The 4 most difficult railways in China account for nearly 50% of the total length of bridges and tunnels, and the tourism industry has become a hot spot
Looking back on the history of railway construction in New China, there are always some years that are unforgettable, especially the construction of Chengdu-Kunming Railway, Qinghai-Tibet Railway, Yi-Wan Railway, and Bao-Chengdu Railway. Let's take a look at the relevant data of these railways.
- Chengdu-Kunming Railway
The Chengdu-Kunming Line starts from Chengdu, Sichuan Province in the north and Kunming City, Yunnan Province in the south. It is an important railway line in the southwest region and even the whole country. The total length of the line is 1096 kilometers, of which more than 700 kilometers pass through the mountains of southwestern Sichuan and northern Yunnan. , the valley where it passes is deep and steep, and the geological conditions are extremely complicated. Even so, the railway soldiers have overcome all difficulties and opened the railway.
Because the construction of the Chengdu-Kunming Railway is extremely difficult, it has created a miracle in the history of railway construction in the world. The moon rock brought back by the Chengdu-Kunming Railway and the Apollo of the United States, and the first artificial earth satellite of the Soviet Union were called by the United Nations as "the three miracles that symbolize the conquest of nature by mankind in the 20th century".
- Qinghai-Tibet Railway
The Qinghai-Tibet Railway is known as the "Heavenly Road". It starts from Xining City, Qinghai Province in the north and ends in Lhasa City, Tibet Autonomous Region in the south. . On August 16, 2014, the Lari Railway (full name: 253 kilometers), an extension of the Qinghai-Tibet Railway, was also put into operation across the board.
The Qinghai-Tibet Railway passes through the world's largest and highest plateau, and the climate and geological environment are extremely complex. Due to the three world-class problems of thousands of miles of frozen soil, high cold and hypoxia, and ecological fragility, the construction of the Qinghai-Tibet Railway is extremely difficult. One of the four major projects in the new century in China, it is also a monument in the history of railway construction in the world. In September 2013, it was selected as the "Global Centennial Project".
- Yiwan Railway
The Yi-Wan Railway starts from Yichang City, Hubei Province in the east, and reaches Wanzhou District, Chongqing City in the west. The total length of the line is 377 kilometers. Since the Yi-Wan Railway is built in the mountainous areas of the Caster landform and traverses the Wushan Mountains, the total length of its bridges and tunnels is 377 kilometers long. The length is about 278 kilometers, accounting for 73.8% of the total length of the line. The construction of Yiwan Railway fills the gap of 700 kilometers of no horizontal railway between Longhai Line and Zhejiang-Jiangxi Line and 240,000 square kilometers of no railway in Hubei-Chongqing-Hunan-Guizhou Border Area, which greatly facilitates the connection between east, middle and west. It is of great significance for the country to implement the western development strategy, to accelerate the development of the central and western regions, and to promote the prosperity of the minority areas.
From the end of the Qing Dynasty when Zhan Tianyou was commissioned to build the Sichuan-Hanzhou Railway (1904) to the official opening of the Yi-Wan Railway (2014), it spanned 110 years of history. The reason why the Yi-Wan Railway is "difficult to repair" is not because of its line 74% are bridges and tunnels, but the karst landforms are difficult to blend with mountains and rivers. Many geological risks such as water inrush, mud inrush, karst, collapse, etc. have become "stumbling blocks" one after another in the construction.
- Baocheng Railway
Baocheng Railway starts from Baoji City, Shaanxi Province in the north, and reaches Chengdu City, Sichuan Province in the south, passing through Shaanxi, Gansu, and Sichuan provinces, and connecting with the Chengdu-Chongqing Railway, the Chengdu-Kunming Railway, the Longhai Railway, and the Baozhong Railway, with a total length of 669 kilometers. , is the first mountain electrified railway connecting the northwest and southwest regions.
The Baocheng Railway passes through the Qinling Mountains and Daba Mountains from north to south, and finally reaches the Sichuan Basin, which is known as the Land of Abundance. Due to the large altitude difference, many sections of the line have steep slopes, long slopes and many curves. It has been built into a circuitous and circling exhibition line. The largest exhibition line, the Guanyin Mountain exhibition line, actually coiled for 27 kilometers within a straight-line distance of 6 kilometers, and there was a scene of overlapping three-layer railways.