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本文对石膏矽藻土混合物的特性作了进一步的研究.指出该混合物在水膏比为1.2—2.0、矽膏比在0.12—0.5时可以作为模拟大理岩的模型材料.在评价该模型材料对大理岩的相似性时,除一般论述外,还着重论证了它们的体积应力应变曲线之间的相似关系.体积应力应变曲线上的两个特征点将曲线划分为三个阶段,并均能一一相对应.在非连续介质的物理力学模型试验研究中,只有体积应力应变曲线之间有良好的相似性,才能使模型试验的研究成果简捷而比较准确地应用到原型中去.
In this paper, the characteristics of the mixture of gypsum diatomaceous earth were further studied. It was pointed out that the mixture can be used as a model material for marble simulation when the ratio of water paste is 1.2-2.0 and the paste ratio is 0.12-0.5. In the similarity of marble, in addition to the general discussion, the similar relationship between their volumetric stress-strain curves is also emphasized. The two characteristic points on the volume stress-strain curve divide the curve into three phases, and both can be Correspondingly, in the physical and mechanical model tests of discontinuous media, only the volume stress-strain curves have good similarities, so that the results of the model test can be applied to the prototype more accurately and simply.