A) External Grouting between the sleeve and the soil. B) Fixing of main carrier pipe and Annulus Filling. C) Internal Grouting between GRP Pipe and the Sleeve. After the drive has been completed, a grout will be done between Sleeve and the ground to avoid any settlement and carrier pipe will belaid to the line and level supported on steel flat bar welded across the jacking pipe (supporting detail will vary according to the pipe dia and material), pipes are to be wrapped with 6mm thick neoprene rubber at the support place only. Once all pipes are in position and securely fixed and checked, a breather pipe will be placed at the soffit and head walls of block work will be built at the ends of the steel pipe.
Filling of annulus by dune/cement grout with super plasticizer added to aid flow by means of a sandpiper pump or pressure head. The filling operation will be continued until the Sleeve is completely filled.