吊橋のケーブル架設技術 - KOBELCO 神戸製鋼

1 FEATURE : Bridge & Construction Engineering .. Erecting Technology for Suspension Bridge Cables Masayuki Akiyama Yoshihiro Kobayashi Masao Hirosawa Shinichi Mineji Dr Kenichi Sugii The technical development of catwalk designs and the erection of main cable PWS method, AS method , as well as changes in erecting technology for suspension bridge cables is described in this paper . Featured new technologies include the on-site-fabrication & direct-stretching PWS method, a method with no tenta- tive-leading & transferring process, an AS method using large diameter wires, and a new adjusting method for anchor-span tension . 1998 4 4 . 1999 5 5 . 3 6 . 1965 .. 1 .. 367m . PWS AS .. PWS . 2 .. AS .. 1 .. 3 .. 1 .. 2 . PWS. Shop-fabricated Parallel Wire Strand AS. Air Spinning .. PWS . 1 .. PWS AS .. 1m .. 1 . 2 . 4 . 3 . 2 KOBE STEEL ENGINEERING REPORTS/Vol. 49 No. 2 Sep. 1999 . 1 . Table 1 Progress in cable erection techniques for suspention bridge.

2 1974 1983 1985 1988 1988 1993 1998 1998 1999 . 712m 770m 876m 940m 1 100m 570m 720m 1 991m 1 030m 3 . PWS PWS PWS AS PWS PWS PWS PWS PWS . 5 . 04mm 5 . 17mm 5 . 37mm 5 . 37mm 5 . 12mm 5 . 37mm 5 . 20mm 5 . 23mm 5 . 00mm 3 . 91 127 127 552 127 127 127 127 127 . 154st 2 91st 2 154st 2 44st 2 271st 2 127st 2 52st 2 290st 2 102st 2 3 .. 1 160m 1 360m 1 720m 1 510m 1 780m 962m 1 620m 4 070m 1 703m 3 . 5 085t 5 166t 11 962t 13 018t 19 758t 5 554t 3 560t 50 460t 6 778t 3 . 664mm 618mm 840mm 940mm 1 070mm 762mm 472mm 1 122mm 636mm 3 . 1 . 2st 2 3st 2 .. CFRC CFRC CFRC CFRC CFRC CFRC CFRC PWS PWS.. S S .. /Vol. 49 No. 2 Sep. 1999 .. 1 cw 1 cw 1 cw 2 cw 1 cw 1 cw 1 cw 2 cw 1 cw .. t 106 138 155 124 247 113 71 510 254 3 . 100t 6 100t 6 200t 6 300t 6 300t 6 200t 6 200t 6 300t 6 200t 6 .. 2 .. 1 . 2 . 3. Catwalk Rope Hanger Rope (Diagonal).. 5 .. Storm Rope Traction Rope a) Kanmon Bridge type catwalk system with diagonal hanger ropes and traction ropes.

3 B) Innoshima Bridge type catwalk system with vertical hanger ropes .. 1 a . 4 .. c) Akashi Kaikyo Bridge type catwalk system without storm ropes 1 . Fig. 1 Framework of catwalk 5 . 1 b .. 2 000m . 7 . 8 .. 9 . 10 11 .. 1 c .. 6 .. 12 .. CPU .. 600m .. 1 000m .. EasyFrame .. 1 Newton-Raphson Skyline .. 13 . 2 . 4 KOBE STEEL ENGINEERING REPORTS/Vol. 49 No. 2 Sep. 1999 .. 3 .. 4 700kN . 1 .. EasyFrame .. 3 . AS. PWS PWS . PWS .. 16 . 5mm . 91 .. 127 . 127 .. 127 AS . 1 360m 30 7 AS 2 .. 14 .. 4 070m . 1 780m 2 . AS .. 4 000m . PWS . 15 .. AS . AS . 500. Live Wire Spinning Wheel Dead Wire ;;;;; Installed Wires ;;;;;. ;;;;;. ;;;;;. ;;;;;. Strand-shoe 2 AS . Fig. 2 Principle of AS - method /Vol. 49 No. 2 Sep. 1999 5. Carryer Hauling System Continuous Wire PWS Tower Forming Forming Puller Tape Wire Supply Roller Screen Roller Binding Catwalk Anchorage 3 . Fig. 3 Site-fabricated PWS method . N/ .. Dead . wire Live wire .. DINA .. AS PWS . 10m/s.

4 17 . 700kN . Birdsall . 18 .. AS .. PWS .. 19 .. 4 . Strand Vertical Roller . Roller Support Stand Horizontal Roller PWS . Erected Strand PWS 90 . 4 . 7m . a) Carrying the Strand .. Opened Horizontal Roller .. PWS . Catwalk 3 b) Setting (Dropping) the Strand 20 . 21 . 4 PWS . Fig. 4 PWS dropping method 6 KOBE STEEL ENGINEERING REPORTS/Vol. 49 No. 2 Sep. 1999 . 4 PWS 34 .. PWS .. 1 . PWS . 2 . 3 .. 4 . AS . AS PWS . 2 4 .. 1 1998 2 1994 . 3 1996 5mm 2 7mm . 4 R&D 1973 1 5 R&D 1982 7mm 6 1995 7 212 1973 8 238 1975 . 9 30 I-202. 1975 10 31 I-78. PWS 1976 11 R&D 1973 . 12 . 18 1994 13 335 1983 14 I. Konishi Annals of The New York Academy of Siences . 1980 . 15 R&D 1988 16 R&D 1988 17 R&D 1988 18 B. Birdsall : San Francisco Section A. S. C. E Bridge Engi- neering 1987 . 22 . 19 1997 20 VI-16 1992 21 ' 96 . 1996 22 1998 .. /Vol. 49 No. 2 Sep. 1999 7.