Introduction: Chenglan Line is also China's Qinghai-Tibet Railway, after another "sky road" built in the plateau above 3,000 meters above sea level, from the Chengdu plain at an altitude of 500 meters to the Tibetan plateau at an altitude of 3,400 meters. After completing the second level of stairs climbing over the first level of stairs, and then back to the second level of stairs, the line draws a large human character.
Chenglan Railway is the most arduous traffic restoration and reconstruction project in Sichuan Province after the "Wenchuan Earthquake". In addition, there is not even a single train line in Aba Prefecture, which is close to 100,000 square kilometers, so this line definitely gives people the greatest hope. There is also Chengdu to Jiuzhaigou more than 400 kilometers away, but you have to walk nine hours to reach, only the railroad can solve this problem.
Why is the Chenglan Railway so slow to repair
Chenglan Railway has been planned since before 2010
The design speed at that time was 200 km/h
For the national railway level two-line electrification
Fast railroad for passenger and cargo lines
The project started in February 2011
Expected to be fully completed in June 2017
Initially designed with Jiuzhaigou station
Can accommodate 2000 people at the same time
Chengdu to Jiuzhaigou in 2 hours
All of the above are only theoretical
Chengdu to Lanzhou in 4 hours
But at the moment it seems
The soonest will be completed in 2023 to open to traffic
What's more regrettable is the cancellation of Jiuzhaigou station
Why, let's take a look
Chengdu-Lanzhou Railway started in the way of test section first, 10 years of construction is still not open to traffic! The 275 kilometers of construction were all test sections, which is unprecedented in the history of Chinese railroads! The design scheme has been changed several times, and the cost is rocketing, which has been the focus of public opinion.
One important reason is environmental protection and another is that the terrain is quite complex.
01 ralph lauren polo how important is environmental protection ■ ■ ■ ■ ■
✍ Why is the environmental approval of the Chenglan Railway so strict? Because the line goes through the Minjiang River mountain system and the Qinling Mountains, the migration corridor of giant pandas, very many nature reserves and national forest parks, including the Huanglong National Scenic Area, underground water sources and many other environmentally sensitive areas.
Although construction began in 2011, in December 2012, the Ministry of Environmental Protection publicized a number of construction projects for environmental assessment approval, including a "moratorium" on the Chengdu-Lanzhou Railway - Chengdu to Huang Shengguan section, saying that the project may affect the activities and habitat of wildlife such as giant pandas, golden monkeys and black bears, and the growth of wildlife protection plants.
In October 2013, the Ministry of Environmental Protection publicized the approval decision, only approved the official resumption of work on the Chengdu-Chuanzhu section.
But eventually canceled Jiuzhaigou station, or to protect natural resources, at this point it was learned that the Chengdu-Lanzhou Railway has become a cut-off ......
02 ralph lauren polo construction construction is quite difficult ■ ■ ■ ■ ■
The Chengkun Railway, completed in 1970, is called a "geological museum" and its completion is seen as crossing a "life forbidden zone". The "difficulty" of the Chenglan Railway is even greater than that, with high construction difficulty and slow progress.
The whole line of the bridge and tunnel project ratio is large, the terrain is steep, the valley height difference is large, geological disasters are frequent, is China's first railroad through the north-south earthquake zone - because to cross the core area of the Wenchuan earthquake disaster, the industry called "the most complex geological conditions ever route".
There is no precedent for building a railroad in an earthquake zone
Among them, the Longmenshan Fracture Zone consists of three major fractures
The Wenchuan earthquake was located on this fault zone
Only 9.9 km long Mao County Tunnel
More than 6 years to open, an average of less than 5 meters per day
Palm-wide steel bar is squeezed into an "S" shape
The 11-meter diameter space was "reduced" to more than 7 meters in a short period of time
After nearly 10 years of construction, the whole line of Leaping Dragon Gate Tunnel was completed
In addition to the above reasons, the construction of Chengdu-Lanzhou Railway has become a series of twists and turns after the "5-12" earthquake and the "7-23" Yong-Wen Line train accident.
And the lack of funds once also led to a time to be shelved. For example, after taking various environmental protection measures, the total investment cost is as much as five times of the second phase of the Qinghai-Tibet Railway project.
✍ Happily, as of now, the track laying in the plain section of Chengdu has been completed, and the track laying in the plateau section at an altitude of 3,200 meters has begun, which also marks the final stage of the construction of Chenglan Railway (Sichuan section). It is expected to be completed and opened to traffic in 2023.
West Chengdu Railway came out of nowhere
Just at the end of the day
Xining to Chengdu railroad was approved for construction
First to start construction in Qinghai in September 2020
This is an important event in the history of Qinghai railroad construction
Total project investment is 83.1 billion yuan
The total length of the main line is over 800 km
The length of the new lines is about 500 km
Newly built 146 km in Qinghai and 183 km in Gansu
New 172 km in Sichuan
Overall project construction period of 7 years
National Railway Group, Gansu, Qinghai, Sichuan joint construction
Mainly passenger-oriented while taking into account freight transport
Some sections are reserved for speed increase to 250 km/h
Chengdu to Xining by train only takes about 4.5 hours
No more detours through Lanzhou
The full opening time has been cut in half compared to now
✍ The Xining-Chengdu railroad, as an important part of the eighth column of the national medium- and long-term high-speed railroad network "eight vertical and eight horizontal" in the Lan (West) Guangzhou high-speed railway channel, spans Qinghai, Gansu and Sichuan provinces, and leads from Xining to connect with the Lanzhou-Chengdu railroad under construction (Chengdu to Huang Shengguan section) and introduce a common line to the Chengdu hub, since then the redirected Chengdu-Lanzhou line has officially had a new outlet.
According to statistics, the total planned mileage of "eight vertical and eight horizontal" is about 45,600 kilometers, and nearly 70% of the construction has been completed so far. Due to the difficulty of building lines in the central and western mountainous areas, it is expected that the "eight vertical and eight horizontal" channels will be basically completed by 2026 or so.
However, due to the relatively complex terrain in Qinghai Province, which has to pass through two long tunnels and two special bridges, etc., the construction period of the railroad in Qinghai Province is longer than both Gansu and Sichuan. Although the project time took longer, this section of the railroad is very significant for us and can greatly promote the economy and development along the route. Along the line is a bright scenery, cultural and tourism resources are very rich, both Buddhist academy, humanistic landscape and natural landscape, will greatly drive the economic and social development of the deeply impoverished areas such as Haidong, Huangnan and Gannan, which is of great significance to promote the poverty alleviation along the line.
Who is the big winner
For Qinghai: the obvious effect of Xicheng Railway, for the province is to enhance the status of Qinghai in the national "Belt and Road" construction, effectively realize the exchange of people, logistics, information flow, open up the railroad transport channel of Qinghai to Xinjiang in the north and Sichuan in the south, realize the interconnection of Qinghai with the northwest railroad network, southwest railroad network and south China railroad network, will largely improve the economy of Qinghai province.
For the people, it is considered a superb thing, finally ending the history of several cities and states without railroads. Since the day the construction started, the local people have been excited, truly explaining the meaning of the phrase "to get rich, first build a road".
For Gansu: Lancheng line slow in addition to the start of the Sichuan-Tibet line, so that its level of concern has decreased. There is also Gansu side a little passive, because not only the high cost of construction, and more than 100 kilometers in Gansu, only 1 freight station and 2 small passenger stations, compared with Chengdu, feel little benefit, so the will to build is not strong!
However, after the Lanzhou-Chengdu line was changed into the Chengxi line, which also gave Lanzhou a hub status, there was more enthusiasm for the construction of this section of the line from cooperation to Lanzhou.
For Sichuan: the main section of the railroad construction is still in Sichuan, although the Qinghai section is expected to be opened in 2027, the Gansu section in 2026, and the Sichuan section in 2023.
For the people of Sichuan the most concerned question is, what about Chengdu to Jiuzhaigou? In addition to self-driving, in the bus and airplane, there are still two routes related to the railroad.
First: After the opening of the Sichuan section in 2023, you can take the train to Chuanshuangsi and then change to a bus. I can only say that there is better than always, can do a section is a section;
Second: the late Chuanshuangsi to Jiuzhaigou will also repair the mountain track, or very good, look forward to early completion.
In general, although the Lanzhou-Chengdu Railway is discounted, the construction of the West-Chengdu Railway is of greater significance and can be said to be a triple whammy. First of all, the cost savings, as a part of the line and the under-construction Lancheng Railway overlap about 300 kilometers. Secondly, it is to enhance the enthusiasm of Gansu, and the most beneficial to Xining!
The West-Chengdu Railway helps the west take off and is of great significance in promoting the development of the west to form a new pattern. Because, like a huge magnet, the western part of China attracts the eyes of the world.
In short, the construction of the West Railway, the benefit is by no means just the west, but a regional win-win, the country to benefit.
What do you think? Please share and discuss in the comments section!
▌ Declaration: content source public number [city dynamics]