| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve efficiency and safety in pipe laying by arranging air bags divided into inner and outer air chambers by a bulkhead in the width and depth directions of a drilled groove and lowering a pipe to be buried by sequentially supplying and releasing air to and from the air bags. SOLUTION: Collapsion of an earth wall is prevented by setting an air bag 7 constituted by dividing it in a hollow triangular support shape into an inside air chamber 7A and an outside air chamber 7B by a bulkhead 8 in two rows in a drilled groove 1 or vertically in multistages, supply air to each of the air bags by a compressor, etc., and expanding the. Additionally, the bulkhead 8 can be vertically provided and formed in a square support shape, too. In case of burying a pipe to be buried in this drilled groove 1, the pipe to be laid is placed on the inside air chambers A, B of the air bag 7 on the top stage, the pipe is lowered by releasing air in the inside air chambers A, B and it is supported by the outside air chambers C, D. Thereafter, it is sequentially lowered by relasing air of the outside air chambers C, D and the inside air chambers E, F. Additionally, the air bag 7 on the upper stage which is finished lowering is expanded by supplying air to it. Consequently, it is possible to safely carry out piping while preventing collapsion of the earth wall.</p> |
