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A platform for research: civil engineering, architecture and urbanism
High-Capacity, Multi-Purpose Rock Anchors for Dam Rehabilitation
Santeetlah Dam consists of a gravity and arch structure approximately 1,000 ft long and 200 ft high. Figure 1 shows a plan view of Santeetlah Dam. The arch/gravity dam has experienced movement in the upstream and vertical directions since construction of the dam in 1927. These movements are primarily attributed to concrete growth caused by alkali-aggregate reactivity (AAR). Increased seepage along the lift joints has accompanied the movements, particularly in the left wing wall section. In order to relieve the concrete stress in the left wing wall section, an existing expansion slot will be recut and deepened at the previous location in early 1999. In preparation for the slot cut, both vertical and inclined high capacity, epoxy coated and filled, post-tensioned rock anchors were installed in the left wing wall section. A total of six 1,500 kip design capacity, vertical anchors were installed in the structural block containing the proposed expansion slot to improve sliding resistance of the horizontal concrete lift joints during slot cutting. Two 58-strand, 2,000 kip design capacity, inclined anchors were installed in the downstream face to improve resistance to foundation sliding. These are believed to be the largest inclined epoxy coated anchors installed to date in North America.
High-Capacity, Multi-Purpose Rock Anchors for Dam Rehabilitation
Santeetlah Dam consists of a gravity and arch structure approximately 1,000 ft long and 200 ft high. Figure 1 shows a plan view of Santeetlah Dam. The arch/gravity dam has experienced movement in the upstream and vertical directions since construction of the dam in 1927. These movements are primarily attributed to concrete growth caused by alkali-aggregate reactivity (AAR). Increased seepage along the lift joints has accompanied the movements, particularly in the left wing wall section. In order to relieve the concrete stress in the left wing wall section, an existing expansion slot will be recut and deepened at the previous location in early 1999. In preparation for the slot cut, both vertical and inclined high capacity, epoxy coated and filled, post-tensioned rock anchors were installed in the left wing wall section. A total of six 1,500 kip design capacity, vertical anchors were installed in the structural block containing the proposed expansion slot to improve sliding resistance of the horizontal concrete lift joints during slot cutting. Two 58-strand, 2,000 kip design capacity, inclined anchors were installed in the downstream face to improve resistance to foundation sliding. These are believed to be the largest inclined epoxy coated anchors installed to date in North America.
High-Capacity, Multi-Purpose Rock Anchors for Dam Rehabilitation
Mochrie, Bryce N. (author) / DeConto, Richard T. (author) / Oxendine, Bob E. (author) / West, Terry W. (author)
Waterpower Conference 1999 ; 1999 ; Las Vegas, Nevada, United States
Waterpower '99 ; 1-10
1999-07-05
Conference paper
Electronic Resource
English
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