Hoover Dam

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An extra-ordinary Engineering Marvel in Construction Technology,

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Hoover Dam

  1. 1. New Hoover Dam Bridge Between Nevada and Arizona
  2. 2. Hoover DamPicture Title Click
  3. 3. Nevada Hoover DamCalifornia Click Picture Title Click
  4. 4. Hoover Dam Hoover Dam Bridge ClickPicture Title
  5. 5. Nevada State line ArizonaTime zone line Hoover Dam Hoover Dam Bridge Picture Title Click
  6. 6. New method to builda reinforced concrete bridge without the conventional temporary shoring
  7. 7. The suspension cables for temporary support
  8. 8. suspension cable
  9. 9. High line cable conveyor Reusable metalsliding formwork
  10. 10. Suspension cables temporary support System
  11. 11. The concrete Arch designed for carrying the temporary and permanent load
  12. 12. Conventional scaffold system, too expensive ! !
  13. 13. Steel strut Reinforced concrete twin Arch connected by steel struts
  14. 14. Steel Box Girders andconcrete roadway deck
  15. 15. Colorado River
  16. 16. Lower twin arch was completed
  17. 17. Cut off the suspensioncables, when concrete up to it’s strength
  18. 18. Reusable metalsliding formwork for reinforcedconcrete columns
  19. 19. The upper deck columns, buildon the top of thelower twin arch
  20. 20. Steel Box Girders
  21. 21. Pre-stressed concrete and steel box composite Girders
  22. 22. Hoover Dam Bridge over Colorado River
  23. 23. Hoover Dam Bypass Bridge Opened Oct. 19, 2010
  24. 24. The center line of Colorado River and Hoover Dam Bridge wasState Line of Nevada and Arizona, and also a Time Zonedivided line of Pacific and Mountain Time, If drive from west tothe east, when you pass the bridge, you will enter Arizona andgain one extra hour. Click
  25. 25. Name of the Bridge• In the beginning called : Hoover Dam Bypass Bridge now the official name was :• Mike O’Callaghan – Tillman Killey Memorial Bridge Mike OCallaghan – Joined the Marines at sixteen, 1952 he lost part of his left leg in the battle of Korean War, 1971 to 1979 was Governor of Nevada, later he was the Executive Editor at the Las Vegas Sun newspaper, he died on March 5, 2004.• Tillman Killey – Arizona famous NFL football player, he gave up his well paid job and joined the army, he died by a friendly fire in Afghanistan on April 22, 2004. Click
  26. 26. Hoover Dam Bridge technical information Designer : T. Y. Lin International ( 林同棪 ) 1988 finished the investigation and environmental report. The design work start in July 2001 & finish two years later.• Bridge length : 1900 ft ( 580 m ).• Arch span : 1060 ft ( 320 m ).• Bridge width : Four lane highway.• Bridge height : 840 ft ( 263 m ) , 2 nd height of U.S.• Bridge away from Hoover Dam : 1600 ft ( 550 m).• Construction began on Feb. 2005 and completion on Oct.2010.• Construction cost : 114 million.• This is the first Concrete-and-steel composite arch bridge built in United State.• Pedestrian access is provided over the bridge for tourists. Click
  27. 27. Hoover Dam technical information• Hoover Dam was built after 1930 Great Depression, it was a project to increased job for American worker.• Type : Concrete gravity - arch dam• Top width : 45 ft ( 14 m), Base width : 660 ft ( 200 m)• Dam height : 726 ft ( 230 m), and 1245 ft (380 m) long• Construction begin at 1931 and finish at 1936• Total cost : 49 million• Reservoir : 28,537,000 Acre ft (35,200 Kilo cubic meter)• Power annual generation : 4.2 Billion kwh• Worker : Hired 5500 construction workers, Chinese labor was forbidden by construction contract.• Hoover Dam was a tour spot, every year more than million of peoples visit there. Click
  28. 28. 林同棪小傳 (T. Y. Lin) : Nov. 14, 1912 – Nov. 15, 2003• 林同棪福建省福州人 ,1931 畢業於交通大學分校 , 唐山工 學院土木系 , 1933 獲得美國加州大學 University of California, Berkeley 土木碩士學位 .• 回國後任成榆鉄路 , 橋樑組總工程師 , 後任職於台糖鉄路處 處長 .• 1946 回 UC Berkeley 土木系任教授 , 1976 年退休 .• 1954 在美創立 T.Y. Lin International, 工程顧問公司 . 主 要承接預應力橋樑和大跨度建築等結構計算及設計為主 .• 林同棪對預應力工程 (Pre-stressed and Post- tensioning Concrete) 有精深的研究 , 他把理論應用到 實際的工程上 , 是世界知名的工程專家 , 因而有 ”預應力之 父” 之稱 .• 在 1970 年代 , 先後在台湾 , 香港和中國大陸都設立分公 司.• 1972 被選為中央研究院 , 院士 .• 1986 獲得美國雷根總統之 National medal of Science. Click

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