桥梁抗倾覆加固措施实践与应用研究OA

To address the practical problems of prone to lateral overturning of single-column pier bridges under ec-centric loads,an anti-overturning reinforcement measure centered on pier column section enhancement and beam-end restraining devices is proposed in this paper.Firstly,the reinforcement measure involves enlarging the cross-section of original pier columns to improve the flexural rigidity;Secondly,steel limiting devices in installed at the end of the beam to restrain lateral displacement;At the same time,the synchronous jacking technology is applied to replace and set new tension-resistant bearings to ensure construction safety by full-process strain and displacement monitoring.Results show that the reinforcement measures significantly improve the anti-overturning safety coeffi-cient without altering the original structural force system.The real bridge verifies that the critical transverse over-turning load is increased by about 35％,and the lateral displacement at beam ends is effectively controlled within 5 mm.The proposed reinforcement measures features minimal construction disturbance and strong reversibility,of-fering a reliable solution for similar single-column pier bridges.