Effect of changes in matric suction on slope stability in natural unsaturated soil
Samo za registrovane korisnike
2015
Konferencijski prilog (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Stability analyses were performed for a real engineering-geological cross-section of unsaturated Quaternary silt sediments. Unsaturated shear strength is a function of the two stress variables: net normal stress and matric suction. Constitutive equations (unsaturated shear strength - matric suction) and (angle ∝b - matric suction) were defined for these silty soils. These equations were established on the basis of primary constitutive relationships for unsaturated soils by soil-water characteristic curves (effective degree of saturation - matric suction). Soil-water characteristic curves were obtained from results of experimental tests on draining saturated soil samples under different pressures, performed for the first time in Serbia, in a 15 bar pressure plate extractor, according ASTM. Effective shear strength parameters c' and ∝' were also experimentally obtained from direct shear tests. Stability analyses were performed using the GLE method for different climate conditions, before... and after rainfall, i.e. for different values of matric suction. Stability analyses were performed for the same groundwater level, too. It was confirmed that rainfall decreases the angle (pb and stability of natural unsaturated soil slopes. Decreasing the ∝b angle of unsaturated soil, due to rainfall, decreases the safety factor of the slope faster for coarse-grained soil than for finegrained soil.
Izvor:
Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Confer, 2015, 4, 1561-1566Izdavač:
- ICE Publishing
Institucija/grupa
Institut za ispitivanje materijalaTY - CONF AU - Hadži-Niković, Gordana AU - Rakić, Dragoslav AU - Đoković, Ksenija PY - 2015 UR - http://rims.institutims.rs/handle/123456789/264 AB - Stability analyses were performed for a real engineering-geological cross-section of unsaturated Quaternary silt sediments. Unsaturated shear strength is a function of the two stress variables: net normal stress and matric suction. Constitutive equations (unsaturated shear strength - matric suction) and (angle ∝b - matric suction) were defined for these silty soils. These equations were established on the basis of primary constitutive relationships for unsaturated soils by soil-water characteristic curves (effective degree of saturation - matric suction). Soil-water characteristic curves were obtained from results of experimental tests on draining saturated soil samples under different pressures, performed for the first time in Serbia, in a 15 bar pressure plate extractor, according ASTM. Effective shear strength parameters c' and ∝' were also experimentally obtained from direct shear tests. Stability analyses were performed using the GLE method for different climate conditions, before and after rainfall, i.e. for different values of matric suction. Stability analyses were performed for the same groundwater level, too. It was confirmed that rainfall decreases the angle (pb and stability of natural unsaturated soil slopes. Decreasing the ∝b angle of unsaturated soil, due to rainfall, decreases the safety factor of the slope faster for coarse-grained soil than for finegrained soil. PB - ICE Publishing C3 - Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Confer T1 - Effect of changes in matric suction on slope stability in natural unsaturated soil EP - 1566 SP - 1561 VL - 4 UR - https://hdl.handle.net/21.15107/rcub_rims_264 ER -
@conference{ author = "Hadži-Niković, Gordana and Rakić, Dragoslav and Đoković, Ksenija", year = "2015", abstract = "Stability analyses were performed for a real engineering-geological cross-section of unsaturated Quaternary silt sediments. Unsaturated shear strength is a function of the two stress variables: net normal stress and matric suction. Constitutive equations (unsaturated shear strength - matric suction) and (angle ∝b - matric suction) were defined for these silty soils. These equations were established on the basis of primary constitutive relationships for unsaturated soils by soil-water characteristic curves (effective degree of saturation - matric suction). Soil-water characteristic curves were obtained from results of experimental tests on draining saturated soil samples under different pressures, performed for the first time in Serbia, in a 15 bar pressure plate extractor, according ASTM. Effective shear strength parameters c' and ∝' were also experimentally obtained from direct shear tests. Stability analyses were performed using the GLE method for different climate conditions, before and after rainfall, i.e. for different values of matric suction. Stability analyses were performed for the same groundwater level, too. It was confirmed that rainfall decreases the angle (pb and stability of natural unsaturated soil slopes. Decreasing the ∝b angle of unsaturated soil, due to rainfall, decreases the safety factor of the slope faster for coarse-grained soil than for finegrained soil.", publisher = "ICE Publishing", journal = "Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Confer", title = "Effect of changes in matric suction on slope stability in natural unsaturated soil", pages = "1566-1561", volume = "4", url = "https://hdl.handle.net/21.15107/rcub_rims_264" }
Hadži-Niković, G., Rakić, D.,& Đoković, K.. (2015). Effect of changes in matric suction on slope stability in natural unsaturated soil. in Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Confer ICE Publishing., 4, 1561-1566. https://hdl.handle.net/21.15107/rcub_rims_264
Hadži-Niković G, Rakić D, Đoković K. Effect of changes in matric suction on slope stability in natural unsaturated soil. in Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Confer. 2015;4:1561-1566. https://hdl.handle.net/21.15107/rcub_rims_264 .
Hadži-Niković, Gordana, Rakić, Dragoslav, Đoković, Ksenija, "Effect of changes in matric suction on slope stability in natural unsaturated soil" in Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Confer, 4 (2015):1561-1566, https://hdl.handle.net/21.15107/rcub_rims_264 .