| 摘要 |
PROBLEM TO BE SOLVED: To construct a continuous underground wall, etc., with soil cement speedily and precisely, without much work and without generating industrial waste surplus soil, at a low cost of removing the surplus soil. SOLUTION: Augers 1 are aligned, and the excavation without timbering is executed by air discharge to the depth of about 40% of a prescribed length. Next, the agitation excavation is executed while injecting a curing material to fill the remaining depth of about 60% with a mixing material, and after that, the agitation lifting by the backward rotation is executed while injecting the curing material to fill the depth of several tens of percent of the prescribed length with the mixing material. Then the excavation is executed again by the forward rotation to the prescribed length while injecting the curing material to fill the remaining depth of several tens of percent of the prescribed length with the mixing material in the excavation, and after that, the augers are lifted up.
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