Study On The Simulation Of Mechanical Properties Of Aquifer Similar Materials And Proportioning Test

Physical model test is one of the usual research methods in rock mechanics and engineering, and the key point is the development of similar materials. The traditional physical model test does not consider the simulation of pore (or fracture) water in rock mass. However, in recent years, with the increase of the scale of the underground construction in the water and the water rich strata, more and more attention to the problem of groundwater. Therefore, how to simulate the function of groundwater in the physical model test has become a new subject in the simulation experiment. The key of model test is the choice of raw material type and the proportion of the similar materials. In the choice of raw materials, not only to meet the traditional similar conditions, but also in the water physical characteristics to achieve similar. In this context, we have done a lot of experiments on the ratio of the new type of similar materials and how to determine the new raw materials, and the results of the experiment were processed. At the same time, the basic physical and mechanical properties and water characteristics of this new type of similar materials are obtained.The similar material of cementing material selection of pervious concrete, aggregate rubber particles and barite powder, test method by orthogonal experimental design method, of similar material sample volume, weight, moisture content, uniaxial compressive strength and permeability coefficient of three factor and four level control, a total of 16 groups of test of similar materials proportioning test to obtain similar physical and mechanical parameters of materials and the water physical properties.The main research results of this paper are as follows:(1) Through the test data, it can be concluded that, in the use of similar material simulation rock drainage, pervious concrete is a good cementing material, and rubber particles as aggregate can very good simulation of drainage process, barite powder can also to try adjusting the density effect. The mixture of the three not only meets the water not collapse, but also can simulate the water physical properties of some sandstone.(2) Through this test, available indicators with three experimental factors (the ratio of bone glue ratio, crumb rubber particle size, barite powder and rubber particles) changes, as follows:① Bone glue ratio:with the softening coefficient, water content, permeability coefficient is proportional to the relationship; the density, uniaxial compressive strength, modulus of elasticity into an inverse relationship.② Rubber particle size:with the uniaxial compressive strength, softening coefficient, moisture content, permeability coefficient is proportional to the relationship between the elastic modulus is inversely proportional to the③ Barite powder/rubber particles:with density, uniaxial compressive strength, modulus of elasticity into proportional relationship; the softening coefficient, water content, permeability coefficient is inversely proportional to the relationship.④ The density and the rubber particle size had no significant correlation. (3) Through the analysis of the factors and the relationship diagram, it can be seen that the parameters of each factor and the similar materials can be described by a linear relationship. Fitting a set of three variables with six variables. These equations can reflect the variation law of each parameter with each factor. The effect of rubber particle size on the density was not obvious.(4) The test data and regression equation obtained through this test can be applied to practical engineering cases, and can be used to obtain the ratio of raw materials needed in the examples. In the future of the pervious concrete and rubber particles and barite powder as a mixture of similar material matching test can be the experience equation according to want material water physical characteristic parameter values for the ratio design. The research results also provide some reference for future pervious concrete and rubber particles and barite powder similar material research.