Based on cyclic plate load and moving wheel tests Pokharel (2010) proposed a design method for unpaved roads using Neoloy based Geocell with a theoretical base from the Giroud and Han (2004) design method for planar reinforcement. To validate it under real time traffic, unpaved haul roads, well pads, and logging yards were designed. To the possible extent locally available cheaper poorly graded but environmentally friendly materials were used as infill. In case of extremely soft subgrades, construction layer of poorly graded sand reinforced with Geocell provided a driving surface for the construction equipment. The performance of the structures was evaluated on the rutting criteria, maintenance requirement, and visual serviceability after one year of service. This paper discusses the design method used in a number of projects in Western Canada including the Oil Sands region that face extreme cold weather conditions. The limitations of the design method are also discussed. The eight real time test cases considered for this paper showed that the design formula worked well within and beyond the laboratory and moving wheel test limits set out by Pokharel, 2010. In some cases the design seemed to perform better than that predicted by design. This can be partly attributed to the improvement imparted by the construction layers especially in terms of the CBR value. In all the double layer cases the construction or the bottom layer improved the subgrade so that the subgrade strength used in the design produced design with bigger margin of safety. In conclusion the design method applied first time in the real application proved valid and reliable. There are however, space for improvement in the design calculations and more accurate monitoring of the structure performance. This design method was originally developed and tested for Neoloy based Geocells and the validation done in this paper is also valid for the same type of Geocell only.


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    Titel :

    Validation of Geocell Design for Unpaved Roads


    Beteiligte:
    Pokharel, Sanat Kumar (Autor:in) / Martin, Ian (Autor:in) / Norouzi, Meisam (Autor:in) / Breault, Marc (Autor:in)


    Erscheinungsdatum :

    2015


    Format / Umfang :

    9 Seiten, Bilder, Tabellen, Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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