| 摘要 |
PROBLEM TO BE SOLVED: To provide earth works executing method available in soft ground, which improves the trafficability of an excavator on the soft ground. SOLUTION: According to the method, soil improvement is carried out by excavating the ground G by an excavating shaft 1, adding a hardener 2 and air bubbles 3 to excavated soil S1 in an excavated hole H, followed by mixing them, to thereby obtain improved soil S2. Then earth works are executed by excavating the improved ground G. The excavating shaft may be formed of a drill rod having a screw, a drill rod having a high-pressure jet ejecting hole formed at the tip thereof, or the like. The hardener may be cement milk, for instance, that can improve the strength of the earth when added to the soil. Preferably the hardener 2 and the bubbles 3 are added directly into the excavated earth S1 in the excavated hole H, and then they are mixed in the same. COPYRIGHT: (C)2005,JPO&NCIPI
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