{"id":8767,"date":"2011-12-23T18:14:55","date_gmt":"2011-12-23T09:14:55","guid":{"rendered":"http:\/\/morigen.net\/blog\/?p=8767"},"modified":"2018-08-30T23:37:56","modified_gmt":"2018-08-30T14:37:56","slug":"crisis-of-the-okayama-bridge-2","status":"publish","type":"post","link":"https:\/\/morigen.net\/blog\/?p=8767&lang=en","title":{"rendered":"Crisis of the Okayama bridge"},"content":{"rendered":"

In fall of 1936, military exercises of the army ware held in Hokkaido (\u5317\u6d77\u9053), simultaneously the infrastructure of road was prepared. Okayama bridge (\u5ca1\u5c71\u6a4b, okayama bashi) was built in Iwamizawa city (\u5ca9\u898b\u6ca2\u5e02, iwamizawa shi), it’s the bridge that I watched today.Steel arch bridges (except stiffening arch)<\/SPAN> were built only 3, on pre war time in Hokkaido. Okayama bridge is one of it. It was national road No.12 in when opened, in 1969, national road change route and the bridge was a city road. It closed from 2008 by deterioration, but it wasn’t removed, it arrived at the 75 years old this year. The bridge has so history, but I heard to it will remove ultimately, so I’ll go to see the last days of the brige.<\/P>\r\n

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\"20111223141854DSC_0229.JPG\"<\/A>
\r\nNOOOOOOOO! IT’S TOO LAAAAAATE!<\/P>\r\n

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\"20111223143338DSC_0291.JPG\"<\/A>
\r\nIt was a misunderstanding. Not remove but repair. You startled me. However, the responsibility rests with not researched me<\/P>\r\n

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\"20111223142752DSC_0268.JPG\"<\/A>
\r\nThe slab was removed already, the arch is untouched.<\/P>\r\n

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\"20111223142118DSC_0232.JPG\"<\/A> \"20111223142332DSC_0247.JPG\"<\/A>
\r\nI had inside shown, the slab was removed completely, and reveal these true character of the steel bridge. It’s tied arch that tie end of arch rib. And it has rivet that I hardly see recently.<\/P>\r\n

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\"20111223142728DSC_0259.JPG\"<\/A>
\r\nRepair will end in spring of 2012, so I want to come other day.<\/P>\r\n

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2016-04-02Postscript
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\"20150503101010DSC_1166.JPG\"<\/A>
\r\nI came back after the repair.<\/P>\r\n

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\"20150503094446DSC_1125.JPG\"<\/A>
\r\nIt was opened, but it was restricted height and weight, special vehicle can’t use this.<\/P>\r\n

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\"20150503094538DSC_1126.JPG\"<\/A>
\r\nNewels was removed, the railing was rebuilt. When repairing, the slab was removed completely, so it was rebuilt too. But arch rib is untouched quite.<\/P>\r\n

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\"20150503095708DSC_1140.JPG\"<\/A>
\r\nMaterial that under road surface was repainted. Rivets are leave alone, I can’t find any bolts. It means didn’t change or add materials. It looks only remove rust and repainted. Why it was closing because no damage to the arch and here?<\/P>\r\n

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\"20150503101102DSC_1167.JPG\"<\/A>
\r\nIt’s tied arch, so shoe transmits load perpendicularly.<\/P>\r\n

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\"20150503095406DSC_1134.JPG\"<\/A>
\r\nHowever, shoe of opposite shore inclinatory, and coagulated rigidly by conclete. It not not usually admittedly. Factor of the bridge closed seems to it.<\/P>\r\n<\/DIV>\r\n

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infomation of this entry<\/H3>\r\n
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\u4e3b\u8981\u5730\u70b9\u306e\u5730\u56f3<\/H4>\r\n\t