What are the three characteristics of Zhao Zhouqiao's article?

The three characteristics of Zhao Zhouqiao are solemnity, firmness and beauty.

Zhao Zhouqiao is a world-famous stone arch bridge designed and built by Li Chun, a stonemason in Sui Dynasty. Zhao Zhouqiao is not only majestic, solid, but also beautiful. It embodies the wisdom and talents of ancient working people and is a precious historical heritage of our country.

Zhao Zhouqiao, also known as Anji Bridge and Dashiqiao, is a stone arch bridge located on the Weihe River in the south of Zhao County, Shijiazhuang City, Hebei Province. Zhao Zhouqiao was built in the Sui Dynasty, designed and built by craftsman Li Chun. It is the oldest, longest span and best preserved single-hole open-shouldered stone arch bridge in the world. The bridge is over 50 meters long and 9 meters wide, with horses in the middle and people on both sides.

Structural characteristics of bridges

1. Round arch with shoulder: two symmetrical small arches are built on the shoulder of the main arch, which conforms to the principle of structural mechanics, increases the drainage area by 16.5% and saves stone.

2. Long span, flat arc: single-hole long span, no pier in the middle of the river, arc arch, stone arch height reduced. It is superior to the characteristics of small single span and many piers of porous bridges, which is not conducive to flood discharge.

3. The ends are wide and the middle is narrow.

4. Vertical parallel masonry method.

In the construction of Zhao Zhouqiao, the hard blue-gray sandstone produced in nearby counties was selected as the stone, and the circular arch was used to reduce the height of the stone arch. The net span of the main hole is 37.02 meters, but the arch height is only 7.23 meters, and the ratio of arch height to span is about 1 ratio 5, which realizes the dual purposes of low deck and large span.

Reference to the above content: Baidu Encyclopedia-Zhao Zhouqiao