Experimental and Numerical Study on Grouting Reinforcement of a Broken Rock Mass

Abstract

Grouting technology can be selected to strengthen broken rock mass in order to improve its antiseepage and bearing capacity. Based on the working principle of infiltration grouting and grouting pipe technology, experimental and numerical studies are conducted by using high-water grouting material. In terms of numerical analysis and origin software, the polynomial prediction model is provided to establish the relationship between the grouting effect and influencing factors. According to the research findings, the lower the slurry level, the larger the diffusion range. The greatest influencing factors for diffusion radius, grouting volume, and strength are porosity, level height, and water–cement ratio, respectively. Through numerical simulation, corresponding amplification coefficient of diffusion length ranging from 1.21 to 1.33 is obtained, and subsequently, the maximum diffusion length is put forward. Finally, the slurry diffusion theoretical model is improved to explain the slurry diffusion characteristic.