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Avoncliff Aqueduct () carries the Kennet and Avon Canal over the River Avon and the Bath to Westbury railway line, at Avoncliff in Wiltshire, England. It was built by John Rennie and chief engineer John Thomas, between 1797 and 1801. It is a Grade II * listed building. During construction stone from a local quarry was used which broke when affected by frost. This caused buttresses to collapse and parts of the structure to need rebuilding. Eventually Bath stone from Bathampton Down was used enabling greater stability. The aqueduct consists of three arches and is long with a central elliptical arch of 60 ft (18.3 m) span with two side arches each semicircular and 34 ft (10.4 m) across, all with V-jointed arch stones. The spandrel and wing walls are built in alternate courses of ashlar masonry and rock-faced blocks.〔(【引用サイトリンク】 work=Avoncliff )〕 The central span sagged soon after it was built and has been repaired many times. As part of the restoration of the canal the aqueduct was lined with a concrete "cradle" and made water-tight in 1980.〔(【引用サイトリンク】url=http://www.avoncliff.co.uk/history/canal.htm )〕 ==Gallery== Image:Avoncliff.JPG|Crossing the Avoncliff Aqueduct File:Avoncliff Aqueduct.JPG|View from Avoncliff railway station File:avoncliff aqueduct in wiltshire england arp.jpg|The aqueduct seen from the Bradford on Avon side. The River Avon passes beneath. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Avoncliff Aqueduct」の詳細全文を読む スポンサード リンク
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