| 摘要 |
PURPOSE:To perform optimum ground impregnation, by a method wherein, after an inorganic salt blended solution is poured into a ground, a water-glass blended solution is impregnated through a lower discharge port, and a multiple pipe is lifted up as said process is repeated. CONSTITUTION:After a double pipe A, formed a outer pipe 1 and an inner pipe 2, is penetrated into a ground down to a given depth, an inorganic salt blended solution, such as calcium chloride, is impregnated into a ground through an upper discharge port 4 of the outer pipe 1. By pouring a water-glass blended solution into a ground through a lower discharge port 3 of the inner pipe 2, inorganic salt is reacted with water-glass to prepare polyvalent metallic silicate, and a ground is solidified. The double pipe A is gradually lifted up to a given height, and a ground is improved through repetition of the above process. This enables free control of a pouring time of water-glass to the impregnated inorganic salt solution, and permits to perform optimum impregnation. |
