栈桥大断面框架梁模架支撑关键施工技术  

KEY CONSTRUCTION TECHNIQUE FOR BIG CROSS SECTION FRAME BEAM FORMWORK SUPPORT OF TRESTLE BRIDGE

作　　者：王忠云 李艳春 谢立忠 李忠伟 魏婧怡 闫玉凯 WANG Zhong-yun;LI Yan-chun;XIE Li-zhong;LI Zhong-wei;WEI Jing-yi;YAN Yu-kai(BCEG International Construction Group Co.,Ltd.,100054,Beijing,China)

机构地区：[1]北京国际建设集团有限公司,北京100054

出　　处：《建筑技术》2022年第6期652-655,共4页Architecture Technology

摘　　要：北京城市副中心站综合交通枢纽明挖基坑与东六环高压燃气管线、输油管线交叉施工,为避免施工中的相互影响,现场采用栈桥将明挖基坑与高压燃气、输油管线分隔成2个空间,而栈桥框架梁支撑底部为超厚细砂层,针对传统的支撑底部浇筑混凝土垫层的作法,本项目提出1种支撑底部基础为细砂层的新型模架支撑体系,为今后类似工程遇到此种情况的支撑体系作为参考。Construction of the open excavation Beijing suburban railway sub-center station traffic hub crossed with the construction of east sixth ring road high-pressure gas pipeline and petroleum pipeline.To avoid mutual construction influence of these projects,trestle bridge was set on site to divide the open excavation foundation pit from the high-pressure gas and petroleum pipelines.Considering the super-thick fine sand stratum where the trestle bridge frame beam support bottom is located and compared with traditional construction method which grouts concrete at bottom,this paper proposed a new formwork support system which uses find sand layer to support the bottom foundation,providing references for future similar support system construction.

关 键 词：栈桥 模架 设计 施工 

分 类 号：TU753[建筑科学—建筑技术科学]