bridge作文2000字

　　Bridge, is to each kind of bridge. Actually, according to the different use function, can be divided into "pedestrian bridge", "the car bridge", human overpasses and motorised vehicle constitutes urban highway system "interchange viaduct" and so on.

　　The structure of the bridge, with the rapid development of science and technology and industrial production is also in the development and change constantly. Now has a beam bridge structure, steel structure bridge, suspension bridge structure, suspension bridge structure, and so on many kinds of.

　　The structure of the bridge, with the rapid development of science and technology and industrial production is also in the development and change constantly. Now has a beam bridge structure, steel structure bridge, suspension bridge structure, suspension bridge structure, and so on many kinds of.

　　The shape of the bridge is various, the style each different. Pedestrian bridge generally have one word, T word, cross, S, Y, U, all the amorphous, according to the topography and flexible design. Dealership bridge basic types of diamond, alfalfa, ring type, horn, etc. In short, as long as the function, structure and shape perfectly together, can achieve good effect of art and technology.The bridge in the city, not only is a sign of prosperity in cities, more major is it in the aspects of urban transportation, energy, benefit play a huge role. With Shanghai yanan east road pedestrian bridge as an example, after the commissioning of the bridge, the bridge nearby within 100 meters of motor vehicle speed increased by 28%, compared with the previous and a 80% drop in traffic accidents and its economic benefit and social benefit is obvious. Since 1964 in guangzhou to build the first overpass in China, Beijing, Shanghai, tianjin, guangzhou and other major cities are built by all kinds of intersection has reached thousands of, in the aspects of urban transportation, energy, benefit plays a huge role.