(1 北京建工集团有限责任公司, 北京 100055; 2 河北省土木工程灾变控制与灾害应急重点实验室, 廊坊 065201; 3 华北科技学院建筑工程学院, 廊坊 065201)

摘要: 北京工人体育场改造复建工程屋顶为拱壳结构,平面为椭圆形,长轴 271m、短轴 205m,矢跨比 1 / 9. 3,最大悬挑宽度 74m. 针对该拱壳结构施工中面临的结构安装面积大、施工作业面广、高空作业量大、交叉作业多等难题,提出了带中心压力环大开口拱壳内外环同步安装施工方法:首先通过方案比选,确定了受压内环分段安装、主拱肋整根吊装的施工方案. 其次对施工过程中的关键技术进行了介绍,详细说明了内、外环的分段原则和施工中的稳定性控制措施,并通过 MIDAS Gen 对主拱肋吊装进行了模拟验算、对钢结构合拢过程中的温度应力进行了分析. 经过研究和现场实践证明,受压内环、受拉外环同时施工,吊装作业无交叉,提高了施工效率. 采用地面分段拼装,超大吨位吊装的方式,减少了高空焊接作业工作量的同时,提高了安装精度. 采用本方法组织施工,构件受力合理,施工安全可靠.

关键词: 北京工人体育场; 大开口; 大跨度; 拱壳结构; 隔震支座; 分段安装; 同步施工

中图分类号:TU745. 2 文献标志码:A 文章编号:1002-848X(2023)06-0018-08

DOI:10. 19701 / j. jzjg. ZJ220108

Key technology for construction of large-span open single-layer arch shell steel structure in Beijing Workers Stadium

WANG Meng1, LI Xin1, JU Zhu2,3, GUO Yaxing1

(1 Beijing Construction Engineering Group Co. , Ltd. , Beijing 100055, China; 2 Hebei Key Laboratory of CivilEngineering Catastrophe Control and Disaster Emergency Response, Langfang 065201, China; 3 Architectural EngineeringCollege, North China Institute of Science and Technology, Langfang 065201, China)

Abstract: The roof of the reconstruction project of Beijing Workers Stadium is an arch shell structure with an oval plane,271m long, 205m short. The rise-span ratio is 1 / 9. 3 and the maximum overhang width is 74m. In view of the problemsfaced in the construction of the arch shell structure, such as large structure installation area, wide construction operation,large high altitude work volume, loads of cross-works, a synchronous installation and construction method of inner and outerring for large open arch-shell with central pressure ring was proposed. Firstly, through the comparison and selection of theschemes, the construction schemes for the sectional installation of the compression inner ring and the hoisting of the wholemain arch-rib were determined. Secondly, the key technologies in the construction process were introduced. The sectiondividing principle of the inner and outer rings and the stability control measures during construction were described indetail, and the simulation calculation of the main arch-rib hoisting was carried out by MIDAS Gen, and the temperaturestress during the steel structure closing process was analyzed. Through research and field practice, it proved that themethod of using pressure ring and tension ring construction at the same time makes hoisting operation without crossing, andalso improves the construction efficiency. The method of ground sectional assembly and super-large tonnage lifting canreduce the workload of high altitude welding operation and improves the installation accuracy. Using this method, the stressof components is reasonable and the construction is safe and reliable.

Keywords: Beijing Workers Stadium; large opening; large-span; arch shell structure; isolation bearing; sectionalinstallation; synchronous construction

第一作者:王猛,学士,高级工程师,主要从事大型体育场馆施工技术研究,Email:13693637969@ 163. com.

[引用本文] 王猛,李欣,鞠竹,等. 北京工人体育场大跨度开口单层拱壳钢结构施工关键技术[ J]. 建筑结构,2023,53(6):18-25. WANG Meng,LI Xin,JU Zhu,et al. Key technology for construction of large-span open single-layerarch shell steel structure in Beijing Workers Stadium[J]. Building Structure,2023,53(6):18-25.