A qualitative model study on the effect of geosynthetic foundation reinforcement in sand overlying very soft clay

B. R Jones, S.W Jacobs and J.L van Rooy 2016.

Journal of the south African Insitution of Civil Engineering, vol 58(2).

A centrifuge model study was carried out investigating the effects of the inclusion of geogrid reinforcement in a sand layer constructed over a thin, very soft clay layer to facilitate the construction of warehouse floors supporting product stockpiles. The use of geogrid reinforcement allowed larger surcharge loads to be applied for a given amount of settlement by allowing load to be spread over the footprint area of the geogrid due to the tension membrane effect and its associated benefits. A lower-bound calculation of the load at which the tensile reinforcement starts to function is presented.





Geosynthetic Reinforcement and    

Foundations in Clays and Sands

Deformation observed in soil is the result of both compressive and tensile strains, which usually develop when soil shears (Jewell 1996). However, when reinforcement is placed in soil it can develop bond through frictional contact between the soil particles and the planar surface areas of the reinforcement, and from bearing stresses on transverse surfaces that exist in geogrids or ribbed strips (Jewell 1996)

Key Words: 

Centrifuge modelling, soft clay, geogrid, reinforced sand.