Table of Contents Author Guidelines Submit a Manuscript
Advances in Materials Science and Engineering
Volume 2018 (2018), Article ID 1893195, 10 pages
https://doi.org/10.1155/2018/1893195
Research Article

Comparative Study of Soil Grouting with Cement Slurry and Cement-Sodium Silicate Slurry

1Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shandong 250061, China
2Shandong Transportation Institute, Jinan 250031, China

Correspondence should be addressed to Qingsong Zhang; nc.ude.uds@gnosgniqgnahz

Received 26 May 2017; Accepted 24 October 2017; Published 18 February 2018

Academic Editor: Carlo Santulli

Copyright © 2018 Mingting Zhu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cement slurry and cement-sodium silicate slurry are most widely applied for soil grouting reinforcement project. The viscosity change of cement slurry is negligible during grouting period and presumed to be time independent, while the viscosity of cement-sodium silicate slurry increases with time quickly and is presumed to be time dependent. Due to the significant rheological differences between them, the grouting quality and the increasing characteristics of grouting parameters may be different. Those are main factors for grouting design. In this paper, a large-scale 3D grouting simulation device was developed to simulate the surrounding curtain grouting for a tunnel. Two series of surrounding curtain grouting experiments under different initial pressures of 100 kPa, 150 kPa, and 200 kPa were performed. The overload test on the tunnel was performed to evaluate the grouting quality of all surrounding curtain grouting experiments. The results show that the increasing trend of grouting pressure for cement-sodium silicate is similar to its viscosity; the setting time of cement-sodium silicate slurry obtained from the laboratory test is less than that in the practical grouting environment where grout slurry solidifies in soil; the grouting quality of cement-sodium silicate slurry is better than cement slurry, and the grouting quality decreases with initial pressure.