A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Repair of ASR-Damaged Piles
About 4.5 miles north of Cairns, Queensland, Australia, the southbound carriageway of the Captain Cook Highway passes over the tidal estuary of the Barron River. Constructed in 1977, the bridge over the estuary is 579 ft long and 34 ft wide, with seven spans of 77 ft. The superstructure consists of prestressed concrete (PC) beams and reinforced concrete (RC) deck, while the substructure consists of piled abutments and blade piers rising from pile caps, each supported on 10 closely spaced PC piles. The octagonal piles have minimum diameters of just under 21 in., and the clear spacing is as low as 12 in. The upper 4 ft of the piles are within the tidal range. However, the piles are generally underwater, and it is rare for more than 20 in. of a pile to be exposed. In retrospect, the agency's decision to delay the project was fortuitous, as the development of the new laminate technology resulted in significant cost savings.
Repair of ASR-Damaged Piles
About 4.5 miles north of Cairns, Queensland, Australia, the southbound carriageway of the Captain Cook Highway passes over the tidal estuary of the Barron River. Constructed in 1977, the bridge over the estuary is 579 ft long and 34 ft wide, with seven spans of 77 ft. The superstructure consists of prestressed concrete (PC) beams and reinforced concrete (RC) deck, while the substructure consists of piled abutments and blade piers rising from pile caps, each supported on 10 closely spaced PC piles. The octagonal piles have minimum diameters of just under 21 in., and the clear spacing is as low as 12 in. The upper 4 ft of the piles are within the tidal range. However, the piles are generally underwater, and it is rare for more than 20 in. of a pile to be exposed. In retrospect, the agency's decision to delay the project was fortuitous, as the development of the new laminate technology resulted in significant cost savings.
Repair of ASR-Damaged Piles
Mo Ehsani (author) / Stephen Day / Tony White
2017
Article (Journal)
English
Damaged piles found safe -- Points prevent damage
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