Volume 39 Issue 4
Apr.  2024
Turn off MathJax
Article Contents
Jianhong Zhang, Peizhao Wang, Wenyan Zhao, Qiang Wang, Daxian Chen, Wenzhi Pan, Weiqing Wang. Research on Key Techniques of Unsupported Construction of Three-Way Grid Structure[J]. STEEL CONSTRUCTION(Chinese & English), 2024, 39(4): 41-48. doi: 10.13206/j.gjgS240201
Citation: Jianhong Zhang, Peizhao Wang, Wenyan Zhao, Qiang Wang, Daxian Chen, Wenzhi Pan, Weiqing Wang. Research on Key Techniques of Unsupported Construction of Three-Way Grid Structure[J]. STEEL CONSTRUCTION(Chinese & English), 2024, 39(4): 41-48. doi: 10.13206/j.gjgS240201

Research on Key Techniques of Unsupported Construction of Three-Way Grid Structure

doi: 10.13206/j.gjgS240201
  • Received Date: 2024-02-01
    Available Online: 2024-05-31
  • Publish Date: 2024-04-22
  • The space grid structure is increasingly utilized in modern architecture due to its unique architectural design. With the growing complexity of space grid structure and the main structure below it, the structural installation technology is continuously improving and evolving. For a single-layer three-way grid structure with a complex lower supporting structure, the conventional method of installing insitu block installation using temporary supporting frameworks or erecting full-height scaffolding for high-altitude bulk installation poses challenges such as excessive measures, high costs, and long dismantling times. New construction methods like hydraulic overall synchronous lifting, jacking, and skidding not only face issues of cost and efficiency but also involve higher construction difficulty. Addressing the mentioned issues, the key technology of unsupported construction is studied, taking the saddle-shaped single-layer three-way grid dome structure in the sunken plaza of Shenzhen’ s “ Internet+” Future Science and Technology City Lot DY01-04 as an example, aiming to achieve fewer temporary support measures and increased construction efficiency. Unsupported construction involves using a specific blocking method to fully utilize the previous lifting unit as the support structure for the next unit and complete the installation in a staggered manner without temporary support. The key to the construction is that each block divided by the specific blocking method can form a stable structural system with the previous installation structure post-lifting completion, preventing excessive displacement and stress compared to the one-time design pattern. Through simulation analysis of the entire construction process and onsite monitoring data, and considering safety, convenience, and cost-effectiveness of the construction process, a comparative study of three unsupported construction methods-spiral, unidirectional staggered, and symmetric staggered is conducted. The study indicates that unsupported construction for single-layer three-way grid structures is safe, reliable, and close to the design state in terms of structural stress and deformation after completion, with minimal overall structural stress and no stability issues in the construction process of the ring girder, showing sufficient safety margin. Unsupported spiral construction has a shorter segment length, better structural stress and deformation of the total structure compared to unsupported interlocking construction, while unsupported symmetric staggered construction effectively reduces the additional stress and deformation caused by the “ see-saw ” effect in the construction process, making it superior to unsupported unidirectional staggered construction. By placing deformation and stress monitoring points where simulated structural displacements and stresses are significant, monitoring the structural deformation and stress during the construction process reveals that the actual structural deformation and stress align closely with MIDAS simulation and analysis results in trend and numerical value, demonstrating the rationality of the unsupported spiral construction scheme.
  • loading
  • [1]
    刘佳庆.单层网壳钢结构的吊装和支撑方法研究[D].西安:西安工业大学,2020.
    [2]
    刘克田,刘康康,刘芷维,等.空间非对称NURBS双曲斜交单层网壳屋盖结构施工技术[J].建筑钢结构进展,2022,24(3):99-104.
    [3]
    罗尧治,胡宁,沈雁彬,等.网壳结构"折叠展开式"计算机同步控制整体提升施工技术[J].建筑钢结构进展, 2005, 7(4):30-35.
    [4]
    魏华强,卢继山,杨宇宁.超大单层双曲薄壳屋盖结构整体顶升技术[C]//第七届全国钢结构工程技术交流会论文集.杭州:2018:1-3.
    [5]
    田云生,刘楚明,杨亚坤,等.大跨度铝合金单层网壳穹顶结构"外扩式"施工技术[C]//2022年全国土木工程施工技术交流会论文集(上册). 2022:629-632.
    [6]
    张骁雄,任鹏,徐纲.单层曲面网壳钢结构屋面施工技术[J].建筑施工,2019,41(8):1480-1482.
    [7]
    高明德.唐山勒泰中心大跨度屋面单层网壳施工方案优选[J].施工技术,2016,45(10):26-29.
    [8]
    雷克,杨沐霖,张营营,等.树状柱支承单层箱型空间网壳逆作法施工技术[C]//第七届全国钢结构工程技术交流会论文集.杭州:2018:187-193.
    [9]
    石开荣,吕俊锋,姜正荣,等.复杂高层悬挂结构施工过程模拟分析及监测研究[J].工业建筑,2017,47(4):134-139.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (57) PDF downloads(12) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return