| 摘要 |
PURPOSE:To construct a continuous underground wall on the ground layer defying the use of stabilizer liquid by a method in which an inner drilling excavation is made to complete an upper trench, a casing is set in the trench, the subordinate layer is excavated, concrete is placed, and then the upper trench is embedded with sand. CONSTITUTION:An inner drilling excavation using a crab bucket is made to form an upper trench M1, and an oblong casing 5 is set in the trench. Guide holes 31 and 41 are dug in the subordinate ground layer E2 by an earth auger 11, a lower trench M2 is formed, and concrete C1 is placed. An interlocking pipe 7 is draw out, the portion separated by a partition plate 8 in the trench M1 is refilled with sand S. The casing 5 is removed. The continuous underground wall can thus be constructed even on the ground defying the use of stabilizer liquid.
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