Session Start Date

6-1-1988

Abstract

Several failures of floodbanks caused by increases in water pressure and seepage in foundation soils during abnormal high floodwater conditions have been investigated. The particular type of failure which occurred depended upon the sequences of the foundation strata, the overall bank profile, and the height and duration of the floodwater. Both rotational and translational slides occurred in banks built on sands, peats and clays with underlaying sandy gravels. Breaches occurred when the cress was sufficiently lowered to allow substantial overtopping or where gaps developed at the ends of the translational slides. Development of erosion pipes in multi-layered soils led to both partial collapse and breaching of banks. The need to anticipate possible failure mechanisms when evaluating the effectiveness of flood defenses is emphasized.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1988

Document Version

Final Version

Rights

© 1988 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Failure of Flood Banks Due to Under Seepage

Several failures of floodbanks caused by increases in water pressure and seepage in foundation soils during abnormal high floodwater conditions have been investigated. The particular type of failure which occurred depended upon the sequences of the foundation strata, the overall bank profile, and the height and duration of the floodwater. Both rotational and translational slides occurred in banks built on sands, peats and clays with underlaying sandy gravels. Breaches occurred when the cress was sufficiently lowered to allow substantial overtopping or where gaps developed at the ends of the translational slides. Development of erosion pipes in multi-layered soils led to both partial collapse and breaching of banks. The need to anticipate possible failure mechanisms when evaluating the effectiveness of flood defenses is emphasized.