How does a vertical lift bridge work?
Vertical lift bridges use a system of counterweights and cables to move an interior lift span section that remains horizontal as it is raised up and down like an elevator, allowing river traffic to pass beneath the structure. The Hawthorne Bridge is the most prominent example of a vertical lift bridge.
What are the bridges that lift up?
A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- or double-leafed.
What is the biggest lift bridge in the world?
Arthur Kill Vertical Lift Bridge
Arthur Kill Vertical Lift Bridge – Connecting Elizabeth, New Jersey, and Staten Island, New York; with a lift with a 559-foot (170 m) span: the longest lift span in the world.
What is a hydraulic bridge?
Hydraulically Assisted Bridges (HAB) is a new concept in bridge design which incorporates an integrated hydraulic system into the bridge in order to carry more weight. The system is most suitable for arch-based bridges in which the main forces are directed in a horizontal sideways direction.
Which is India’s longest sea bridge?
The Mumbai Trans Harbour Link, also known as the Sewri-Nhava Sheva Trans Harbour Link, is 21.8-kilometre bridge across the Thane Creek that will connect upscale South Mumbai to the satellite city of Navi Mumbai and Raigad and the upcoming new international airport in Navi Mumbai.
What are the advantages of a vertical lift bridge?
The vertical lift offers several benefits over other movable bridges such as the bascule bridge and swing-span bridge. Generally speaking they cost less to build for longer moveable spans.
What is the highest vertical lift bridge in the world?
The 516-foot (157 m) lift span replaced a swing span in 1989 and, with 200 ft (61 m) of clearance underneath when raised, it is one of the highest vertical-lift bridges in the world. Cape Cod Canal Railroad Bridge – A single-track railroad bridge over the Cape Cod Canal in Bourne, Massachusetts.
What are some examples of vertical lift bridges?
Although most vertical-lift bridges use towers, each equipped with counterweights, some use hydraulic jacks located below the deck. An example is the 52-foot (15.85 m) span bridge at St Paul Avenue in Milwaukee (see also table bridges ).
What is the difference between a vertical lift and bascule bridge?
The counterweights in a vertical lift are only required to be equal to the weight of the deck, whereas bascule bridge counterweights must weigh several times as much as the span being lifted. As a result, heavier materials can be used in the deck, and so this type of bridge is especially suited for heavy railroad use.