摘要
预应力混凝土连续梁桥广泛应用于跨河流、山谷、公路、铁路的桥梁设计中。上跨铁路构造物一般跨度较大,施工工艺较为复杂;电气化铁路接触网电压高达2.75万V,施工时安全风险高,根据跨铁路既有线施工安全管理规定的要求,必须设置具有防高空坠物及防电绝缘的防护装置。以高月塘大桥为工程实例,详细介绍了墩顶临时固结方案设计与施工,以及防护方案比选,包括移动吊挂式防护平台方案设计与施工工艺。
Prestressed concrete continuous girder has been used in design of bridges across river,valley,road and railway comprehensively. The construction across railway usually has long span and its construction is complex. The contact wire of electrified railway reaches 27 500 volt,so its security risk is very high. According to the construction security administrative provisions across exiting railway,protecting devices and insulator arrangement must be set up. Combined with the case study of Gaoyuetang Bridge,this paper introduces the construction techniques of the temporary rigid connection on pier top and the mobile suspension type protecting stand in details.
出处
《施工技术》
CAS
北大核心
2016年第11期46-49,共4页
Construction Technology
关键词
桥梁工程
预应力混凝土
既有铁路
连续梁
防护平台
施工技术
bridges
prestressed concrete
existing railway
continuous girders
protection platforms
construction
