Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

The Dikchu hydropower project is 3 x 32 MW hydro power plant across river Dikchu in Sikkim, India. Dikchu is a tributary of River Teesta, a major river flowing right across Sikkim. The proposed hydro power project site is about 10 km upstream of the confluence of River Dikchu with River Teesta. Two more hydro power projects of NHPC, namely, Teesta Hydro Power Project Stage-IV and Teesta Hydro Power Project Stage-V on the River Teesta, are being commissioned upstream and downstream of the above mentioned confluence. Surface geological mapping indicated that quartzitic phyllite with bands of phyllites shear zones are encountered. The Dikchu HEP consists of Power House Cavern and Transformer cavern .The vertical insitu rock stress corresponds to the gravitational stress while the horizontal stress is much more times the vertical stresses. The rock mass is of fair to good quality as per RMR and Q methods of classification. The design of the underground powerhouse cavern, transformer cavern, has been carried out using two dimensional numerical analysis in phase2 software.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 29th, 12:00 AM May 4th, 12:00 AM

Support System Design of Power House and Transformer Caverns in Dikchu Hydropower Project, Sikkim

Chicago, Illinois

The Dikchu hydropower project is 3 x 32 MW hydro power plant across river Dikchu in Sikkim, India. Dikchu is a tributary of River Teesta, a major river flowing right across Sikkim. The proposed hydro power project site is about 10 km upstream of the confluence of River Dikchu with River Teesta. Two more hydro power projects of NHPC, namely, Teesta Hydro Power Project Stage-IV and Teesta Hydro Power Project Stage-V on the River Teesta, are being commissioned upstream and downstream of the above mentioned confluence. Surface geological mapping indicated that quartzitic phyllite with bands of phyllites shear zones are encountered. The Dikchu HEP consists of Power House Cavern and Transformer cavern .The vertical insitu rock stress corresponds to the gravitational stress while the horizontal stress is much more times the vertical stresses. The rock mass is of fair to good quality as per RMR and Q methods of classification. The design of the underground powerhouse cavern, transformer cavern, has been carried out using two dimensional numerical analysis in phase2 software.