Architecture firm Foster + Partners has developed a proposal for repairing London’s Hammersmith Bridge while reopening it by inserting a separate double-decker road raised over the original structure.
An extra deck would allow vehicle traffic to drive over the top of a pedestrian and cycle path, freeing up space for workmen to carry out essential repairs.
The temporary crossing, which wouldn’t rest on the bridge, could be built in two parts and inserted across the bridge from both sides to meet in the middle.
Supported by truss structures on both sides, it would allow the bridge, which is currently closed, to reopen to pedestrians and vehicles while repairs are made.
Using the decks as a platform, workers could remove sections of the Grade II*-listed bridge and ferry them away on barges for specialist repairs.
建築公司Foster + Partners已經提出了一項修復倫敦哈默史密斯橋的提案，同時通過在原始結構上架設一條單獨的雙層道路來重新開放它。
額外的甲板將使車輛行駛在行人和自行車道的頂部，從而為工人騰出空間進行必要的維修。
臨時過境點不會停留在橋上，可以分為兩部分，從兩側插入跨過橋，在中間相遇。
由兩側的桁架結構支撐，這將使目前關閉的橋樑在維修時可以重新開放給行人和車輛。
使用甲板作為平台，工人可以拆除II級*等級橋樑的部分，然後將它們運送到駁船上進行專業維修。
Foster + Partners has presented the proposal to Hammersmith and Fulham Council, which has been struggling to raise funds needed to repair the 133-year-old bridge.
“We believe that our concept resolves the two challenges for Hammersmith Bridge economically and efficiently,” said Foster + Partners head of structural engineering Roger Ridsdill Smith.
“Delivering a temporary crossing quickly, whilst providing a safe support to access and refurbish the existing bridge.”
Hammersmith Bridge over the Thames has been closed since 13 August 2020 as it was deemed unsafe. Sensors placed on the bridge revealed that microfractures were developing in the bridge’s cast iron pedestals.
Foster + Partners已向漢默史密斯和富勒姆市政廳提交了該提議，後者一直在努力籌集修復這座已有133年曆史的橋樑所需的資金。
Foster + Partners結構工程負責人Roger Ridsdill Smith表示：“我們相信，我們的概念可以經濟高效地解決Hammersmith Bridge面臨的兩個挑戰。”
“迅速提供臨時通道，同時為進入和翻新現有橋樑提供安全支持。”
自2020年8月13日起，泰晤士河上的哈默史密斯大橋因不安全而關閉。 放置在橋上的傳感器顯示，橋的鑄鐵基座中正在出現微裂紋。
Due to decades of unchecked corrosion, the bridge could shatter and plunge traffic into the river at any moment.
Hammersmith and Fulham Council estimated the cost to repair the bridge, which first opened in 1887, would be £46 million just to stabilise it, and £141 million to restore it to a state where it could open to motor traffic again.
Foster + Partner’s proposal could prove more cost-effective, allowing the bridge to reopen to the 22,000 vehicles who used it to cross the river in the UK’s capital every day.
由於數十年來不受控制的腐蝕，這座橋隨時可能破碎，並使交通陷入河流。
哈默史密斯和富勒姆市政廳估計，這座橋於1887年首次啟用，維修費用僅為4,600萬英鎊，僅用於穩定其費用，而將其修復為1.41億英鎊，使其可以再次通車。
Foster + Partner的提議可能會更具成本效益，允許這座橋重新開放給每天使用該橋穿越英國首都河的22,000輛汽車。
The lower deck would give workers a safe way to access the original bridge’s pedestals, anchors and chains. Removing and repairing elements off-site would be easier, and also cut down on noise and disruption.
“We consider that this approach is practical and viable,” said COWI executive director David MacKenzie, the engineering firm partnering with Foster + Partners on the project.
“Our experience is that offsite refurbishment of bridge structures is safer and more controlled, and results in a higher quality final outcome when the structure is re-installed.”
Hammersmith Bridge was designed by 19th-century civil engineer Joseph Bazalgette, and was the first iron suspension bridge to span the Thames. The landmark structure is painted green and gold, with monumental towers sporting heraldic crests.
Foster + Partners was founded in 1967 by Norman Foster, three years before Hammersmith Bridge was given its Grade II*-listed status.
The practice recently won the competition to design a pair of bridges in Suffolk, one for vehicles and the other for cyclists and pedestrians.
較低的甲板將為工人提供一種安全的方式來訪問原始橋樑的基座，錨和鏈條。異地拆卸和維修元件將更加容易，並且還可以減少噪音和乾擾。
與Foster + Partners合作進行該項目的工程公司COWI執行董事David MacKenzie說：“我們認為這種方法是切實可行的。”
“我們的經驗是，橋樑結構的異地翻新更安全，更可控，並且在重新安裝結構時可產生更高質量的最終結果。”
Hammersmith橋由19世紀的土木工程師Joseph Bazalgette設計，是第一座橫跨泰晤士河的鐵懸索橋。地標性建築被漆成綠色和金色，巨大的塔樓帶有紋章徽記。
Foster + Partners由諾曼·福斯特（Norman Foster）於1967年創立，距漢默史密斯橋（Hammersmith Bridge）獲二級*認證的地位還不到三年。
這種做法最近贏得了比賽，在薩福克郡設計了一對橋樑，一個用於車輛，另一個用於騎自行車的人和行人。
