St Andrew’s College – Preparatory school standing proud
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Application/s: New Foundations
Location: Christchurch
Main Contractor: Mainzeal
Completed: Apr 2010
In April 2010, Piletech completed piling work on the St Andrew’s College Preparatory School building in Merivale, Christchurch. Piles were installed to depths of 14m – 17m below ground level into a dense founding layer and Mainzeal proceeded with construction of the two storey structure, which was nearing completion when the devastating earthquake of 22 February 2011 hit Christchurch.
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Several buildings on the campus suffered varying degrees of settlement as a result of this and subsequent earthquakes, however the Prep School stood proud – 300 mm above the surrounding ground in fact.

Renee Brook of Holmes Consulting Group inspected the building following the February quake and recalls “the building performed extremely well with no structural damage and virtually no gib cracking to the walls at all. The ground under the building has settled due to liquefaction up to 300mm and this building has remained level and useable. The only remedial details required for the building was the pumping of concrete under the slab and foundations to fill the voids and provide back lateral bearing for the foundation beams as well as some exterior work at door entries to maintain slopes and access. We are very pleased with the performance of the building as a whole.”

This was a great result for the school, as the Prep School could continue as normal. Piletech is proud to have played a part in keeping St Andrew’s College operational, continuing to provide a world class education for its 1,350 students.

(Images courtesy of Holmes Consulting Group & Frances Oliver)