Vishnugad Pipalkoti HE Project is one of the major ongoing Project in the state of Uttarakhand, Chamoli District. This has been designed to generate 444MW by harnessing hydro power potential of mighty Alaknanda River. Three Desilting Chambers each with a size of 390 m (L) × 16 m (W) × 21.5m (H) designed to eliminate suspended sediments from the water conductor- system and minimize the entry of sediments to powerhouse and to ensure the safety and longevity of the turbines and other under- water parts. Construction of these closely spaced chambers and connecting tunnels posed numerous challenges due to Difficult rock condition, difficult terrain, and complex layout arrangements.
Author wants to highlight the planning process, construction methodology, innovations adopted, construction of access roads and connecting tunnels, non-availability of space for infrastructure, mitigation measures, execution challenges faced, and on the spot, solution adopted at this remote site. Also wants to share the successful experience of construction of this prestigious project with the field engineers.
Conventional Tunnelling
