Turbo Generator Foundation Inside TG Building—An Unconventional Approach

In any power plant, Turbo Generator is the most dynamic as well as the most expensive equipment and placed inside the Turbo Generator building. TG substructure being a dynamic structure conventionally, the foundation system of Turbo Generator and TG building is kept separately. This leads to not only tedious design calculation of TG deck supporting structure and TG building supporting structure but also the extensive requirement of time for carrying out the construction work. Also, the supporting structure for the TG deck is generally made up of concrete columns, which adds more to the construction time. In one of the power plant projects having capacity 600 MW, the analysis and design of the TG substructure were carried out using a structural steel column framework for supporting the TG deck slab of Turbo Generator. The springs which act as a dampener were placed in between the TG deck slab and the steel columns. For the analysis and design, the TG substructure is integrated with TG building. Due to this the structural analysis and design become simple, more space is available compared to the concrete structure, construction time is less compared to the concrete structure and also sustainable when compared to the concrete structure. In this paper, a complete detail design approach has been presented. The 3-D model and analysis were done using STAAD software. The comparison between the supporting system of Turbo Generator with steel column and concrete column has also been presented to find the most desirable system.