Research conclusions:Using full-face curtain grouting technology to dealwith the deep weathered and weak stratum can obtain a good resul,t but the technique and technicalparameters forgrouting should be controlledwel.l The grouting technique should be the segmental grouting in advance along with afterward grouting. The vertical grouting length for submarineweathered troughs does not exceed 25 m.The area of the grouting in portraitshould be 4m outof the contour line of the service tunnel and the area of the grouting in the travelling tunnel is5m. The groutingmaterial isGM cemen.t