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把长的预制预应力混凝土桩分段制造,在使用时进行现场连接有许多优点,例如容易运输、运输过程中受到损坏的危险性小和运输费用较低等。但是,使用短桩必须解决能牢固地把各段短桩连接在一起的问题。瑞典为了成功地利用短桩,研究设计了分段叠接桩的接头连接技术,并且在15年以前就在全世界许多国家中使用。美国一些地区曾大量地使用过这种接头连接技术。在马萨诸塞州埃弗雷特的Boston Edison公司的工程中,又引进了一种称之为Dyn-A-Sphice接头连接技术并用之于支承该工程中废水储罐场基础的预制预应力混凝土桩的连接。
The production of long prefabricated prestressed concrete piles in sections and on-site connections during use have many advantages, such as ease of transport, low risk of damage during transport, and low transportation costs. However, the use of short piles must solve the problem of firmly connecting the short piles together. In order to successfully use short piles, Sweden researched and designed joint connection technology for segmented piles, and it was used in many countries around the world 15 years ago. This joint connection technique has been used extensively in some areas of the United States. In the Boston Edison project in Everett, Mass., a prefabricated pre-stressed concrete pile called Dyn-A-Sphice joint connection technology was used to support the foundation of the wastewater storage tank farm in this project. connection.