体外预应力体系程应用实例

体外预应力的概念和方法来源于法国,早期体外预应力体系由于尚不完善,并且存在耐腐蚀防护和构造等方面的缺陷。因此,体外预应力在工程中的应用不能显示其优越性,一度使得这项技术停滞不前。但随着无粘结预应力和斜拉索的迅速发展为体外预应力体系的应用带来了生机,特别是在最近二十年中,体外预应力体系在国外应用在大量工程中。下面就体外预应力体系发展过程中一些有代表性的工程进行举例说明,以便对体外预应力有进一步的了解。

An application example of external prestressing system process

The concept and method of external prestressing originated from France, but the early external prestressing system was not perfect, and there were defects in corrosion resistance, protection and structure. Therefore, the application of external prestressing in engineering can not show its superiority, which once made this technology stagnant. However, with the rapid development of unbonded prestressing and staying cables, the application of external prestressing system has brought vitality, especially in the last two decades, external prestressing system has been applied in a large number of projects abroad. The following are some representative projects in the development process of external prestressing system to illustrate, in order to have a further understanding of external prestressing.