The purpose of this study is to conduct hole erosion tests (HETs) to better understand the progression of concentrated leaks in compacted soils. While samples with high levels of compaction have been extensively tested for their erosion characteristics in the literature, soils at lower compaction levels have not yet been extensively assessed. This study aims to better understand the internal erosion behaviours of low-compacted soils during the progression of concentrated leaks. To this end, compaction tests are performed on various mixtures of Sydney sand and kaolin clay samples at different compaction moisture contents (i.e. moisture content at the time of compaction) and compaction efforts. Optimum moisture contents for different compaction efforts are subsequently determined. Samples for the HET are then prepared at various compaction densities and moisture contents to obtain their rate of erosion due to concentrated leaks. Results from testing show that if appropriate moisture contents are used, low-compacted samples do not necessarily show higher erodibility potential. The results can help in the determination of the most cost-effective, yet stable, materials for use in practice, for example in the core of embankment dams.

这项研究的目的是进行孔蚀测试（HET），以更好地了解压实土壤中集中泄漏的进程。尽管在文献中已经对高压实度的样品的侵蚀特性进行了广泛的测试，但较低压实度的土壤尚未得到广泛的评估。这项研究旨在更好地了解在密集泄漏过程中低密实土壤的内部侵蚀行为。为此，在不同压实水分含量（即压实时的水分含量）和压实作用下，对悉尼砂和高岭土样品的各种混合物进行压实测试。随后确定用于不同压实作用的最佳水分含量。然后，以各种压实密度和水分含量制备用于HET的样品，以获得由于集中泄漏而引起的腐蚀速率。测试结果表明，如果使用了适当的水分含量，低密度样品不一定显示出更高的可蚀性。结果可以帮助确定最具成本效益但最稳定的材料，例如在堤坝的核心中使用的材料。