At 10:58 on December 8, with the G4821 train departing from Changqing Station in Jinan, Shandong, the Jinan-Zhengzhou high-speed railway (Jinan-Zhengzhou) was fully operational. So far, the high-speed railways of Shandong and Henan provinces have been hand in hand, and the high-speed railways of Shanxi, Hebei, Shandong and Henan provinces have formed a ring.
If you look down from the sky, the Jinan-Zhengzhou high-speed railway is like a "one", connecting Jinan and Zhengzhou, two provincial capitals with a GDP of more than one trillion yuan.
What is the meaning of writing this "one"?
In the past, from Zhengzhou to Jinan, or take the Beijing-Guangzhou high-speed railway, in Shijiazhuang to Shijiazhuang, the shortest time is 3:52;Or take the Xulan high-speed railway, transfer to the Beijing-Shanghai high-speed railway in Xuzhou, the shortest time is 2:52. The two provinces are adjacent to each other, but they always have to go far by high-speed rail.
For Shandong, this is a new passage out of the province. Tan Yuyan, a professor at the School of Transportation of Beijing Jiaotong University, said that from the perspective of the national transportation network, this line has "opened" a number of large passages connecting the north and south and the east and west for Shandong.
For Henan, the opening and operation of the Puyang-Zhengzhou section of the Jinan-Zhengzhou high-speed railway has helped Henan to realize the high-speed rail of all 17 prefecture-level cities, completed the last stroke of the "m"-shaped high-speed rail network, and enhanced the radiation and driving force of the Zhengzhou railway.
The Jizheng high-speed railway passes through 6 cities, directly attracting a population of more than 19 million in the area, connecting the Grand Canal, Dongchang Lake, Baotu Spring and other scenic spots, with rich tourism resources. Tan Yuyan said that the opening of the Jizheng high-speed railway can better play the role of radiation and driving of large cities.
From a national point of view, the Jizheng high-speed railway is an important connecting line of the "eight vertical and eight horizontal" high-speed rail network. It is connected to the Beijing-Shanghai high-speed railway at Jinan West Railway Station, connected to the Beijing-Guangzhou high-speed railway in Zhengzhou, and intersected with the Beijing-Xiongshang high-speed railway under construction at Liaocheng West Railway Station in the middle section.
At the same time, the Jinan-Zhengzhou high-speed railway is connected to the Zhengwan and Chongqing-Kunming high-speed railways to the southwest, and to the northwest to the Zhengxi and Lanxin high-speed railways, which is of great significance for exploring the market potential in the region and jointly building the "Belt and Road".
From a regional point of view, after the opening of the Jinan-Zhengzhou high-speed railway, Jinan, Zhengzhou, Xi'an, Xining and other provincial capitals along the Yellow River will be connected by high-speed rail. On the map, a large channel along the Yellow River will be formed from the Qinghai-Tibet Plateau, the source of the Yellow River in the west, to the mouth of the Yellow River in the east.
How difficult is it to write down this "one"?
The Jizheng high-speed railway spans a number of rivers and crosses the Beijing-Shanghai, Beijing-Kowloon and other railway trunk lines, and the construction difficulty is great, which can be seen from a "bridge".
Walk 5 kilometers south from Jinan West Railway Station, and you will arrive at a "railway overpass": the top layer is the Jinan-Zhengzhou high-speed railway that has just been opened to traffic;In the middle is the Beijing-Shanghai high-speed railway, which opened to traffic in June 2011At the bottom, the Beijing-Shanghai Railway and the Shuibai Railway, formerly known as the Tianjin-Pudong Railway, which were opened to traffic in 1912, are respectively.
The four-line intersection means that the bridge of the Jizheng high-speed railway needs to be erected above all existing lines. In order not to affect the driving below, there is a box girder here that is 186 long7 meters, which is several times the regular length.
Across the existing railway line construction, the more mature process is the rotating beam. Ding Dong, commander of the construction headquarters of the Jizheng high-speed railway of the Tenth Bureau of China Railway, said, but the volume of the rotating beam pier is large and the size of the basic structure parts is large, which may cause the settlement of the Beijing-Shanghai high-speed railway bridge during the construction process.
The design team thought about using a crane, but due to the location in the middle of the line and the narrow space, the large-tonnage crane could not enter.
After half a year of demonstration, the design team decided to adopt the jacking process. First, the assembly and welding of the box girder are completed on the adjacent pier, and then the box girder is pushed to the designated position little by little by using a jack.
To ensure safety, construction can only be carried out during the railway "skylight period", a maximum of 4 hours per day. In addition, the box girder weighs 1696 tons, and 14 500-ton jacks need to operate at the same time, and the single jacking process is only 75 cm.
The cycle went on and on, and it took the construction team 10 days to push the box girder into placeIt took another 10 days to successfully drop the beam 29 meters. "The whole process is as delicate as a surgery, ensuring that the box girder is pushed steadily and accurately. Ding Dong said. Lasted 89 days, 186The 7-meter "steel dragon" finally successfully landed in the air. And along the Jizheng high-speed railway, there are many such projects.
The train is speeding, carrying the dream of local development and the local feelings of the wanderer. Liaocheng City in Shandong Province and Puyang City in Henan Province are connected to the high-speed rail network, and the urban agglomeration of the Shandong Peninsula is interconnected with the urban agglomeration of the Central PlainsFrom Jinan West Railway Station to Zhengzhou East Railway Station in 1 hour and 43 minutes at the earliest, Yuan Xiuhang, who is from Jinan and works hard in Zhengzhou, said excitedly: "The Jinan-Zhengzhou high-speed railway has made my dream closer to my home!".”