分层坐标控制双层筒式钢塔架安装精度研究  

Research on Installation Accuracy of Double-layer Tubular Steel Tower by Hierarchical Coordinate Control

作　　者：李沛洪 曾凡锐 Li Peihong;Zeng Fanrui(Guangzhou Second Municipal Engineering Company Limited,510060,China)

机构地区：[1]广州市第二市政工程有限公司,510060

出　　处：《特种结构》2024年第6期107-112,共6页Special Structures

摘　　要：为提高钢塔架施工精度,提出采用分层坐标控制法对钢塔架安装精度进行研究。基于BIM技术对双层筒式钢塔架进行细化分层,建立钢塔架各构件模型。钢塔架模型分层主要分为一层钢柱平面、一层外筒、二层外筒、三层外筒、一层塔顶、二层塔顶。针对每个分层体系,选取4个外筒点和2个内筒点作为坐标点,并对坐标点进行反射板粘贴。基于分层坐标方法,辅助钢塔各层位进行安装施工。选取主体钢结构整体立面偏移量和总高度偏差量作为偏差控制因素。观测结果表明,偏差量主要呈现从增大到稳定的阶段,整体立面偏移量最大为19mm,钢结构总高度偏差量最大为20mm。分层坐标法能有效控制钢塔架偏差在合理范围内。In order to improve the construction accuracy of steel tower,the hierarchical coordinate control is proposed to study the installation accuracy of steel tower.Based on BIM technology,the double layered tubular steel tower was segmented and stratified,and the component model of steel tower was established.The layer of steel tower model was mainly divided into one layer of steel column plane,one layer of outer cylinder,two layers of outer cylinder,three layers of outer cylinder,one layer of tower top and two layers of tower top.For each layered system,4 outer tube points and 2 inner tube points were selected as coordinate points,and the reflection plate was pasted on the sitting points.Based on hierarchical coordinate,each layer of steel tower column was installed and constructed.The deviation of the whole facade and the deviation of the total height of the main steel structure were selected as the deviation control factors.The results showed that the deviation mainly presents a stage from increasing to stabilizing,and the maximum offset of the overall facade is 19mm,and the maximum deviation of the total height of the steel structure is 20mm.The hierarchical coordinate method could effectively control the deviation of steel tower in a reasonable range.

关 键 词：钢结构工程 筒式塔架 分层坐标控制 BIM技术 安装精度 

分 类 号：TU393.2[建筑科学—结构工程]