Line construction of Zhangdong Railway

The original Zhangbei Local Light Railway was surveyed and designed by the Third Design Institute of the Ministry of Railways in 1960. Some design documents were proposed based on the 762 mm gauge. Later, according to the requirements of the Shandong Provincial Local Railway Conference, the gauge was changed to 1435 The main technical standard conditions for the design of the mm light railway are: the minimum curve radius is 120 meters, the limited slope is 5‰; the main line is 77.400 miles long,

13 stations, 53 bridges and culverts, and the annual freight volume is 1.47 million tons. In 1959, the Shandong Provincial Department of Transportation and the Zibo Special Administrative Office established the Zhangbei Local Light Railway Engineering Headquarters. Construction started in February 1960, and 52,000 migrant workers from the Zibo Special Administrative Office and Boxing, Zhangdian and other counties were organized for construction. In November of that year, the project started from Zhangdian to The Wangwangzhuang station has been easily opened to traffic, with 86 kilometers of track laid. The line was carried out under the condition of "surveying, designing, construction, and simple operation". Some sections of the road were not paved with gravel, and the locomotives were diesel locomotives modified from automobiles, and water was manually supplied. By 1963, most of the lines were The project has not yet met the standard requirements for simple opening to traffic. By 1966, a total investment of 9.5775 million yuan had been completed. With the discovery and development of Shengli Oilfield, in early 1966, the Zhangbei Local Railway Bureau negotiated with Shengli Oilfield and proposed extending and transforming the railway. In the second half of 1967, the Ministry of Railways and the Ministry of Petroleum jointly reported to the State Planning Commission for approval and decided to invest in years to build a new line from Boxing to Dongying and renovate the line from Zhangdian to Boxing. The Zhangdong branch line reconstruction and expansion project started on December 2, 1966. The survey and design were mainly conducted by Jinan Bureau, and the Zhangbei Railway Expansion Office and Shengli Oilfield were also responsible for the survey and design. In October 1968, the Zhangbei Railway Expansion Office revised the original design: the design standard was changed from the original level II to a level III railway branch line, with a minimum curve radius of 600 meters (300 meters between Zhangdian Duke); the annual transportation volume is 270 10,000 tons to 3.3 million tons; the Zhangdian locomotive depot is the main locomotive section, the locomotive return section is relocated in Boxing, and the train inspection station is relocated in Duke. The project is carried out in two phases. The first phase of the project is from Zhangdian to Chenhu Station, with 61.578 kilometers of track laying (including station lines); the second phase of the project is the newly built Boxing to Dongying section, with 63.355 kilometers of track (including station lines) laid. The project started in December 1966 and was opened to traffic from Zhangdian to Chenhu Station at the end of September 1970. The entire line was opened to traffic on New Year's Day in 1972, with a total investment of 25.2186 million yuan. The original Zhangbei Light Railway acquired 4,447 acres of land at a cost of 56.9 yuan per mu. After the expansion of the Zhangdong branch, the land area was 10,000 acres. During the construction, large areas of soil were taken from both sides of the roadbed and then leveled. To save fertile land.