Ground conditions shift dramatically as you move from the medieval core of King's Island onto the quaternary deposits south of the Shannon. Under English Town the limestone bedrock lies shallow, often within two metres of paving, yielding competent bearing strata with minimal overburden. Cross the Sarsfield Bridge into the Docklands and you encounter interbedded alluvial silts and soft organic clays that continue deepening toward Raheen. These contrasts demand more than index testing. A consolidated-undrained triaxial test captures the effective stress parameters that standard penetration alone cannot resolve, while a CPT campaign can map the lateral extent of the soft lenses before sampling begins.
A CU-pp triaxial suite on Limerick alluvium typically yields an effective friction angle between 28 and 34 degrees, depending on silt content and overconsolidation ratio.
