naa a22 4500 51075516X CHVBK 20180411083120.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12594-013-0109-4 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0109-4 Engineering geological evaluation of the spillway of dam (II-B) of Bunakha Hydroelectric Project, Chukha Dzong, Bhutan [Elektronische Daten] [A. Naithani, P. Nawani, L. Singh, Devendra Singh] The 200m long and 106.2m wide spillway of Bunakha Hydroelectric Project is proposed at the centre of the dam to pass the flood discharge. The spillway area was investigated through detailed engineering geological mapping, geophysical survey, exploratory drilling and laboratory testing. The rock mass properties, i.e. joint sets, weathering grade, RQD, RMR, permeability, P-wave velocity etc. of the rock masses to be encountered during the excavation of spillway have been analyzed in detail. Core samples from the exploratory drill hole drilled at the spillway alignment were tested for physico-mechanical properties of rocks in the laboratory. The mapping details indicated that the major rock types which are exposed to the surface and cover the entire spillway area are foliated gneisses with bands of banded gneisses. On the basis of detailed investigations and laboratory testing, inferences and recommendations have been made which will be helpful during the construction of the project. Geological Society of India, 2013 Engineering geology nationallicence Dam nationallicence Geophysics nationallicence Permeability nationallicence Spillway nationallicence Bhutan nationallicence Naithani A. National Institute of Rock Mechanics, 563 117, Kolar Gold Fields, India aut Nawani P. NIRM, H.No. 273, Nirvana Country, Sector 49-50, 122 001, Gurgaon, India aut Singh L. National Institute of Rock Mechanics, 563 117, Kolar Gold Fields, India aut Singh Devendra National Institute of Rock Mechanics, 563 117, Kolar Gold Fields, India aut Journal of the Geological Society of India Springer-Verlag 81/6(2013-06-01), 835-843 0016-7622 81:6<835 2013 81 12594 https://doi.org/10.1007/s12594-013-0109-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0109-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Naithani A. National Institute of Rock Mechanics, 563 117, Kolar Gold Fields, India aut NATIONALLICENCE 700 1- Nawani P. NIRM, H.No. 273, Nirvana Country, Sector 49-50, 122 001, Gurgaon, India aut NATIONALLICENCE 700 1- Singh L. National Institute of Rock Mechanics, 563 117, Kolar Gold Fields, India aut NATIONALLICENCE 700 1- Singh Devendra National Institute of Rock Mechanics, 563 117, Kolar Gold Fields, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/6(2013-06-01), 835-843 0016-7622 81:6<835 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer