| 摘要 |
PURPOSE:To shorten a term of works, by a method wherein, after bedrock is excavated, an inner form is secured, and after an outer form is installed so that the inner form is not affected by a load applied on the outer form, the excavated bedrock is refilled, and a gap between the inner form and the outer form is filled with concrete. CONSTITUTION:A pit sheathing plate 13 is driven to form pits 2 and 12, and bedrock 1 is excavated from the pit 2 to form a line. After piles 3 are driven in an excavation bed, foundation materials 4 are levelled to roller-compact the materials. Brackets 5 are mounted to the heads of the piles 3, and after an internal form 7 is tightened by means of an inner form tightening band 6 and secured at a given gradient and in a given direction, an outer form 8 is placed so that it covers the inner form 7. After a gap 9 between the inner form 7 and the outer form 8 is filled with concrete or mortar and it is cured, refilling is effected by means of sand or earth 10 of good quality. |
