Location

St. Louis, Missouri

Session Start Date

5-6-1984

Session End Date

5-11-1984

Abstract

Dewatering of scour pools at the toe of existing spillways can significantly increase forces on such structures and reduce their overall stability below acceptable levels. Such dewatering may be required however to undertake needed repairs or to construct a stilling basin. Use of a braced cofferdam permits the necessary dewatering while at the same time temporarily improving the stability of the spillway. This is accomplished by mobilizing earth pressures and tailwater pressures through the braces to restrain the spillway against sliding.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

First Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-6-1984

Document Version

Final Version

Rights

© 1984 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Braced Cofferdam to Improve Spillway Stability During Rehabilitation

St. Louis, Missouri

Dewatering of scour pools at the toe of existing spillways can significantly increase forces on such structures and reduce their overall stability below acceptable levels. Such dewatering may be required however to undertake needed repairs or to construct a stilling basin. Use of a braced cofferdam permits the necessary dewatering while at the same time temporarily improving the stability of the spillway. This is accomplished by mobilizing earth pressures and tailwater pressures through the braces to restrain the spillway against sliding.