Influence of SiO2 nanoparticles and Fe3O4 solution on the consolidation of geological soft soil

Abstract

Soft soil is widely distributed in coastal areas and needs to be treated first when used as a foundation. A method of incorporating nano SiO2 particles and nano Fe3O4 solution is proposed to address the consolidation problem of geological soft soil. During the process, nanomaterials are selected and a preparation method for incorporating nanomaterial soil is designed. Subsequently, the experimental device is designed and the main instrument usage methods are specified, resulting in a complete experimental process design. The experimental results showed that in the generation of electron microscope images of soil, the soil mixed with nano SiO2 particles or nano Fe3O4 solution has a denser characterization; In the experiment of current variation in soil, the maximum current of the soil mixed with nano SiO2 particles is 0.1052 A at 72 hours; In the soil drainage test, the maximum total drainage of the soil mixed with nano Fe3O4 material at the end reached 1907 mL; In the soil pH value experiment, the pH value of the soil is higher when the proportion of nano SiO2 material added is 3‰ and the proportion of nano Fe3O4 material added is 2‰. The above results indicate that the geological soft soil consolidation method designed by the research institute incorporating nano SiO2 materials or nano Fe3O4 materials can effectively improve the drainage and mechanical properties of the soil.