12-11-2014, 04:33 PM
Abstracts: Reinforced Soil structures may be defined as a composite earth structure wherein soils are internally stabilized by the inclusion of discrete layers of reinforcement materials which are generally placed horizontally, between successive lifts of fill during construction. Today different forms of soil reinforcement (steel strips, bar mats, welded mesh, geogrids, geotextiles etc.) are combined with different types of facings (full-height panels, discrete panels, segmental panels, modular blocks, gabions, wrap-around etc.) for the construction of a amazing variety of reinforced soil walls and steep slopes. Thus reinforced soil is a proven and mature technology which is almost forty years old and requirements for successful practice are well-understood and established in several codes of practice. In present study an attempt has been made to design Reinforced Soil Retaining walls using geogrids and segmental blocks. Geogrid Reinforced Soil Wall consists of geogrid as the main reinforcement which is connected to the facing through a loop and toggle arrangement to ensure 100 % connection strength. The facing is made up of thin panels of lightly reinforced concrete which can be cast in a variety of shapes and finishes to get the desired aesthetics. Geogrids are commonly made polymer materials, such as polyester, polyethylene or polypropylene. They may be woven or knitted from yarns, heat-welded from strips of material or produced by punching a regular pattern of holes in sheets of material, then stretched into a grid. For reinforced soil wall design we will use BS 8006: 1995 - Code of practice for strengthened/reinforced soils and other fills. Also FHWA-NHI-00-043 - Mechanically stabilized earth walls and reinforced soil slopes design and construction guidelines.