关键词: 预应力砼, 系杆拱桥, 数控张拉, 钢管砼

Abstract: The efective prestressing forces of tied anchorage and total prestressing forces of each tie have specific require- merits of precise controlling．Traditional prestressing construction methods could not satisfy the requirements proposed by de- signer．Efective prestressing forces of tied an chorage at one tied-arch bridge have been tested by diferent checking methods in practice．The test results show that efective prestressing forces of tied anchorage produced by traditional construction method have a large bias comparing with designed values．The phenomena of gliding tendon，uneven tendon forces and total tendon forces on the small side are easily caused by traditional prestressing method．Th e normal work statement of tied-arch bridges are threatened bylackof tiedforces.The studyingresults can be used as guidelinesfor designingand constructingthe same type bridges.

Key words: prestressed concrete, tied-arch bridge：numerical controlled prestressing, steel tubular concrete