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为研究地下结构与富水多孔岩体的相互作用问题,根据模型试验相似理论,研制出了一种多孔介质固-液耦合相似材料,该材料由中粗砂、水泥、透水混凝土增强剂合水按一定配比均匀拌和压制而成。运用正交试验设计原理进行配比试验,制作模型小试件,进行了单轴抗压强度、渗透系数、重度、弹性模量、泊松比等参数测试,找出了相似材料各成分对配比试件的影响特征,可根据需要在物理模拟试验中选取不同配比。该配方力学指标稳定,满足一次性浇筑大尺寸模型试件的要求,适用于进行结构与围岩体耦合失效破坏模式的大型物理模拟试验,为富水条件下地下结构风险评估提供了相似试验材料。
In order to study the interaction between underground structure and water-rich porous rock mass, a similar solid-liquid coupling material for porous media was developed based on the similarity theory of model tests. The material consisted of coarse sand, cement, permeable concrete reinforcing agent and water Press a certain proportion of uniform mixing and suppression made. Orthogonal experimental design principles were used to carry out the ratio test to make small test pieces of the model. Uniaxial compressive strength, permeability coefficient, heavy degree, elastic modulus, Poisson’s ratio and other parameters were tested. The impact of the characteristics than the specimen, according to the need to select different physical simulation test ratio. The formulation mechanics index is stable and meets the requirement of one-time pouring of large-scale model specimens. It is suitable for the large-scale physical simulation test of the failure mode of coupling failure between the structure and the surrounding rock mass, and provides similar experimental materials for risk assessment of underground structures under water-rich conditions .