Grouting reinforcement mechanism and experimental study of cement quick-setting slurry infiltration

Abstract

According to the sand treatment of cement single liquid penetrant reinforcing effect is poor and the problem of quick setting slurry splitting grouting to control the deformation of the ground surface. For the study on the C-S grouting reinforcement master the quantitative relationship between the factors and the physical and mechanical properties of reinforcement. Choose the cement water glass fast setting slurry. By using different injection medium effective diameter and different grouting pressure conditions, carry out sand grouting test. Study on the variation law of single axial compressive strength and permeability coefficient of stone body strengthened by grouting. Through the analysis of the influence of the plasmid size, the grouting pressure and the diffusion distance. It reveals the strengthening factors of C-S grout penetration grouting and the strengthening mechanism of different physical and mechanical indexes, and the quantitative relationship between them is obtained by regression analysis, and using PFC numerical calculation, the article explores the mechanism of grouting reinforcement. The effective diffusion range of cement based quick setting slurry grouting is put forward. The method for determining the parameters of grouting reinforcement is given, and the results are successfully applied in Qingdao Metro. The research results have certain reference significance for the development and improvement of the mechanism of penetration grouting reinforcement.