重庆鹅公岩大桥西引桥换梁施工

随着城市建设发展，城市桥梁数量日益增多，其在城市交通中的作用也越来越大。同时随着使用时间的增长和各种外在因素的影响，桥梁老化、受损逐渐增多，既有桥梁的维修与加固已倍受业界重视。以重庆鹅公岩长江大桥西引桥换粱工程为依托，比较多种换粱方案对成本、工期、环境、交通的影响及其可行性，选择原位预制横移的方案，有针对性地对换梁平台进行设计，使其同时满足受损梁拆除和新制梁预制、横移的需要，此对城市桥梁的类似换梁施工有很好的借鉴作用。

Beam Replacement Construction of West Approach Bridge of Chongqing Egongyan Bridge

With development of urban construction, urban bridges are increasing with time and show more and more roles in urban traffic. In the meantime with addition of service duration and influences of various external factors, ageing and damage of bridges are gradually increasing, and maintenance and reinforcement of the existing bridges have been paid more attention. On the basis of beam replacement project of the west approach bridge of Chongqing Egongyan Bridge, this paper compares influences of multiple beam replacement plans on cost, construction period, environment and traffic as well as their feasibility, and chooses the in situ cated transverse plan to design beam replacement platform specifically to satisfy the needs for removal of the damaged beams, pre-cast and translation of new beams simultaneously. This plan provides a good reference for similar beam replacement construction of urban bridges.