| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection method of grout into the existing structure foundation ground injecting the grout suitable for ground improvement in the foundation ground under the existing structure without causing harmful variation in the existing structure and its device. SOLUTION: When the grout 15 suitable for ground improvement by using an injection means 2 for the foundation ground 13, the foundation ground 13 and variations in a foundation floor slab 9 of the existing structure 8 are monitored by making use of a variation detecting means 3 to properly adjust injection pressure and, at the same time, the pumping of ground water 14 is carried out by making use of a pumping means 6 so that the groundwater-head of the foundation ground 13 can be stored within a predetermined range in parallel with these operations to carry out the ground improvement of the foundation ground 13 without causing harmful variation in the existing structure 8. COPYRIGHT: (C)2005,JPO&NCIPI
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