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地下结构采用逆作法施工日益普遍,由于建筑功能改变,对其进行加固改造有别于常规技术。以某逆作法施工的地下结构改造项目为例,介绍了改造施工中的难点和应对措施,形成了针对逆作法施工的地下结构的整套改造技术:既有基础底板结构加固、既有逆作法柱增大截面加固、地下室增设夹层和坡道及地下室顶板拆除和更换,为今后同类项目改造提供借鉴。
The construction of underground structures by counter-measures is becoming more and more common. Due to the changes of building functions, the reinforcement and modification of the underground structures is different from the conventional technologies. Taking a retrofit underground construction retrofit project as an example, the difficulties and countermeasures in retrofit construction are introduced, and a complete retrofit technology of underground structure for reverse construction is formed: Increase the cross-section reinforcement, addition of basement mezzanine and ramps and basement roof removal and replacement for the transformation of similar projects in the future to provide reference.