Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Seepage and water flow is one of the most important factors in design of embankment dams. The seepage through the foundation of earth dams can be controlled using the concrete cut off walls. The hydraulic head reduces in connection zone of the cut off wall and core of the dam that results to high hydraulic gradients. As a result, erosion and water leakage may occur. In this regard, the design of concrete cut off wall connection to the clayey core of earth dam is important. In this research, the total flow and the hydraulic gradient are considered to study the seepage through different cut off wall connection systems. The Karkheh storage dam with a plastic concrete cut off wall is selected for the seepage analysis. Six different connection systems are modeled and the effect of physical and mechanical factors like, the cut off wall permeability and the geometry of the connection systems on the total flow and the maximum hydraulic gradient are investigated. The connection systems with minimum flow and hydraulic gradient are determined. According to the results, the cut off wall connection system is an important part that affects the flow in earth dams. In this regard, the connection system with the most effective characteristics and suitability in construction is determined.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Seepage Through Different Concrete Cut Off Wall Connection Systems Case Study: Karkheh Storage Dam

Arlington, Virginia

Seepage and water flow is one of the most important factors in design of embankment dams. The seepage through the foundation of earth dams can be controlled using the concrete cut off walls. The hydraulic head reduces in connection zone of the cut off wall and core of the dam that results to high hydraulic gradients. As a result, erosion and water leakage may occur. In this regard, the design of concrete cut off wall connection to the clayey core of earth dam is important. In this research, the total flow and the hydraulic gradient are considered to study the seepage through different cut off wall connection systems. The Karkheh storage dam with a plastic concrete cut off wall is selected for the seepage analysis. Six different connection systems are modeled and the effect of physical and mechanical factors like, the cut off wall permeability and the geometry of the connection systems on the total flow and the maximum hydraulic gradient are investigated. The connection systems with minimum flow and hydraulic gradient are determined. According to the results, the cut off wall connection system is an important part that affects the flow in earth dams. In this regard, the connection system with the most effective characteristics and suitability in construction is determined.