PROJECTS
The entire platform was compacted and stabilised .
In addition to the separation and basal reinforcement , a drainage system of 1.6km long was installed alongside the stormwater trench to protect the integrity of the platforms . The drainage system is Kaytech ’ s solution for highly effective subsoil drainage in a wide variety of applications . Compared to a conventional aggregate drain , the pre-assembled and lightweight system offers several advantages , including ease of transportation , ease and speed of installation , flexibility , as well as quality assurance .
Kaypipe geopipe , positioned at the base of the system fin , accommodates high localised flows because its 70 % open area allows for a significant increase in the infiltration rate of water . Manufactured from HDPE , Kaypipe geopipe is lightweight and flexible , making it easier to install than other drainage pipes . The pipes have an efficient infiltration rate and can tolerate levels of extreme stress .
For optimum subgrade stabilisation of the platform created for the mall , Kaytech recommended a combination of a geogrid and a continuous filament non-woven needle punched geotextile . The geogrid provides a mechanical stabilised layer and the geotextile beneath fulfils the separation function to the soft clayey subgrade . This creates a stable platform for the building .
The geogrid enables greater reduction in aggregate layer thickness which in turn , reduces the quantity of natural aggregates required as well as the volume of material to be excavated .
After receiving technical advice , all dumprock was removed from layer works and replaced with the combination layer . This design resulted in on-site material now usable due to the excellent compaction facilitated by the geogrid . By using the geotextile , up to 50 % less fill material was needed .
A layer of dumprock being encapsulated to serve as a reinforced base for stormwater pipes .
Kaytech ’ s solution for this project not only provided considerable economic benefits for the developer , but also greatly impressed the engineer and with 22 000m 2 of combination layer providing the ultimate in subgrade stabilisation , there ’ s no doubt that the Mamelodi Mall will be built on solid ground .
BRINGING COMMUNITIES TOGETHER
The mall is earmarked to become the central node for additional development in the area , which will directly benefit the Mamelodi community and surrounding areas .
Plans for new developments there include the construction of a Curro private school ( confirmed for the 2018 academic year ) in addition to a state-of-the-art private hospital in partnership with local Mamelodi doctors . As well as providing Mamelodi residents with topclass facilities conveniently located close to their homes , these developments also create permanent job opportunities . NAD maintains that Mams Mall is going to change Mamelodi forever .
KAYTECH KAYTECH
AFFORDABLE
SA HOUSING SEPTEMBER - OCTOBER 2017 37