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How was the 13 iron chain Luding Bridge, which weighed 40 tons more than 300 years ago, built?
The total length of Luding Bridge is103m, and the width is 3m. There are 13 iron chains on both banks, and * * * there are 12 164 iron rings interlocking with each other. The whole bridge weighs more than 40 tons. Cable-stayed bridges like this are not modern products. It was built in the Kangxi period more than 300 years ago. At that time, there was no machinery, basically relying on manpower. So, how did craftsmen build Luding Bridge on the Dadu River more than 300 years ago?

Luding Bridge, also known as Dadu Bridge and Tiesuo Bridge, is located on the Dadu River in Luding County, Sichuan Province. According to historical records, Luding Bridge was built in the forty-fourth year of Qing Emperor Kangxi (1705). Emperor Kangxi spent a lot of manpower, material resources and financial resources to build this iron chain bridge in this remote place, not because it was the construction of people's livelihood, but because it was the main road to Tibet, in order to facilitate the transportation of troops and quell the rebellion in Junggar. So, after the construction was completed, Emperor Kangxi wrote a calligraphy? Luding Bridge? Three words, horizontal batch is? Unified rivers and mountains? .

Luding Bridge has 13 iron chains and 10000 iron rings, weighing more than 40 tons. It was almost impossible to build such an iron chain bridge in ancient times. According to local legend, many methods have been used to build the iron cable bridge, but it is always impossible to bring the 13 chain to the other side. As a result, a Tibetan strongman who claimed to be Gada crossed the river with 1 chains under his arm, but when he finished carrying 13 chains, he died unfortunately because of overwork.

According to historical records, the above statement about Hercules crossing the river to install chains is just a legend. The historical truth is that more than 300 years ago, when ancient craftsmen were building iron cable bridges, they did encounter the big problem of crossing the river with 13 chains. To this end, craftsmen held a seminar, and finally adopted the principle of cable crossing, that is, tied thick bamboo cables on both sides, each bamboo cable has more than 10 short bamboo tubes, then tied iron chains on the bamboo tubes, and then pulled the rope tied to the bamboo tubes from the other side, thus skillfully pulling the bamboo tubes and iron chains to the other side. After solving this big problem, it took craftsmen only one year to build this 40-ton iron cable bridge, which is amazing.

This 300-year-old iron cable bridge has too many stories and witnessed many historical events. On May 29th, 1935, the Long March of the Red Army passed through here. At that time, in order to cross the Dadu River, Luding Bridge had been demolished by the enemy for about 80 meters. The Red Army Commandos were led by 22 soldiers, armed with submachine guns, sabers on their backs and more than a dozen grenades hanging around their waists. They braved the bullets, climbed the slippery cable chain and swooped down the east bridge, braved the bullets of the enemy, wiped out the guards at the bridgehead and seized the Luding Bridge in one fell swoop. The flying capture of Luding Bridge opened the way for the Red Army to go northward to resist Japan, which is of great historical significance to our army.

The Luding Bridge on the Dadu River has been used for more than 300 years since its completion, and it has been serving the local people so far, which makes people have to admire the quality of the ancient bridge, unlike some newly-built bridges, which will collapse when the wind blows. The bean curd residue project is just a joke!