general situation
The line starts from Xindian, the second terrace of Hezi River, enters the mountainous area to the southwest, and reaches the highest point of the line, Changzhuang Basin (70km+850m), with an altitude of 366.76m m. The terrain from Changzhuang to Laiwu East Station is relatively flat, followed by Fanzhen Station, which is a hilly area, and then to Taian Station, which belongs to the relatively flat Tailai Basin. The geology of the whole line includes granite, limestone, shale mixed with thin sandstone, sandy pebble and clay sand. The annual maximum precipitation in Laiwu area is 1369 mm, and the daily maximum precipitation is168.8mm; The highest temperature is 39.2℃ and the lowest temperature is-2.5℃; The main rivers crossing the line are He Zi River and Wenying River. The annual runoff of most valleys along the line is irregular, and the groundwater level is generally below 6 ~ 10 meter. The earthquake intensity from Nanmiaoshan to Fanzhen is 7 degrees, and the rest is 6 degrees. There are iron mines, coal mines and petrochemical products along the line. Its completion connects the trunk lines of Ji Jiao and Jinpu railways, which relieves the pressure of Jinan hub and plays a role in railway diversion, strengthening war preparedness and developing mountain economy.
line construction
Initially designed as a new store-Dashijia, the later line hub station was changed to Taian Station of Jinpu Railway. The main project of the whole line will be carried out in three phases. The first phase of the project started from Tieshi Station to Heiwang, with the main line of 18.4km, including Qiu Nan, Liu Zheng and Heiwang stations and the tie line of 2.466 km from Tieshi Station to Qiu Nan Station, and started in April of 1970 (as the original new light rail store of Heiwang Iron Mine is 6.6 km to Qiu Nan, the ore transportation is temporarily reserved; After the tie line from Tieshi to Qiu Nan and Heiwang section are completed, the ore transportation will be diverted and will not be greatly affected, so the tie line will be built first. In this project, there are 5 militia groups composed of 5 counties (districts) in Zibo and Changwei, with a total of 1.3 million migrant workers, and more than 200 professional construction teams from the 4th and 7th engineering teams of Jinan Railway Bureau and the 4th and 7th engineering teams of jinan military area command. 197 1 the first phase of the project was completed and opened to traffic on June 1. The main line of Heiwang-Zhuangzhuang section of the second phase of the project is 25 km to 60 km, the main lines of Xitonggu, Beimou, Xishimen, Qianyuan Station and Xindian-Station are 6.6 km, and Xintai Line is to the railway 1.479 km. About 50,000 people from Changwei area and Zibo 15 militia participated in the construction of this project. In the second phase, from June 1970 to1October 1973, more than 3 million cubic meters of earth and stone were completed, including 6 large and medium-sized bridges with 664 linear meters and 2 tunnels with 7089 linear meters. Since the third phase of the project 1973, in order to speed up the progress of the project, the Ministry of Communications has dispatched the No.1 Highway Bureau and the No.2 Railway Bureau, and Shandong Province has also dispatched a large number of migrant workers. The subgrade, small bridges and culverts, and housing construction works in the section from 60 km to 86.26 km of the main line are organized by six militia in Linyi area; Xiejiadian Bridge and five tunnels from Wangjiazhuang to Yangjiaheng were constructed by the Second Engineering Brigade of Jinan Railway Bureau with the cooperation of yinan county militia. By the end of 1973, except for the reconstruction of Miaoziling tunnel and Fanzhen overpass, all other projects have reached the level of track laying. 1974 1 month, the construction entered the stage of track laying and beam erection, and the whole line was simply opened to traffic on July 1 day. 1980 65438+February 3 1 officially put into operation. The total investment of this line project is 2.24 1.4 million yuan, and the average cost per kilometer is1.4 million yuan.
Technical reform
198 1 year 1 month 1 day, after Xintai Railway officially handled the transportation business, 1982, Zhangjiawa Iron Mine introduced its special line to Linjialou Station, and the mine invested to build four more lanes at the station; 1982 to 1983, the economic bureau plans to invest 2167,000 yuan, increasing the number of small and medium-sized projects. Other major production equipment basically maintained the status quo 1980.
By the end of 1985, the number of passengers19.83 million had been sent. Due to pipeline transportation and other reasons, the freight volume is only 7.764 million tons. The highest freight volume in 1985 is177100000 tons, accounting for only 65438+ of the original designed annual transportation capacity.
The Tai 'an-Laiwu section of Xintai Railway was basically completed on June 25th-7 -7. 10/0,2065438. The catenary is basically completed, and the arrival and departure lines are extended to1050m. Laiwu West Station was demolished, and a arrival-departure line at Yanjiazhuang Station was demolished. From July 28 to mid-September, the remaining work and transformation of Linzi-Laiwu section were completed. The transformed Linzi. 7054 no longer stops at some stations.
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