Embankments are often built on formations that can develop voids during their lifetime. This causes problems for local communities, businesses and infrastructure network.
The use of high-strength geosynthetics to mitigate the consequences of unexpected collapse or subsidence proved to be an attractive solution to the problem. Instead of traditional solutions such as reinforced concrete capping, high strength geosynthetics could offer considerable technical and economic benefits in spanning potential void features, mitigating risks and protecting assets.
This solution of bridging voids with high strength geosynthetics is not new; it has been used since the been used since the 1970s. But it’s a niche application in the sense that not many contractors, engineering firms, or projects that would consider this as a as a sustainable way of stabilising a shaft.
Uncoated geogrid or geotextiles could suffer a reduction in strength due to pH or installation damage. Hence why it is always recommended for these types of applications to rely on material extensively tested and certified by independent national authorities or institution for the specific application.