Kleinfelder were contracted to assess the slope stability of areas of unconsolidated fill within a client’s site. Initial site investigations, field tests and computer analysis, identified that further stability works would be required for the site to meet the desired Factor of Safety (FOS) for future users.

Understanding the challenges

Tackling inclement weather, slope instability, heavy machinery on steep slopes, and exposure to materials requiring capping, Kleinfelder’s geotechnical engineers designed a clay infill wall for geotechnical stabilisation. This included a combination of cutting, benching, placing, and compacting of the soil layers to stabilise the slope and to limit future slumping which may present a safety risk for future land users.

Planning for Success

Precision planning of safety protocols and flexible work plans for inclement weather events, meant the extended team were poised to proceed in a safe and methodical manner. The success of the project was further enhanced by the use of key surveying information and geotechnical specifications to derive required material estimates and controlling the field density of the new layers with nuclear Density Gauge and comparing with the lab results. Hydro-seeding was then provided to the topsoil after final grading to protect the slope surface from future erosion.

Project Results

Kleinfelder’s training, planning and design processes, including field assessment, software analysis and design, and execution ensured the project was completed within the client’s three week timescale and in accordance with
AS 3798 and AS 4678.

The accurate assessment, analysis and design solution provided by Kleinfelder ensured the safety factor of the slope increased to the desired FOS for future users.

Project Details

Location:
Adelaide, South Australia

Owner:
Confidential Client