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公主坟商业大厦结构主体在1998年底施工到±0.000后停工。新的建筑方案是在原有地下主体结构基础上进行改造和新建的,增大了塔楼范围、高度和层数,还在原楼北侧增加了一座塔楼,底盘亦为地下4层,裙房5层且层层与原主体相连。介绍了工程的改造与加层设计,涉及到原有基础底板反梁的利用和加固,已施工完成的地下结构梁、板、柱、剪力墙等的改造加固,预应力构件的改造设计及新旧结构连接部位的设计与构造,新老规范的交替,设计使用年限等。加固方法涉及到加大断面、粘钢、包钢、粘碳纤维、植筋等。
The main structure of Gongzhufen Commercial Building was suspended to ± 0.000 after construction by the end of 1998. The new construction program is based on the original underground structure of the original transformation and new construction, increasing the tower range, height and number of floors, but also in the north side of the original building an additional tower, the ground floor is also 4 floors, 5 podium And layers connected with the original subject. This paper introduces the rebuilding and overlay design of the project, which involves the utilization and reinforcement of the original foundation slab counter-girder, the rebuilding and reinforcement of the underground structural beams, slabs, columns and shear walls which have been completed, the reformation and design of the prestressed components Old and new structure design and construction of the connection site, the old and new specifications of the alternative, design life and so on. Reinforcement method involves increasing cross-section, stick steel, Baotou Steel, carbon fiber, anchorage and so on.