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Separation and filtration of soils using geotextiles in dynamic laboratory tests
Dynamic loading laboratory tests have been conducted on soil-geotextile systems to evaluate the effectiveness of geotextiles used as filter layers in pavement structures. Factors that affect the performance of the geotextiles include the fabric type, soil type and gradation, and the pore pressures that develop in the subgrade. The tests are being conducted on two woven and two nonwoven fabrics in combination with a silty sand and an elastic silt. The soil-geotextile system is prepared in a 25.4 cm diameter mold and is loaded dynamically at a stress of approximately 69 kPa at a rate of 3 Hz for 12 hours. Pore pressures at three depths in the soil are measured via transducers located in the wall of the mold. The pore pressures that develop in the soil due to the applied dynamic load dissipate with time as a result of dynamic consolidation. Due to the induced hydraulic gradient in the soil, water and fine-grained soil are carried upward to the soil-geotextile interface which is a drainage boundary. Water flows through the geotextile, and depending on the soil particle size and the opening size of the geotextile, suspended soil particles may also migrate through the fabric.
Separation and filtration of soils using geotextiles in dynamic laboratory tests
Dynamic loading laboratory tests have been conducted on soil-geotextile systems to evaluate the effectiveness of geotextiles used as filter layers in pavement structures. Factors that affect the performance of the geotextiles include the fabric type, soil type and gradation, and the pore pressures that develop in the subgrade. The tests are being conducted on two woven and two nonwoven fabrics in combination with a silty sand and an elastic silt. The soil-geotextile system is prepared in a 25.4 cm diameter mold and is loaded dynamically at a stress of approximately 69 kPa at a rate of 3 Hz for 12 hours. Pore pressures at three depths in the soil are measured via transducers located in the wall of the mold. The pore pressures that develop in the soil due to the applied dynamic load dissipate with time as a result of dynamic consolidation. Due to the induced hydraulic gradient in the soil, water and fine-grained soil are carried upward to the soil-geotextile interface which is a drainage boundary. Water flows through the geotextile, and depending on the soil particle size and the opening size of the geotextile, suspended soil particles may also migrate through the fabric.
Separation and filtration of soils using geotextiles in dynamic laboratory tests
Perkins, K.E. (author) / Brandon, T.L. (author)
1998
18 Seiten, 15 Quellen
Conference paper
English
Separation and Filtration of Soils Using Geotextiles in Dynamic Laboratory Tests
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