Abstract：
The Liaogongzhuang station, which is on the west extension line of Beijing Metro Line 6, has a large area of miscellaneous fill composed of construction waste and household and industrial garbage. Because of the great variation in filling soil properties and the general state of the soil being unconsolidated, collapse is likely during the excavation process. Based on in-situ grouting experiments, it was decided to adopt the deep hole grouting method from the ground surface to reinforce the miscellaneous fill layer. Proven by construction practice, the ground grouting technique has the advantages of a short construction period, good reinforcement and visible grout on the working face, thereby ensuring that the excavation process is stable and fast.
2016, Vol. 53 