A large-size direct shear test was conducted to test the interface of dredger fill and concrete. The effect that concrete strength and the density of dredger fill have on the properties of interface is then analyzed. Digital photography was used to record soil particles of dredger fill moving near the interface, and the particle images were analyzed by particle image velocimetry technique. The results of the tests show that the shear strength of interface fit the model laid out in the Mohr–Coulomb theory. The relationship between shear displacement and shear stress fit the hyperbola model. Soil particles of dredger fill near the interface have large horizontal displacement and obvious vertical displacement of the particles. Under high normal stress, concrete strength has significant influences on the shear strength of interface. Density of dredger fill has great effects on the shear strength of interface.

中文翻译：

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使用大型直接剪切试验的挖泥船与混凝土的界面剪切特性

进行了大型直接剪切试验，以测试挖泥船与混凝土的界面。然后分析了混凝土强度和挖泥机填充密度对界面性能的影响。用数码照相技术记录了挖泥机填充物在界面附近移动的颗粒，并通过颗粒图像测速技术对颗粒图像进行了分析。测试结果表明，界面的剪切强度符合Mohr-Coulomb理论中提出的模型。剪切位移和剪切应力之间的关系符合双曲线模型。挖泥船填充的土壤颗粒在界面附近具有较大的水平位移和明显的垂直位移。在高法向应力下，混凝土强度对界面的抗剪强度有重要影响。