南宁万科大厦超高大悬臂空腹桁架施工技术.pdf

2017年8月上 施工技术 第46卷第15期 CONSTRUCTION TECHNOLOGY D0I:10.7672/8js2017150001 南宁万科大厦超高大悬臂空腹桁架施工技术 徐晗，韩超2，陆建飞2，王洪腾2，沈映2 (1.中天建设集团浙江钢构有限公司，浙江杭州310008； 2.中天建设集团有限公司，浙江杭州310020) [摘要]南宁万科大厦南楼高大悬臂空腹桁架结构施工采用钢管支撑立柱组合高大支模架，并结合千斤顶卸载的 施工方式.钢支撑支顶悬挑大梁、高大支模架支顶楼板、千斤顶同步分级卸载，取代传统的满堂支撑架施工方法. 施工过程中通过对大悬臂空腹桁架施工方案设计、施工模拟、施工工艺流程及操作要点等关键技术进行研究，很好 地解决了超高大悬臂空腹桁架结构施工中支撑承载力、整体稳定性不高、截面开裂等技术难题. [关键词]高层建筑；悬臂；空腹桁架；钢支撑；卸载：施工技术 [中图分类号]TU758 [文献标识码]A[文章编号]1002-8498(2017)15-0001-04 Construction Technology of Super-high Large Cantilevered Vierendeel Truss in Nanning Vanke Building XU Han' HAN Chao2 LU Jianfei2 WANG Hongteng? SHEN Ying2 (1.Zhejiang Steel Structure of Zhongtian Construction Group Co.Ltd.Hangzhou Zhejiang 310008 China; 2.Zhongtian Construction Group Co.Ltd.Hangzhou Zhejiang 310020 China) Abstract:The super-high large cantilevered vierendeel truss construction in the south block of Nanning Vanke Building applies posite frame of steel tube supports and formwork supports bined with the jack for unloading construction.The steel support bears cantilevered beam high support frame bears floor and jack is used for synchronous grading unloading to replace the traditional full support of the construction method.During the construction process the key technologies such as design construction simulation construction processing and operation points of the large cantilever fastening truss are studied which can solve the bearing capacity of the super-high cantilevered vierendeel truss structure as well as the ...