Water shutoff model test in water-rich sandy stratum by phosphoric acid-water glass grout
来源期刊：中南大学学报(英文版)2014年第10期
论文作者：YANG Yu-you(杨宇友) NI Mao-guang(倪茂光)
文章页码：4014 - 4020
Key words：water-rich sandy stratum; phosphoric acid-water glass grout; grouting; water shutoff; model test
Abstract: The rheological behavior of phosphoric acid-water glass grout in different mixing ratios was studied. Grout made of water glass with Baume degree of 20° and 13.4% phosphoric acid by 1:1 volume ratio is found to be more effective in stopping water. Laboratory model test of water shutoff by grouting was conducted. Test results show that the diffusion length and water cutoff effect of the grout are significantly improved as the grout head is raised, due to the dilution of underground water, and it takes the grout longer than its gel time to cut off water.
YANG Yu-you(杨宇友), NI Mao-guang(倪茂光)
(School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China)
Abstract:The rheological behavior of phosphoric acid-water glass grout in different mixing ratios was studied. Grout made of water glass with Baume degree of 20° and 13.4% phosphoric acid by 1:1 volume ratio is found to be more effective in stopping water. Laboratory model test of water shutoff by grouting was conducted. Test results show that the diffusion length and water cutoff effect of the grout are significantly improved as the grout head is raised, due to the dilution of underground water, and it takes the grout longer than its gel time to cut off water.
Key words:water-rich sandy stratum; phosphoric acid-water glass grout; grouting; water shutoff; model test
