| 摘要 |
Removal hollow pile from ground, the pile 1 is closed at its top end using a closure member 4 and pressurised fluid is delivered by a pressurising system 8 and a feed device 5 to the interior of the pile 1, the pressure driving the pile 1 from the ground. The pressure of the fluid can be varied with a higher pressure being first applied to loosen the pile 1 from the surrounding ground and then a lower second pressure applied to maintain movement of the pile 1 out of the ground. While the pile 1 is being driven from the ground, the weight can be taken by a crane 6. |
