From 1936 to 1948, after many surveys and comparisons, Tianshui-Chengdu scheme was selected, but construction was not started.
1950 to 1953, Tianshui-Lueyang and Baoji-Lueyang sections are further surveyed, and Baoji-Chengdu scheme is selected.
Baoji-chengdu railway started construction at Chengdu end on July 1952, Baoji end also started construction on July 1954, and both ends were connected with Huangsha River in Gansu on July 1956.
1July 956/morning of kloc-0/3 10, the connection ceremony was held in Huangshahe, Huixian County, Gansu Province. After the red curtain on the triangular contact sign like the iron tower was removed, the colorful locomotives sounded a long sound, spit out a wisp of white smoke, and slowly drove the float from south to north. More than 200 local people's representatives sitting in the carriage were outside the window, smiling and waving to the applauding people. When the construction entered a tense stage, about half of the labor force and four-fifths of the mechanical road construction force of the newly-built railways in China were used. The construction of this railway. It took more than four years; The connection time is more than thirteen months earlier than the date specified in the design document.
1 958 65438+1October1officially opened to traffic, and the whole line was pulled by steam locomotives and officially put into operation.
From June 1958, the electrification reconstruction project was carried out in baoji-chengdu railway, and the Baoji-Fengzhou section project was completed on June 1960. 1The remaining part of the reconstruction project was completed in June 1967, and1July 1975, making it the first electrified railway in China.
With the further development of reform and opening up, as a single-track electrified railway, the technical level and transportation capacity of Baocheng Line are far from meeting the needs of economic development. 1994, the state decided to invest 5.7 billion yuan to carry out the electrification construction of Baocheng double-track line and the electrification transformation of existing lines.
1 July, 9961day, the electrification construction of Baocheng double-track line and the electrification reconstruction project of existing line officially started. The design and construction methods of this reconstruction project have been greatly improved. A large number of new technologies, new materials and new equipment have been adopted in the whole line, especially the extensive application of computer technology, which has greatly improved the work efficiency and ensured the engineering quality.
At the end of 1998, the main project of double-track and electrification transformation of this line has been completed. 1October 8th, 165438, the electrification of Guangyuan-Jiangyou double track was opened. After completion, the annual transportation capacity of Baocheng Line will be increased to more than 40 million tons, which is 1.5 times higher than in the past, and the speed will be increased from 60 kilometers to 80 kilometers per hour. Baocheng electrified railway, which is "recharged" again, will take off with the western economy for the second time.
Opening of the section from Yangpingguan to Guangyuan of Baocheng double-track railway: Xinhua News Agency An1999 65438+February 26th The section from Yangpingguan to Guangyuan of Baocheng double-track railway was opened for operation today. At this point, the Baoji-Chengdu double-track railway (Yangpingguan-Chengdu section), which started construction in 1993, runs through the whole line, and the originally narrow northbound railway passage in southwest China is greatly widened. Baoji-chengdu railway is the first electrified railway in China, and it is also one of the main passages from southwest to north. 1956 was completed and opened to traffic. With the development of economy, this railway has been overloaded for a long time.
In order to alleviate the shortage of southwest railway transportation and create conditions for the construction of an international continental bridge connecting Russia, China, Myanmar and Vietnam, the Ministry of Railways decided to build Baocheng double-track railway. Baocheng double track is 396 kilometers long. Although the section from Yangpingguan to Guangyuan is only 73 kilometers long, it is located in Qinba Mountain area, with narrow terrain, rugged mountains and steep valleys. The Jialing River is fast-flowing and the rocks along the coast are broken, and the length of bridges and tunnels accounts for more than half of the length of the line. In addition, this project is the first time to build a second line on the electrified railway operated in China. The construction of station and power grid reconstruction is from the air to the underground, which can be described as "encirclement" and the construction is extremely difficult.
According to reports, after the completion of Baocheng double-track railway, the passenger capacity will increase from 43 pairs to 78 pairs per day, reaching 1 12 pairs in 2005; The freight capacity has increased from 1 1.58 million tons per year to 50 million tons.