In reconstruction projects, many aspects should concerned in utilizing old equipments, such as technical support, resource utilization, and economic feasibility, upgrade support. In the course of construction, it is different between the extension project and the new one. An effective project management system in extension project is adopted.% 在改扩建项目中，对于利旧的部分，从资源利用的可行性、技术支持、经济可行性、升级配套四个方面进行分析，并在工程施工过程中，针对利旧改扩建项目与新建项目的工程管理方面的不同，执行相应的有效管理，形成适合利旧改扩建项目的工程管理体系。
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