BEDDINGS AND FOUNDATIONS, SUBTERRANEAN STRUCTURES. SOIL MECHANICS

THE ROLE OF THE "DENSITY - MOISTURE" OF SANDY SOILS IN FORMATION OF EFFICIENT STRESSES FROM THE PERSPECTIVE OF THE PHYSICOCHEMICAL THEORY

Vestnik MGSU 12/2012
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology and Geoecology, 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 .
  • Potapov Ivan Aleksandrovich - Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy engineer, Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy, ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shimenkova Anastasiya Anatol'evna - Moscow State University of Civil Engineering (MGSU) engineer, Department of Engineering Geology and Geoecology, 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 .

Pages 104 - 110

The paper deals with the formation of limiting bulk densities of sandy soils of different origin against different values of humidity and varying structural features. The authors have identified that the optimum moisture content is typical for sands and clays exposed to mechanical compaction. The nature of this dependence is different from the one between the density and humidity of clay soils. These differences are driven by the peculiarities of formation of bound water shells in the event of low humidity. A linear dependence between the optimal humidity of sands and maximal molecular moisture capacity has been identified. The authors make a statement based on the proven de
pendence between the maximal molecular moisture capacity and the morphology of sands. Their statement is that the formation of bound water shells in the low humidity environment is dependent not only on the fineness of particles, but, to a higher extent, on the peculiarities of the shape and the nature of the surface of sand grains. Another important factor of impact on the density of sandy soils in the natural environment consists in their humidity.
Multiple researchers believe that the correlation between density and humidity of sands is to be the subject of research. It is noteworthy that limit densities of air-dried sands are to be assessed. Therefore, any sands have some particular bound water content, and the lower the intensity of treatment of sand particles, the higher the water content. The findings demonstrate that in most cases typical coagulatory and transitory contacts of non-saturated sands are to be considered in line with the ideas expressed by V.I. Osipov, as the above contacts determine the formation of effective stresses from the prospective of the physicochemical theory.

DOI: 10.22227/1997-0935.2012.12.104 - 110

References
  1. Osipov V.I. Fiziko-khimicheskaya teoriya effektivnykh napryazheniy v gruntakh [Physicochemical Theory of Effective Stresses in Soils]. IGE RAN [Institute of Geo-ecology of the Russian Academy of Sciences]. Moscow, IFZ RAN [Institute of Physics of the Earth (IPE)], 2012, 74 p.
  2. Potapov A.D., Potapov I.A., Shimenkova A.A. Nekotorye aspekty primenimosti k peschanym gruntam polozheniy fi ziko-khimicheskoy teorii effektivnykh napryazheniy [Particular Aspects of Applicability of Provisions of the Physical and Chemical Theory of Effective Stresses to Sandy Soils]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 10, pp. 229—239.
  3. Potapov I.A., Potapov A.D., Shimenkova A.A. Formirovanie raznykh tipov energeticheskikh kontaktov v peschanykh gruntakh v aspekte fi ziko-khimicheskoy teorii effektivnykh napryazheniy [Formation of Different Types of Energy Contacts in Sandy Soils in the Framework of the Physicochemical Theory of Effective Stresses]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 11, pp. 210—218.
  4. Potapov I.A., Shimenkova A.A., Potapov A.D. Zavisimost’ suffozionnoy ustoychivosti peschanykh gruntov razlichnogo genezisa ot tipa fi l’trata [Dependence of Suffosion Stability of Sandy Soils of Various Geneses on the Type of Filtrate]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 5, pp. 79—86.
  5. Potapov A.D. Morfologicheskoe izuchenie peskov razlichnogo genezisa v inzhenerno-geologicheskikh tselyakh [Morphological Research of Sands of Various Geneses for Engineering Geology Purposes]. Moscow, PNIIIS [Production, Scientific and Research Institute of Engineering Surveying in Construction], 1982, 243 p.
  6. Dudler I.V. Znachenie ponyatiya «plotnost’ — vlazhnost’» dlya izucheniya i otsenki fi ziko-mekhanicheskikh svoystv peschanykh gruntov [Meaning of the Notion of “Density-Humidity” in the Mastering and Assessment of Physical-mechanical Properties of Sandy Soils]. Voprosy inzhenernoy geologii [Issues of Engineering Geology]. Moscow, MISI Publ., 1977, 7 p.
  7. Anan’ev V.P., Potapov A.D. Inzhenernaya geologiya [Engineering Geology]. Moscow, Vyssh. shk. publ., 2008, 260 p.
  8. Lysenko M.P. Sostav i fiziko-mekhanicheskie svoystva gruntov [Composition and Physical-Mechanical Properties of Soils]. Moscow, Nedra Publ., 1972, 272 p.
  9. Kabai J. The Compatibility of Sands and Sandy Gravels. Techn. University Budapest. 1968, vol. 63, 6 p.
  10. Trofimov V.T., editor. Gruntovedenie [Soil Science]. Moscow, Nauka Publ., 2005, 1024 p.

Download

Results 1 - 1 of 1