I have been involved by the Government of India and the Royal Government of Bhutan in construction and commissioning of 720 MW Mangdechhu Hydroelectric Project in Bhutan. I started this project from blueprint stage and brought near to commissioning in optimum cost and time. The completion cost of the project shall be around Rs.5270.911 Cr. This project is totally funded by the Government of India.
I have gone through lot of technical complexities during execution of various projects in India and Bhutan. Most of the technical problems were related to geo-technical and rock mass behaviour.
In the present project, we came across the shear zones of varying thickness in the Underground Power House and Transformer Caverns on both the walls but the shear zones were tackled in-situ. Before going to rock support review, the entire cavern was analyzed through numerical modeling and accordingly it was instrumented.
Similar to above,, we have also faced the reasonable seepage issue below the upstream coffer dam placed in the Concrete Dam area. Here, the concrete cutoff wall was placed in place of permeation grouting and the seepage was arrested in absolute manner.
Deep slope cuts are also one of the biggest challenge these days and successful excavation is required well thought analysis and thereafter, placement of rock supports including cable anchors.
With proper analysis and planning, my project succeeded in cutting the slopes of the abutments of the concrete dam and also a deep cut in the pothead yard of the project.