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RESULTS OF PILE LOADING TESTS ON SOCKETED STEEL PIPE PILES

Ali Ameli, PhD, PE, Currently Geo Engineering Ltd., Vancouver, BC, Canada.

This work stemmed from the construction inspection of a piling project in Victoria, BC. Three compressive and 2 tensile loading tests were carried out as part of quality control/quality assurance scheme. At the interim stage, the results of pile loading tests were utilized to verify the socket video image interpretations. An under-ream drilling method with the down-the-hole hammer technique was used. Pile installation method and quality control criteria are also discussed. The design of piles socketed in fresh to moderately weathered granodiorite rocks is reviewed and design assumptions are compared with as-built conditions. The thorough quality control schemes employed for the rock sockets led to the attainment of a greater factor of safety than that assumed in the design stage. The quality control procedures introduced and the loading test results could be rich aids for economic design and execution of foundation piles in similar geological conditions.

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