Punatsangchu-1 Hydroelectric Project Authority needed a continuous, integral bridge built across 174 meters over the Punatsangchu River. The bridge, which would connect the national highway and nearby dam, had to support the delivery of large, heavy turbines and transformers to the hydroelectric power project, and enable movement of personnel to and from the project site. The structural design of the bridge had to overcome significant challenges—for example, huge seismic forces impacting the local area.
Tandon Consultants Pvt Ltd was hired to design and construct the INR 100 million bridge. Using Bentley’s STAAD software, designers employed geometric and structural design methods to optimize the materials and construction costs. The company also used a structural system to minimize lifecycle costs, which greatly reduced time and resources required for bridge maintenance.
Construction stage checks were done to ensure the stability of the bridge during the cantilever process. Counterweight, in form of boulders, was put in stages inside the box of end spans. Using STAAD software, designs were carried out according to standard practices in India and approved by Jadhavpur University and government agencies before they were executed by the construction team.
By employing STAAD for analysis and in-house design tools, the project team completed designs efficiently, using minimal design resources. They were also able to optimize the materials used and the overall construction costs.