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本文使用巴西法对多层不同尺寸、不同岩性组合的成层复合岩石进行了强度和变形实验,发现:复合岩石在拉伸时具有异常的岩性导变破坏特性,这种性质使得复合岩石的拉伸破坏总是以高强度岩石到低强度岩石的顺序进行。实验还表明:对于厚比不变,总厚度保持在1.6～2.5cm之内的复合岩石,巴西法不会对抗拉强度有大的影响;而总厚度不变,各层岩石厚比的变化对抗拉强度有较大的影响。
In this paper, the strength and deformation experiments of stratified composite rocks with different sizes and different lithologies were carried out using the Brazilian method. It was found that the composite rock has an abnormal lithological deformation characteristic when stretched. This property makes composite rocks. Tensile failure is always performed in the order of high-strength rock to low-strength rock. Experiments have also shown that for composite rocks with constant thickness ratios and composite thicknesses within 1.6 to 2.5 cm, the Brazilian law does not have a large effect on tensile strength; the total thickness remains unchanged, and the change in the thickness ratio of the layers in each layer is opposed. Tensile strength has a greater impact.