超高层钢管柱自密实混凝土顶升关键技术研究与应用
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摘要
通过钢管柱自密实混凝土顶升技术在南京世贸中心A楼工程中的成功应用,总结了针对钢管柱混凝土顶升技术的难点和解决方法。通过对钢管柱顶升装置的优化设计,解决了钢管柱顶升装置安装繁琐、速度慢、不能反复使用问题;通过高压泵管向低压泵管转化时对泵管进行了压力测试试验,解决了钢管柱之间连续浇筑问题;通过对混凝土顶升时排泄系统(排浮浆和气)进行了改进,使混凝土泵送更顺畅,解决了混凝土浮浆影响混凝土质量的问题。
Through the successful application of jacking technique for steel tubular columns with self-compacting concrete in the Tower A project of Nanjing World Trade Center, the difficulties and solutions for the concrete-filled steel tubular column jacking technique were summarized. Through the optimized design of the steel tubular column lifting device, the problems that the steel tubular column jacking device was complicated to install, slow, and could not be used repeatedly were solved; the pressure test was carried out on the pump pipes when the high pressure pump pipe was converted to the low pressure pump pipe, so as to solve the problem of continuous pouring between steel pipe columns; the drainage system(discharge slurry and gas) for concrete jacking was improved, which made the concrete pumping smoother and solved the problem that the concrete floating slurry affected the concrete quality.
Through the successful application of jacking technique for steel tubular columns with self-compacting concrete in the Tower A project of Nanjing World Trade Center, the difficulties and solutions for the concrete-filled steel tubular column jacking technique were summarized. Through the optimized design of the steel tubular column lifting device, the problems that the steel tubular column jacking device was complicated to install, slow, and could not be used repeatedly were solved; the pressure test was carried out on the pump pipes when the high pressure pump pipe was converted to the low pressure pump pipe, so as to solve the problem of continuous pouring between steel pipe columns; the drainage system(discharge slurry and gas) for concrete jacking was improved, which made the concrete pumping smoother and solved the problem that the concrete floating slurry affected the concrete quality.
引文
[1] 包晓达.钢管柱混凝土顶升技术[J].上海建设科技,2012(2):58-60.
[2] 张光明.钢管柱混凝土顶升技术的应用[J].天津建设科技,2009,19(1):14-15.
[3] 胡宏亮,沈春华,张波,等.浅谈钢管混凝土顶升的施工技术[J].工业建筑,2012,42(增刊):635-637.
[4] 曹玉生,王卉娜,王东.异形钢管混凝土工程的延性[J].工业建筑,2008,38(增刊):473-475.
[2] 张光明.钢管柱混凝土顶升技术的应用[J].天津建设科技,2009,19(1):14-15.
[3] 胡宏亮,沈春华,张波,等.浅谈钢管混凝土顶升的施工技术[J].工业建筑,2012,42(增刊):635-637.
[4] 曹玉生,王卉娜,王东.异形钢管混凝土工程的延性[J].工业建筑,2008,38(增刊):473-475.