| 摘要 |
<p>Piles for off-shore oil and gas well platforms, are driven into the ground by the extension of a hydraulic jacking cylinder (40). The cylinder, which may be above or below the water surface, is held in position by a working tower or other column (28). The pile, whether one piece or in sections (30) can be contained within the tower or column (28). A plurality of column sections (30) connected end-to-end can serve as the column. Successive pile sections of multi-section pile can be brought into position by securing them to a horizontal loading door (32) of the working tower (28) and then raising the door pivotally. The section is then suspended within the working tower (28) and aligned with the preceding section by an internal alignmenttool (38) prior to welding. Electro-osmosis may be used to reduce soil friction.</p> |
