武广客运尖峰顶隧道特种围岩袖阀管化学注浆技术

Chemical Grouting Technology for Special Surrounding Rock Sleeve Valve Tube in Wuhan-Guangzhou PDL Jianfengding Tunnel

袖阀管(即双层管双栓塞灌浆法)灌浆技术是利用袖阀管外套管与双栓塞移动,达到定位、定量多次往复灌浆的施工方法,与化学灌浆结合,利用化灌材料可灌注、可控性等优点,能成功解决特殊地质条件下的工程项目的加固问题。

Sleeve valve tube（double-tube double-embolism grouting method） grouting technique is a construction method using the movement of sleeve valve tube overtube and double embolism to realize the multiple reciprocating grouting which has constant place and quantity.Combined with chemical grouting,and taking advantage of the chemical grouting materials＇ merits of groutability and controllability,this method can successfully resolve the reinforcement problem of engineering project in some special geological conditions.