| 摘要 |
A pile and method piling in which a central tube 9 extends lengthwise of the pile. A lower part of the tube may be surrounded by a filler material 10 (figure 3a), such as concrete, in contact with the surrounding ground 11 and an upper part of the tube 9 may be surrounded by a protective section comprising an outer sleeve 12 (figure 3a) and an inner sleeve 13 (figure 3a). The inner sleeve is spaced from the tube 9 and the filler material fills the gap therebetween. Opposed surfaces of the sleeves provide a slip surface that allows the outer sleeve to slide up and down the inner sleeve to accommodate movement of the ground, for example due to frost and temperature related heave of the ground, surrounding the upper part of the pile shaft. The tube may be left hollow or may be filled with concrete or a timber core 23 (figure 9). The pile may be filled via the tube 9 so that it fills from the bottom upwards. It may also have apertures or filling holes 19 (figure 6). |
