Acting as a narrator (tour guide) to introduce the structural characteristics of Zhaozhou Bridge and Lugou Bridge about 400 words

Stone arch bridge is one of the four basic forms of traditional Chinese Han bridges, stone arch bridge this system is varied, but in general, "material saving, structural ingenuity, high strength," can be summarized in the ancient stone arch bridge technology achievements, which is ancient and modern bridges, as well as any building unanimously pursued the goal.

After the introduction of modern railroad and highway bridge engineering technology into China in 1880, it still maintains its vitality, showing the ingenuity of the ancient Han Chinese working people and the brilliant achievements of ancient bridge construction.

The structural characteristics of Zhaozhou Bridge: First, the whole bridge has only one big arch, 37.4 meters long, the bridge hole is not an ordinary semicircle, but like a bow. Second, on each shoulder of the big arch, there are two small arches. Third, the big arch is formed by 28 arch rings. Fourth, the whole bridge has a uniform structure.

The structural characteristics of Lugou Bridge: it consists of 11 semicircular stone arches, each of which varies in length from 16 meters to 21.6 meters, and the bridge is about 8 meters wide, with a flat pavement almost parallel to the river. Between every two stone arches there are stone masonry piers, the 11 stone arches into a whole, is a joint-arch stone bridge.