Investigation and Rehabilitation of Chardara Dam Spillway
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Published:2006
J H Meldrum, 2006. "Investigation and Rehabilitation of Chardara Dam Spillway", Improvements in reservoir construction, operation and maintenance: Proceedings of the 14th Conference of the British Dam Society at the University of Durham from 6 to 9 September 2006, Henry Hewlett
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Synopsis
A reported vibration problem with 40 year old spillway outlet gates turned out to be a hydraulically poorly designed structure with cavitation and hydraulic impact problems requiring alterations to the structure as well as replacement of the gates. Vibration surveys, hydraulic model testing and diving surveys were all employed successfully to investigate the cause of the problem and to assist with the design of the remedial works. Dewatering of the structure was required to carry out the remedial works and as there were no provisions to do so in the existing structure a caisson gate was designed that could be floated into the site and then positioned by flooding watertight compartments.
Introduction
Description of the Spillway Outlets
The Problems
Design
Investigations
Caisson Gate
Conclusions
