Breaclaich Dam - upstream face joint bandage sealant and wavewall refurbishment works

摘要

Breaclaich is a 26 m high, 434 m long concrete faced rockfill dam. Areas of the concrete panel joints were progressively deteriorating and leakage monitoring confirmed a clear upward trend with leakage on occasions exceeding the previously determined maximums established under the Reservoirs Act. The wave wall was noted in the original form of record as being of indifferent appearance and alignment, both of which had continued to deteriorate with time to an unacceptable level. Recent design calculations demonstrated that the wavewall would be unstable under design wave surcharge conditions.