Session Start Date

6-1-1988

Abstract

Any fault in the foundation of a dam presents a problem which has to be tackled in the proper way considering many aspects. This paper deals with such a foundation problem faced at Upper Aliyar Dam in South India in the shape of a weak zone. Several alternatives were thought of for tackling the weak zone. Ultimately a simple concrete plug with cut-offs was adopted considering the limited working season available and the fairly good in-situ compressive strength of the weak material. This was in preference to a raft foundation or a massive arch. The methods adopted for tackling the problem have been elaborated. The performance of the dam during the past more than 20 years has been quite satisfactory considering that no leakage or settlement has occurred after the treatment of weak zone. The conclusions reached at the end provide significant points in the field of geotechnical engineering.

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

Problems and Behaviour of a Dam Founded on a Weak Zone

Any fault in the foundation of a dam presents a problem which has to be tackled in the proper way considering many aspects. This paper deals with such a foundation problem faced at Upper Aliyar Dam in South India in the shape of a weak zone. Several alternatives were thought of for tackling the weak zone. Ultimately a simple concrete plug with cut-offs was adopted considering the limited working season available and the fairly good in-situ compressive strength of the weak material. This was in preference to a raft foundation or a massive arch. The methods adopted for tackling the problem have been elaborated. The performance of the dam during the past more than 20 years has been quite satisfactory considering that no leakage or settlement has occurred after the treatment of weak zone. The conclusions reached at the end provide significant points in the field of geotechnical engineering.