general situation
Dong Zhang branch line is located on the north side of the middle section of Ji Jiao Railway, which diverges from the east head of Zhangdian Station of Ji Jiao Railway and goes north to Dongying. 1985 main line length is 89.438+0km. In addition, the railway line from Duke to Hutian 1.8 16 km, and the station line is extended by 36.794 km. Total length 145.534 km. The line is in Zibo, from Zhangdian to the north of Suozhen, with a total length of 27.6 kilometers. There are three stations in Duke, Nongzhong and Suozhen. The terrain along the line is high in the south and low in the north, but the slope is not big and the line is relatively straight. The elevation from Zhangdian to Nongzhong Station is 50m, with an average ground slope of 2 ‰; The elevation from Nongzhong to Dongying Station is about 7 meters, and the average ground slope is 0.4‰. It is a national standard third-class railway operation line.
line construction
The original Zhangbei local light rail was surveyed and designed by the Third Design Institute of the Ministry of Railways in 1960, and some design documents were put forward according to the track gauge of 762 mm Later, according to the requirements of Shandong local railway conference, the track gauge was changed to 1435 mm light rail, and the main technical standard conditions for design were: minimum curve radius 120 m, and slope limit of 5 ‰; The main line is 774,000 Li Long, with 3 stations/kloc-0 and 53 bridges and culverts, and the annual freight volume 1.47 million tons.
1959, Zhangbei local light rail project headquarters was established by Shandong Provincial Communications Department and Zibo Agency, and construction started in February 1960, organizing Zibo Agency and 52,000 migrant workers in Boxing and Zhangdian counties to carry out construction. Zhangdian and Wangwangzhuang Station1654381October were simply opened to traffic, with 86 kilometers of track laying. The line was carried out under the conditions of "survey, design, construction and simple operation", some sections were not paved with ballast, and the locomotive was a diesel locomotive modified from a car, and water was added manually. By 1963, most of the projects have not reached the standard requirements, that is, simple operation. By 1966, the accumulated investment was 9,577,500 yuan.
With the discovery and development of Shengli Oilfield, at the beginning of 1966, Zhangbei Local Railway Bureau negotiated with Shengli Oilfield and proposed to extend the railway reconstruction. 1967 In the second half of the year, with the approval of the Ministry of Railways, the Ministry of Petroleum and the State Planning Commission, it was decided to invest in the construction of a new line from Boxing to Dongying every year and transform Zhangdian to Boxing. The reconstruction and expansion project of Dong Zhang branch line started from 1966 to 65438+ on February 2, 2006. The survey and design are mainly undertaken by Jinan Bureau, and the extension of Zhangbei Railway and Shengli Oilfield are both in charge. 1968 10, the original design of Zhangbei railway extension was modified: the design standard was changed from secondary to tertiary railway branch line, and the minimum curve radius was 600 meters (300 meters between Zhangdian and Duke); The annual transportation volume is 2.7-3.3 million tons; Zhangdian Locomotive Depot is the locomotive depot, the locomotive turn-back depot is located in Boxing, and the train inspection office is located in Duke. The project is carried out in two stages. The first phase of the project is from Zhangdian to Chenhu Station, with track laying (including station line) of 61.578 km; The second phase of the project is a new section from Boxing to Dongying, with 63.355 kilometers of track laying (including station lines). The project started in February 1966 and was opened to traffic from Zhangdian to Chenhu Station at the end of September 1970. The whole line was simply opened to traffic on New Year's Day 1972, with a cumulative investment of 252 18600 yuan. The original Zhangbei light rail * * * acquired 4447 mu of land, with a price of 56.9 yuan per mu; After the expansion of Dong Zhang Branch, * * * covers an area of 1 1,000 mu. During construction, large areas of soil are taken from both sides of subgrade, and then leveled immediately to save fertile land.
Handover and temporary management
According to the decisions of the State Planning Commission, the Ministry of Communications and the Ministry of Fuel and Chemical Industry, the Production Command of the Revolutionary Committee of Shandong Province instructed Jinan Bureau and Zhangbei Local Railway Bureau to form a handover leading group, and handed over from1October 20th 1972 165438+ to the end of February 65438+. From 1 97365438+1October1,it was officially handed over to Jinan Bureau, which was managed by the newly established Dong Zhang Line Temporary Management Office of Qingdao Railway Branch. By adopting the method of "maintaining roads by roads", the problems of supporting projects such as construction, track extension and station expansion, technical transformation and engineering disease treatment were gradually solved from the operating income of the temporary management, so that the whole project basically reached the formal operation conditions and was put into formal operation on February 1976+0.
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