| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous earth retaining wall constructing method for improving excavating efficiency. SOLUTION: A ditch 74 is excavated in the ground by lowering an excavating tool 28 installed on the lower end of a kelly-bar 26 for vertically moving along a leader erected on an execution work machine main body, and a solidifying material is supplied at excavating time to construct an earth retaining wall. When ditches 74, 78 are continuously formed, an earth wall 76 is left from the already excavated ditch 74, and the next ditch 78 is excavated. After lowering an excavating tool 26 to the bottom of the ditch 78, the excavating tool 28 is expansively opened, and while raising the kelly-bar 26, the ditch 78 is expansively opened/excavated by the excavating tool 28 to be continued with the already excavated ditch 74.
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