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首页> 外文期刊>Case Studies in Construction Materials >Investigation of asphalt core-plinth connection in embankment dams
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Investigation of asphalt core-plinth connection in embankment dams

机译：堤坝沥青芯-基面连接的研究。

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The asphalt core itself is a no-joint water barrier in embankment dams and is connected to the concrete plinth on the bottom of the core. A reliable asphalt core-plinth connection is crucial and must remain watertight when the core deforms due to deformations in the embankment and foundation and due to reservoir water pressure. A large number of tension tests were conducted to determine the best ratios, joint thickness and suitable additives for the sandy asphalt mastic (SAM) mix used for the connection. With the ratios of bitumen to filler to sand of 20%:35%:45% and by adding 4% SBS in the bitumen, one got a very suitable composition for the asphalt core-plinth connection in tensile conditions. Model tests were conducted to study the connection behavior when subjected to large shear displacements and high water pressure. The joint model test results indicate that the plane-surface plinth, curved-surface plinth, and plinth with or without copper water-stop showed no significant difference for the connection in the joint shear behavior. However, plinth with copper water-stop is suggested to enhance its tensile and shear behavior.
机译：沥青岩心本身是堤坝中的无节水屏障，并与岩心底部的混凝土基座相连。可靠的沥青岩心与地基的连接至关重要，当岩心由于路堤和地基的变形以及储层水压而变形时，必须保持水密性。进行了大量的拉伸试验，以确定用于连接的沙沥青胶泥（SAM）混合物的最佳比例，接缝厚度和合适的添加剂。沥青与填料的比率为20％：35％：45％，并在沥青中添加4％SBS，人们就在拉伸条件下获得了一种非常适合的沥青芯-基层连接的组成。进行模型测试以研究在大剪切位移和高水压下的连接行为。接头模型测试结果表明，平面底座，曲面底座和带或不带铜止水带的底座在接头剪切性能方面没有显着差异。但是，建议使用带有铜质阻水层的底座来增强其拉伸和剪切性能。

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