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KAWASAKI STEEL GIHO
Vol.13 (1981) No.3
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_ŒËŽs…“¹‹Ç¼‚…’²®ƒ^ƒ“ƒNHŽ–‚É‚¨‚¯‚é’ê”ŃRƒ“ƒNƒŠ[ƒg‚ÌŽ{H‚ɂ‚¢‚Ä
Execution of Foundation Slab Concrete under Nishitarumi Water Tank in Kobe City

–Øì @i(Susumu Kigawa)@‹ß“¡@LŽ¡(Shinji Kondo)@”öŒ´@Kl(Yukito Obara)
—vŽ| :
_ŒËŽs…“¹‹Ç‚łͼ‚…”z…ê“à‚É—e—Ê20000kl‚̉~“›Œ^|»ƒ^ƒ“ƒN‚ÌŒšÝ‚ðŒv‰æ‚µCŠî‘b‚®‚¢‚𜂭’ê”ŃRƒ“ƒNƒŠ[ƒg‚ƃ^ƒ“ƒN–{‘Ì‚¨‚æ‚Ñ‚»‚Ì•t‘ÑHŽ–‚𓖎Ђª’S“–‚µ‚½B–{•ñ‚Í‚±‚ê‚ç‚Ì‚¤‚¿ƒ^ƒ“ƒN’ê”Å‚ÌŽ{H‚ÉŠÖ‚·‚é‚à‚Ì‚Å‚ ‚éB’ê”ŃRƒ“ƒNƒŠ[ƒg‚Í’¼Œa46m, Œú‚³0.7`1.0m‚Ń}ƒXƒRƒ“ƒNƒŠ[ƒg‚͈̔͂ɑ®‚µC‚µ‚©‚à‘ÅÝŽžŠú‚ªH’öãC‰ÄŠú‚Æ‚È‚Á‚½‚½‚߃Rƒ“ƒNƒŠ[ƒg‚Ì…˜a”M‚É‚æ‚鉷“x‚̂Ђтí‚êC’·Šú‹­“x‚̒ቺ“™‚ðŽ–‘O‚ÉŒŸ“¢‚µ‚È‚¯‚ê‚΂Ȃç‚È‚©‚Á‚½B‚Ü‚½C‚±‚̼‚…”z…ê‚ÌŽü•Ó‚ÍZ‘î’nˆæ‚ÅC‚©‚ÂŒšÝ—p’n‚ª‹·‚¢“™‚ÌðŒ‚à‚ ‚è–ñ1500m**3‚̃Rƒ“ƒNƒŠ[ƒg‚ð‘ÅÝ‚·‚é‚ɂ͊‹«ãŒµ‚µ‚¢§–ñ‚ª‚ ‚Á‚½B–{HŽ–‚Å‚Í‚±‚ê‚ç‚ÌÝŒvEŽ{Hã‚Ì–â‘è‚ɑ΂µ‚Ä‚˜FƒZƒƒ“ƒgBŽí‚âÅ‘å¡–@40mm‚Ì‘eœÞ‚ÌÌ—pC’ê”ŃRƒ“ƒNƒŠ[ƒg‚̉”’¼•ªŠ„‘ÅÝ“™‚Ì‘Îô‚ðu‚¶‚ÄŽ{H‚µ‚½Œ‹‰ÊC‚Ђтí‚ê”­¶‚Ì­‚È‚¢—ÇD‚ȃ^ƒ“ƒN’ê”Å‚ðŒšÝ‚·‚邱‚Æ‚ª‚Å‚«‚½B
Synopsis :
The Kobe City Government planned to construct a steel water tank at Nshitarumi Service Distributing Reservoir in Kobe City, which would be able to store 20000kl of water, Kawasaki Steel's Engineering Division took part in this project as a prime contractor and executed placing of foundation slab concrete and fabrication of the steel tack. This paper describs the construction of this concrete slab of 46 m in diameter and 0.7`1.0 m in thickness. Since this construction work was performed in midsummer, consideration had to be given to the posible strength reduction of hardened concrete at a later period due to hot weather concreting, and thermal cracking caused by the chemical reaction between cement and water in mass concrete. On the other hand, the constrtuction site was in the middle of a residential area and the space for execution of construction work was cramped. Therefore, Portland blast-furnace slag cement and aggregates of max. 40 mm in size were used and the foundation slab was constructed by dividing it into five blanks with vertical joint surfaces, in order to cope with those adverse conditions. As a result, it was possible to construct a satisfactory concrete foundation slab with few crecks.
–{•¶i PDF: 12P/367kb j




(c)JFE Steel Corporation, 2003