Residential Property at 145 Kloof Road, Cape Town

JG Afrika JG Afrika

SAICE Award: 2017 Highly Commended in Technical Excellence Category for Most Outstanding Civil Engineering Project in 2017
SAICE Award: 2017 Most Outstanding Civil Engineering Project for Geotechnical Engineering
Client: Private
Main Contractor: Franki Africa
Sub-contractors: Sbdscape

A six-storey residence at 145 Kloof Road with its three-level basement at the foot of Lions Head in Clifton won JG Afrika two 2017 SAICE Awards.

Notorious soil conditions and the proximity of existing properties to the building precluded the use of conventional soil anchoring systems and required a stabilised construction sequence.

JG Afrika and geotechnical subcontractor, Franki Africa, designed an innovative method that comprised a reinforced-concrete box system, with tension anchors rooted within the property boundaries to resist horizontal forces and conventional vertical piles that intercepted the slip-circle plane.

A structural steel propping system was then placed to shore the side walls during excavation.

The girders were dismantled as lateral loads were transferred to the concrete floor slabs at each level.

The fact that minimal ground movements were detected during the entire two-year-long build is proof of a very successful technical solution to the challenges set before the design and construction teams