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Title: Hydro-mechanically coupled finite-element analysis of the stability of a fractured-rock slope using the equivalent continuum approach: a case study of planned reservoir banks in Blaubeuren, Germany

Abstract

Construction works associated with the building of reservoirs in mountain areas can damage the stability of adjacent valley slopes. Seepage processes caused by the filling and drawdown operations of reservoirs also affect the stability of the reservoir banks over time. The presented study investigates the stability of a fractured-rock slope subjected to seepage forces in the lower basin of a planned pumped-storage hydropower (PSH) plant in Blaubeuren, Germany. The investigation uses a hydro-mechanically coupled finite-element analyses. For this purpose, an equivalent continuum model is developed by using a representative elementary volume (REV) approach. To determine the minimum required REV size, a large number of discrete fracture networks are generated using Monte Carlo simulations. These analyses give a REV size of 28 × 28 m, which is sufficient to represent the equivalent hydraulic and mechanical properties of the investigated fractured-rock mass. The hydro-mechanically coupled analyses performed using this REV size show that the reservoir operations in the examined PSH plant have negligible effect on the adjacent valley slope.

Authors:
 [1];  [2]; ;  [3];  [1];  [3]
  1. Chinese Academy of Sciences, Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics (China)
  2. Zhejiang University, College of civil engineering and architecture, Engineering Research Center of Urban Underground Development of Zhejiang Province (China)
  3. RWTH Aachen University, Department of engineering geology and hydrogeology (Germany)
Publication Date:
OSTI Identifier:
22780876
Resource Type:
Journal Article
Journal Name:
Hydrogeology Journal
Additional Journal Information:
Journal Volume: 26; Journal Issue: 3; Other Information: Copyright (c) 2018 Springer-Verlag GmbH Germany, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1431-2174
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; COMPUTERIZED SIMULATION; DRAWDOWN; FEDERAL REPUBLIC OF GERMANY; FINITE ELEMENT METHOD; FRACTURES; HYDRAULICS; MECHANICAL PROPERTIES; MONTE CARLO METHOD; MOUNTAINS; PUMPED STORAGE POWER PLANTS; ROCKS; VALLEYS; WATER RESERVOIRS

Citation Formats

Song, Jie, Dong, Mei, Koltuk, Serdar, Hu, Hui, Zhang, Luqing, and Azzam, Rafig. Hydro-mechanically coupled finite-element analysis of the stability of a fractured-rock slope using the equivalent continuum approach: a case study of planned reservoir banks in Blaubeuren, Germany. United States: N. p., 2018. Web. doi:10.1007/S10040-017-1694-X.
Song, Jie, Dong, Mei, Koltuk, Serdar, Hu, Hui, Zhang, Luqing, & Azzam, Rafig. Hydro-mechanically coupled finite-element analysis of the stability of a fractured-rock slope using the equivalent continuum approach: a case study of planned reservoir banks in Blaubeuren, Germany. United States. doi:10.1007/S10040-017-1694-X.
Song, Jie, Dong, Mei, Koltuk, Serdar, Hu, Hui, Zhang, Luqing, and Azzam, Rafig. Tue . "Hydro-mechanically coupled finite-element analysis of the stability of a fractured-rock slope using the equivalent continuum approach: a case study of planned reservoir banks in Blaubeuren, Germany". United States. doi:10.1007/S10040-017-1694-X.
@article{osti_22780876,
title = {Hydro-mechanically coupled finite-element analysis of the stability of a fractured-rock slope using the equivalent continuum approach: a case study of planned reservoir banks in Blaubeuren, Germany},
author = {Song, Jie and Dong, Mei and Koltuk, Serdar and Hu, Hui and Zhang, Luqing and Azzam, Rafig},
abstractNote = {Construction works associated with the building of reservoirs in mountain areas can damage the stability of adjacent valley slopes. Seepage processes caused by the filling and drawdown operations of reservoirs also affect the stability of the reservoir banks over time. The presented study investigates the stability of a fractured-rock slope subjected to seepage forces in the lower basin of a planned pumped-storage hydropower (PSH) plant in Blaubeuren, Germany. The investigation uses a hydro-mechanically coupled finite-element analyses. For this purpose, an equivalent continuum model is developed by using a representative elementary volume (REV) approach. To determine the minimum required REV size, a large number of discrete fracture networks are generated using Monte Carlo simulations. These analyses give a REV size of 28 × 28 m, which is sufficient to represent the equivalent hydraulic and mechanical properties of the investigated fractured-rock mass. The hydro-mechanically coupled analyses performed using this REV size show that the reservoir operations in the examined PSH plant have negligible effect on the adjacent valley slope.},
doi = {10.1007/S10040-017-1694-X},
journal = {Hydrogeology Journal},
issn = {1431-2174},
number = 3,
volume = 26,
place = {United States},
year = {2018},
month = {5}
}