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本文作者介绍了某在建高层结构钢筋砼柱由于施工质量问题而采取局部置换和外加砼围套加固设计和施工。采用此法加固，可确保施工阶段和使用阶段的结构安全。
The author of this paper introduced the design and construction of a reinforced concrete stringer under construction with partial replacement and external reinforcement. Reinforcement with this method can ensure the structural safety during the construction phase and the use phase.