| 摘要 |
<p>. A pile which is to be set into a hole excavated below the permafrost level in the ground, comprising a prefabricated plastic pipe which constitutes a permanent formwork for a cast concrete pile. A second pipe surrounds coaxially the plastic pipe dimensioned such that an annular space is formed between the two pipes. The annular space between the two coaxial pipes is filled by a sleeve of elastic material, preferably plastic foam. The sleeve is slideable relative to at least one of the adjacent pipes, and preferably, relative to both pipes.</p> |
