M. C. Matthews, C. R. I. Clayton, A. V. D. Bica; Tension pile tests in chalk. Quarterly Journal of Engineering Geology and Hydrogeology ; 33 (3): 201–212. doi: https://doi.org/10.1144/qjegh.33.3.201
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This paper reports the results of a series of pull-out tests performed on mini-piles in chalk. Also reported are load–displacement data for similar piles when used in a group, for anchoring large-diameter plate loading test equipment. A comparison is made with the limited data reported in the literature. The observed uplift resistance of these piles is compared with that predicted by existing design methods, based upon SPT, and vertical effective stress.