Abstract：Research purposes ； The site experiment is done on the single-tube drill pipe level retrograde - grouting technology for the purpose of overcoming the bad effect of the forward - stage grouting for the rich water completely decomposed granite because it easily softens, collapses and even flows away, resulting in the open collapse and difficult opening.
Research conclusions ： Single - tube drill pipe level retrograde grouting can obtain better grouting effect，but the grouting process and technical parameters should be controlled strictly. In order to obtain a better result of stopping water, it is proposed to use ultra - fine cement or solute grouting liquid.
王全胜,肖红渠， 李治国. 全风化花岗岩钻杆水平后退式注浆技术研究[J]. 铁道工程学报, 2008, 25(7): 74-78.
WANG Quan-sheng，XIAO Hong-qu, LI Zhi-guo. Research on the Technology of Single - pipe Drill Level Retrograde Grouting for Completely Decomposed Granite. 铁道工程学报, 2008, 25(7): 74-78.
2008, Vol. 25 
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