- 摘 要
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(東南大學土木工程學院 南京210096)
【提要】 以南京江寧體育場工程為背景，根據(jù)屋蓋桅桿斜拉索特點及其安裝方法進行了施工平臺設計方案的選型，綜合考慮施工現(xiàn)場狀況、機械設備起重能力、受荷特點及施工平臺結構的安全性與經(jīng)濟性等因素，對四種方案進行了對比評析，最終確定在桅桿頂近75m高的錨箱處搭設高空斜撐式型鋼懸挑施工平臺。施工平臺主要承受移動集中荷載作用，內力計算采用了影響線分析方法，得出內力包絡圖用于桿件截面設計，確保了設計的可靠性。實踐證明該方案可行。
【關鍵詞】 選型 施工平臺 影響線 包絡圖
Formselection,Design and Application of Construction Platform for Mastcable of Jiangning Stadium in Nanjing/Shi Kairong,Guo Zhengxing(College of Civil Engineering,Southeast University,Nanjing 210096,China)
Abstract:Design plan of construction platform is selected according to characteristics and installation method of the cables,which connects the mast to the roof of Jiangning stadium in Nanjing. By comparing and appraising four design plans through comprehensive consideration of correlative factors,such as situation of construction site,capacity of crane,characteristic of load bearing,security and economic feasibility of construction platform,it is concluded that an obliquely supported construction platform with section steel on top of the mast within the height of 75m is built. Since the construction platform mainly
bearing moving forces,analysis method of influence line is adopted in structural internal force calculation. Internal force envelope diagrams are acquired and applied to the section design for structural members,which insure the reliability of design.The plan of construction platform approves to be feasible.
Keywords:formselection; construction platform; influence line; envelope diagram
