The ground conditions shift dramatically between Limerick's historic core on King's Island and the newer commercial districts south of the river. On the island, you hit stiff glacial till and limestone at relatively shallow depths, which makes for a more predictable dig. Move towards the Docklands or the Raheen industrial area, and you are into deep sequences of soft alluvial silts and clays deposited by the Shannon over millennia—material that creeps under load and demands a very different approach to temporary support. We combine site-specific ground models with in-situ permeability testing across Limerick's variable strata because water ingress from the Shannon's aquifer is a design driver, not an afterthought. For excavations near the river channel itself, understanding these transitions early avoids costly redesign when the shoring is already in the ground.
In Limerick's Docklands, a 9-metre excavation can influence settlement bowls 25 metres from the wall face if the alluvium is not properly characterised.
