基于正交设计的“固-气”耦合相似材料力学与渗透特性试验研究

为研究“固-气”耦合相似材料力学与渗透特性，运用正交试验设计配制了以河砂为骨料、石蜡为胶结剂、液压油为调节剂等组合的相似材料；采用极差分析及多元回归分析等方法，研究了冲击次数、骨料粒径、油含量、胶砂比对相似材料抗压强度、弹性模量、泊松比及渗透率的影响。结果表明：各因素对抗压强度的影响由大到小依次为油含量、冲击次数、骨料粒径及胶砂比；对弹性模量的影响为油含量、冲击次数、胶砂比及骨料粒径；对渗透率的影响为冲击次数、胶砂比、油含量及骨料粒径；各因素对泊松比影响较小。相似材料的抗压强度、弹性模量与冲击次数、骨料粒径呈正相关关系，与油含量、胶砂比呈负相关关系；渗透率与冲击次数、骨料粒径、油含量呈负相关关系，与胶砂比呈正相关关系；泊松比与各因素无明显关系。得到各因素共同影响下相似材料特性参数的综合模型。

Research on mechanics and permeability characteristics of similar material of solid-gas coupling based on orthogonal design

To study the mechanics and permeability characteristics of similar material of solid-gas coupling,orthogonal test is used to make up similar material which using river sand as aggregate,paraffin as cementing agent and hydraulic oil as regulator.Adopting range analysis and multivariate regression analysis,the influence of impact number,aggregate size,oil content and cement-sand ratio on the compressive strength,elasticity modulus,Poisson’s ratio and permeability of similar material are investigated.The test results show that the size order that factors against compressive strength is oil content,impact number,aggregate size,and cement-sand ratio.The size order that factors against elasticity modulus is oil content,impact number,cement-sand ratio and aggregate size.The size order against permeability is impact number,cement-sand ratio,oil content and aggregate size.The factors have less influence on Poisson’s ratio.The compressive strength and elasticity modulus of similar material is positively related to impact number and aggregate size,and is negatively related to oil content and cement-sand ratio.The permeability is negatively related to impact number,aggregate size,oil content,and is positively related to cement-sand ratio.Poisson’s ratio has no obvious relationship with the factors.The comprehensive model of characteristic parameters of similar material is obtained under the influence of four factors in test.