Multiple arch dam: Challenges with the rehabilitation of one of the thin, unreinforced, double curvature arches of the Stompdrift Dam

Author(s): J.L. Schoeman, C. Oosthuizen
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 231 - 232
Total Pages: 2
Language: English

Abstract: 
Stompdrift Dam is a multiple (three) double-curvature arch dam supported by two buttresses in the centre and a curved gravity section on the right flank. The dam has to be rehabilitated because of its insufficient spillway capacity and unfavourable cracks that have developed at its third arch. Four alternatives were investigated for strengthening the third arch. The existing thin arch could be converted into a double-curvature thick arch, a multiple buttressed arch, a gravity arch or a cylindrical thick arch. Various challenges encountered with the selected alternative are discussed, i.e. the seasonal movement of the existing structure, bonding of the joint between existing and new concrete, the effect of heat of hydration of the cementitious materials and to retain the unique view of the dam.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00