复杂环境下上跨高速公路地铁高架桥施工关键技术  

Key Construction Technology of Metro Viaduct Crossing over Expressway in Complex Environment

作　　者：刘琳[1] 黄峰[2] 刘勇 LIU Lin;HUANG Feng;LIU Yong(Jiangsu Union Vocational and Technical College Nanjing Engineering Division,211135,Nanjing,China)

机构地区：[1]江苏联合职业技术学院南京工程分院,南京211135 [2]中建八局第三建设有限公司,南京210046 [3]南京市市政工程质量安全监督站,南京210036

出　　处：《城市轨道交通研究》2021年第9期121-126,共6页Urban Mass Transit

摘　　要：南京地铁S9号线一节点控制性连续梁桥处在软弱地基和中风化凝灰岩两种极端差异地质条件下,上跨S243省道、下穿220kV高压线,且施工期处于冬季低温季节,施工环境极为复杂。针对该悬臂浇筑连续梁施工过程中存在的难点,通过技术研究,开发出一套关键施工技术,包括新型的0#块支架体系以及挂篮防护蒸养一体化系统,搭配以空间需求较小的三角挂篮及平头塔吊,顺利解决了在复杂地质条件以及狭小作业空间情况下,挂篮跨路安全防护以及冬季蒸养等施工难题。A node controlled continuous beam bridge of Nanjing Metro Line S9 is located in two extremely different geological conditions:weak foundation and moderately weathered tuff.It spans across S243 provincial highway and under-passes 220 kV high-voltage line,and construction period is during low temperature season of winter.The construction environment is extremely complex.In view of the difficulties existing in the construction process of cantilever casting continuous beam of the bridge,a set of key construction technologies has been developed through technical research,including a new type of 0#block support system and the integrated system of basket protection and steam curing,coming with triangle hanging basket and flat head tower crane with small space demand.The problems of safety protection of hanging basket crossing road and steam curing in winter construction under complex geological conditions and narrow working space are solved successfully.

关 键 词：地铁高架桥 上跨高速公路 挂篮施工 新型0#块支架体系 挂篮防护蒸养一体化系统 

分 类 号：U215[交通运输工程—道路与铁道工程]