| 摘要 |
PROBLEM TO BE SOLVED: To improve the supporting force or the bearing force of the ground or the peripheral ground right under an objective area irrespective of presence/ absence of an existing structure in a new or existing soft ground, by injecting a penetrating material increasing an adhesive force of the soil in the ground to be improved and sucking and recovering the penetrating material. SOLUTION: A hole is bored in a ground 1 to be improved by boring and an injection device 2 and a suction device 3 are arranged in the holes 21, 31. A sufficient penetrating material 4 is injected in the ground 1 within a specified range by the injection device 2. A saturated solution of calcium carbonate which easily forms crystals such as hydroxides or carbonates by the action with water in the ground 1 and which is stable for a long time and hardly deteriarates is used for the penetrating material 4. It increases an adhesive force by connecting mutually sand particles in the ground with calcium carbonate or the like. After the penetrating material 4 has been injected, the material 4 penetrated from the peripheral ground or the boring an into the ground 1 is recovered by a vacuum compressor or the like provided with the suction device 3. |
