摘要
通过分析现代铁路桥梁支座更换技术的现状,依托沪宁城际(高铁)虹桥联络线特大桥支座病害治理工程,提出了一种在正常运营条件下的高速铁路桥梁支座更换技术。通过支座病害的现场调研,方案比选、理论分析及有限元计算,得到了梁体在支座更换过程中的受力状态,制定了正常运营条件下的高速铁路桥梁支座更换的施工方案。结果表明:采用新型支座更换技术,在正常运营条件下,线路中心线位置最大竖向位移约0.7 mm,梁体支座局部第一主应力(压应力)6.0 MPa,第三主应力(压应力)23.3 MPa,均小于规范值33.5 MPa,完全满足正常运营条件下的支座更换要求。
New bridge bearing replacement technology is proposed by analyzing the current situation of bearing replacement technology of high-speed railway which has been used to the bridge support diseases repair project of Hongqiao interconnection in Shanghai-Nanjing Intercity High-speed Railway. Through on-site investigation of bearing diseases,beam＇s stress state in the bearing replacement process is gotten by scheme comparison,theoretical analysis and finite element calculation,and bearing replacement construction plan is also established. Results show that the maximum vertical displacement in the centerline position is about 0. 7 mm,the first principal stress（ compressive stress） reaches 6. 0 MPa,the third principal stress（ compressive stress） reaches 23. 3 MPa,and they are smaller than the specification value（ 33. 5 MPa）,this result meets the bearing replacement requirements under normal operating conditions.
出处
《铁道建筑技术》
2017年第2期40-44,49,共6页
Railway Construction Technology
关键词
高速铁路
桥梁工程
运营状态
支座病害
支座更换
high-speed railway
bridge engineering
operational condition
bearing disease
bearing replacement
