下穿既有铁路桥的装配式公路防护棚施工技术  

Construction technology of prefabricated highway protective shed under existing railway bridge

作　　者：董文杰 张中元 郭德宁 白新宇 袁岗岗 DONG Wenjie;ZHANG Zhongyuan;GUO Dening;BAI Xinyu;YUAN Ganggang(CCCC Second Highway Engineering Bureau Co.,Ltd.,Xi’an 710065,China;ZhongJiao JianJiJiao Highway Investment Development Co.,Ltd.,Shijiazhuang 050091,China;China Communications Investment Co.,Ltd.,Beijing 100000,China)

机构地区：[1]中交第二公路工程局有限公司,陕西西安710065 [2]中交建冀交高速公路投资发展有限公司,河北石家庄050091 [3]中交投资有限公司,北京100000

出　　处：《四川建材》2024年第4期84-87,共4页Sichuan Building Materials

摘　　要：针对公路桥下穿铁路桥带来的公路长期安全运营防护问题,在现有防护棚施工技术分析的基础上,考虑交叉、穿越工程中高空坠落物带来的安全隐患特征,设计了一种装配式钢结构防护棚,详细介绍该防护棚基座、立柱、梁部、顶部、加强措施、安全警示标志的设计方案,然后从施工计划、施工控制要点、施工安全措施三个方面阐述了装配式防护棚的施工要求,在此基础上,提出了防护棚顶面排水系统实施方案,总结了装配式钢结构防护棚的技术特点,从而形成了一套经济、高效的路桥交叉、穿越工程中可长期使用的装配式防护棚施工技术及安全控制方法,可有效避免公路桥下穿铁路桥引起的交通安全事故,对类似交叉、穿越工程的安全防护起到了有效的参考作用,可广泛推广应用。In view of the long-term safe operation protection problem of the highway caused by the highway bridge crossing the railway bridge,based on the analysis of the existing construction technology of the protective shed,and considering the characteristics of the safety hazards caused by falling objects from high altitude in the crossing projects,a fabricated steel structure protective shed is designed.The design scheme of the base,column,beam,top,reinforcement measures and safety warning signs of the protective shed are introduced in detail,and then the construction requirements of the prefabricated protective shed are expounded from three aspects:construction plan,construction control points and construction safety measures.On this basis,the implementation scheme of the drainage system on the top surface of the protective shed is proposed,and the technical characteristics of the prefabricated steel structure protective shed are summarized,thus forming a set of economical and efficient prefabricated protective shed construction technology and safety control methods that can be used for a long time in road bridge crossing and crossing projects,which can effectively avoid traffic safety accidents caused by highway bridges crossing railway bridges.The safety protection of crossing engineering has played an effective reference role and can be widely applied.It is an effective reference for the safety protection of similar crossing and crossing projects and can be widely applied.

关 键 词：下穿工程 装配式 防护棚 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]