Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Frost Heave and Polystyrene Insulation at a Canal Drop Structure
During two winter seasons, an investigation was conducted on the Riverton Project in central Wyoming where frost heave has caused damage to concrete canal structures. The test site was at an existing rectangular, inclined concrete drop structure which heaved uniformly as a unit a maximum of 25 mm. The air temperatures during both winters were slightly colder than normal and the snow cover was intermittent and very light. The foundation was a borderline clayey sand-lean clay and the water table fluctuated near the bottom of the structure. Subsurface temperatures were measured by a thermocouple system and frost penetration with liquid-filled frost gages. Frost penetrated about 600 mm below the 150-mm-thick concrete floor of the chute. In areas adjacent to the drop, frost penetrated about 1000 mm below the uninsulated ground surface, about 150 mm below the 25-mm-thick polystyrene insulation with 150 mm of loose soil cover, and not at all below the 50-mm-thick polystyrene insulation with 150 mm of loose soil cover.
Frost Heave and Polystyrene Insulation at a Canal Drop Structure
During two winter seasons, an investigation was conducted on the Riverton Project in central Wyoming where frost heave has caused damage to concrete canal structures. The test site was at an existing rectangular, inclined concrete drop structure which heaved uniformly as a unit a maximum of 25 mm. The air temperatures during both winters were slightly colder than normal and the snow cover was intermittent and very light. The foundation was a borderline clayey sand-lean clay and the water table fluctuated near the bottom of the structure. Subsurface temperatures were measured by a thermocouple system and frost penetration with liquid-filled frost gages. Frost penetrated about 600 mm below the 150-mm-thick concrete floor of the chute. In areas adjacent to the drop, frost penetrated about 1000 mm below the uninsulated ground surface, about 150 mm below the 25-mm-thick polystyrene insulation with 150 mm of loose soil cover, and not at all below the 50-mm-thick polystyrene insulation with 150 mm of loose soil cover.
Frost Heave and Polystyrene Insulation at a Canal Drop Structure
C. W. Jones (Autor:in)
1978
39 pages
Report
Keine Angabe
Englisch
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