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较之自立式内筒,悬吊式内筒受力合理、节省造价。内筒悬吊的形式可分为分段悬吊和整体悬吊,分段悬吊接头多、渗漏点多、防渗难度大且成本高;整体悬吊接头少、防渗漏设计简单且成本低。本文以印尼INDRAMAYU电厂烟囱为例,介绍了外筒设计优化原则、内筒节点构造措施,并在结构分析时,考虑内外筒共同作用,提出整体式悬吊内筒烟囱的耦合双梁计算模型。本工程取得了较好的技术经济效益,希望对后续类似工程设计有所参考和帮助。
Compared with the free-standing inner cylinder, the inner cylinder is reasonable and can save cost. The form of inner cylinder suspension can be divided into sub-suspension and integral suspension, multi-section suspension joints, multiple leakage points, anti-seepage difficulty and high cost; the overall suspension joints, anti-leakage design is simple and low cost. Taking INDRAMAYU power plant in Indonesia as an example, this paper introduces the principle of outer cylinder design optimization and the construction of inner cylinder nodes. In the analysis of structure, considering the interaction of inner and outer cylinders, a coupled double-girder calculation model of integral suspension inner cylinder chimney is proposed. The project has achieved good technical and economic benefits, hoping to follow-up similar projects for reference and help.