As to the traditional nature of existing ultra-high concrete pumping technology and the lack of detailed theoretical guidance,the stress state of the concrete delivery pipe during pumping is studied through a combination of numerical simulation and experimental research.By establishing a detailed numerical model of concrete pumping fluid and a solid numerical model of concrete delivery pipe,fluid-solid coupling calculations are conducted,focusing on exploring the changes and losses of pressure in the flow field during concrete pumping,as well as its impact on the structure of the delivery pipe itself,and it is compared with field experiments.The result shows that the numerical simulation was in good agreement with the experimental data,providing theoretical guidance for the formulation of ultra-high concrete pumping technology solutions.

The T1 tower of the Foreshore Center has a structural height of 195 m, which is a steel frame concrete core tube structure system. In view of the structural characteristics of the core tube and the changes in revenue and expenditure, the combined construction technology of modular hoistway integral steel platform formwork and hydraulic climbing formwork equipment has been developed, and two equipment combination designs, construction processes and methods have been proposed. The combined construction mode of the two equipment has been realized for the first time, which has significantly improved the construction efficiency. The construction period is greatly reduced, which can provide reference for similar super high-rise projects.

针对超高层建筑劲性结构梁柱节点钢筋密集、连接形式复杂等特点,对劲性柱与无梁楼板、劲性柱与混凝土梁、劲性柱与劲性梁、劲性梁上起柱、剪力墙与劲性连梁等节点运用BIM技术进行研究,形成了劲性结构土建深化技术体系,减少了施工作业难度,提高了施工作业效率和质量,保证了结构的安全性及可靠性.研究成果在工程实施过程中得到了成功应用,可为类似工程提供借鉴和参考.

以上海某大型酒店工程项目为背景,分析了工程的特点及难点,阐述了设计、施工过程中BIM技术的应用.通过采用前期建模、碰撞检测、施工方案模拟、进度控制、多方协同等多项技术管理,缩短了施工时间,降低了成本,最终高质量地完成了项目的集成交付(IPD),带来了可观的社会和经济效益.

许多优秀的钢筋混凝土历史建筑年久失修,存在混凝土构件强度普遍偏低、混凝土开裂、钢筋锈蚀铁胀等现象,存在很多安全隐患.加之当初设计时,由于受到材料、技术等诸多因素的影响并未考虑抗震设防要求,对其进行修缮和改建已显得十分必要.本文以上海某历史建筑为例,综合应用锚杆静压桩技术、阻尼器减震技术、外包钢技术、加强梁柱节点和压力灌浆技术,使得结构刚度有较大幅度提高,抗震性能得到了极大改善,为历史建筑的修缮加固提供指导意义.

上海许多优秀的历史建筑由于年久失修,构件损坏严重,承载力严重不足,有些还经历改建、扩建、新建,结构体系混乱,建筑存在很多安全隐患.对上海近代历史建筑中结构安全存在的主要问题和损坏后的加固方法进行了总结,并以上海几处优秀历史建筑为例,介绍了其损害情况,为今后优秀历史建筑的修缮加固提供参考.