10.1002/app.26863
  8. Genov Iv., Ganev R., Gospodinova N., Glavchev Iv. Water-Vapour Permeability of Polymer Films. Journal of the University of Chemical Technology and Metallurgy. 2010, vol. 45, no. 2, pp. 213—214.
  9. Islam M.A., Buschatz H. Assessment of Thickness-Dependent Gas Permeability of Polymer Membranes. Indian Journal of Chemical Technology. January 2005, vol. 12, pp. 88—92.
  10. Islam M.A., Buschatz H., Paul D. Non-Equilibrium Surface Reactions-A Factor in Determining Steady State Diffusion Flux. J. Membr. Sci. 2002, vol. 204, no. 1-2, pp. 379—384. DOI: http://dx.doi.org/10.1016/S0376-7388(02)00064-9.
  11. Islam M.A., Buschatz H. Gas Permeation through a Glassy Polymer Membrane: Chemical Potential Gradient or Dual Mobility Mode. Chem. Eng. Sci. 2002, vol. 57, no. 11, pp. 2089—2099. DOI: http://dx.doi.org/10.1016/S0009-2509(02)00068-4.
  12. Gennadios A., Weller C.L., Gooding C.H. On the Measurement of Water Vapor Transmission Rate of Hydrophilic Edible Films. J. Food Eng. 1994, vol. 21, no. 4, pp. 395—409. DOI: http://dx.doi.org/10.1016/0260-8774(94)90062-0.
  13. Morillon V., Debeaufort F., Blond G., Capelle M., Voilley A. Factors Affecting the Moisture Permeability of Lipid-Based Edible Films: A Review. Crit. Rev. Food Sci. Nutr. 2002, vol. 42 (1), pp. 67—89. DOI: http://dx.doi.org/10.1080/10408690290825466.
  14. Chen Y., Li Y. A New Model for Predicting Moisture Uptake by Packaged Solid Pharmaceuticals. Int. J. Pharm. 2003, vol. 255 (1-2), pp. 217—225. DOI: http://dx.doi.org/10.1016/S0378-5173(03)00089-9.
  15. Mizrahi S., Karel M. Accelerated Stability Test of Moisture Sensitive Products in Permeable Packages at High Rates of Moisture Gain and Elevated Temperatures. J. Food Sci. 1977, vol. 42, no. 6, pp. 1575—1578. DOI: http://dx.doi.org/10.1111/j.1365-2621.1977.tb08429.x.
  16. Del Nobile M.A., Buonocore G.G., Limbo S., Fava P. Shelf Life Prediction of Cereal-Based Dry Foods Packed in Moisture-Sensitive Films. Food Eng. Phys. Prop. 2003, vol. 68, no. 4, pp. 1292—1300. DOI: http://dx.doi.org/10.1111/j.1365-2621.2003.tb09642.x

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Rationale for the use of protective gaskets made of geotextiles and permeability evaluation of impervious coatings made of geomembranes

Vestnik MGSU 3/2015
  • Kosichenko Yuriy Mikhaylovich - Russian Research Institute of Land Improvement Problems (ROSNIIPM) Doctor of Technical Sciences, Professor, Deputy Director for Science, Russian Research Institute of Land Improvement Problems (ROSNIIPM), 190 Baklanovskiy prospekt, Novocherkassk, Rostov region, 346400, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Baev Oleg Andreevich - Russian Scientific Research Institute of Land Improvement Problems (RSRILIP) Candidate of Technical Sciences, Senior Researcher, Russian Scientific Research Institute of Land Improvement Problems (RSRILIP), 190 Baklanovskiy, Novocherkassk, Rostov oblast, 346400, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 48-58

The purpose of this paper is to design rationale for the use of protective pads of geotextiles and geomembranes permeability of PD using these pads. In order to justify the use of protective pads made of geotextile for reducing the defectiveness geomembrane soil fractions, the existing formulas to determine the thickness of the film element of impervious devices were examined. The calculations according to the formulas show that HDPE geomembrane with a minimum thickness of 1,0 mm, the protective lining of the geotextile should be applied at the average diameter fractions of soil of more than 6,5 mm, and for geomembranes HDPE - at a diameter of soil fractions of over 15,5 mm. In order to estimate the permeability of the TFG geomembrane using additional protective linings of geotextile in the scientific article the basic design schemes of such coatings with one and two layers of protective linings of geotextiles were considered. The evaluation results of water permeability of impervious surfaces with geotextile and for comparison - without geotextiles are given in a table. As it is shown by the data presented for the design scheme with a single layer of geotextile geomembrane at the base (in the presence of small holes in the geomembrane) the decrease the effectiveness of an anti-covering is more than 268,0 %, and for the settlement scheme covering with two layers of geotextile there will be a very large reduction in the efficiency, which almost completely reduces the effectiveness of the coating to the value of the geomembrane permeability of a soil layer without geomembrane with the filtration flow rate of 71,75 m
3/day, against water permeability of the geomembrane cover - 38,52 m
3/day. From the foregoing, it can be concluded that the application of a coating design of well filtering gaskets made of geotextile is justified in terms of protecting the geomembrane from mechanical damage, but greatly reduces the effectiveness of impervious cover in case of its damage.

DOI: 10.22227/1997-0935.2015.3.48-58

References
  1. Rasskazov L.N., Radzinskiy A.V., Sainov M.P. Vybor sostava glinotsementobetona pri sozdanii «steny v grunte» [Choosing the Composition of Clay Cement Concrete while Constructing the “Wall in the Soil”]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering]. 2014, no. 3, pp. 16—23. (In Russian)
  2. Rasskazov L.N., Aniskin N.A. Fil’tratsionnye raschety gidrotekhnicheskikh sooruzheniy i osnovaniy [Seepage Analysis of Hydraulic Structures and Bases]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering]. 2000, no. 11, pp. 2—7. (In Russian)
  3. Aniskin N.A. Temperaturno-fil’tratsionnyy rezhim prigrebnevoy zony gruntovoy plotiny v surovykh klimaticheskikh usloviyakh [Thermal and Filtration Behaviour of the Earth Dam Crest Area in Severe Climatic Conditions]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 4, pp. 129—137. (In Russian)
  4. Aniskin N.A., Antonov A.S., Mgalobelov Yu.B., Deyneko A.V. Issledovanie fil’tratsionnogo rezhima osnovaniy vysokikh plotin na matematicheskikh modelyakh [Studying the Filtration Mode of Large Dams’ Foundations on Mathematical Models]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2014, no. 10, pp. 114—131. (In Russian)
  5. Aniskin N.A., Memarianfard M.E. Uchet anizotropii v fil’tratsionnykh raschetakh i raschetakh ustoychivosti otkosov gruntovykh plotin [Accounts for Anisotropy in Seepage Analyses of Stability Calculation of Soil Dam Slopes]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 1, pp. 169—174. (In Russian)
  6. Sol’skiy S.V., Novitskaya O.I., Kubetov S.V. Otsenka effektivnosti drenazhnykh i protivofil’tratsionnykh ustroystv betonnykh plotin na skal’nom osnovanii (na primere Bureyskoy GES) [Efficiency Determination of the Drainage and Impervious Devices of Concrete Dams on Rock Base (on the Example of Bureyskaya HPP). Inzhenerno-stroitel’nyy zhurnal [Magazine of Civil Engineering]. 2014, no. 4 (48), pp. 28—38. (In Russian)
  7. Kosichenko Yu.M., Baev O.A. Protivofil’tratsionnye pokrytiya iz geosinteticheskikh materialov [Impervious Coatings Made of Geosynthetics]. Novocherkassk, RosNIIPM Publ., 2014, 239 p. (In Russian)
  8. Sol’skiy S.V., Orlova N.L. Perspektivy i problemy primeneniya v gruntovykh gidrotekhnicheskikh sooruzheniyakh sovremennykh geosinteticheskikh materialov [Prospects and Problems of Using Modern Geosynthetics]. Izvestiya VNIIG im. B.E. Vedeneeva [Proceeding of the VNIIG]. 2010, vol. 260, pp. 61—68. (In Russian)
  9. Kosichenko Yu.M., Lomakin A.V. Gibkie konstruktsii protivofil’tratsionnykh i beregoukrepitel’nykh pokrytiy s primeneniem geosinteticheskikh materialov [Flexible Structures of Impervious and Coast-Protecting Coatings Using Geosynthetics]. Izvestiya vysshikh uchebnykh zavedeniy. Severo-Kavkazskiy region. Tekhnicheskie nauki [Scientific-educational and applied Journal Izvestiya Vuzov. Severo-Kavkazskii Region]. 2012, no. 5 (168), pp. 73—79. (In Russian)
  10. Glagovskiy V.B., Sol’skiy S.V., Lopatina M.G., Dobrovskaya N.V., Orlova N.L. Geosinteticheskie materialy v gidrotekhnicheskom stroitel’stve [Geosynthetics in Hydraulic Engineering]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering]. 2014, no. 9, pp. 23—27. (In Russian)
  11. Shchedrin V.N., Kosichenko Yu.M., Mironov V.I., Ishchenko A.V., et al. Vybor effektivnoy i nadezhnoy protivofil’tratsionnoy zashchity rusel otkrytykh kanalov pri rekonstruktsii orositel’nykh sistem (rekomendatsii) [Choosing Efficient and Reliable Cut-off Wall for the Open Canal Beds during Reconstruction of Irrigation Systems (Recommendations)]. Rostov-on-Don, SKNTs VSh YuFU Publ., 2008, 68 p. (In Russian)
  12. Kosichenko Yu.M., Baev O.A. Vysokonadezhnye konstruktsii protivofil’tratsionnykh pokrytiy kanalov i vodoemov, kriterii ikh effektivnosti i nadezhnosti [Highly-Reliable Structures of Membranes for Channels and Reservoirs, their Efficiency and Reliability Criteria]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering]. 2014, no. 8, pp. 18—25. (In Russian)
  13. Shchedrin V.N., Kosichenko Yu.M., Ishchenko A.V., Baev O.A. Vysokonadezhnye konstruktsii protivofil’tratsionnykh oblitsovok kanalov i vodoemov s primeneniem innovatsionnykh materialov [Highly Reliable Structures of Seepage-control Lining of Channels and Reservoirs Using Innovative Materials]. Novocherkassk, 2013, Dep. v VINITI 13.01.2014, no. 7-V 2014, 26 p. (In Russian)
  14. Rekomendatsii po proektirovaniyu i stroitel’stvu protivofil’tratsionnykh ustroystv iz polimernykh rulonnykh materialov [Recommendations on Design and Construction of Geomembranes Made of Polymer Roll Materials]. Saint Petersburg, NII AKKh im. K.D. Pamfilova Publ., 1999, 40 p. (In Russian)
  15. Instruktsiya po proektirovaniyu i stroitel’stvu protivofil’tratsionnykh ustroystv iz polietilenovoy plenki dlya iskusstvennykh vodoemov [Specification on Design and Construction of Geomembranes Made of Polyethylene Film for Artificial Reservoirs]. Requirements SN 551—82. Moscow, Stroyizdat Publ., 1983, 40 p. (In Russian)
  16. Glebov V.D., Krichevskiy I.E., Lysenko V.P., Sudakov V.B., Tolkachev L.A. Plenochnye protivofil’tratsionnye ustroystva gidrotekhnicheskikh sooruzheniy [Film Geomembranes of Hydraulic Structures]. Moscow, Energiya Publ., 1976, 207 p. (In Russian)
  17. Lupachev O.Yu. Issledovaniya povrezhdaemosti geomembran chastitsami grunta zashchitnykh sloev [Invesrtigation of Geomambrane Damaging by Soil Particles of Protecting Layers]. Geosinteticheskie materialy v promyshlennom i gidrotekhnicheskom stroitel’stve : sbornik materialov I Mezhdunarodnoy nauchno-tekhnicheskoy konferentsii [Geosynthetics in Industrial and Hydraulic Engineering : Collection of Works of the 1st International Science and Technical Conference]. Saint Petersburg Tandem Publ., 2011, pp. 35—49. (In Russian)
  18. Gladshteyn O.I. Osobennosti primeneniya geosinteticheskikh materialov v gidrotekhnicheskom stroitel’stve [Features of Geosynthetics Use in Hydraulic Engineering]. Gidrotekhnika [Hydrotechnics]. 2009, no.1 (14), pp. 69—70. (In Russian)
  19. Kosichenko Yu.M., Baev O.A. Teoreticheskaya otsenka vodopronitsaemosti protivofil’tratsionnykh oblitsovok narushennoy sploshnosti [Theoretical Estimation of Permeability of Seepage-control Linings with the Disturbed uniformity]. Izvestiya vysshikh uchebnykh zavedeniy. Severo-Kavkazskiy region. Tekhnicheskie nauki [Scientific-educational and applied Journal Izvestiya Vuzov. Severo-Kavkazskii Region]. 2014, no. 3, pp. 6—74. (In Russian)
  20. Altunin V.S., Borodin V.A., Ganchikov V.G., Kosichenko Yu.M. Zashchitnye pokrytiya orositel’nykh kanalov [Protective Coverings of Irrigation Channels]. Moscow, Agropromizdat Publ., 1988, 158 p. (In Russian)
  21. Kosichenko Yu.M., Borodin V.A., Ishchenko A.V. Instruktsiya po raschetu vodopronitsaemosti i effektivnosti protivofil’tratsionnykh oblitsovok kanalov [Recommendations on Permeability and Efficiency Calculation of Seepage-control Linings of the Channels]. Moscow, Novocherkassk, 1984, 99 p. (In Russian)
  22. Nedriga V.P. Inzhenernaya zashchita podzemnykh vod ot zagryazneniya promyshlennymi stokami [Engineering Protection of Underground Waters from Industrial Waste Pollution]. Moscow, Stroyizdat Publ., 1976, 95 p. (In Russian)
  23. Ishchenko A.V. Gidravlicheskaya model’ vodopronitsaemosti i effektivnosti protivofil’tratsionnykh oblitsovok krupnykh kanalov [Hydraulic Model of Permeability and Efficiency of Seepage-control Linings of Big Channels]. Izvestiya VNIIG im. B.E. Vedeneeva [Proceeding of the VNIIG]. 2010, vol. 258, pp. 51—64. (In Russian)
  24. Kosichenko Yu.M., Baev O.A. Matematicheskoe i fizicheskoe modelirovanie fil’tratsii cherez malye povrezhdeniya protivofil’tratsionnykh ustroystv iz polimernykh geomembran [Mathematical and Physical Modelling of Filtration through Small Damages of Impervious Devices Made of Polymer Geomembranes]. Izvestiya VNIIG im. B.E. Vedeneeva [Proceeding of the VNIIG]. 2014, vol. 274, pp. 60—74. (In Russian)
  25. Ishchenko A.V. Sklyarenko E.O. Konstruktivnye skhemy protivofil’tratsionnoy zashchity nakopiteley otkhodov i fil’tratsionnye raschety ikh effektivnosti [Structural Schemes of Impervious Protection of Waste Deposits]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering]. 2007, no. 3, pp. 21—25. (In Russian)

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Hydrogeological model of the territory of Kowsar hydraulic project

Vestnik MGSU 3/2015
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Khokhotva Sergey Nikolaevich - Moscow branch of ENEX Deputy Head, Centre of Hydraulic Structures Safety, Moscow branch of ENEX, 13 Vol’naya str., Moscow, 105118, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 59-68

Mathematical hydrogeology model of the territory of Kowsar Project was created with account for the results of the engineering surveys and hydro geological monitoring, which was conducted in the process of Kowsar Project construction. In order to create the model in the present work a universal computer system Ansys was used, which implements the finite element method and solid modeling technology, allowing to solve the filtration problem with the use of thermal analogy. The three-dimensional geometric model was built with use of the principle “hard body” modeling, which displays the main line of the territory relief, including the created water reservoir, geological structure (anticline Duk) and the main lithological complexes developed within the territory. In the limestone mass As here is a zone characterized by water permeability on territory of Kowsar Project, and a layer characterized by seepage feeding, which occurs outside the considered territory. The water reservoir is a source of the change of hydro geological situation. The results of field observations witness, that the levels of underground waters within the area of the main structures reacts almost instantly on the water level change in the water reservoir; the delay period of levels change is not more than 1,5…2,0 weeks at maximum distance from the water reservoir. These particularities of the hydro geological regime allow using the steady-state scheme of the decision of forecast problems. The mass of limestone As, containing the structures of the Kowsar Project, is not homogeneous and anisotropy in its seepage characteristics. The heterogeneity is conditioned by exogenous influence on the mass up to the depth of 100…150 m. The seepage anisotropy of the mass is expressed by the difference of water permeability of the mass along and across the layers for almost one order. The structures of Kowsar Project is presented by a dam, grouting curtain on axis of the dam and consolidation curtain in its both banks, drainage structures. Underground waters of the territory are formed by infiltration. They unload in river Heirabad. In accordance with this circumstance, the northwest (the right bank) and the south-east (the left bank) hydro geological borders of the model are the borders with constant discharge seepage, entering from the area of the feeding in the area of unloading. The borders are distanced from the river on 2,5 km. In accordance with the regional direction of the flow of underground waters, the model is limited along the lines of the current (the impervious borders) at northeast (upwards on river) and south-west (down on river). Those borders are distanced from river on 2,2…2,3 km. As a result, the area of model is 28 km
2. Aroofing of almost watertight marls of the retinue Pb is the bottom border of the model. Theinternal borders are presented by the river Heirabad, the water reservoir and the drainage structures. The calibration of the model was conducted at the reservoir water mark of 580 m and 606…610 m. The correctness criterion of the decision had shown the convergence of the obtained values of discharge level of underground waters with the data of natural observations. In the process of calibration the revision of the input data was carried out - a seepage characteristic of thick limestone mass As and discharge, entering from the right and left bank borders of the model. The forecast calculation was performed for water reservoir level of 620 m. The creation of water reservoir has influenced the seepage regime of the territory by the area of more than 25 km
2. As a result of the buttress of the natural inflow there occurred the redistribution of the natural inflow and change of the direction of the natural inflow that has caused the appearance of springs in downstream of dam near the contact of the series As-Gs. The design inflow of underground waters in the river Heirabad on the area from dam up to the contact of the suites As and Gs in downstream is 2,4…2,6 m
3/s including springs. The share of the direct seepage from water reservoir forms ~40 % of this values, the rest 60 % correspond to the unload natural inflow redistributed as a result of buttress. It is possible to define the level and discharges of underground waters on the territory of hydro unit under any elevation of water reservoir with the help of the created geo seepage model. The model can be used for effectiveness evaluation of the grouting curtain in the operation period.

DOI: 10.22227/1997-0935.2015.3.59-68

References
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FEATURES OF PERMEABILITY CALCULATION FOR CONCRETE-LINED FACING WITH SEALED SEAMS TAKING INTO ACCOUNT THE GROUND PERMEABILITY

Vestnik MGSU 5/2018 Volume 13
  • Kosichenko Yuriy Mikhaylovich - Russian Scientific Research Institute of Land Improvement Problems (RSRILIP) Doctor of Technical Sciences, Professor, Chief Scientific Officer, Russian Scientific Research Institute of Land Improvement Problems (RSRILIP), 190 Baklanovskiy, Novocherkassk, Rostov oblast, 346400, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Baev Oleg Andreevich - Russian Scientific Research Institute of Land Improvement Problems (RSRILIP) Candidate of Technical Sciences, Senior Researcher, Russian Scientific Research Institute of Land Improvement Problems (RSRILIP), 190 Baklanovskiy, Novocherkassk, Rostov oblast, 346400, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Garbuz Aleksandr Yur’evich - Russian Scientific Research Institute of Land Improvement Problems (RSRILIP) Postgraduate Student, Junior Researcher, Russian Scientific Research Institute of Land Improvement Problems (RSRILIP), 190 Baklanovskiy, Novocherkassk, Rostov oblast, 346400, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 633-642

Subject: calculation of filtration through concrete-lined facings with the subsequent construction of diagrams of excess pressure when sealing the seams. The considered case of water permeability of the sealed seam of the facing refers to a two-layer medium with a sealed screen and an underlying base in which three types of excess pressure diagrams can be formed depending on the ratio of the filtration coefficient of the ground-soil to that of the sealed layer. Research objectives: investigation of cases of water permeability of the sealed seam of the facing in a two-layer medium where the top layer constitutes a sealed screen of soil in which three types of excess pressure diagrams can be formed depending on the ratio of the filtration coefficient of the ground-soil to that of the sealed layer. Materials and methods: dependencies of specific flow through the sealed seam are considered. Results: for the analyzed cases of water permeability of the sealed seam, it was established that for the ratio of ground soil filtration coefficient to that of the sealed layer the following values are obtained: 1) when , the excess pressure would be positive and the filtration in the foundation would proceed with complete saturation of pores with water; 2) when , the diagram corresponds to such a degree of seam sealing, at which the excess pressure at its base falls to zero; 3) when , there is a negative excess pressure (i.e., vacuum), and the filtration with full pore saturation transitions to motion with partial saturation of pores. Conclusions: The obtained value of the speed of spreading of seepage flow under the sealed seam in the first case when is (1.0> 0.274 m/day), in the second case when - (1.0 ≅ 1.02 m/day), and in the third case, when - (1.0 < 2.48 m/day). These data confirm the nature of the filtration process in the ground-soil under the seam: in the first case - with complete saturation of pores, in the second case, there is a boundary with the transition from complete saturation of the soil to partially saturated soil, and in the third case - with partial saturation of the ground-soil, which corresponds to previously established concepts of filtration nature for infiltration basins.

DOI: 10.22227/1997-0935.2018.5.633-642

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