When you have to build embankments over weak foundation soils which are too deep to viably excavate and you can’t afford any significant settlement – such as adjacent to sensitive structures – the embankments usually need to be constructed over a deep foundation using piles or vibro concrete columns (VCCs) bearing on firmer strata below. Traditionally, expensive concrete rafts have been used to distribute the load evenly onto the piles – but usually the most economic solution is to construct a Load Transfer Platform (LTP).
How Tensar geogrids and Basetex can help
There are two types of design approach available for an LTP: Tensioned Membrane and the TensarTech Plateau. The Tensioned Membrane Load Transfer Platform is designed so the embankment is supported directly by two orthogonal layers of high strength Tensar Basetex geotextile spanning in catenary between the pile heads, and can use poorer quality fill. A TensarTech Plateau uses an enhanced arch mechanism developed within a granular mattress reinforced with layers of Tensar LTP geogrids to distribute load into the piles of VCC’s below.