The story of cable bridge Who built the cable bridge and how?

Who built this cable bridge is still unknown. Cable bridge is a bridge with bamboo cable, rattan cable and iron cable as the backbone.

It is mainly composed of bridge tower (including foundation), main cable (also called big cable), stiffening beam, anchorage (gravity type and tunnel type), sling (also called suspender), saddle (main saddle and loose cable saddle) and bridge deck structure.

At present, most of them are ground anchors. Generally, the construction of ground anchor is to erect the bridge tower, that is, the main tower, then anchor the large cable, then construct the suspenders and stiffening beams, and finally construct the bridge deck.

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History of cable bridge:

The development of history

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It was first seen in Qin and Han Dynasties. For example, Qin built a bamboo cable bridge in the southwest of Yizhou (now Chengdu) in Sichuan, also called Yili Bridge. The existing famous ones are Luding Iron Cable Bridge and guanxian Bamboo Cable Bridge built in Ming and Qing Dynasties. Crossing the cable bridge feels very thrilling, just as the ancients described the cable bridge: "People are hanging in the air, and if they don't quit in an instant, they will fall into a bottomless valley."

Many foreign bridge experts believe that cable bridges originated in China, pointing out that "China began to build suspension bridges about 3,000 years ago". Tang Dongjiebu (1385 ~ 1464, or Jiasang Zhugu, which means "Living Buddha of Tieqiao") of the Tibetan people in the 14th and 5th centuries was an engineering and technical expert who was building a cable bridge on the Yarlung Zangbo River and other rivers in Tibet at that time.

It is said that he once drew a sketch of the iron cable bridge on the Yarlung Zangbo River, with a span of1.38m and a completion time of 1.420. It is the largest iron cable bridge in ancient China. There are towers at both ends of the bridge, which are only wide enough for people. At present, the earliest cable-stayed bridge that has been verified is the Yunxiang Bridge in Yizhou (now Chengdu), Sichuan Province, which was built in the middle of Shu in the Qin Dynasty (25 1), more than 2,200 years ago.

Qianjiang River, also known as Yixing Bridge, spans the south of the city and was one of the seven bridges built in the shape of the Big Dipper at that time. In Yi Zhou Ji, Wang Bao of the Western Han Dynasty recorded that the street bridge was at the step of 100 south of Sima Xiangru House. During construction, three large iron vertebrae are used to tie the bamboo cable of the bridge column (there are only two iron vertebrae at present).

The Biography of Huan Wen in the Book of Jin records that in the third year of Yonghe (347), when Huan Wen attacked Chengdu, he fought on the Ruxiang Bridge. It can be seen that after nearly 600 years, Rue Bridge is still there. Legend has it that Zhuge Liang once bid farewell to Fei Yi, who started his career in Soochow. In the early days of liberation, when we visited Father's Terrace in Sima Xiangru, we excavated a big iron vertebra under the ancient bridge foundation on the Jinjiang River west of Nanmen Bridge today, which proved that this was the former site of Rue Bridge.