Journal
JOURNAL OF HYDRAULIC RESEARCH
Volume 49, Issue 6, Pages 750-756Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00221686.2011.618055
Keywords
Dam safety; fracture; rock; scour; spillway
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Block Stability in 3 Dimensions (BS3D) is an incremental-iterative algorithm and code to analyse general failure modes of rock blocks subjected to generic forces, including non-conservative forces such as water pressure. This algorithm is used to investigate the effect of high-velocity water jet impact on the stability of single rock blocks in plunge pools. After reviewing the literature, an approach is proposed to estimate the dynamic water pressure fluctuations at the pool bottom and in rock fractures. The approach is validated using an experimental study. In addition, by comparing the results of these analyses to additional experimental results, a scour threshold is introduced for plunge pools. It is found that if the maximum upward block displacement is larger than a quarter of the block height, the block is most probably removed from its mould.
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