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赵州桥又名安济桥,在河北赵县城南五里交河上,为隋炀帝大业年间石匠李春所修建,到现在已有1,300余年,是我国最古最大的石拱桥。它是空腔式单孔圆孤拱,净跨经37公尺,拱矢度7.23公尺。根据测量拱腹各点高度反求半径。西侧是27.7公尺,东侧是27.3公尺。靠主拱拱脚处,两端各有两小孤拱,互相对称,十分壮丽。两端较大的两个小拱,平均跨径为4.0公尺,拱腹半径2.3公尺。里边两个小拱平均跨径2.75公尺,拱腹半径1.5公尺。主拱圈和四个小拱圈的高度都是拱顶与拱脚相同。主拱高1.02公尺,四个小拱都是0.65公尺,大小拱
Zhaozhou Bridge, also known as Anji Bridge, was built in Wulixian, south of Wuxian County in Hebei Province, for the construction of Emperor Li Chun during the Great Emperor of Sui Dynasty. Until now, it has been 1,300 years and is the oldest and largest stone arch bridge in our country. It is a cavity single hole round arch, the net span of 37 meters, 7.22 meters arch degrees. According to the measurement of soffit each point height reverse radius. 27.7 meters west and 27.3 meters east. By the main arch arches at both ends have two small arches, symmetrical to each other, very magnificent. Larger two ends of the two small arch, the average span of 4.0 meters, soffit radius of 2.3 meters. Inside the two small arches average span of 2.75 meters, soffit radius of 1.5 meters. The height of the main arch and the four small arch are the same dome and arch feet. The main arch of 1.02 meters high, four small arches are 0.65 meters, the size of the arch