Application Research Of Grouting Reinforcement Technique In Loess Subway Tunnel Construction

High-pressure jet grouting technology has remarkable characters of wide range in scope,safe and reliable,convenient for construction,high pile shaft strength,low cost and so on. So it is widely applied in stability of slope, impermeable dam,reinforcement of building foundation,foundation treatment,anti-seepage or impermeable,etc.it has been spreaded over the world.This paper based on shaft jet grouting construction of the first phase of the project of xian metro line 2 at f3 ground fissures, it intensive research the characters, classify, mechanism, design principle, the determination of design parameters, contractor design, process flow, the measures of quality control of high pressure jet grouting in summarizing the development and application of grouting technique of the world, And through the field test pile, coring samples, numerical simulation to evaluate the effect of sealing up and reinforcement of jet grouting, come to a conclusion:the high pressure jet grouting can make a good effect of sealing up and reinforcement in the construction of the shaft.