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青岛市麒麟大酒店原设计 33层。1995年 ,因资金问题在 2 0层结构完成后停工。1999年复工后 ,业主要求在已施工完毕的 8～ 17层无粘结预应力楼板上开 80 0 m m× 12 0 0 mm的管道洞口。无粘结预应力筋为环向和径向双向布置。开洞施工流程如下 :各层楼板放出需开洞口位置线→风镐
Qingdao Qilin Hotel was originally designed 33 stories. In 1995, due to financial problems, the construction of the 20-storey structure was suspended. After the resumption of work in 1999, the owner requested to open a 0.80-m x 1200-mm pipe opening on the 8 to 17-storey unbonded prestressed floor slab that has been completed. The unbonded prestressed tendons are bidirectionally arranged in the hoop and radial directions. The construction process for opening a hole is as follows: