SYNTHESIS GROUTING METHOD FOR SUPPLEMENTING THE GROUND AND STAGNANT WATER

摘要

A complex grouting method for ground reinforcement and water barrier performance is provided to increase the strength and durability of a ground injection material by mixing A-type slurry functioning as accelerator and B-type slurry functioning as retarder in the optimum ratio and injecting evenly to the ground. A complex grouting method for ground reinforcement and water barrier performance comprises the steps of: perforating the ground to the planned depth using a perforating machine or a hand drill, and manufacturing A-type slurry functioning as accelerator and B-type slurry functioning as retarder using a stirrer; and inserting injection equipment and an injection pipe connected with the stirrer into a perforated hole, injecting the A-type slurry and the B-type slurry under low pressure through the injection pipe, and then ascending and pulling up the injection pipe, wherein an injection pipeline of the injection pipe is formed to discharge the A-type slurry and the B-type slurry at the mixed state by forming a first pipeline(11) injected with the A-type slurry and a second pipeline(12) injected with the B-type slurry individually and putting the first pipeline into the second pipeline, and the A-type slurry is manufactured by mixing inorganic powder, which is composed of 50~65 weight percent CSA(Calcium Sulfoaluminate) clinker, 30~45 weight percent C12A7(lime-alumina compound), 4~8 weight percent CaCl2(calcium chloride) and 0.5~1 weight percent poly-carbon acid based super-plasticizer with water in the volume fraction of 33 to 67, and the B-type slurry is manufactured by mixing a compound formed by mixing inorganic powder, which is composed of 90~95 weight percent anhydrous gypsum, 1~3 weight percent Li(OH2), 2~5 weight percent hydration and 0.2~2 weight percent poly-carbon acid based super-plasticizer and cement in the weight ratio of 38 to 90, with water in the volume fraction of 29 to 81.