透明岩体相似材料物理力学特性研究

发布时间：2018-09-06 07:27

【摘要】：针对当前岩土工程物理实验中岩体相似材料不透明而致使模型内部变形无法直接观测的难题,借鉴透明土实验方法,对透明岩体相似材料展开实验研究.采用硅粉作为骨料,矿物油溶液(液体石蜡与正十三烷混合质量比为0.855)作为胶结料,成功研制出了一种透明岩体相似实验材料,并对其物理力学参数和特性进行了测试和分析.结果表明:1)透明岩样的单轴抗压强度和弹性模量与试样固结压力分别呈近似线性关系和指数关系;2)透明岩样三轴压缩强度与峰值应变随固结压力和围压的增大而增大,其密度、黏聚力、内摩擦角都与固结压力呈线性增长关系;3)研制的透明岩体材料与一种常用的传统相似材料的力学性质和变形破裂特征具有相似性.
[Abstract]:In view of the difficult problem that the similar materials of rock mass are not transparent in the current geotechnical engineering physical experiments, the internal deformation of the model can not be observed directly, and the experimental research on the similar materials of transparent rock mass is carried out by using the experimental method of transparent soil. Using silica powder as aggregate and mineral oil solution (mixed mass ratio of liquid paraffin and n-tridecane 0.855) as binder, a kind of similar experimental material of transparent rock mass was successfully developed, and its physical and mechanical parameters and properties were tested and analyzed. The results show that the uniaxial compressive strength and elastic modulus of transparent rock samples are approximately linear and exponential relationship with the specimen consolidation pressure. 2) the triaxial compressive strength and peak strain of transparent rock samples increase with the increase of consolidation pressure and confining pressure, and their density increases. The cohesive force, internal friction angle and consolidation pressure are linearly increased. (3) the mechanical properties and deformation and fracture characteristics of the transparent rock mass materials developed are similar to those of a conventional similar material.
【作者单位】：中国矿业大学深部岩土力学与地下工程国家重点实验室力学与建筑工程学院;
【基金】：国家自然科学基金项目(51174197) 国家重点基础研究发展计划(973)项目(2014CB046905) 江苏省高校“青蓝工程”中青年学术带头人培养项目(2012)
【分类号】：TU45

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