Beas Sutlej Link Project : A Geotechnical Record : Geological Survey of India Bulletin No: 57

Contents Introduction. History of the project. Regional geology. Structure and tectonics. Seismicity. I. Geomorphology and hydrogeology 1. Geomorphology. 2. Study of river terraces. 3. Hydrogeology. II. Site geology geotechnical problems explorations and remedial measures 1. Pandoh Baggi and diversion tunnels combined intake structures. 2. Diversion tunnel. 3. Pandoh Dam and Spillway. 4. Pandoh Baggi Tunnel. 5. Baggi control works and powerhouse.6. Sundernagar Hydel Channel. 7. Pung balancing reservoir. 8. Sundernagar Sutlej Tunnel. 9. Dehar power plant and appurtenances. 10. Surge shaft. 11. Dehar by pass. 12. Penstock. 13. Powerhouse. 14. Approach road. 15. Switch yard. 16. Cable tunnel. III. Bridge sites 1. Pandoh Bridge Site. 2. Suketi Bridge Site. 3. Ghagas Jamthal and Slapper Bridge Sites. IV. Tunnel support and lining. V. Drainage. VI. Construction material 1. Pandoh Area. 2. Sundernagar Area. 3. Slapper Area. VII. Anticipated post construction problems 1. Pandoh Dam and Spillway. 2. Pandoh Baggi and Sundernagar Sutlej Tunnels. 3. Powerhouse. Locality index. References. From the Preface The Geological Survey of India has done a comprehensive geological work from the reconnaissance stage to construction stage during the period from 1956 to 1977. The arduous geological conditions due to lithological heterogeneity coupled with complex structures were not conducive for the 37.29 km long 255 cumecs capacity tunnel/channel. Some position of the tunnel had to negotiate very difficult flowing and squeezing conditions. Special tunneling techniques were adopted in crushed kaolinised area and crushed granites and adequate drainage was provided with grouting. 82 pp.…