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土与结构接触面直剪试验是研究接触面力学特性的有效途径,在常规直剪仪的基础上改进了混凝土制备方法,即分别制作混凝土垫块和面块,预埋吊装钢筋,并以三峡库区碎石土为研究对象,开展了一系列不同法向应力和不同初始含水率条件下的碎石土与混凝土室内大型直剪试验,得到了其接触面力学特性的变化规律,试验结果表明该试验方法方便可行,可为土与结构相互作用大型直剪试验研究提供一定的参考。
The direct shear test of the contact surface between soil and structure is an effective way to study the mechanical properties of the contact surface. On the basis of the conventional direct shear shearer, the preparation method of concrete is improved, that is, the concrete pad and the noodle block are respectively manufactured, The gravelly soil in the reservoir area is taken as the research object, and a series of large-scale direct shear tests of gravelly soil and concrete under different normal stresses and different initial moisture contents are carried out. The variation law of the mechanical properties of the graded soil at the interface is obtained. The test method is convenient and feasible, which can provide some reference for large-scale direct shear test of soil-structure interaction.