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A Special Bridge or Subway Committee was formed in 1877, chaired by Sir Albert Joseph Altman, to find a solution to the river crossing problem. It opened the design of the crossing to public competition. Over 50 designs were submitted, including one from civil engineer Sir Joseph Bazalgette. The evaluation of the designs was surrounded by controversy, and it was not until 1884
塔桥（内置1886–1894）是伦敦的一个组合式 结构，悬索桥，英格兰横跨泰晤士河。它靠近 伦敦塔而得名，并已成为伦敦的一个标志性的
符号。
History
In the second half of the 19th century, increased commercial development in the East End of London led to a requirement for a new river crossing downstream of London Bridge. A traditional fixed bridge could not be built because it would cut off access by tall-masted ships to the port
琼斯的设计是一座244米长的开启桥，桥有 两个桥塔，每个塔高65米。桥的中部长61 米，分为上下2层。上层高而窄，可作为人 行道。下层是主通道，分为两扇桥段，每 扇可以竖起到83度来让河流交通通过。这 两扇桥段各重上千吨，它们的轴位于它们 的重心上来减小它们起升时所需要的力， 它们可以在一分钟内升起。一开始这个升 降装置是液压的，为此它有六个水库来产 生高压水。蒸汽机把水从水库泵入液压装
Two massive piers, containing over 70,000 tons of concrete, were sunk into the riverbed to support the construction. Over 11,000 tons of steel provided the framework for the towers and walkways. This was then clad in Cornish granite and 和Pu两no桥座drt身el坚ar共ln固ydi用n的sg了桥tos1n墩t.ee1e共,万lwb使吨oo用t钢rhk了铁tao7n。0pd,桥r0ot0o塔t0e吨gc和itv水桥teh泥身eth，的e桥钢塔铁 b骨ri架dg外e铺a设pl花ea岗s岩ing和a波p特pe兰a石ra来nc保e 护骨架和增
1876年一个特别委员会成立来讨论这个过 河问题的解决方案。它开始了一个方案设 计竞赛，一共收到了50个不同的方案。但 此后的讨论却拖延了许多时间和导致了很 多激烈的辩论，最后这个委员会于1884年 决定采用霍拉斯·琼斯的方案。霍拉斯·琼斯 本人也是评审委员会的一员
Jones' engineer, Sir John Wolfe Barry, devised the idea of a bascule bridge with two bridge towers built on piers. The central span was split into two equal bascules or leaves, which could be raised to allow river traffic to pass. The two sidespans were suspension bridges, with the suspension rods anchored both at the abutments and through rods contained within the bridge's upper walkways
Construction
Construction started in 1887 and took eight years with five major contractors and employed 432 constructionwas the resident engineer for the c1o8n8s6t年ru伦cti敦on塔. 桥开建，建造共历时8年，5 个主要建筑公司和共432建筑工人参与工程
Tower Bridge
Tower Bridge (built 1886–1894) is a combined bascule and suspension bridge in London, England which crosses the River Thames. It is close to the Tower of London, from which it takes its name, and has become an iconic symbol of London.