Problem Analysis and Geotechnical Study at Sengulam Augmentation Scheme
A diversion tunnel was designed as a part of Sengulam Augmentation Scheme to increase the storage in an already existing reservoir at Sengulam, by transferring water available at Kallar River Basin. Adverse problems encountered during tunnelling caused a delay in the progress of the construction work. Completely weathered zones and four sets of shear zones are the geological adversities present in the rock mass that caused different types of failure during driving of the tunnel. The present paper deals with the problem analysis and geotechnical study of the tunnel and suggestion of suitable preventive measure for tunnel collapse.
KeywordsSengulam Augmentation Scheme Diversion tunnel Tunnel collapse Preventive measures
- 1.Wu, S., Wang, G. (2011). Rock mechanical problems and optimization for the long and deep diversion tunnels at Jinping II hydropower station. Journal of Rock Mechanics and Geotechnical Engineering.Google Scholar
- 2.IS 15026. (2002). Tunnelling methods in rock masses-guidelines.Google Scholar
- 3.Bayati, M., Hamidi, J. K. (2017). A case study on TBM tunneling in fault zones and lessons learned from ground improvement Technology. Tunnelling and Underground Space Technology.Google Scholar
- 4.Chacko, A., Padanattail, A., Gopan, A., Veenugopal, C., Fasnamol, T. M. (2014). A case study on failure of a tunnel intake. Journal of Engineering Research and Applications. Google Scholar