Research conclusions:Based on mixing proportion of indoors theory and combined with the operation and use on the construction site，the mixing proportion of the quasi － mastic slurry that met the technical requirements was decided．The ground monitored data showed the ground settlement could be controlled within 10 mm range after the 3． 75 cubic meters of quasi－mastic slurry and 1.2 cubic meters of double slurrys were grouted and the biggest ground change appeared when the segment was just dragged out from the shield tail． So the synchronous grouting volume should be enough and the secondary grouting could effectively control the settlement in late stage． Basically there was no influence if the settlement of the structures and buildings was in the range from + 4 mm to－16 mm．