Use of geosynthetics for performance enhancement of earth structures in cold regions

摘要: Earth structures, such as roadways, embankments and slopes, earth retaining walls, have been commonly used in cold regions for transportation other applications. In addition to typical design considerations structures at normal temperature, a must also consider the unique problems associated with low frost heave, lateral expansion, thaw settlement weakening, degradation of material properties. Geosynthetics stabilize during construction mitigate potential their service temperature. This paper provides state practice review use geosynthetics performance enhancement regions. starts basic information on available geosynthetic products functions, evaluates properties behavior soil-geosynthetic systems discusses past studies key results enhance embankments, walls reveals that temperature higher tensile strength stiffness, lower creep rate, elongation failure. The effect becomes significant when nonwoven geotextiles are subjected moistening soil intrusion subfreezing Freeze-thaw cycles may degrade hydraulic mechanical geosynthetic-soil systems. inclusion drainage and/or barrier water flow, retains properties, reduces heave after freeze-thaw cycles. Effectiveness has confirmed field bridging over voids, stabilizing roadways temperature-susceptible soils thaw, proving before freeze. To avoid expansion backfill granular fill without fines should be used. When is additional pressure induced by freeze considered design.