Numerical Assessment of Seepage Control Effects of Underground Powerhouse

DOI

10.2991/iceesd-17.2017.32How to use a DOI?

Keywords

underground powerhouse; seepage control; drainage hole array; SVA method; numerical modeling; Yagen Hydropower Station

Abstract

For performance assessment and optimization design of the seepage control system in the Yagen underground powerhouse, a numerical method combining a substructure technique, the variational inequality formulation of Signorini's type and an adaptive penalized Heaviside function (short for SVA method) was adopted. Numerical results of seepage flow behavior in the underground powerhouse area of the Yagen Hydropower Station demonstrate that: the seepage control effects of the layout are very outstanding, and the designed scheme is generally proper and effective; the upper part of the drainage system has little effects in controlling leakage from reservoir, and hence the spacing of the drainage hole arrays at higher elevations can be properly enlarged; the auxiliary drainage hole arrays play an important role in reducing leakage amounts into the underground caverns and pore water pressure in the surrounding rocks, so they are essential for the long-term safe operation of the underground powerhouse.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Huakang Zheng
AU  - Chao Hu
AU  - Qin Shang
PY  - 2017/04
DA  - 2017/04
TI  - Numerical Assessment of Seepage Control Effects of Underground Powerhouse
BT  - Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)
PB  - Atlantis Press
SP  - 171
EP  - 176
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-17.2017.32
DO  - 10.2991/iceesd-17.2017.32
ID  - Zheng2017/04
ER  -