Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

The upstream cofferdam of Xiluodu hydraulic power station project, with height of 72 meters, is designed as the main body of the project. It is characterized by its high retaining water head, short construction period and complex geological conditions. Presented in this paper is a three-dimensional FEM analysis used to investigate the seepage behavior of the upstream cofferdam for two different design schemes. In the analysis, the cracks in cut-off wall which may be caused in construction are also properly considered. Based on 3D seepage model of saturated-unsaturated flow for non-uniform soils, a fixed-mesh FEM is used in the seepage analysis of the upstream cofferdam. As the results of the analysis, the distribution of water head and discharge of seepage are obtained and compared. The seepage stability of the cofferdam is analyzed to be safe enough based on the new concept called critical gradient zone.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 13th, 12:00 AM Apr 17th, 12:00 AM

A FEM Seepage Analysis for Upstream Cofferdam of Xiluodu Hydraulic Power Station

New York, New York

The upstream cofferdam of Xiluodu hydraulic power station project, with height of 72 meters, is designed as the main body of the project. It is characterized by its high retaining water head, short construction period and complex geological conditions. Presented in this paper is a three-dimensional FEM analysis used to investigate the seepage behavior of the upstream cofferdam for two different design schemes. In the analysis, the cracks in cut-off wall which may be caused in construction are also properly considered. Based on 3D seepage model of saturated-unsaturated flow for non-uniform soils, a fixed-mesh FEM is used in the seepage analysis of the upstream cofferdam. As the results of the analysis, the distribution of water head and discharge of seepage are obtained and compared. The seepage stability of the cofferdam is analyzed to be safe enough based on the new concept called critical gradient zone.