The damage of Dlouhe Strane dam lining

1
The damage of Dlouhe Strane dam lining

• Jaromír Ríha, Jana Buchtová
• Water Structures Institute Brno University of
  Technology

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
2
The Dlouhe Strane scheme

• Introduction
• Jeseniky region
• In operation from 1993
• Lower and upper reservoir

• Asphalt facing (upstream sealing)
• 10 years without any problem
• 2002 - upper reservoir - problems with sealing

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
3
The Dlouhe Strane upper reservoir
2002

• 2002the damage and propagation of blisters

2003
2004
Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
4
The Dlouhe Strane upper reservoir

• 2002 2003
• Partial repairs

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
5
Degradation, research

• 2004
• Thousands of blisters
• Partial repairs weren't effective
• Research
• Improper aggregate in AC - basalt
• Severe climate conditions
• Water level fluctuations
• Decision complete reconstruction

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
6
Reconstruction of upper reservoir

• Steps of decision procedure
• Database of reconstructed dams
• Extensive investigation
• chemical structure of grains
• properties of AC
• Two possible technologies
• Asphaltic concrete
• Geomembrane
• Decision process
• FMEA (Failure mode and effect analysis)

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
7
Failure mode and effect analysis

• Checklist of failures
• AC
• GM
• Evaluation

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
8
Failure mode and effect analysis

• Variants
• 0 - current state
• 1.2 AC whole slope
• 1.4 AC slope above 1339 m

• 2.1 GM whole slope
• 2.3 GM slope above 1339 m

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
9
Failure mode and effect analysis

• Results
• Current state
• Reconstruction with AC
• Reconstruction with GM

Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden
10
Thank you for your attention
Dams at the Beginning of the 21st
CenturyInstitute for Hydraulic Engineering and
Applied Hydromechanics TU Dresden