Prediction of ground surface displacement caused by grouting
来源期刊：中南大学学报(英文版)2015年第9期
论文作者：GUO Feng-qi LIU Xiao-tan TONG Wu-qi SHAN Zhi
文章页码：3564 - 3570
Key words：grouting; ground surface displacement; stochastic medium theory; seepage; slurry solidification shrinkage
Abstract: Ground surface displacement caused by grouting was calculated with stochastic medium theory. Ground surface displacement was assumed to be caused by the cavity expansion of grouting, slurry seepage, and slurry contraction. A prediction method of ground surface displacement was developed. The reliability of the presented method was validated through a comparison between theoretical results and results from engineering practice. Results show that the present method is effective. The effect of parameters on uplift displacement was illustrated under different grouting conditions. Through analysis, it can be known that the ground surface uplift is mainly caused by osmosis of slurry and the primary influence angle of stratum β determines the influence range of surface uplift. Besides, the results show that ground surface uplift displacement decreases notably with increasing depth of the grouting cavity but it increases with increasing diffusion radius of grout and increasing grouting pressure.
GUO Feng-qi(郭风琪), LIU Xiao-tan(刘晓潭), TONG Wu-qi(童无期), SHAN Zhi(单智)
(School of Civil Engineering, Central South University, Changsha 410075, China)
Abstract:Ground surface displacement caused by grouting was calculated with stochastic medium theory. Ground surface displacement was assumed to be caused by the cavity expansion of grouting, slurry seepage, and slurry contraction. A prediction method of ground surface displacement was developed. The reliability of the presented method was validated through a comparison between theoretical results and results from engineering practice. Results show that the present method is effective. The effect of parameters on uplift displacement was illustrated under different grouting conditions. Through analysis, it can be known that the ground surface uplift is mainly caused by osmosis of slurry and the primary influence angle of stratum β determines the influence range of surface uplift. Besides, the results show that ground surface uplift displacement decreases notably with increasing depth of the grouting cavity but it increases with increasing diffusion radius of grout and increasing grouting pressure.
Key words:grouting; ground surface displacement; stochastic medium theory; seepage; slurry solidification shrinkage
