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Geotechnical Engineering

At HHO, we understand the need to develop infrastructure that benefits humankind. Most of what we see around us, whether it be the humblest of dwelling to the largest dam, is either supported by soil or rock. Geotechnical engineering is the science that explains the mechanics of soil and rock and its applications in the built environment.

Over the years we have nurtured our in-house geotechnical expertise to the point where they are highly regarded and respected amongst their peers. We are able to carry out the analysis and designs using the latest computer modelling and design software as well as carry out the construction supervision over a wide range of applications to ensure the integrity of the engineering work.

  • Foundation investigations for roads, bridges and structures
  • Investigation and stability analysis of unstable slopes
  • Design of cuttings, embankments and retaining systems
  • Design of lateral support systems for excavations
  • Earth and rock anchor design
  • Shallow and deep foundation design
  • Design of sub-surface drainage systems to drain waterlogged soils
  • Location and investigation of quarries and borrow pit material sources
  • Waste management and landfill design
  • Specialist construction supervision

Kranspoort Pass, Mpumalanga, South Africa

HHO undertook the design of the cut widening’s (up to 40 meters in height) which involved the installation of a rock trap and barrier. Due to the varying nature of the geology, it was necessary to provide additional protection measures such as gabion tied back walls and the installation of high tensile wire mesh to the exposed faces.

N3 Quarry Investigation, KZN, South Africa

As part of the N3 road corridor upgrade, HHO undertook the materials investigation for suitable sources of material, both gravels and stone for the road construction activities. Desk studies, field reconnaissance, seismic surveys, and percussion and core drilling were used to identify suitable sources of material.

Ugie Langeni Mountain Pass, Eastern Cape, South Africa

HHO undertook the design of cuts and fills associated with the new mountain pass. The geology varied from hard rock dolerite to thick transported materials (talus). Designs included surface and subsurface drainage, gabion and concrete retaining walls and two mechanically stabilised earth retaining walls tied back with soil nails.