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Temperature Effect on Tieback Loads
More than 50 tiebacks were installed into a structural concrete slurry wall supporting a deep excavation. The tiebacks consisted of 7-wire strands and ranged in length from about 50–80 ft (15.2–24.4 m). Three of the tiebacks were fitted with load cells and were monitored for a period of 14 months. Results indicate that the tieback loads fluctuated over this period by as high as about 10 percent from the initial lock off load. The variation in load is attributed to large fluctuations in temperature, ranging from about 25–100 deg F (–4 to 38 deg C) over the monitoring period. A maximum load loss of about 1 kip (4.5 kN) for every 10 deg F (5.6 deg C) rise in temperature was recorded. This can be significant for excavations with restricted movement requirement.
Temperature Effect on Tieback Loads
More than 50 tiebacks were installed into a structural concrete slurry wall supporting a deep excavation. The tiebacks consisted of 7-wire strands and ranged in length from about 50–80 ft (15.2–24.4 m). Three of the tiebacks were fitted with load cells and were monitored for a period of 14 months. Results indicate that the tieback loads fluctuated over this period by as high as about 10 percent from the initial lock off load. The variation in load is attributed to large fluctuations in temperature, ranging from about 25–100 deg F (–4 to 38 deg C) over the monitoring period. A maximum load loss of about 1 kip (4.5 kN) for every 10 deg F (5.6 deg C) rise in temperature was recorded. This can be significant for excavations with restricted movement requirement.
Temperature Effect on Tieback Loads
Massoudi, Nasser (author)
International Foundation Congress and Equipment Expo 2009 ; 2009 ; Orlando, Florida, United States
2009-03-10
Conference paper
Electronic Resource
English
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