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BEDDINGS AND FOUNDATIONS, SUBTERRANEAN STRUCTURES. SOIL MECHANICS

Experimental evaluation of drainage filters sealing in peat soils

Вестник МГСУ 2/2014
  • Nevzorov Aleksandr Leonidovich - Northern (Arctic) Federal University named after M.V. Lomonosov (SAFU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology, Bases and Foundations, Northern (Arctic) Federal University named after M.V. Lomonosov (SAFU), 17 Severnaya Dvina Emb., Arkhangelsk, 163002, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Zaborskaya Ol'ga Mikhaylovna - Northern (Arctic) Federal University named after M.V. Lomonosov (SAFU) Senior Lecturer, Department of Structural Mechanics and Strength of Materials, Northern (Arctic) Federal University named after M.V. Lomonosov (SAFU), 17 Severnaya Dvina Emb., Arkhangelsk, 163002, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Nikitin Andrey Viktorovich - Northern (Arctic) Federal University named after M.V. Lomonosov (SAFU) Candidate of Technical Sciences, Associate Professor, Department of Enginee, Northern (Arctic) Federal University named after M.V. Lomonosov (SAFU), 17 Severnaya Dvina Emb., Arkhangelsk, 163002, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Страницы 84-90

The article deals with research results of the sealing of pores in drainage filters by organic particles. Permeability tests were carried out with the constant gradient 1.5. The water flow through the sample of soil was top-down.The tests were carried out with 2 types of samples: the first part of samples had layers (from up to down) 300 mm peat and 2 layers of geotextile, the second part consisted of 250 mm peat, 200 mm fine sand and 2 layers of geotextile. Well decomposed peatsamples were used. Peat had the following characteristics: density is 1,05...1,06 g/cm3, specific density — 1,53...1,56 g/cm3, void ratio — 12,0...12,5. The duration of each test was 15 days. During testing the hydraulic conductivity of samples was decreased by 1.3...1.9.After completing the tests the hydraulic conductivity of sand and geotextile were measured. The content of organic matter in geotextile and fine sand was determined as well. Dry mass of organic matter in the first layer of geotextile in the first type of samples were 1,0…1,3 g per 75 cm2. The organic matter in the second layer of geotextile in the first type of samples and in the first layer of geotextile in the second type wasn’t exposed. Fine sands protected the drainage geotextile as a result of sealing of pore space of sands by organic matter.

DOI: 10.22227/1997-0935.2014.2.84-90

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