| 摘要 |
A section forming part of a steel core pile has one end part with a first device working in conjunction with another device belonging to a second endn part of a second section. A second end part of the second section has a second deviec for working in conjunction with a first device belonging to one end part of a third section. The first and second devices are arranged for a simple and easily releasable union with each other. The union allows longitudinally directed striking forces applied to the sections to produce a plastic material deformation and/or a clamping effect. The simple union evolves into one which is fixed and difficult to take apart, under the effect of vibration forces, as caused by the application of striking force. |
