Method for controlling running sand in underground engineering and grouting system therefor

The invention discloses a method for underground engineering control running sand and grouting system thereof. The method includes steps of determine running sand geology, redacting construction plan, providing construction equipment, grouting operational process, and acceptance check qualified measuring . The grouting system for implementing the method includes a boring machine, a slurry stirring implement, a mud injecting pump, a slurry carrier pipe, a motor, an exterior tube and a grouting inner pipe. The invention uses a multiple discharging solid boring tube setting up grouting method and a grouting system to change running sand into solid condition. The method has advantages of better safe reliability and being capable of crossing a running sand layer to realize open type construction. Compared with the prior technology, the method and apparatus are simple, the engineering investment is few, cost is low and the operations are convenient and harmless to human body and surroundings. Testified by experimen