Date

08 May 1984, 10:15 am - 5:00 pm

Abstract

The Paper describes the performance of a 28 m high compacted earthfill dam for water supply in Northeast Brazil. For mainly economic reasons, the dam was founded, in part, over soft to very soft silty clays to a depth exceeding 8 metres. Large diameter sand drains were provided to accelerate consolidation in the foundation during construction. Maximum construction settlements of approximately 240 cm were recorded. Results of settlement of spillway structures, pore pressure measurements in the fill and long term settlements, are described in this paper. Transverse cracking of fill occurred as a result of large deformations in the compressible sediments. The cracks were repaired, and the dam is currently operating satisfactorily.

Department(s)

Civil, Architectural and Environmental Engineering

Meeting Name

1st Conference of the International Conference on Case Histories in Geotechnical Engineering

Publisher

University of Missouri--Rolla

Document Version

Final Version

Rights

© 1984 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 6th, 12:00 AM

The Santa Helena Dam on Compressible Foundation

The Paper describes the performance of a 28 m high compacted earthfill dam for water supply in Northeast Brazil. For mainly economic reasons, the dam was founded, in part, over soft to very soft silty clays to a depth exceeding 8 metres. Large diameter sand drains were provided to accelerate consolidation in the foundation during construction. Maximum construction settlements of approximately 240 cm were recorded. Results of settlement of spillway structures, pore pressure measurements in the fill and long term settlements, are described in this paper. Transverse cracking of fill occurred as a result of large deformations in the compressible sediments. The cracks were repaired, and the dam is currently operating satisfactorily.