全风化花岗岩钻杆水平后退式注浆技术研究  

Research on the Technology of Single-pipe Drill Level Retrograde Grouting for Completely Decomposed Granite

作　　者：王全胜[1] 肖红渠[1] 李治国[1] 

机构地区：[1]中铁隧道集团有限公司洛阳科学技术研究所,河南洛阳471009

出　　处：《铁道工程学报》2008年第7期74-78,共5页Journal of Railway Engineering Society

摘　　要：研究目的:由于富水全风化花岗岩易遇水软化、崩解、甚至流淌,造成钻孔塌孔、成孔困难,导致采用常规的前进式分段注浆工艺孔底注浆效果不好,为了解决这一问题,在现场试验了钻杆水平后退式注浆技术。研究结论:采用钻杆水平后退式注浆可获得较好的注浆效果,但在注浆过程中应严格控制工艺和技术参数,为获得更理想止水的效果,建议采用部分超细水泥或溶液型浆液。Research purposes. The technology for the purpose of overco decomposed granite because it easily opening. site experiment is done on the single -tube drill pipe ming the bad effect of the forward - stage grouting for softens, collapses and even flows away, resulting in the level retrograde - grouting the rich water completely 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.

关 键 词：全风化花岗岩 单管钻杆 后退式注浆 

分 类 号：TU754[建筑科学—建筑技术科学]