Green Terramesh-based containment reinforces the soil and enables the plant integration of vegetation.
The Sao Paulo Catarina Executive Airport is one of the three commercial airports serving San Paulo in Brazil. Currently, it finds itself in the final earthworks stage and will soon enter the building construction stage. Project engineers had to find a solution that facilitates the containment of a slope in a landfill in the western head of the runway in order to proceed with the project.
Reducing the runway platform was deemed not viable, as the initial plan had been submitted to the evaluation of the National Civil Aviation Agency (ANAC). Maccaferri’s Green Terramesh solution was thus chosen to strengthen the soil by using geosynthetics. This unique solution is an environmentally friendly modular system used to form vegetated (green) faced soil reinforced slopes (also known as Mechanically Stabilised Earth) and embankments. It has been used globally on some of the most significant infrastructure schemes. On taller slopes and structures, it can also be used along with our high-performance primary geogrids, ParaLink, ParaGrid, and MacGrid WG.
The angled front face and the erosion control blanket of the Green Terramesh enables the establishment of the natural vegetation of the units. The Green Terramesh unit consists of pre-fabricated components of double-twisted wire mesh (8×10 type), lined with an erosion-control blanket and stiffened with a welded mesh panel to speed up the construction process. The Terramesh systems has proven high performance (displacements and deformations) in reinforced soil structures of this site, providing reassurance to the client.
The technical proposal was prepared for the Retaining walls & soil reinforcement structures based on topographical surveys, ground investigations and soil reports. During construction, instrumentation was installed to provide feedback and verification on the performance of the structure in-use and included both performance of the soil reinforcement elements, but the dimensional control of the structure.
At the heart of the Green Terramesh unit is a single piece of double twisting steel wire hexagonal mesh which forms the soil reinforcement geogrid, the front face and the upper return; no connections are needed between the geogrid and the facing system. The steel mesh is coated in a GalMac zinc-aluminium alloy with a polymer coating to deliver a long design life. On taller structures, Maccaferri’s polymer geogrids, MacGrid WG, Paragrid and Paralink are used as primary soil reinforcement within these structures.
For more information about Maccaferri’s Green Terramesh please contact us.