Population growth is pushing us to develop in more confined spaces and areas with poor ground conditions – we are digging deeper and building closer.

Installing in-ground structures to support these developments can cause the loss of integrity to surrounding foundations; construction can create considerable vibration in densely populated areas and embankments can move.

The construction costs of in-ground structures are also typically higher than other comparable structures above ground and the risks are harder to define.

Coffey has an extensive understanding of soil-structure interaction and expertly applies this to the geotechnically complex design of retention systems. Our knowledge of geological and hydrogeological conditions enables us to gain a deep understanding of any project site and its history. Our calculations and analyses are robust – all decisions are based on sound judgment and experience. We’re able to assess the ground stratigraphy, groundwater conditions and soil/rock behaviour to design safe and cost effective retention systems.

We’re experienced in incorporating our geological models into state-of-the-art numerical analysis that utilises the ground’s inherent strength and stiffness characteristics to optimise support requirements.

In soil structure interactions, like deep retained excavations, the construction sequence significantly affects the stresses induced in the structure - meaning that this has to be considered as part of the design. Our team works collaboratively with structural engineers and constructors to ensure the design delivers all project requirements.

At Coffey we continually provide innovation to projects by being part of a circular team structure where all relevant specialists interact and contribute to the design, challenging the adopted solution.