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Project No. D-36E5-06 <br />Christ Our Savior Catholic Parish <br />Appropriate amount of water should be added to achieve slump of about 2 inches or less <br />at injection point. <br />Procedure <br />Compaction grouting can be conducted in the following manner: <br />Grout pipes (2.5 inch OD, 1.875 inch ID, flush joint) should be drilled to 25 feet <br />below existing ground surface. <br />a <br />o <br />a <br />a <br />A design placement of 5 cubic feet of grout/stage (stage : I foot) for Primary <br />locations for depths between 25- and lO-feet and 4 cubic feet of grouVstage lor <br />secondary locations and maximum of 0.5 cubic feet of grout/stage shall be <br />injected between 5- to 10-feet depth. <br />Ground surface or structural heave should be observed. <br />Grout would be injected at a rate of2 cubic feeVminute or less until either pressure <br />refusal of the hole is achieved (back pressure in excess of 15 x D psi, where, D = <br />depth of injection in feet from ground surface, maximum pressure allowed is 450 <br />psi). <br />Grout pipe should be retrieved in I -foot intervals <br />Depending on pressures and depth, some additional grout may be placed to <br />maximize the densification of soils at the deeper depths. <br />o <br />a <br />o Grout holes may be drilled in Primary and secondary Pattem. <br />o Grout then should be injected frorn bottom elevation of pipe to 5 feet belorv <br />qround surface. <br />o Grout retum to surface constitutes failure of grout stage. <br />I <br />E <br />T <br />I <br />I <br />I <br />E <br />I <br />T <br />T <br />I <br />E <br />I <br />I <br />T <br />T <br />t.l <br />I <br />I30