During the winter of 2019–2020, a landslip occurred within a historic pit now situated in the garden of a house. The crest of the landslide was approximately 3 meters from the house and 1 meter from the garage, prompting concerns that further instability could pose a threat to these structures.
Monson Engineering was tasked with designing the remedial works required to stabilise the landslip. To address the instability, a new retaining wall and a change in the slope gradient were chosen as the primary solutions.
We developed a Digital Terrain Model (DTM) to assess the volume of fill material needed for the project. Additionally, we provided a drainage design, a critical component for maintaining the long-term stability of the re-graded terrain. This consisted of the installation of 225mm dia storm drains laid below the new graded slope.
To modify the land's gradient, we also designed the foundation for a 2-meter-high gabion basket retaining wall, which was integral to stabilising the slope.
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