相似材料力学性质影响因素试验研究

发布时间：2018-06-13 19:33

本文选题：岩土工程 + 相似材料　；参考：《北京交通大学学报》2016年06期

【摘要】：选取地下工程物理模型试验中常用的石膏作为胶结剂,石英砂作为骨料制成相似材料试件.将相似材料试件置于不同尺寸、温度、含水率及加载速度条件下进行单轴压缩试验,得到单轴抗压强度和弹性模量,分析不同因素对相似材料力学性质的影响规律.研究发现,相似材料力学性质受尺寸、含水率及加载速度影响大,受温度影响小,且相似材料力学性质受不同因素影响原因与岩石的影响原因相同.为避免这些因素的影响,大型相似材料模型铺设时要严格控制用水量、充分搅拌原料、合理控制密实度及养护已经铺设的材料,同时精确控制荷载施加速度.
[Abstract]:Gypsum which is commonly used in underground engineering physical model test is used as cementing agent and quartz sand as aggregate to make similar material specimen. The uniaxial compression tests were carried out under the conditions of different sizes, temperature, moisture content and loading speed. The uniaxial compressive strength and elastic modulus were obtained, and the influence of different factors on the mechanical properties of similar materials was analyzed. It is found that the mechanical properties of similar materials are greatly affected by size, moisture content and loading speed, but not by temperature, and the influence of different factors on the mechanical properties of similar materials is the same as that of rock. In order to avoid the influence of these factors, the water consumption should be strictly controlled, the raw materials should be stirred sufficiently, the compactness and the maintenance of the materials already laid should be controlled reasonably, and the speed of load applied should be controlled accurately.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：国家科技支撑计划资助项目(2013BAB10B06)
【分类号】：TU43

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