Underpinning in Co. Offaly

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This project was awarded to Substruck Ltd. by Offaly County Council after a competitive tender process. The scope was to design, construct, test and certify an underpinning scheme to address foundation movement on a residential property in the town of Clara.  

Ground investigation showed that bedrock was located at shallow depths. Therefore, as load transfer by micropiles is predominantly though friction, a 2 metre rock socket was required to achieve the specified loads.  

Substruck Ltd. designed and constructed a series of micropile supported reinforced concrete ground beams. Straddle beams were installed at each corner and cantilever beams were installed along the remaining area of distress. Two nr micropiles were independently tested to SWL*1 and SWL*1.5 where SWL = 125kN and were found to perform adequately with settlement recorded of 2.6/4.7mm and 3.1/5.5mm respectively.  

Representatives of the Client visited the site on several occasions to inspect the work, both from quality and safety aspects.  We kept in close contact with these stakeholders during the project to keep them updated on progress.  All works were certified on completion with as built drawings provided for inclusion in the safety file.

The resident engineer even wrote us a nice thank you note for leaving the site in such a neat and tidy manner.