Managing geological problems during construction of hydro power tunnels in India with special reference to Himalayas
Tunnelling is one of the most challenging activities in hydro power construction.The tunnel construction needs meticulous planning as it involves huge investment and has a direct impact on the completion schedule of the project.Quality Survey & investigations can help in assessment of prob lems/risks before taking up the construction and making adequate provision in the contract to handle the same.In India, several long hydropower tunnels have been constructed in Himalayas.It is always a challeng ing task due to uncertain, difficult, extremely variable and complex geological conditions emerging out of mountain building processes.Moreover, extremely rugged, densely forested, and inaccessible topography limit the scope for investigation which finally becomes a cause of concern during execution due to geo logical problems like sudden ingress of water, interception of shear/fault zones, negotiating low vertical and lateral cover zones, high stress conditions inside tunnel resulting in rock bursting and squeezing, high temperature condition inside tunnels, emission of noxious gases etc.These problems can be effectively handled by pragmatic contractual provisions, efficient construction management and excellent profes sional understanding between site geologists, construction engineers, designers & contractors.Here, I will share my experiences with geological explorations and their limitations resulting in geologi cal problems during execution of some of the important hydropower tunnels in India in the Himalayan belt and mitigative measures adopted to manage these problems.
Gopal Dhawan
Mineral Exploration Corporation Ltd.,Nagpur,India
国际会议
International Symposium and 9th Asian Regional Conference of IAEG(第9届IAEG亚洲区域会议)
北京
英文
231-240
2013-09-23（万方平台首次上网日期，不代表论文的发表时间）