Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pore pressure measurements during freezing of an overconsolidated clayey silt
AbstractFrost heave tests on overconsolidated clayey silt specimens have been conducted with and without applied back-pressure. Frost heave characteristics are, at first approximation, independent upon the magnitude of applied back-pressure provided that the unfrozen soil remains saturated. For the soil studied the critical suction at which desaturation occurs is about 40 kPa. Pore pressures were also measured in the unfrozen soil during freezing. The experimental results confirm steady state flow conditions in overconsolidated soil specimen seven during the early stage of freezing. However, suctions in excess of 100 kPa can be generated at the frost front depending upon the freezing conditions. This, in turn, may lead to desaturation of the unfrozen soil near the frost front and render the analysis of a frost heave test even more complex. It is suggested to conduct frost heave test using a back-pressure equal to the hydrostatic pressure in the field and with a value of suction at the frost front close to that in the field in order to assess the relevant segregation potential.
Pore pressure measurements during freezing of an overconsolidated clayey silt
AbstractFrost heave tests on overconsolidated clayey silt specimens have been conducted with and without applied back-pressure. Frost heave characteristics are, at first approximation, independent upon the magnitude of applied back-pressure provided that the unfrozen soil remains saturated. For the soil studied the critical suction at which desaturation occurs is about 40 kPa. Pore pressures were also measured in the unfrozen soil during freezing. The experimental results confirm steady state flow conditions in overconsolidated soil specimen seven during the early stage of freezing. However, suctions in excess of 100 kPa can be generated at the frost front depending upon the freezing conditions. This, in turn, may lead to desaturation of the unfrozen soil near the frost front and render the analysis of a frost heave test even more complex. It is suggested to conduct frost heave test using a back-pressure equal to the hydrostatic pressure in the field and with a value of suction at the frost front close to that in the field in order to assess the relevant segregation potential.
Pore pressure measurements during freezing of an overconsolidated clayey silt
Seto, J.T.C. (Autor:in) / Konrad, J.-M. (Autor:in)
Cold Regions, Science and Technology ; 22 ; 319-338
03.07.1993
20 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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