Preparation method for artificially synthesized transparent soil material

Abstract

The invention discloses a preparation method for an artificially synthesized transparent soil material. The transparent soil material comprises baked silica sand particles and colorless pore fluids which have the same refractive index, wherein the pore fluids are mixed fluids of 12, alkane and 15# white oil; during preparation, a glass bar is used to stir constantly so as to ensure intensive mixing; a vacuum chamber is adopted for vacuumizing so as to remove residual air in a mixture until the mixture is transparent; finally, a consolidometer is adopted for consolidation. According to the invention, the preparation method is simple and convenient to operate and easy to implement; compared with other preparation methods, the preparation method is wide in material sources, low in cost, pollution-free and non-hazardous and can achieve a better transparent effect; the prepared transparent soil can be effectively used for model tests, and metabolic un-embedding visual observation in soil bodies can be realized.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering visualization model test, in particular to a preparation method of artificially synthesized transparent soil. Background technique [0002] The traditional soil deformation measurement method is to bury a series of sensors inside the soil to obtain the displacement of some discrete points, but the sensors are easily affected by the disturbance of the external environment, and the measurement results are often not accurate enough, and at the same time, the continuous deformation inside the soil cannot be given. The entire displacement field; modern digital image technology is only limited to measuring the macroscopic or boundary deformation of the soil, and cannot visualize the internal deformation of the soil; X-rays, γ-rays, computer tomography (CAT scans) and magnetic resonance Imaging techniques (MRI) can be used to measure continuous deformation inside soils, but the high cost...

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Problems solved by technology

[0003] Before the patent of this invention, in 2002, Iskander et al. used industrially produced amorphous silica powder or gel and pore liquid with corresponding refractive index to make a kind of artificial synthetic transparent soil, but due to the The powder or gel is a porous medium with many internal micro-pores. The artificial synthetic transparent soil made of it has a relatively high compressibility, which is still quite different from the natural soil, and its vacuum saturation is difficult, which affects its transparent effect. , which limits the further application of synthetic transparent soil in geotechnical engineering model tests

In 2006, Wu Mingxi et al. used fused silica sand and a calcium bromide solution with a corresponding refractive index to produce a synthetic transparent soil, but the calcium bromide solution is highly corrosive and has poor operability, and the purity of the fused silica sand is low. , and the price is relatively high, which also limits its wide application in model tests

Therefore, it is of great significance to use more suitable, more economical and wider sources of materials to make artificial synthetic transparent soil, but the current research in this area is still blank.

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