During winter the formation of ice lenses causes frost heave within frost-susceptible materials. The uneven spatial distribution of heave due to heterogeneity results in severe damage to the pavement. Fissures are created, favoring excess infiltration, especially during subsequent springtime thaw. The installation of drainage can be beneficial in reducing the amount of water present in road foundations. Some uncertainty, however, exists about the sources of water feeding the lenses and, therefore, the optimal location of the systems. To assess the efficiencies of deep lateral drainage systems, a full-scale test has been undertaken along an existing road constructed on a glacial till subgrade. Three 150-m-long vertical geocomposite systems were installed at depths ranging between 2 and 3 m. In situ monitoring included piezometers and frost indicators and measurements of flow rates and pavement heave. To obtain a point of comparison, the measurements started 1 year before drain installation. For the period of observation the freezing indexes ranged between 1432°C-day and 1558°C-day, and the maximum frost penetration was 2.5 m. The flow rates varied considerably with the seasons, ranging between 1 ml/sec/linear meter during winter and 10 ml/sec/m during the April thaw. Before drainage the heave values ranged between 50 and 150 mm. After installation they were reduced by a factor ranging between 10 and 50 percent.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Efficiency of Geosynthetic Lateral Drainage in Northern Climates


    Additional title:

    Transportation Research Record


    Contributors:
    Lafleur, Jean (author) / Savard, Y. (author)


    Publication date :

    1996-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Efficiency of Geosynthetic Lateral Drainage in Northern Climates

    Lafleur, Jean / Savard, Y. | Transportation Research Record | 1996



    Field performance of geosynthetic highway drainage systems

    Koerner, G.R. / Koerner, R.M. / Wilson-Fahmy, R.F. | Tema Archive | 1996



    Geosynthetic-Reinforced Soil Walls

    Crouse, Phillip E. / Wu, Jonathan T. H. | Transportation Research Record | 2003