in part from the three dimensional polystyrene material known commercially as mirafi u00ae g series drainage composite which can be modified to function as a grout diffusing material preferably the mirafi u00ae g200n drainage composite is used which is available from ten cate geosynthetics at 365 south holland drive pendergrass ga 30576 alternatively other methods to distribute grout familiar to those skilled in the art may be used in conjunction with the barrel 1 such as the incorporation of a three dimensional geo textile disc between the conduit 9 and the bottom plate 7 or the addition of a gravel bag to the barrel 1 fig3 depicts a pier 24 wherein grout 30 has been pumped into the barrel 1 according to one embodiment of the present invention conduit 9 is in fluid communication with a reservoir not pictured containing fluid grout upon opening valve 31 grout may be pumped from the reservoir through a hose 32 or pipe to conduit 9 and into barrel 1 the barrel 1 will keep the pressurized grout 30 contained in the target area directly under the pier 24 and the grout 30 will exert downward pressure on the barrel 1 and upward pressure on the pier 24 the pressure of grout 30 within the barrel 1 may be measured.