Civil Designer Showcase

ROUTE R61 - TOMBO TO PORT ST JOHNS, EASTERN CAPE

At Knowledge Base we are proud to showcase the achievements of our successful clients who continue to make a big difference through the work they do. HHO Africa (www.hho.co.za) is a well established and broad based consulting civil engineering company, recognised for their excellence in planning and design through numerous awards for technical excellence, innovative and environmental sensitivity.

The project comprised the reconstruction and realignment of 22 km of the road to an all weather surfaced standard. The first section traversed the steep eastern escarpment. The next section traversed the wide flood plain of the Mngazi river while the last section followed the steep right bank of the Umzimvubu river. Some of the more notable features of the project were:
  • Extensive geotechnical investigations of the unstable slopes of the escarpment and embankment settlement potential on the flood plain
  • Design speed determination to establish the most economical construction costs and reduce environmental damage
  • Containment of high fill slopes with 'Reinforced earth', gabion and concrete retaining walls and extensive drainage
  • Design of large cut slopes and erosion protection measures along the banks of the Umzimvubu river
  • 'Wick drain' stabilization of the flood plain embankment foundations and early construction to induce settlement


ROUTE R61 - TOMBO TO PORT ST JOHNS

 
ROUTE R61 - TOMBO TO PORT ST JOHNS


HHO Africa were responsible for the following consulting services:
  • Route location
  • Co-ordination of environmental scoping
  • Preliminary design report
  • Geotechnical and construction materials investigations
  • Materials utilization plans
  • Final geometric design
  • Pavement Design
  • Bridge and all other structural design
  • Contract documentation and tendering
  • Construction monitoring and administration


 
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