Brief introduction of Rainbow Bridge in Baishan, Jilin

Classification: region >> Jilin >; & gt baishan city

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Wuyuan has a very distinctive bridge-covered bridge. A covered bridge is a bridge with a roof. This bridge is not only beautiful in appearance, but most importantly, it can provide a resting place for pedestrians in rainy days. Rainbow Bridge, an ancient bridge built in Song Dynasty, is the masterpiece of Wuyuan covered bridge. This bridge is named after the Tang poem "Two Rivers Reflect in the Mirror, Two Bridges Fall in the Rainbow". The bridge length is 140m, the bridge deck is more than 3m wide, with 4 piers and 5 holes. It consists of 1 1 pavilions, stone tables and benches. The scenery around the Rainbow Bridge is beautiful, with beautiful green hills and clear water. Sitting here for a short rest and browsing the surrounding scenery will make people deeply appreciate the beauty of Wuyuan.

The biggest feature of Rainbow Bridge is that its design is very scientific. First, the pier is like a half-boat, with a sharp front and a flat back, which is streamlined and can decompose the impact of flood on the pier. It is because of scientific design that the ancient bridge can be preserved today. The highest water level recorded in history was close to the bridge deck, when floods raged. If the pier head had been flat, the bridge would have been destroyed by the flood. Second, the distance between piers is not equal. The maximum span between piers is twelve meters eight, and the minimum span is nine meters eight, with a difference of three meters. This design is determined according to the flood trend in flood season. The main stream passes through the pier with a long distance, which is beneficial to flood discharge and has little influence on the pier; Where the water flow is gentle, the distance between piers is small, and the influence of flood is relatively small. Third, the masonry method between stones is exquisite. The piers are clamped together with stone strips of different sizes, and the gap is very small and the combination is very firm. This is because the pier is filled with sand and gravel. Once cracks appear in the stone, it will be hit by floods for many years, and it is easy to enlarge the hole. When the sand and gravel are emptied, the pier will collapse. It is difficult to build a pier, and the maximum water depth of the pier is four or five meters. Under the backward production conditions at that time, it was very difficult to clear the rock foundation and build hundreds of kilograms or tons of stones. More than a dozen agricultural water trucks are needed to pump water around the clock to remove stones. Therefore, the original builders wanted to finish the pier and would never rebuild it once and for all. The pier is the most exquisite part of the whole ancient bridge. The wooden part of the bridge deck is designed and considered from the continuity and long-term nature of the bridge. Do it from the perspective of economy, firmness, durability and easy maintenance. At first glance: the structure is simple, the workmanship is rough, the tenon gap is large, and the corridor is not in a straight line. It shows that the requirements for carpenters are not high, and they are made by ordinary carpenters. The advantage of this is that the bridge is broken, carpenters can be found at any time, and the price is the lowest. Like the houses and ancestral temples of the rich in Wuyuan, they were magnificent when they were built, and now they have financial resources. It is difficult to find a skilled craftsman in maintenance, and it can only disappear with history. But the bridge can't be like this, and generations of children have to go. Therefore, the builders of the bridge took great pains to keep the bridge intact to this day. Although it was built by ordinary carpenters, it embodies the artistic style of simplicity and heavy sense of history.

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