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Bridges and Tunnels
A bridge is a link between two places, such as over a river, a road or a depression, that caters to pedestrians and/or vehicles. A tunnel is an underground link between two places, often underneath a riverbed, for pedestrians and/or vehicles.
4,393 Questions
What are the advantages and disadvantages of a clapper bridge?
Depends upon situation and your point of view. For my money advantages of a clapper bridge:
1. More durable than a timber bridge
2. Better looking than a concrete one
3. Easier to maintain than a brick one (eg no mortar to need repointing)
4. Express local tradition, heritage ad skill than any other type of bridge
5. More fun to cross with the kids
What direction do you pay the toll for the verrazano bridge?
There are a few ways to pay the toll at the Verrazano-Narrows bridge. You can use the EZ-Pass, which is a prepaid pass to get through toll roads. The amount charged is automatically deducted from your account. You can also pay at the toll both in the cash lane, or you can send in a deferred payment by mail.
What holds up a suspension bridge?
On a suspension bridge, the ourter ends of the cables are attached to an ancorage, which has extreme mass and strength to maintain cable tension. On a truss bridge, the ends are called abutments. Both structures are built at or about the approach or approach embankments to the bridge, and we use different terms because of the difference in the loads they have to handle. Use the link below to a bit of bridge terminology. It isn't all there, but it's a good start.
What features of an Arch bridge is strong?
Bridges typically have three characteristics and are built into three different types. These include truss bridges, beam bridges, and suspension bridges.
What matereals is the humber bridge made out of?
Mainly re-enforced concrete (concrete that's been set around steel rods). The cables are made from many long strands of steel.
Where does the Chunnel begin in England?
The channel tunnel begins in Kent in England, and ends in Pas-de-calais in France.
What is the significance of the bridge in 'A view from the bridge'?
the bridge shows the crossing of two different cultures
How does a beam bridge support a load?
Beam bridges are the most simple of structural forms being supported by an abutment at each end of the bridge deck. No moments are transferred throughout the support hence their structural type is known as simply supported.
The simplest beam bridge could be a slab of stone, or a plank of wood laid across a stream. Bridges designed for modern infrastructure will usually be constructed of steel or reinforced concrete, or a combination of both. The concrete used can either be reinforced, prestressed or post-tensioned.
Types of construction could include having many beams side by side with a deck across the top of them, to a main beam either side supporting a deck between them. The main beams could be I-beams, trusses, or box girders. They could be half-through, or braced across the top to create athrough bridge.
A footbridge using beams over a stream in Dordogne, France
Because no moments are transferred, thrust, as from an arch bridge, cannot be accommodated, so leading to innovative designs, such as lenticular trusses & bow string arches, which contain the horizontalforces within the superstructure.
Beam bridges are not limited to a single span. Some viaducts such as the Feiyunjiang Bridge in Chinahave multiple simply supported spans supported by piers. This is opposed to viaducts using continuous spans over the piers.
Beam bridges are often only used for relatively short distances because, unlike truss bridges, they have no built in supports. The only supports are provided by piers.
What was the Bering land bridge?
It was a stretch of glacier ice that connected russia with Alaska (Asia with North America) across the Bering strait. It formed during an ice age that let native peoples 20,000 years ago to settle into Canada and America, and further south, all the way to present-day Argentina and Chile. These are what we know as native Americans. They formed separate tribes over time. Today, we are still trying to mimic the effects of the ice age by building a real bridge. This gap is over 50 miles of icy, cold terrain. Thick air and temperatures would prevent people from seeing or breathing. Hypothermia would set in.
What are some famous bridges in the United States?
There are many famous bridges in the world, some known for their beauty, some for their height or length or even age. Some of the most famous are The Golden Gate bridge in San Francisco, the Brooklyn Bridge in New York, the Akashi-Kaikyo in Japan and the Tower Bridge in London.
The Tacoma Narrows Bridge crosses the Tacoma Narrows of the Puget Sound, it collapsed in 1940.
What body of water goes under the channel tunnel?
The English Channel.
You have two options for travelling through the Channel Tunnel. You can take a high speed passenger train, or you can take put your car one of the vehicle transporting trains.
A train takes approximately 25 minutes to go through the Channel Tunnel.
The Eurotunnel Shuttle is the brand name for the car carrying trains which run through the Channel Tunnel between Folkestone and Calais.
Eurostar is the brand name of the company running high speed trains London-Paris and London-Lille-Brussels through the Channel Tunnel.
Eurostar uses the stations: St. Pancras (London), Gare du Nord (Paris), Bruxelles Midi (Brussels) and Lille Europe.
Currently these are the only passenger trains operating through the tunnel.
The Eurostar takes 2 hours 15 minutes between London and Paris. There is approximately one train per hour in each direction.
What is the biggest bridge in th eworld?
Danyang-Kunshan Grand Bridge on the Beijing-Shanghai High-Speed Railway in People's Republic of China is the largest and the longest bridge in the world.
It is 164,800 meters long and spans 80 meters.
What is the longest country in the world?
The longest from one end to the other is Russia. East to west it is over 4000 miles, and including its Arctic islands, the north-south distance is about 2800 miles, about the same as the north-south extension of Brazil. Only Canada has a greater difference in latitude.
Brazil extends 4,395 kilometers (2,731 mi) from north to south (5°16'20" N to 33°44'32" S latitude). This is longer in north-south distance than Chile.
Why are there so many different types of bridges?
1. Suspension bridge
2. Cable stayed bridge
3. Arch bridge
4. Stone masonry bridge
5. skew slab bridge
6. Void slab bridge
7. Continous bridge
8. Rigid frames
9. Truss bridge
10. Pre-stressed Bridge
When was the Channel Tunnel built?
The channel tunnel started being built in 1987, and it was finished in 1993. It opened in 1994.
Who invented the structural steel bridge?
simeon s. post made the truss bridge, but never received a patent
How many vehicles cross the bay bridge each day?
On a average day atleast 120,000 vehicles cross the bridge a day
Can you get from NJ to RI without going through the Holland Tunnel?
Yes, there are many other options.
Coming from New Jersey:
I-95/US 1/US 9 - George Washington Bridge ($15.00 for a car)
I-78 - Holland Tunnel
SR 440 - Outerbridge Crossing
I-278 - Verrazano-Narrows Bridge
Coming from North of the City: I-87 - Major Deegan Expy
SR 9A - Henry Hudson Pkwy
I-95 - Cross Bronx Expy
Arch bridges have abutments at each end. The weight of the bridge is thrust into the abutments at either side. The earliest known arch bridges were built by the Greeks, and include the Arkadiko Bridge.
With the span of 220 metres (720 ft), the Solkan Bridge over the Soča River at Solkan in Slovenia is the second largest stone bridge in the world and the longest railroad stone bridge. It was completed in 1905. Its arch, which was constructed from over 5,000 tonnes (4,900 long tons; 5,500 short tons) of stone blocks in just 18 days, is the second largest stone arch in the world, surpassed only by the Friedensbrücke (Syratalviadukt) in Plauen, and the largest railroad stone arch. The arch of the Friedensbrücke, which was built in the same year, has the span of 90 m (300 ft) and crosses the valley of the Syrabach River. The difference between the two is that the Solkan Bridge was built from stone blocks, whereas the Friedensbrücke was built from a mixture of crushed stone and cement mortar.[13]
Dubai in the United Arab Emirates is currently building the Sheikh Rashid bin Saeed Crossing, which is scheduled for completion in 2012. When completed, it will be the largest arch bridge in the world, with a main span 667 metres (2,188 ft) long.
What is Sydney Harbour Bridge made of?
Materials used to construct the Sydney Harbor Bridge include: About 6,000,000 steel rivets, 2,800 tons of steelwork, including arch and mild steel approach spans, 122,000 cubic meters of rock was excavated for foundations. 95,000 cubic meters of concrete was used. 17,000 cubic meters of granite facing was used on the pylons and piers. 272,000 liters of paint were used for the initial 3 coats of paint. The span of the bridge was constructed using steel (mostly imported from the UK) with the pylons being constructed from granite and concrete. The deck is asphalt and concrete, and there are two railway lines across on concrete sleepers.
When was Quebec bridge completed?
On 29 August 1907, the south arm and part of the central section of the Quebec bridge collapsed into the river in a matter of seconds. Of the 86 workers on the bridge at the time, 75 were killed.
A second collapse during construction in 1916 killed another 11 people. The bridge was finally completed in 1919.
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Basketball is the NBA National Basketball Association
so in case the castle that was in danger by invaders they would raise the draw bridge and it would make it harde to get in
